Fix bin/publish: copy docs.dist from project root

Fix bin/publish: use correct .env path for rspade_system
Fix bin/publish script: prevent grep exit code 1 from terminating script

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2025-10-21 02:08:33 +00:00
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# 4.1.11
## Bug Fixes
* fix [CVE-2021-28092](https://nvd.nist.gov/vuln/detail/CVE-2021-28092)
# 4.1.10
## Bug Fixes
* `stylehacks` does not throw error on `[attr]` selector
# 4.1.9
## Performance Improvements
* `postcss-colormin`: increase performance
* `postcss-discard-comments`: increase performance
* `postcss-merge-rules` increase performance
* `postcss-minify-params` increase performance
* `postcss-minify-selectors`: increase performance
* `postcss-normalize-display-values`: increase performance
* `postcss-normalize-positions`: increase performance
* `postcss-normalize-repeat-style`: increase performance
* `postcss-normalize-string`: increase performance
* `postcss-normalize-timing-functions`: increase performance
* `postcss-normalize-whitespace`: increase performance
* `postcss-ordered-values`: increase performance
* `postcss-reduce-transforms`: increase performance
* `postcss-svgo`: increase performance
## Bug Fixes
* `postcss-merge-longhand` handle uppercase properties and values
* `postcss-minify-gradients` handle uppercase properties and values
* `postcss-minify-params` do break `@page` rules
* `postcss-reduce-idents` handle uppercase at-rules
* `postcss-reduce-initial` now uses `repeat` as initial value for `mask-repeat`
* `postcss-reduce-initial` handle uppercase value when you convert to initial
* `stylehacks` handle uppercase properties and values
# 4.1.8
## Performance Improvements
* initial loading time (`require('cssnano')`).
## Bug Fixes
* `postcss-merge-longhand` correctly merging border properties with custom properties.
# 4.1.7
## Bug Fixes
* republish `cssnano` due broken release.
# 4.1.6
## Bug Fixes
* `postcss-merge-longhand` doesn't throw error when merge a border property.
# 4.1.5
## Bug Fixes
* `cssnano` now allow to toggling of plugins in presets using boolean configuration option.
* `postcss-merge-longhand` doesn't merge properties with `unset`.
* `postcss-merge-longhand` correctly merge borders with custom properties.
* `postcss-merge-longhand` doesn't merge redundant values if declarations are of different importance.
## Other changes
* `postcss-calc` updated to `7.0.0` version.
# 4.1.4
## Other changes
* `css-declaration-sorter` now use PostCSS 7.
* `postcss-calc` now use PostCSS 7.
# 4.1.3
## Other changes
* `postcss-minify-font-values` now use PostCSS 7.
* `postcss-discard-duplicates` now use PostCSS 7.
# 4.1.2
## Bug Fixes
* `postcss-svgo` now handle DataURI with uppercase `data` value (`DATA:image/*;...`).
# 4.1.1
## Bug Fixes
* `css-declaration-sorter` was removed from default prevent.
* `postcss-normalize-timing-functions` doesn't lowercased property anymore.
* `postcss-normalize-positons` now handles uppercase properties.
* `postcss-normalize-url` now is case-insensitive.
* `postcss-merge-idents` now is case-insensitive.
* `postcss-merge-rules` now is case-insensitive.
* `postcss-minify-selectors` now is case-insensitive.
* `postcss-minify-font-values` now is case-insensitive.
* `postcss-normalize-unicode` now has correct dependencies.
* `postcss-minify-params` now has correct dependencies.
## Other changes
* `cssnano-preset-advanced` use Autoprefixer 9.
* use PostCSS 7 in all plugins.
# 4.1.0
## Bug Fixes
* `postcss-merge-longhand` doesn't mangle borders.
## Features
* `postcss-ordered-values` support ordering animation values.
# 4.0.5
## Bug Fixes
* `postcss-merge-longhand` now correctly merges borders with custom properties.
* `postcss-merge-longhand` doesn't throw error in some `border` merge cases.
# 4.0.4
## Bug Fixes
* `postcss-merge-longhand` doesn't drop border-width with custom property from border shorthand.
* `postcss-merge-longhand` doesn't convert `currentColor`.
* `postcss-merge-longhand` doesn't merge border properties if there is a shorthand property between them.
# 4.0.3
## Bug Fixes
* `postcss-merge-longhand` incorrect minification of `border` (`border-*`) declarations.
# 4.0.2
## Bug Fixes
* `postcss-merge-longhand` don't explode declarations with custom properties.
* `postcss-colormin` now better transform to `hsl`.
# 4.0.1
## Bug Fixes
* `browserslist` version incompatibility with `caniuse-api`.
# 4.0.0
## Breaking changes
* We dropped support for Node 4, now requiring at least Node 6.9.
## Features
* postcss-merge-longhand now optimises `border-spacing` property.
## Bug Fixes
* postcss-normalize-unicode doesn't change `U` to lowercase for `IE` <= 11 and `Edge` <= 15.
* postcss-merge-longhand works with custom properties (Example `a { border-style:dotted; border-style:var(--variable) }`) correctly.
* postcss-ordered-values handle `border` property with invalid border width value correctly.
* postcss-merge-rules handles `:-ms-input-placeholder` and `::-ms-input-placeholder` selectors correctly.
* postcss-merge-rules works with `all` property correctly.
* postcss-normalize-url don't handle empty `url` function.
* postcss-normalize-url handles `data` and `*-extension://` URLs correctly.
* postcss-colormin adds whitespace after minified value and before function.
* postcss-minify-font-values better escapes font name.
* postcss-minify-params doesn't remove `all` for IE.
## Other changes
* update all dependencies to latest.
* better handles uppercase selectors/properties/values/units.
# 4.0.0-rc.2
## Features
* Includes the new release candidate for postcss-selector-parser 3.
* Refactors comments tokenizing in postcss-discard-comments to be more
memory efficient.
* Adds css-declaration-sorter for improved gzip compression efficiencies
(thanks to @Siilwyn).
* postcss-svgo now optimises base 64 encoded SVG where possible
(thanks to @evilebottnawi).
* stylehacks now supports `@media \0screen\,screen\9 {}` hacks
(thanks to @evilebottnawi).
## Bug Fixes
* Fixed handling of package.json configuration (thanks to @andyjansson).
* Fixed `resolveConfig` for a `Root` node without a `source` property
(thanks to @darthmaim).
* Improved radial gradient handling (thanks to @pigcan).
* stylehacks now properly accounts for vendor prefixes
(thanks to @evilebottnawi).
# 4.0.0-rc.1
## Bug Fixes
* cssnano: Resolved an issue with external configuration which wasn't
being loaded correctly (thanks to @andyjansson).
* postcss-minify-params: Resolved an issue with cssnano's handling of the
`@value` syntax from css-modules to better integrate with css-loader.
# 4.0.0-rc.0
Since version 4 has been in-development for some time, we thought it would be
best to release an alpha version so that we could catch any issues before
the actual release.
## Breaking changes
* cssnano & its plugins have been upgraded to PostCSS 6.x. Please ensure that
for optimal results that you use cssnano with a PostCSS 6 compatible runner
& that any other plugins are also using PostCSS 6.
* cssnano is now essentially a preset loader and does not contain any built-in
transforms (instead, it delegates to `cssnano-preset-default` by default).
Due to the new architecture, it's not possible to exclude asynchronous
transforms and run it synchronously, unlike in 3.x. Any transforms that
were "core" modules have now been extracted out into separate packages.
* Because of the new preset system, cssnano will not accept any transformation
options; these must be set in the preset. The option names remain mostly the
same, except some cases where "core" modules have been extracted out:
* `core` is now `normalizeWhitespace`.
* `reduceBackgroundRepeat` is now `normalizeRepeatStyle`.
* `reduceDisplayValues` is now `normalizeDisplayValues`.
* `reducePositions` is now `normalizePositions`.
* `reduceTimingFunctions` is now `normalizeTimingFunctions`.
* `styleCache` is now `rawCache`.
When excluding transforms, we now have an `exclude` option (in 3.x this was
named `disable`). Similarly, the `safe` option was removed; the defaults
are now much less aggressive.
* By default, the following transforms are no longer applied to any input CSS.
You may see an increased output file size as a result:
* `autoprefixer`
* `postcss-discard-unused`
* `postcss-merge-idents`
* `postcss-reduce-idents`
* `postcss-zindex`
Note that you can load `cssnano-preset-advanced` instead which *does* contain
these transforms.
* We no longer detect previous plugins to silently exclude our own, and now
consider this to be an anti-pattern. So `postcss-filter-plugins` was removed.
* We also changed some options to make the default transforms safer:
* `postcss-minify-font-values`: `removeAfterKeyword` set to `false` from `true`.
* `postcss-normalize-url`: `stripWWW` set to `false` from `true`.
* cssnano now does not accept the `sourcemap` shortcut option; please refer
to the PostCSS documentation on sourcemaps. The `quickstart.js` file included
with this module will give you a good starting point.
* `cssnano.process` is no longer a custom method; we use the built-in `process`
method exposed on each PostCSS plugin. The new signature is
`cssnano.process(css, postcssOpts, cssnanoOpts)`, in 3.x it was
`cssnano.process(css, cssnanoOpts)`.
* We dropped support for Node 0.12, now requiring at least Node 4.
* Finally, cssnano is now developed as a monorepo, due to the fact that some
transforms have a lot of grey area/overlap. Due to this, some modules have
been refactored to delegate responsibility to others, such that duplication
of functionality is minimized. For instance, `postcss-colormin` will no
longer compress whitespace or compress numbers, as those are handled by
`postcss-normalize-whitespace` & `postcss-convert-values` respectively.
## Other changes
* Due to the PostCSS 6 upgrade, we have been able to reduce usage of custom
methods, such as node `clone` behaviour. In cases where some utility
has been used by several plugins it is now a separate package, reducing
cssnano's footprint.
* cssnano now makes much better use of Browserslist. `postcss-colormin` &
`postcss-reduce-initial` were enhanced with different behaviour depending
on which browsers are passed. And now, the footprint for the `caniuse-db`
dependency is much smaller thanks to `caniuse-lite` - 7 times smaller as
of this writing. This makes cssnano much faster to download from npm!
# 3.10.0
* cssnano will no longer `console.warn` any messages when using deprecated
options; these are now sent to PostCSS. You will be able to see them if you
use a PostCSS runner with built-in messages support, or alternately by
loading `postcss-reporter` or `postcss-browser-reporter` in your plugins list.
* Prepares support for `grid` identifier reduction by adding it to the list
of optimisations turned off when `options.safe` is set to `true`.
* Adds support for normalizing `unicode-range` descriptors. Values will
be converted when the code matches `0` & `f` in the same place on both sides
of the range. So, `u+2000-2fff` can be converted to `u+2???`, but
`u+2100-2fff` will be left as it is.
# 3.9.1
* Resolves an integration issue with `v3.9.0`, where `undefined` values
would attempt to be parsed.
# 3.9.0
* Adds a new option to normalize wrapping quotes for strings & joining
multiple-line strings into a single line. This optimisation can potentially
reduce the final gzipped size of your CSS file.
# 3.8.2
* Resolves an issue where `display: list-item inline flow` would be normalized
to `inline list-item` rather than `inline-list-item` (thanks to @mattbasta).
# 3.8.1
* Adds a quick start file for easy integration with Runkit. Try cssnano online
at https://runkit.com/npm/cssnano.
# 3.8.0
* Adds support for normalizing multiple values for the `display` property. For
example `block flow` can be simplified to `block`.
# 3.7.7
* Further improves CSS mixin handling; semicolons will no longer be stripped
from *rules* as well as declarations.
# 3.7.6
* Resolves an issue where the semicolon was being incorrectly stripped
from CSS mixins.
# 3.7.5
* Resolves an issue where the `safe` flag was not being persisted across
multiple files (thanks to @techmatt101).
# 3.7.4
* Improves performance of the reducePositions transform by testing
against `hasOwnProperty` instead of using an array of object keys.
* Removes the redundant `indexes-of` dependency.
# 3.7.3
* Unpins postcss-filter-plugins from `2.0.0` as a fix has landed in the new
version of uniqid.
# 3.7.2
* Temporarily pins postcss-filter-plugins to version `2.0.0` in order to
mitigate an issue with uniqid `3.0.0`.
# 3.7.1
* Enabling safe mode now turns off both postcss-merge-idents &
postcss-normalize-url's `stripWWW` option.
# 3.7.0
* Added: Reduce `background-repeat` definitions; works with both this property
& the `background` shorthand, and aims to compress the extended two value
syntax into the single value syntax.
* Added: Reduce `initial` values for properties when the *actual* initial value
is shorter; for example, `min-width: initial` becomes `min-width: 0`.
# 3.6.2
* Fixed an issue where cssnano would crash on `steps(1)`.
# 3.6.1
* Fixed an issue where cssnano would crash on `steps` functions with a
single argument.
# 3.6.0
* Added `postcss-discard-overridden` to safely discard overridden rules with
the same identifier (thanks to @Justineo).
* Added: Reduce animation/transition timing functions. Detects `cubic-bezier`
functions that are equivalent to the timing keywords and compresses, as well
as normalizing the `steps` timing function.
* Added the `perspective-origin` property to the list of supported properties
transformed by the `reduce-positions` transform.
# 3.5.2
* Resolves an issue where the 3 or 4 value syntax for `background-position`
were being incorrectly converted.
# 3.5.1
* Improves checking for `background-position` values in the `background`
shorthand property.
# 3.5.0
* Adds a new optimisation path which can minimise keyword values for
`background-position` and the `background` shorthand.
* Tweaks to performance in the `core` module, now performs less AST passes.
* Now compiled with Babel 6.
# 3.4.0
* Adds a new optimisation path which can minimise gradient parameters
automatically.
# 3.3.2
* Fixes an issue where using `options.safe` threw an error when cssnano was
not used as part of a PostCSS instance, but standalone (such as in modules
like gulp-cssnano). cssnano now renames `safe` internally to `isSafe`.
# 3.3.1
* Unpins postcss-colormin from `2.1.2`, as the `2.1.3` & `2.1.4` patches had
optimization regressions that are now resolved in `2.1.5`.
# 3.3.0
* Updated modules to use postcss-value-parser version 3 (thanks to @TrySound).
* Now converts between transform functions with postcss-reduce-transforms.
e.g. `translate3d(0, 0, 0)` becomes `translateZ(0)`.
# 3.2.0
* cssnano no longer converts `outline: none` to `outline: 0`, as there are
some cases where the values are not equivalent (thanks to @TrySound).
* cssnano no longer converts for example `16px` to `1pc` *by default*. Length
optimisations can be turned on via `{convertValues: {length: true}}`.
* Improved minimization of css functions (thanks to @TrySound).
# 3.1.0
* This release swaps postcss-single-charset for postcss-normalize-charset,
which can detect encoding to determine whether a charset is necessary.
Optionally, you can set the `add` option to `true` to prepend a UTF-8
charset to the output automatically (thanks to @TrySound).
* A `safe` option was added, which disables more aggressive optimisations, as
a convenient preset configuration (thanks to @TrySound).
* Added an option to convert from `deg` to `turn` & vice versa, & improved
minification performance in functions (thanks to @TrySound).
# 3.0.3
* Fixes an issue where cssnano was removing spaces around forward slashes in
string literals (thanks to @TrySound).
# 3.0.2
* Fixes an issue where cssnano was removing spaces around forward slashes in
calc functions.
# 3.0.1
* Replaced css-list & balanced-match with postcss-value-parser, reducing the
module's overall size (thanks to @TrySound).
# 3.0.0
* All cssnano plugins and cssnano itself have migrated to PostCSS 5.x. Please
make sure that when using the 3.x releases that you use a 5.x compatible
PostCSS runner.
* cssnano will now compress inline SVG through SVGO. Because of this change,
interfacing with cssnano must now be done through an asynchronous API. The
main `process` method has the same signature as a PostCSS processor instance.
* The old options such as `merge` & `fonts` that were deprecated in
release `2.5.0` were removed. The new architecture allows you to specify any
module name to disable it.
* postcss-minify-selectors' at-rule compression was extracted out into
postcss-minify-params (thanks to @TrySound).
* Overall performance of the module has improved dramatically, thanks to work
by @TrySound and input from the community.
* Improved selector merging/deduplication in certain use cases.
* cssnano no longer compresses hex colours in filter properties, to better
support old versions of Internet Explorer (thanks to @faddee).
* cssnano will not merge properties together that have an `inherit` keyword.
* postcss-minify-font-weight & postcss-font-family were consolidated into
postcss-minify-font-values. Using the old options will print deprecation
warnings (thanks to @TrySound).
* The cssnano CLI was extracted into a separate module, so that dependent
modules such as gulp-cssnano don't download unnecessary extras.
# 2.6.1
* Improved performance of the core module `functionOptimiser`.
# 2.6.0
* Adds a new optimisation which re-orders properties that accept values in
an arbitrary order. This can lead to improved merging behaviour in certain
cases.
# 2.5.0
* Adds support for disabling modules of the user's choosing, with new option
names. The old options (such as `merge` & `fonts`) will be removed in `3.0`.
# 2.4.0
* postcss-minify-selectors was extended to add support for conversion of
`::before` to `:before`; this release removes the dedicated
postcss-pseudoelements module.
# 2.3.0
* Consolidated postcss-minify-trbl & two integrated modules into
postcss-merge-longhand.
# 2.2.0
* Replaced integrated plugin filter with postcss-filter-plugins.
* Improved rule merging logic.
* Improved performance across the board by reducing AST iterations where it
was possible to do so.
* cssnano will now perform better whitespace compression when used with other
PostCSS plugins.
# 2.1.1
* Fixes an issue where options were not passed to normalize-url.
# 2.1.0
* Allow `postcss-font-family` to be disabled.
# 2.0.3
* cssnano can now be consumed with the parentheses-less method in PostCSS; e.g.
`postcss([ cssnano ])`.
* Fixes an issue where 'Din' was being picked up by the logic as a numeric
value, causing the full font name to be incorrectly rearranged.
# 2.0.2
* Extract trbl value reducing into a separate module.
* Refactor core longhand optimiser to not rely on trbl cache.
* Adds support for `ch` units; previously they were removed.
* Fixes parsing of some selector hacks.
* Fixes an issue where embedded base 64 data was being converted as if it were
a URL.
# 2.0.1
* Add `postcss-plugin` keyword to package.json.
* Wraps all core processors with the PostCSS 4.1 plugin API.
# 2.0.0
* Adds removal of outdated vendor prefixes based on browser support.
* Addresses an issue where relative path separators were converted to
backslashes on Windows.
* cssnano will now detect previous plugins and silently disable them when the
functionality overlaps. This is to enable faster interoperation with cssnext.
* cssnano now exports as a PostCSS plugin. The simple interface is exposed
at `cssnano.process(css, opts)` instead of `cssnano(css, opts)`.
* Improved URL detection when using two or more in the same declaration.
* node 0.10 is no longer officially supported.
# 1.4.3
* Fixes incorrect minification of `background:none` to `background:0 0`.
# 1.4.2
* Fixes an issue with nested URLs inside `url()` functions.
# 1.4.1
* Addresses an issue where whitespace removal after a CSS function would cause
rendering issues in Internet Explorer.
# 1.4.0
* Adds support for removal of unused `@keyframes` and `@counter-style` at-rules.
* comments: adds support for user-directed removal of comments, with the
`remove` option (thanks to @dmitrykiselyov).
* comments: `removeAllButFirst` now operates on each CSS tree, rather than the
first one passed to cssnano.
# 1.3.3
* Fixes incorrect minification of `border:none` to `border:0 0`.
# 1.3.2
* Improved selector minifying logic, leading to better compression of attribute
selectors.
* Improved comment discarding logic.
# 1.3.1
* Fixes crash on undefined `decl.before` from prior AST.
# 1.3.0
* Added support for bundling cssnano using webpack (thanks to @MoOx).
# 1.2.1
* Fixed a bug where a CSS function keyword inside its value would throw
an error.
# 1.2.0
* Better support for merging properties without the existance of a shorthand
override.
* Can now 'merge forward' adjacent rules as well as the previous 'merge behind'
behaviour, leading to better compression.
* Selector re-ordering now happens last in the chain of plugins, to help clean
up merged selectors.
# 1.1.0
* Now can merge identifiers such as `@keyframes` and `@counter-style` if they
have duplicated properties but are named differently.
* Fixes an issue where duplicated keyframes with the same name would cause
an infinite loop.
# 1.0.2
* Improve module loading logic (thanks to @tunnckoCore).
* Improve minification of numeric values, with better support for `rem`,
trailing zeroes and slash/comma separated values
(thanks to @TrySound & @tunnckoCore).
* Fixed an issue where `-webkit-tap-highlight-color` values were being
incorrectly transformed to `transparent`. This is not supported in Safari.
* Added support for viewport units (thanks to @TrySound).
* Add MIT license file.
# 1.0.1
* Add repository/author links to package.json.
# 1.0.0
* Initial release.

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Copyright (c) Ben Briggs <beneb.info@gmail.com> (http://beneb.info)
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

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# cssnano
For documentation, please see the following links:
* Repository: https://github.com/cssnano/cssnano
* Website: http://cssnano.co

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'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _path = require('path');
var _path2 = _interopRequireDefault(_path);
var _postcss = require('postcss');
var _postcss2 = _interopRequireDefault(_postcss);
var _cosmiconfig = require('cosmiconfig');
var _cosmiconfig2 = _interopRequireDefault(_cosmiconfig);
var _isResolvable = require('is-resolvable');
var _isResolvable2 = _interopRequireDefault(_isResolvable);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const cssnano = 'cssnano';
function initializePlugin(plugin, css, result) {
if (Array.isArray(plugin)) {
const [processor, opts] = plugin;
if (typeof opts === 'undefined' || typeof opts === 'object' && !opts.exclude || typeof opts === 'boolean' && opts === true) {
return Promise.resolve(processor(opts)(css, result));
}
} else {
return Promise.resolve(plugin()(css, result));
}
// Handle excluded plugins
return Promise.resolve();
}
/*
* preset can be one of four possibilities:
* preset = 'default'
* preset = ['default', {}]
* preset = function <- to be invoked
* preset = {plugins: []} <- already invoked function
*/
function resolvePreset(preset) {
let fn, options;
if (Array.isArray(preset)) {
fn = preset[0];
options = preset[1];
} else {
fn = preset;
options = {};
}
// For JS setups where we invoked the preset already
if (preset.plugins) {
return Promise.resolve(preset.plugins);
}
// Provide an alias for the default preset, as it is built-in.
if (fn === 'default') {
return Promise.resolve(require('cssnano-preset-default')(options).plugins);
}
// For non-JS setups; we'll need to invoke the preset ourselves.
if (typeof fn === 'function') {
return Promise.resolve(fn(options).plugins);
}
// Try loading a preset from node_modules
if ((0, _isResolvable2.default)(fn)) {
return Promise.resolve(require(fn)(options).plugins);
}
const sugar = `cssnano-preset-${fn}`;
// Try loading a preset from node_modules (sugar)
if ((0, _isResolvable2.default)(sugar)) {
return Promise.resolve(require(sugar)(options).plugins);
}
// If all else fails, we probably have a typo in the config somewhere
throw new Error(`Cannot load preset "${fn}". Please check your configuration for errors and try again.`);
}
/*
* cssnano will look for configuration firstly as options passed
* directly to it, and failing this it will use cosmiconfig to
* load an external file.
*/
function resolveConfig(css, result, options) {
if (options.preset) {
return resolvePreset(options.preset);
}
const inputFile = css.source && css.source.input && css.source.input.file;
let searchPath = inputFile ? _path2.default.dirname(inputFile) : process.cwd();
let configPath = null;
if (options.configFile) {
searchPath = null;
configPath = _path2.default.resolve(process.cwd(), options.configFile);
}
const configExplorer = (0, _cosmiconfig2.default)(cssnano);
const searchForConfig = configPath ? configExplorer.load(configPath) : configExplorer.search(searchPath);
return searchForConfig.then(config => {
if (config === null) {
return resolvePreset('default');
}
return resolvePreset(config.config.preset || config.config);
});
}
exports.default = _postcss2.default.plugin(cssnano, (options = {}) => {
return (css, result) => {
return resolveConfig(css, result, options).then(plugins => {
return plugins.reduce((promise, plugin) => {
return promise.then(initializePlugin.bind(null, plugin, css, result));
}, Promise.resolve());
});
};
});
module.exports = exports['default'];

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@@ -0,0 +1,151 @@
# Changelog
## 5.2.1
- Chore: Upgrade `js-yaml` to avoid npm audit warning.
## 5.2.0
- Added: `packageProp` values can be arrays of strings, to allow for property names that include periods. (This was possible before, but not documented or deliberately supported.)
- Chore: Replaced the `lodash.get` dependency with a locally defined function.
- Chore: Upgrade `js-yaml` to avoid npm audit warning.
## 5.1.0
- Added: `packageProp` values can include periods to describe paths to nested objects within `package.json`.
## 5.0.7
- Fixed: JS loader bypasses Node's `require` cache, fixing a bug where updates to `.js` config files would not load even when Cosmiconfig was told not to cache.
## 5.0.6
- Fixed: Better error message if the end user tries an extension Cosmiconfig is not configured to understand.
## 5.0.5
- Fixed: `load` and `loadSync` work with paths relative to `process.cwd()`.
## 5.0.4
- Fixed: `rc` files with `.js` extensions included in default `searchPlaces`.
## 5.0.3
- Docs: Minor corrections to documentation. *Released to update package documentation on npm*.
## 5.0.2
- Fixed: Allow `searchSync` and `loadSync` to load JS configuration files whose export is a Promise.
## 5.0.1
The API has been completely revamped to increase clarity and enable a very wide range of new usage. **Please read the readme for all the details.**
While the defaults remain just as useful as before — and you can still pass no options at all — now you can also do all kinds of wild and crazy things.
- The `loaders` option allows you specify custom functions to derive config objects from files. Your loader functions could parse ES2015 modules or TypeScript, JSON5, even INI or XML. Whatever suits you.
- The `searchPlaces` option allows you to specify exactly where cosmiconfig looks within each directory it searches.
- The combination of `loaders` and `searchPlaces` means that you should be able to load pretty much any kind of configuration file you want, from wherever you want it to look.
Additionally, the overloaded `load()` function has been split up into several clear and focused functions:
- `search()` now searches up the directory tree, and `load()` loads a configuration file that you don't need to search for.
- The `sync` option has been replaced with separate synchronous functions: `searchSync()` and `loadSync()`.
- `clearFileCache()` and `clearDirectoryCache()` have been renamed to `clearLoadCache()` and `clearSearchPath()` respectively.
More details:
- The default JS loader uses `require`, instead of `require-from-string`. So you *could* use `require` hooks to control the loading of JS files (e.g. pass them through esm or Babel). In most cases it is probably preferable to use a custom loader.
- The options `rc`, `js`, and `rcExtensions` have all been removed. You can accomplish the same and more with `searchPlaces`.
- The default `searchPlaces` include `rc` files with extensions, e.g. `.thingrc.json`, `.thingrc.yaml`, `.thingrc.yml`. This is the equivalent of switching the default value of the old `rcExtensions` option to `true`.
- The option `rcStrictJson` has been removed. To get the same effect, you can specify `noExt: cosmiconfig.loadJson` in your `loaders` object.
- `packageProp` no longer accepts `false`. If you don't want to look in `package.json`, write a `searchPlaces` array that does not include it.
- By default, empty files are ignored by `search()`. The new option `ignoreEmptySearchPlaces` allows you to load them, instead, in case you want to do something with empty files.
- The option `configPath` has been removed. Just pass your filepaths directory to `load()`.
- Removed the `format` option. Formats are now all handled via the file extensions specified in `loaders`.
(If you're wondering with happened to 5.0.0 ... it was a silly publishing mistake.)
## 4.0.0
- Licensing improvement: updated `parse-json` from `3.0.0` to `4.0.0`(see [sindresorhus/parse-json#12][parse-json-pr-12]).
- Changed: error message format for `JSON` parse errors(see [#101][pr-101]). If you were relying on the format of JSON-parsing error messages, this will be a breaking change for you.
- Changed: set default for `searchPath` as `process.cwd()` in `explorer.load`.
## 3.1.0
- Added: infer format based on filePath
## 3.0.1
- Fixed: memory leak due to bug in `require-from-string`.
- Added: for JSON files, append position to end of error message.
## 3.0.0
- Removed: support for loading config path using the `--config` flag. cosmiconfig will not parse command line arguments. Your application can parse command line arguments and pass them to cosmiconfig.
- Removed: `argv` config option.
- Removed: support for Node versions &lt; 4.
- Added: `sync` option.
- Fixed: Throw a clear error on getting empty config file.
- Fixed: when a `options.configPath` is `package.json`, return the package prop, not the entire JSON file.
## 2.2.2
- Fixed: `options.configPath` and `--config` flag are respected.
## 2.2.0, 2.2.1
- 2.2.0 included a number of improvements but somehow broke stylelint. The changes were reverted in 2.2.1, to be restored later.
## 2.1.3
- Licensing improvement: switched from `json-parse-helpfulerror` to `parse-json`.
## 2.1.2
- Fixed: bug where an `ENOENT` error would be thrown is `searchPath` referenced a non-existent file.
- Fixed: JSON parsing errors in Node v7.
## 2.1.1
- Fixed: swapped `graceful-fs` for regular `fs`, fixing a garbage collection problem.
## 2.1.0
- Added: Node 0.12 support.
## 2.0.2
- Fixed: Node version specified in `package.json`.
## 2.0.1
- Fixed: no more infinite loop in Windows.
## 2.0.0
- Changed: module now creates cosmiconfig instances with `load` methods (see README).
- Added: caching (enabled by the change above).
- Removed: support for Node versions &lt;4.
## 1.1.0
- Add `rcExtensions` option.
## 1.0.2
- Fix handling of `require()`'s within JS module configs.
## 1.0.1
- Switch Promise implementation to pinkie-promise.
## 1.0.0
- Initial release.
[parse-json-pr-12]: https://github.com/sindresorhus/parse-json/pull/12
[pr-101]: https://github.com/davidtheclark/cosmiconfig/pull/101

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The MIT License (MIT)
Copyright (c) 2015 David Clark
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# cosmiconfig
[![Build Status](https://img.shields.io/travis/davidtheclark/cosmiconfig/master.svg?label=unix%20build)](https://travis-ci.org/davidtheclark/cosmiconfig) [![Build status](https://img.shields.io/appveyor/ci/davidtheclark/cosmiconfig/master.svg?label=windows%20build)](https://ci.appveyor.com/project/davidtheclark/cosmiconfig/branch/master)
[![codecov](https://codecov.io/gh/davidtheclark/cosmiconfig/branch/master/graph/badge.svg)](https://codecov.io/gh/davidtheclark/cosmiconfig)
Cosmiconfig searches for and loads configuration for your program.
It features smart defaults based on conventional expectations in the JavaScript ecosystem.
But it's also flexible enough to search wherever you'd like to search, and load whatever you'd like to load.
By default, Cosmiconfig will start where you tell it to start and search up the directory tree for the following:
- a `package.json` property
- a JSON or YAML, extensionless "rc file"
- an "rc file" with the extensions `.json`, `.yaml`, `.yml`, or `.js`.
- a `.config.js` CommonJS module
For example, if your module's name is "soursocks", cosmiconfig will search up the directory tree for configuration in the following places:
- a `soursocks` property in `package.json`
- a `.soursocksrc` file in JSON or YAML format
- a `.soursocksrc.json` file
- a `.soursocksrc.yaml`, `.soursocksrc.yml`, or `.soursocksrc.js` file
- a `soursocks.config.js` file exporting a JS object
Cosmiconfig continues to search up the directory tree, checking each of these places in each directory, until it finds some acceptable configuration (or hits the home directory).
👀 **Looking for the v4 docs?**
v5 involves significant revisions to Cosmiconfig's API, allowing for much greater flexibility and clarifying some things.
If you have trouble switching from v4 to v5, please file an issue.
If you are still using v4, those v4 docs are available [in the `4.0.0` tag](https://github.com/davidtheclark/cosmiconfig/tree/4.0.0).
## Table of contents
- [Installation](#installation)
- [Usage](#usage)
- [Result](#result)
- [cosmiconfig()](#cosmiconfig-1)
- [moduleName](#modulename)
- [explorer.search()](#explorersearch)
- [searchFrom](#searchfrom)
- [explorer.searchSync()](#explorersearchsync)
- [explorer.load()](#explorerload)
- [explorer.loadSync()](#explorerloadsync)
- [explorer.clearLoadCache()](#explorerclearloadcache)
- [explorer.clearSearchCache()](#explorerclearsearchcache)
- [explorer.clearCaches()](#explorerclearcaches)
- [cosmiconfigOptions](#cosmiconfigoptions)
- [searchPlaces](#searchplaces)
- [loaders](#loaders)
- [packageProp](#packageprop)
- [stopDir](#stopdir)
- [cache](#cache)
- [transform](#transform)
- [ignoreEmptySearchPlaces](#ignoreemptysearchplaces)
- [Caching](#caching)
- [Differences from rc](#differences-from-rc)
- [Contributing & Development](#contributing--development)
## Installation
```
npm install cosmiconfig
```
Tested in Node 4+.
## Usage
Create a Cosmiconfig explorer, then either `search` for or directly `load` a configuration file.
```js
const cosmiconfig = require('cosmiconfig');
// ...
const explorer = cosmiconfig(moduleName);
// Search for a configuration by walking up directories.
// See documentation for search, below.
explorer.search()
.then((result) => {
// result.config is the parsed configuration object.
// result.filepath is the path to the config file that was found.
// result.isEmpty is true if there was nothing to parse in the config file.
})
.catch((error) => {
// Do something constructive.
});
// Load a configuration directly when you know where it should be.
// The result object is the same as for search.
// See documentation for load, below.
explorer.load(pathToConfig).then(..);
// You can also search and load synchronously.
const searchedFor = explorer.searchSync();
const loaded = explorer.loadSync(pathToConfig);
```
## Result
The result object you get from `search` or `load` has the following properties:
- **config:** The parsed configuration object. `undefined` if the file is empty.
- **filepath:** The path to the configuration file that was found.
- **isEmpty:** `true` if the configuration file is empty. This property will not be present if the configuration file is not empty.
## cosmiconfig()
```js
const explorer = cosmiconfig(moduleName[, cosmiconfigOptions])
```
Creates a cosmiconfig instance ("explorer") configured according to the arguments, and initializes its caches.
### moduleName
Type: `string`. **Required.**
Your module name. This is used to create the default [`searchPlaces`] and [`packageProp`].
**[`cosmiconfigOptions`] are documented below.**
You may not need them, and should first read about the functions you'll use.
## explorer.search()
```js
explorer.search([searchFrom]).then(result => {..})
```
Searches for a configuration file. Returns a Promise that resolves with a [result] or with `null`, if no configuration file is found.
You can do the same thing synchronously with [`searchSync()`].
Let's say your module name is `goldengrahams` so you initialized with `const explorer = cosmiconfig('goldengrahams');`.
Here's how your default [`search()`] will work:
- Starting from `process.cwd()` (or some other directory defined by the `searchFrom` argument to [`search()`]), look for configuration objects in the following places:
1. A `goldengrahams` property in a `package.json` file.
2. A `.goldengrahamsrc` file with JSON or YAML syntax.
3. A `.goldengrahamsrc.json` file.
4. A `.goldengrahamsrc.yaml`, `.goldengrahamsrc.yml`, or `.goldengrahamsrc.js` file.
5. A `goldengrahams.config.js` JS file exporting the object.
- If none of those searches reveal a configuration object, move up one directory level and try again.
So the search continues in `./`, `../`, `../../`, `../../../`, etc., checking the same places in each directory.
- Continue searching until arriving at your home directory (or some other directory defined by the cosmiconfig option [`stopDir`]).
- If at any point a parseable configuration is found, the [`search()`] Promise resolves with its [result] \(or, with [`searchSync()`], the [result] is returned).
- If no configuration object is found, the [`search()`] Promise resolves with `null` (or, with [`searchSync()`], `null` is returned).
- If a configuration object is found *but is malformed* (causing a parsing error), the [`search()`] Promise rejects with that error (so you should `.catch()` it). (Or, with [`searchSync()`], the error is thrown.)
**If you know exactly where your configuration file should be, you can use [`load()`], instead.**
**The search process is highly customizable.**
Use the cosmiconfig options [`searchPlaces`] and [`loaders`] to precisely define where you want to look for configurations and how you want to load them.
### searchFrom
Type: `string`.
Default: `process.cwd()`.
A filename.
[`search()`] will start its search here.
If the value is a directory, that's where the search starts.
If it's a file, the search starts in that file's directory.
## explorer.searchSync()
```js
const result = explorer.searchSync([searchFrom]);
```
Synchronous version of [`search()`].
Returns a [result] or `null`.
## explorer.load()
```js
explorer.load(loadPath).then(result => {..})
```
Loads a configuration file. Returns a Promise that resolves with a [result] or rejects with an error (if the file does not exist or cannot be loaded).
Use `load` if you already know where the configuration file is and you just need to load it.
```js
explorer.load('load/this/file.json'); // Tries to load load/this/file.json.
```
If you load a `package.json` file, the result will be derived from whatever property is specified as your [`packageProp`].
## explorer.loadSync()
```js
const result = explorer.loadSync(loadPath);
```
Synchronous version of [`load()`].
Returns a [result].
## explorer.clearLoadCache()
Clears the cache used in [`load()`].
## explorer.clearSearchCache()
Clears the cache used in [`search()`].
## explorer.clearCaches()
Performs both [`clearLoadCache()`] and [`clearSearchCache()`].
## cosmiconfigOptions
Type: `Object`.
Possible options are documented below.
### searchPlaces
Type: `Array<string>`.
Default: See below.
An array of places that [`search()`] will check in each directory as it moves up the directory tree.
Each place is relative to the directory being searched, and the places are checked in the specified order.
**Default `searchPlaces`:**
```js
[
'package.json',
`.${moduleName}rc`,
`.${moduleName}rc.json`,
`.${moduleName}rc.yaml`,
`.${moduleName}rc.yml`,
`.${moduleName}rc.js`,
`${moduleName}.config.js`,
]
```
Create your own array to search more, fewer, or altogether different places.
Every item in `searchPlaces` needs to have a loader in [`loaders`] that corresponds to its extension.
(Common extensions are covered by default loaders.)
Read more about [`loaders`] below.
`package.json` is a special value: When it is included in `searchPlaces`, Cosmiconfig will always parse it as JSON and load a property within it, not the whole file.
That property is defined with the [`packageProp`] option, and defaults to your module name.
Examples, with a module named `porgy`:
```js
// Disallow extensions on rc files:
[
'package.json',
'.porgyrc',
'porgy.config.js'
]
// ESLint searches for configuration in these places:
[
'.eslintrc.js',
'.eslintrc.yaml',
'.eslintrc.yml',
'.eslintrc.json',
'.eslintrc',
'package.json'
]
// Babel looks in fewer places:
[
'package.json',
'.babelrc'
]
// Maybe you want to look for a wide variety of JS flavors:
[
'porgy.config.js',
'porgy.config.mjs',
'porgy.config.ts',
'porgy.config.coffee'
]
// ^^ You will need to designate custom loaders to tell
// Cosmiconfig how to handle these special JS flavors.
// Look within a .config/ subdirectory of every searched directory:
[
'package.json',
'.porgyrc',
'.config/.porgyrc',
'.porgyrc.json',
'.config/.porgyrc.json'
]
```
### loaders
Type: `Object`.
Default: See below.
An object that maps extensions to the loader functions responsible for loading and parsing files with those extensions.
Cosmiconfig exposes its default loaders for `.js`, `.json`, and `.yaml` as `cosmiconfig.loadJs`, `cosmiconfig.loadJson`, and `cosmiconfig.loadYaml`, respectively.
**Default `loaders`:**
```js
{
'.json': cosmiconfig.loadJson,
'.yaml': cosmiconfig.loadYaml,
'.yml': cosmiconfig.loadYaml,
'.js': cosmiconfig.loadJs,
noExt: cosmiconfig.loadYaml
}
```
(YAML is a superset of JSON; which means YAML parsers can parse JSON; which is how extensionless files can be either YAML *or* JSON with only one parser.)
**If you provide a `loaders` object, your object will be *merged* with the defaults.**
So you can override one or two without having to override them all.
**Keys in `loaders`** are extensions (starting with a period), or `noExt` to specify the loader for files *without* extensions, like `.soursocksrc`.
**Values in `loaders`** are either a loader function (described below) or an object with `sync` and/or `async` properties, whose values are loader functions.
**The most common use case for custom loaders value is to load extensionless `rc` files as strict JSON**, instead of JSON *or* YAML (the default).
To accomplish that, provide the following `loaders` value:
```js
{
noExt: cosmiconfig.loadJson
}
```
If you want to load files that are not handled by the loader functions Cosmiconfig exposes, you can write a custom loader function or use one from NPM if it exists.
**Third-party loaders:**
- [@endemolshinegroup/cosmiconfig-typescript-loader](https://github.com/EndemolShineGroup/cosmiconfig-typescript-loader)
**Use cases for custom loader function:**
- Allow configuration syntaxes that aren't handled by Cosmiconfig's defaults, like JSON5, INI, or XML.
- Allow ES2015 modules from `.mjs` configuration files.
- Parse JS files with Babel before deriving the configuration.
**Custom loader functions** have the following signature:
```js
// Sync
(filepath: string, content: string) => Object | null
// Async
(filepath: string, content: string) => Object | null | Promise<Object | null>
```
Cosmiconfig reads the file when it checks whether the file exists, so it will provide you with both the file's path and its content.
Do whatever you need to, and return either a configuration object or `null` (or, for async-only loaders, a Promise that resolves with one of those).
`null` indicates that no real configuration was found and the search should continue.
It's easiest if you make your custom loader function synchronous.
Then it can be used regardless of whether you end up calling [`search()`] or [`searchSync()`], [`load()`] or [`loadSync()`].
If you want or need to provide an async-only loader, you can do so by making the value of `loaders` an object with an `async` property whose value is the async loader.
You can also add a `sync` property to designate a sync loader, if you want to use both async and sync search and load functions.
A few things to note:
- If you use a custom loader, be aware of whether it's sync or async and how that aligned with your usage of sync or async search and load functions.
- **Special JS syntax can also be handled by using a `require` hook**, because `cosmiconfig.loadJs` just uses `require`.
Whether you use custom loaders or a `require` hook is up to you.
Examples:
```js
// Allow JSON5 syntax:
{
'.json': json5Loader
}
// Allow XML, and treat sync and async separately:
{
'.xml': { async: asyncXmlLoader, sync: syncXmlLoader }
}
// Allow a special configuration syntax of your own creation:
{
'.special': specialLoader
}
// Allow many flavors of JS, using custom loaders:
{
'.mjs': esmLoader,
'.ts': typeScriptLoader,
'.coffee': coffeeScriptLoader
}
// Allow many flavors of JS but rely on require hooks:
{
'.mjs': cosmiconfig.loadJs,
'.ts': cosmiconfig.loadJs,
'.coffee': cosmiconfig.loadJs
}
```
### packageProp
Type: `string | Array<string>`.
Default: `` `${moduleName}` ``.
Name of the property in `package.json` to look for.
Use a period-delimited string or an array of strings to describe a path to nested properties.
For example, the value `'configs.myPackage'` or `['configs', 'myPackage']` will get you the `"myPackage"` value in a `package.json` like this:
```json
{
"configs": {
"myPackage": {..}
}
}
```
If nested property names within the path include periods, you need to use an array of strings. For example, the value `['configs', 'foo.bar', 'baz']` will get you the `"baz"` value in a `package.json` like this:
```json
{
"configs": {
"foo.bar": {
"baz": {..}
}
}
}
```
If a string includes period but corresponds to a top-level property name, it will not be interpreted as a period-delimited path. For example, the value `'one.two'` will get you the `"three"` value in a `package.json` like this:
```json
{
"one.two": "three",
"one": {
"two": "four"
}
}
```
### stopDir
Type: `string`.
Default: Absolute path to your home directory.
Directory where the search will stop.
### cache
Type: `boolean`.
Default: `true`.
If `false`, no caches will be used.
Read more about ["Caching"](#caching) below.
### transform
Type: `(Result) => Promise<Result> | Result`.
A function that transforms the parsed configuration. Receives the [result].
If using [`search()`] or [`load()`] \(which are async), the transform function can return the transformed result or return a Promise that resolves with the transformed result.
If using [`searchSync()`] or [`loadSync()`], the function must be synchronous and return the transformed result.
The reason you might use this option — instead of simply applying your transform function some other way — is that *the transformed result will be cached*. If your transformation involves additional filesystem I/O or other potentially slow processing, you can use this option to avoid repeating those steps every time a given configuration is searched or loaded.
### ignoreEmptySearchPlaces
Type: `boolean`.
Default: `true`.
By default, if [`search()`] encounters an empty file (containing nothing but whitespace) in one of the [`searchPlaces`], it will ignore the empty file and move on.
If you'd like to load empty configuration files, instead, set this option to `false`.
Why might you want to load empty configuration files?
If you want to throw an error, or if an empty configuration file means something to your program.
## Caching
As of v2, cosmiconfig uses caching to reduce the need for repetitious reading of the filesystem or expensive transforms. Every new cosmiconfig instance (created with `cosmiconfig()`) has its own caches.
To avoid or work around caching, you can do the following:
- Set the `cosmiconfig` option [`cache`] to `false`.
- Use the cache-clearing methods [`clearLoadCache()`], [`clearSearchCache()`], and [`clearCaches()`].
- Create separate instances of cosmiconfig (separate "explorers").
## Differences from [rc](https://github.com/dominictarr/rc)
[rc](https://github.com/dominictarr/rc) serves its focused purpose well. cosmiconfig differs in a few key ways — making it more useful for some projects, less useful for others:
- Looks for configuration in some different places: in a `package.json` property, an rc file, a `.config.js` file, and rc files with extensions.
- Built-in support for JSON, YAML, and CommonJS formats.
- Stops at the first configuration found, instead of finding all that can be found up the directory tree and merging them automatically.
- Options.
- Asynchronous by default (though can be run synchronously).
## Contributing & Development
Please note that this project is released with a [Contributor Code of Conduct](CODE_OF_CONDUCT.md). By participating in this project you agree to abide by its terms.
And please do participate!
[result]: #result
[`load()`]: #explorerload
[`loadsync()`]: #explorerloadsync
[`search()`]: #explorersearch
[`searchsync()`]: #explorersearchsync
[`clearloadcache()`]: #explorerclearloadcache
[`clearsearchcache()`]: #explorerclearsearchcache
[`clearcaches()`]: #explorerclearcaches
[`packageprop`]: #packageprop
[`cache`]: #cache
[`stopdir`]: #stopdir
[`searchplaces`]: #searchplaces
[`loaders`]: #loaders
[`cosmiconfigoptions`]: #cosmiconfigoptions

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//
'use strict';
function cacheWrapper (cache , key , fn ) {
if (!cache) {
return fn();
}
const cached = cache.get(key);
if (cached !== undefined) {
return cached;
}
const result = fn();
cache.set(key, result);
return result;
}
module.exports = cacheWrapper;

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//
'use strict';
const path = require('path');
const loaders = require('./loaders');
const readFile = require('./readFile');
const cacheWrapper = require('./cacheWrapper');
const getDirectory = require('./getDirectory');
const getPropertyByPath = require('./getPropertyByPath');
const MODE_SYNC = 'sync';
// An object value represents a config object.
// null represents that the loader did not find anything relevant.
// undefined represents that the loader found something relevant
// but it was empty.
class Explorer {
constructor(options ) {
this.loadCache = options.cache ? new Map() : null;
this.loadSyncCache = options.cache ? new Map() : null;
this.searchCache = options.cache ? new Map() : null;
this.searchSyncCache = options.cache ? new Map() : null;
this.config = options;
this.validateConfig();
}
clearLoadCache() {
if (this.loadCache) {
this.loadCache.clear();
}
if (this.loadSyncCache) {
this.loadSyncCache.clear();
}
}
clearSearchCache() {
if (this.searchCache) {
this.searchCache.clear();
}
if (this.searchSyncCache) {
this.searchSyncCache.clear();
}
}
clearCaches() {
this.clearLoadCache();
this.clearSearchCache();
}
validateConfig() {
const config = this.config;
config.searchPlaces.forEach(place => {
const loaderKey = path.extname(place) || 'noExt';
const loader = config.loaders[loaderKey];
if (!loader) {
throw new Error(
`No loader specified for ${getExtensionDescription(
place
)}, so searchPlaces item "${place}" is invalid`
);
}
});
}
search(searchFrom ) {
searchFrom = searchFrom || process.cwd();
return getDirectory(searchFrom).then(dir => {
return this.searchFromDirectory(dir);
});
}
searchFromDirectory(dir ) {
const absoluteDir = path.resolve(process.cwd(), dir);
const run = () => {
return this.searchDirectory(absoluteDir).then(result => {
const nextDir = this.nextDirectoryToSearch(absoluteDir, result);
if (nextDir) {
return this.searchFromDirectory(nextDir);
}
return this.config.transform(result);
});
};
if (this.searchCache) {
return cacheWrapper(this.searchCache, absoluteDir, run);
}
return run();
}
searchSync(searchFrom ) {
searchFrom = searchFrom || process.cwd();
const dir = getDirectory.sync(searchFrom);
return this.searchFromDirectorySync(dir);
}
searchFromDirectorySync(dir ) {
const absoluteDir = path.resolve(process.cwd(), dir);
const run = () => {
const result = this.searchDirectorySync(absoluteDir);
const nextDir = this.nextDirectoryToSearch(absoluteDir, result);
if (nextDir) {
return this.searchFromDirectorySync(nextDir);
}
return this.config.transform(result);
};
if (this.searchSyncCache) {
return cacheWrapper(this.searchSyncCache, absoluteDir, run);
}
return run();
}
searchDirectory(dir ) {
return this.config.searchPlaces.reduce((prevResultPromise, place) => {
return prevResultPromise.then(prevResult => {
if (this.shouldSearchStopWithResult(prevResult)) {
return prevResult;
}
return this.loadSearchPlace(dir, place);
});
}, Promise.resolve(null));
}
searchDirectorySync(dir ) {
let result = null;
for (const place of this.config.searchPlaces) {
result = this.loadSearchPlaceSync(dir, place);
if (this.shouldSearchStopWithResult(result)) break;
}
return result;
}
shouldSearchStopWithResult(result ) {
if (result === null) return false;
if (result.isEmpty && this.config.ignoreEmptySearchPlaces) return false;
return true;
}
loadSearchPlace(dir , place ) {
const filepath = path.join(dir, place);
return readFile(filepath).then(content => {
return this.createCosmiconfigResult(filepath, content);
});
}
loadSearchPlaceSync(dir , place ) {
const filepath = path.join(dir, place);
const content = readFile.sync(filepath);
return this.createCosmiconfigResultSync(filepath, content);
}
nextDirectoryToSearch(
currentDir ,
currentResult
) {
if (this.shouldSearchStopWithResult(currentResult)) {
return null;
}
const nextDir = nextDirUp(currentDir);
if (nextDir === currentDir || currentDir === this.config.stopDir) {
return null;
}
return nextDir;
}
loadPackageProp(filepath , content ) {
const parsedContent = loaders.loadJson(filepath, content);
const packagePropValue = getPropertyByPath(
parsedContent,
this.config.packageProp
);
return packagePropValue || null;
}
getLoaderEntryForFile(filepath ) {
if (path.basename(filepath) === 'package.json') {
const loader = this.loadPackageProp.bind(this);
return { sync: loader, async: loader };
}
const loaderKey = path.extname(filepath) || 'noExt';
return this.config.loaders[loaderKey] || {};
}
getSyncLoaderForFile(filepath ) {
const entry = this.getLoaderEntryForFile(filepath);
if (!entry.sync) {
throw new Error(
`No sync loader specified for ${getExtensionDescription(filepath)}`
);
}
return entry.sync;
}
getAsyncLoaderForFile(filepath ) {
const entry = this.getLoaderEntryForFile(filepath);
const loader = entry.async || entry.sync;
if (!loader) {
throw new Error(
`No async loader specified for ${getExtensionDescription(filepath)}`
);
}
return loader;
}
loadFileContent(
mode ,
filepath ,
content
) {
if (content === null) {
return null;
}
if (content.trim() === '') {
return undefined;
}
const loader =
mode === MODE_SYNC
? this.getSyncLoaderForFile(filepath)
: this.getAsyncLoaderForFile(filepath);
return loader(filepath, content);
}
loadedContentToCosmiconfigResult(
filepath ,
loadedContent
) {
if (loadedContent === null) {
return null;
}
if (loadedContent === undefined) {
return { filepath, config: undefined, isEmpty: true };
}
return { config: loadedContent, filepath };
}
createCosmiconfigResult(
filepath ,
content
) {
return Promise.resolve()
.then(() => {
return this.loadFileContent('async', filepath, content);
})
.then(loaderResult => {
return this.loadedContentToCosmiconfigResult(filepath, loaderResult);
});
}
createCosmiconfigResultSync(
filepath ,
content
) {
const loaderResult = this.loadFileContent('sync', filepath, content);
return this.loadedContentToCosmiconfigResult(filepath, loaderResult);
}
validateFilePath(filepath ) {
if (!filepath) {
throw new Error('load and loadSync must pass a non-empty string');
}
}
load(filepath ) {
return Promise.resolve().then(() => {
this.validateFilePath(filepath);
const absoluteFilePath = path.resolve(process.cwd(), filepath);
return cacheWrapper(this.loadCache, absoluteFilePath, () => {
return readFile(absoluteFilePath, { throwNotFound: true })
.then(content => {
return this.createCosmiconfigResult(absoluteFilePath, content);
})
.then(this.config.transform);
});
});
}
loadSync(filepath ) {
this.validateFilePath(filepath);
const absoluteFilePath = path.resolve(process.cwd(), filepath);
return cacheWrapper(this.loadSyncCache, absoluteFilePath, () => {
const content = readFile.sync(absoluteFilePath, { throwNotFound: true });
const result = this.createCosmiconfigResultSync(
absoluteFilePath,
content
);
return this.config.transform(result);
});
}
}
module.exports = function createExplorer(options ) {
const explorer = new Explorer(options);
return {
search: explorer.search.bind(explorer),
searchSync: explorer.searchSync.bind(explorer),
load: explorer.load.bind(explorer),
loadSync: explorer.loadSync.bind(explorer),
clearLoadCache: explorer.clearLoadCache.bind(explorer),
clearSearchCache: explorer.clearSearchCache.bind(explorer),
clearCaches: explorer.clearCaches.bind(explorer),
};
};
function nextDirUp(dir ) {
return path.dirname(dir);
}
function getExtensionDescription(filepath ) {
const ext = path.extname(filepath);
return ext ? `extension "${ext}"` : 'files without extensions';
}

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@@ -0,0 +1,22 @@
//
'use strict';
const path = require('path');
const isDirectory = require('is-directory');
function getDirectory(filepath ) {
return new Promise((resolve, reject) => {
return isDirectory(filepath, (err, filepathIsDirectory) => {
if (err) {
return reject(err);
}
return resolve(filepathIsDirectory ? filepath : path.dirname(filepath));
});
});
}
getDirectory.sync = function getDirectorySync(filepath ) {
return isDirectory.sync(filepath) ? filepath : path.dirname(filepath);
};
module.exports = getDirectory;

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@@ -0,0 +1,23 @@
//
'use strict';
// Resolves property names or property paths defined with period-delimited
// strings or arrays of strings. Property names that are found on the source
// object are used directly (even if they include a period).
// Nested property names that include periods, within a path, are only
// understood in array paths.
function getPropertyByPath(source , path ) {
if (typeof path === 'string' && source.hasOwnProperty(path)) {
return source[path];
}
const parsedPath = typeof path === 'string' ? path.split('.') : path;
return parsedPath.reduce((previous, key) => {
if (previous === undefined) {
return previous;
}
return previous[key];
}, source);
}
module.exports = getPropertyByPath;

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@@ -0,0 +1,81 @@
//
'use strict';
const os = require('os');
const createExplorer = require('./createExplorer');
const loaders = require('./loaders');
module.exports = cosmiconfig;
function cosmiconfig(
moduleName ,
options
) {
options = options || {};
const defaults = {
packageProp: moduleName,
searchPlaces: [
'package.json',
`.${moduleName}rc`,
`.${moduleName}rc.json`,
`.${moduleName}rc.yaml`,
`.${moduleName}rc.yml`,
`.${moduleName}rc.js`,
`${moduleName}.config.js`,
],
ignoreEmptySearchPlaces: true,
stopDir: os.homedir(),
cache: true,
transform: identity,
};
const normalizedOptions = Object.assign(
{},
defaults,
options,
{
loaders: normalizeLoaders(options.loaders),
}
);
return createExplorer(normalizedOptions);
}
cosmiconfig.loadJs = loaders.loadJs;
cosmiconfig.loadJson = loaders.loadJson;
cosmiconfig.loadYaml = loaders.loadYaml;
function normalizeLoaders(rawLoaders ) {
const defaults = {
'.js': { sync: loaders.loadJs, async: loaders.loadJs },
'.json': { sync: loaders.loadJson, async: loaders.loadJson },
'.yaml': { sync: loaders.loadYaml, async: loaders.loadYaml },
'.yml': { sync: loaders.loadYaml, async: loaders.loadYaml },
noExt: { sync: loaders.loadYaml, async: loaders.loadYaml },
};
if (!rawLoaders) {
return defaults;
}
return Object.keys(rawLoaders).reduce((result, ext) => {
const entry = rawLoaders && rawLoaders[ext];
if (typeof entry === 'function') {
result[ext] = { sync: entry, async: entry };
} else {
result[ext] = entry;
}
return result;
}, defaults);
}
function identity(x) {
return x;
}

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@@ -0,0 +1,30 @@
//
'use strict';
const parseJson = require('parse-json');
const yaml = require('js-yaml');
const importFresh = require('import-fresh');
function loadJs(filepath ) {
const result = importFresh(filepath);
return result;
}
function loadJson(filepath , content ) {
try {
return parseJson(content);
} catch (err) {
err.message = `JSON Error in ${filepath}:\n${err.message}`;
throw err;
}
}
function loadYaml(filepath , content ) {
return yaml.safeLoad(content, { filename: filepath });
}
module.exports = {
loadJs,
loadJson,
loadYaml,
};

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@@ -0,0 +1,42 @@
//
'use strict';
const fs = require('fs');
function readFile(filepath , options ) {
options = options || {};
const throwNotFound = options.throwNotFound || false;
return new Promise((resolve, reject) => {
fs.readFile(filepath, 'utf8', (err, content) => {
if (err && err.code === 'ENOENT' && !throwNotFound) {
return resolve(null);
}
if (err) return reject(err);
resolve(content);
});
});
}
readFile.sync = function readFileSync(
filepath ,
options
) {
options = options || {};
const throwNotFound = options.throwNotFound || false;
try {
return fs.readFileSync(filepath, 'utf8');
} catch (err) {
if (err.code === 'ENOENT' && !throwNotFound) {
return null;
}
throw err;
}
};
module.exports = readFile;

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@@ -0,0 +1 @@
../../../../../js-yaml/bin/js-yaml.js

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@@ -0,0 +1,29 @@
'use strict';
const path = require('path');
const resolveFrom = require('resolve-from');
const callerPath = require('caller-path');
module.exports = moduleId => {
if (typeof moduleId !== 'string') {
throw new TypeError('Expected a string');
}
const filePath = resolveFrom(path.dirname(callerPath()), moduleId);
// Delete itself from module parent
if (require.cache[filePath] && require.cache[filePath].parent) {
let i = require.cache[filePath].parent.children.length;
while (i--) {
if (require.cache[filePath].parent.children[i].id === filePath) {
require.cache[filePath].parent.children.splice(i, 1);
}
}
}
// Delete module from cache
delete require.cache[filePath];
// Return fresh module
return require(filePath);
};

View File

@@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

View File

@@ -0,0 +1,50 @@
# import-fresh [![Build Status](https://travis-ci.org/sindresorhus/import-fresh.svg?branch=master)](https://travis-ci.org/sindresorhus/import-fresh)
> Import a module while bypassing the [cache](https://nodejs.org/api/modules.html#modules_caching)
Useful for testing purposes when you need to freshly import a module.
## Install
```
$ npm install --save import-fresh
```
## Usage
```js
// foo.js
let i = 0;
module.exports = () => ++i;
```
```js
const importFresh = require('import-fresh');
require('./foo')();
//=> 1
require('./foo')();
//=> 2
importFresh('./foo')();
//=> 1
importFresh('./foo')();
//=> 1
```
## Related
- [clear-module](https://github.com/sindresorhus/clear-module) - Clear a module from the import cache
- [import-from](https://github.com/sindresorhus/import-from) - Import a module from a given path
- [import-cwd](https://github.com/sindresorhus/import-cwd) - Import a module from the current working directory
- [import-lazy](https://github.com/sindresorhus/import-lazy) - Import modules lazily
## License
MIT © [Sindre Sorhus](https://sindresorhus.com)

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@@ -0,0 +1,33 @@
'use strict';
const errorEx = require('error-ex');
const fallback = require('json-parse-better-errors');
const JSONError = errorEx('JSONError', {
fileName: errorEx.append('in %s')
});
module.exports = (input, reviver, filename) => {
if (typeof reviver === 'string') {
filename = reviver;
reviver = null;
}
try {
try {
return JSON.parse(input, reviver);
} catch (err) {
fallback(input, reviver);
throw err;
}
} catch (err) {
err.message = err.message.replace(/\n/g, '');
const jsonErr = new JSONError(err);
if (filename) {
jsonErr.fileName = filename;
}
throw jsonErr;
}
};

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@@ -0,0 +1,9 @@
MIT License
Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

View File

@@ -0,0 +1,83 @@
# parse-json [![Build Status](https://travis-ci.org/sindresorhus/parse-json.svg?branch=master)](https://travis-ci.org/sindresorhus/parse-json)
> Parse JSON with more helpful errors
## Install
```
$ npm install parse-json
```
## Usage
```js
const parseJson = require('parse-json');
const json = '{\n\t"foo": true,\n}';
JSON.parse(json);
/*
undefined:3
}
^
SyntaxError: Unexpected token }
*/
parseJson(json);
/*
JSONError: Trailing comma in object at 3:1
}
^
*/
parseJson(json, 'foo.json');
/*
JSONError: Trailing comma in object in foo.json:3:1
}
^
*/
// You can also add the filename at a later point
try {
parseJson(json);
} catch (err) {
err.fileName = 'foo.json';
throw err;
}
/*
JSONError: Trailing comma in object in foo.json:3:1
}
^
*/
```
## API
### parseJson(input, [reviver], [filename])
#### input
Type: `string`
#### reviver
Type: `Function`
Prescribes how the value originally produced by parsing is transformed, before being returned. See [`JSON.parse` docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse#Using_the_reviver_parameter
) for more.
#### filename
Type: `string`
Filename displayed in the error message.
## License
MIT © [Sindre Sorhus](https://sindresorhus.com)

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@@ -0,0 +1,668 @@
# Change Log
This project adheres to [Semantic Versioning](http://semver.org/).
## 7.0.35
* Add migration guide link to PostCSS 8 error text.
## 7.0.34
* Fix compatibility with `postcss-scss` 2.
## 7.0.33
* Add error message for PostCSS 8 plugins.
## 7.0.32
* Fix error message (by @admosity).
## 7.0.31
* Use only the latest source map annotation (by Emmanouil Zoumpoulakis).
## 7.0.30
* Fix TypeScript definition (by Natalie Weizenbaum).
## 7.0.29
* Update `Processor#version`.
## 7.0.28
* Fix TypeScript definition (by Natalie Weizenbaum).
## 7.0.27
* Fix TypeScript definition (by Natalie Weizenbaum).
## 7.0.26
* Fix TypeScript definition (by Natalie Weizenbaum).
## 7.0.25
* Fix absolute path support for Windows (by Tom Raviv).
## 7.0.24
* Fix TypeScript definition (by Keith Cirkel).
## 7.0.23
* Update `Processor#version`.
## 7.0.22
* Add funding link for `npm fund`.
## 7.0.21
* Revert passing `nodes` property to node constructor.
## 7.0.20
* Allow to pass PostCSSs nodes in `nodes` property to node constructor.
## 7.0.19
* Fix passing `nodes` property to node constructor.
## 7.0.18
* Fix TypeScript type definitions (by Jan Buschtöns).
## 7.0.17
* Fix TypeScript type definitions (by Bob Matcuk and Jan Buschtöns).
## 7.0.16
* Revert Custom Properties fix until PostCSS 8.0.
## 7.0.15
* Fix Custom Properties support (by Ivan Solovev).
## 7.0.14
* Fix tokenizer for `postcss-less` (by Matt Lyons).
## 7.0.13
* Fix parsing regression in 7.0.12 for comments between property and value.
## 7.0.12
* Fix parsing broken CSS with two words in declaration property.
## 7.0.11
* Fix source maps on declaration semicolon (by Niklas Mischkulnig).
## 7.0.10
* Fix source maps (by Niklas Mischkulnig).
## 7.0.9
* Increase stringifing performance for non-raws AST.
## 7.0.8
* Fix TypeScript definitions (by Ankur Oberoi).
* Use `support-colors` 6.0.
## 7.0.7
* Extend `Error` in `CssSyntaxError`.
## 7.0.6
* Fix parsing files with BOM (by Veniamin Krol).
## 7.0.5
* Reduce npm package size (by Gilad Peleg).
## 7.0.4
* Fix safe parser regression.
## 7.0.3
* Fix tokenizer extendability (by Andrew Powell).
* Reduce npm package size.
## 7.0.2
* Fix warning text (by Rui Pedro M Lima).
## 7.0.1
* Fix JSDoc (by Steven Lambert).
## 7.0 “President Amy”
* Remove Node.js 9 and Node.js 4 support.
* Remove IE and “dead” browsers support for client-side Babel transpiling.
* Add CSS position on error happened inside `walk()` (by Nikhil Gaba).
* Add `LazyResult#finally` (by Igor Kamyshev).
* Add warning on calling PostCSS without plugins and syntax options.
* Reduce client-side size.
## 6.0.23
* Fix parsing nested at-rules without semicolon, params, and spaces.
* Fix docs (by Kevin Schiffer and Pat Cavit).
## 6.0.22
* Fix `Node#prev` and `Node#next` on missed parent.
## 6.0.21
* Rename Chinese docs to fix `yarnpkg.com` issue.
## 6.0.20
* Better error message on `null` as input CSS.
## 6.0.19
* Fix TypeScript definitions for source maps (by Oleh Kuchuk).
* Fix `source` field in TypeScript definitions (by Sylvain Pollet-Villard).
## 6.0.18
* Use primitive object in TypeScript definitions (by Sylvain Pollet-Villard).
## 6.0.17
* Fix parsing comment in selector between word tokens (by Oleh Kuchuk).
## 6.0.16
* Fix warning text (by Michael Keller).
## 6.0.15
* Add warning about missed `from` option on `process().then()` call.
* Add IE 10 support.
## 6.0.14
* Fix TypeScript definitions (by Jed Mao).
## 6.0.13
* Fix TypeScript definitions for case of multiple PostCSS versions
in `node_modules` (by Chris Eppstein).
* Use `source-map` 0.6.
## 6.0.12
* Dont copy `*` hack to declaration indent.
## 6.0.11
* Add upper case `!IMPORTANT` support.
## 6.0.10
* Reduce PostCSS size in webpack bundle.
## 6.0.9
* Improve error message for plugin with old PostCSS (by Igor Adamenko).
## 6.0.8
* Fix Node.js 4.2.2 support.
## 6.0.7
* Fix base64 decoding for old Node.js and browser.
## 6.0.6
* Fix `end` position in at-rule without semicolon (by Oleh Kuchuk).
## 6.0.5
* Move Babel config from `package.json` for `node_modules` compiling cases.
## 6.0.4
* Fix parsing `;;` after rules.
* Use Chalk 2.0.
## 6.0.3
* Fix escape sequences parsing (by Oleh Kuchuk).
* Added ability to force disable colors with an environment variable.
* Improved color detection of some terminal apps.
## 6.0.2
* Keep `raws.before` on moving `Root` children to new `Root`.
## 6.0.1
* Fix parser extensibility to use it in Safe Parser.
## 6.0 “Marquis Orias”
* Remove node.js 0.12 support.
* Remove deprecated method from PostCSS 4.
* Insert methods remove child from previous parent, instead of closing.
* Insert methods and cloning doesnt clean `raws` anymore.
* Methods `moveTo`, `moveAfter`, `moveBefore` were deprecated.
* Options was changed in `Plugin#process(css, processOptions, pluginOptions)`.
* Add stream parser to reduce memory usage (by Oleh Kuchuk).
* Add `before()`/`after()` shortcuts for `node.parent.insertBefore(node, x)`.
* Add `Rule#raws.ownSemicolon` for semicolon after templates for `@apply`.
* Use `babel-preset-env` to compile npm package.
* Remove `js-base64` from dependencies (by Roman Dvornov).
* Fix error message on single `:` in CSS.
* Move tests to Jest.
* Clean up test (by Gabriel Kalani).
## 5.2.18
* Fix TypeScript definitions for case of multiple PostCSS versions
in `node_modules` (by Chris Eppstein).
## 5.2.17
* Add `postcss-sass` suggestion to syntax error on `.sass` input.
## 5.2.16
* Better error on wrong argument in node constructor.
## 5.2.15
* Fix TypeScript definitions (by bumbleblym).
## 5.2.14
* Fix browser bundle building in webpack (by janschoenherr).
## 5.2.13
* Do not add comment to important raws.
* Fix JSDoc (by Dmitry Semigradsky).
## 5.2.12
* Fix typo in deprecation message (by Garet McKinley).
## 5.2.11
* Fix TypeScript definitions (by Jed Mao).
## 5.2.10
* Fix TypeScript definitions (by Jed Mao).
## 5.2.9
* Update TypeScript definitions (by Jed Mao).
## 5.2.8
* Fix error message (by Ben Briggs).
## 5.2.7
* Better error message on syntax object in plugins list.
## 5.2.6
* Fix `postcss.vendor` for values with spaces (by 刘祺).
## 5.2.5
* Better error message on unclosed string (by Ben Briggs).
## 5.2.4
* Improve terminal CSS syntax highlight (by Simon Lydell).
## 5.2.3
* Better color highlight in syntax error code frame.
* Fix color highlight support in old systems.
## 5.2.2
* Update `Processor#version`.
## 5.2.1
* Fix source map path for CSS without `from` option (by Michele Locati).
## 5.2 “Duke Vapula”
* Add syntax highlight to code frame in syntax error (by Andrey Popp).
* Use Babel code frame style and size in syntax error.
* Add `[` and `]` tokens to parse `[attr=;] {}` correctly.
* Add `ignoreErrors` options to tokenizer (by Andrey Popp).
* Fix error position on tab indent (by Simon Lydell).
## 5.1.2
* Suggests SCSS/Less parsers on parse errors depends on file extension.
## 5.1.1
* Fix TypeScript definitions (by Efremov Alexey).
## 5.1 “King and President Zagan”
* Add URI in source map support (by Mark Finger).
* Add `map.from` option (by Mark Finger).
* Add `<no source>` mappings for nodes without source (by Bogdan Chadkin).
* Add function value support to `map.prev` option (by Chris Montoro).
* Add declaration value type check in shortcut creating (by 刘祺).
* `Result#warn` now returns new created warning.
* Dont call plugin creator in `postcss.plugin` call.
* Add source maps to PostCSS ES5 build.
* Add JSDoc to PostCSS classes.
* Clean npm package from unnecessary docs.
## 5.0.21
* Fix support with input source mao with `utf8` encoding name.
## 5.0.20
* Fix between raw value parsing (by David Clark).
* Update TypeScript definitions (by Jed Mao).
* Clean fake node.source after `append(string)`.
## 5.0.19
* Fix indent-based syntaxes support.
## 5.0.18
* Parse new lines according W3C CSS syntax specification.
## 5.0.17
* Fix options argument in `Node#warn` (by Ben Briggs).
* Fix TypeScript definitions (by Jed Mao).
## 5.0.16
* Fix CSS syntax error position on unclosed quotes.
## 5.0.15
* Fix `Node#clone()` on `null` value somewhere in node.
## 5.0.14
* Allow to use PostCSS in webpack bundle without JSON loader.
## 5.0.13
* Fix `index` and `word` options in `Warning#toString` (by Bogdan Chadkin).
* Fix input source content loading in errors.
* Fix map options on using `LazyResult` as input CSS.
* 100% test coverage.
* Use Babel 6.
## 5.0.12
* Allow passing a previous map with no mappings (by Andreas Lind).
## 5.0.11
* Increase plugins performance by 1.5 times.
## 5.0.10
* Fix warning from nodes without source.
## 5.0.9
* Fix source map type detection (by @asan).
## 5.0.8
* Fixed a missed step in `5.0.7` that caused the module to be published as
ES6 code.
## 5.0.7
* PostCSS now requires that node 0.12 is installed via the engines property
in package.json (by Howard Zuo).
## 5.0.6
* Fix parsing nested at-rule without semicolon (by Matt Drake).
* Trim `Declaration#value` (by Bogdan Chadkin).
## 5.0.5
* Fix multi-tokens property parsing (by Matt Drake).
## 5.0.4
* Fix start position in `Root#source`.
* Fix source map annotation, when CSS uses `\r\n` (by Mohammad Younes).
## 5.0.3
* Fix `url()` parsing.
* Fix using `selectors` in `Rule` constructor.
* Add start source to `Root` node.
## 5.0.2
* Fix `remove(index)` to be compatible with 4.x plugin.
## 5.0.1
* Fix PostCSS 4.x plugins compatibility.
* Fix type definition loading (by Jed Mao).
## 5.0 “President Valac”
* Remove `safe` option. Move Safe Parser to separate project.
* `Node#toString` does not include `before` for root nodes.
* Remove plugin returning `Root` API.
* Remove Promise polyfill for node.js 0.10.
* Deprecate `eachInside`, `eachDecl`, `eachRule`, `eachAtRule` and `eachComment`
in favor of `walk`, `walkDecls`, `walkRules`, `walkAtRules` and `walkComments`
(by Jed Mao).
* Deprecate `Container#remove` and `Node#removeSelf`
in favor of `Container#removeChild` and `Node#remove` (by Ben Briggs).
* Deprecate `Node#replace` in favor of `replaceWith` (by Ben Briggs).
* Deprecate raw properties in favor of `Node#raws` object.
* Deprecate `Node#style` in favor of `raw`.
* Deprecate `CssSyntaxError#generated` in favor of `input`.
* Deprecate `Node#cleanStyles` in favor of `cleanRaws`.
* Deprecate `Root#prevMap` in favor of `Root.source.input.map`.
* Add `syntax`, `parser` and `stringifier` options for Custom Syntaxes.
* Add stringifier option to `Node#toString`.
* Add `Result#content` alias for non-CSS syntaxes.
* Add `plugin.process(css)` shortcut to every plugin function (by Ben Briggs).
* Add multiple nodes support to insert methods (by Jonathan Neal).
* Add `Node#warn` shortcut (by Ben Briggs).
* Add `word` and `index` options to errors and warnings (by David Clark).
* Add `line`, `column` properties to `Warning`.
* Use `supports-color` library to detect color support in error output.
* Add type definitions for TypeScript plugin developers (by Jed Mao).
* `Rule#selectors` setter detects separators.
* Add `postcss.stringify` method.
* Throw descriptive errors for incorrectly formatted plugins.
* Add docs to npm release.
* Fix `url()` parsing.
* Fix Windows support (by Jed Mao).
## 4.1.16
* Fix errors without stack trace.
## 4.1.15
* Allow asynchronous plugins to change processor plugins list (by Ben Briggs).
## 4.1.14
* Fix for plugins packs defined by `postcss.plugin`.
## 4.1.13
* Fix input inlined source maps with UTF-8 encoding.
## 4.1.12
* Update Promise polyfill.
## 4.1.11
* Fix error message on wrong plugin format.
## 4.1.10
* Fix Promise behavior on sync plugin errors.
* Automatically fill `plugin` field in `CssSyntaxError`.
* Fix warning message (by Ben Briggs).
## 4.1.9
* Speed up `node.clone()`.
## 4.1.8
* Accepts `Processor` instance in `postcss()` constructor too.
## 4.1.7
* Speed up `postcss.list` (by Bogdan Chadkin).
## 4.1.6
* Fix Promise behavior on parsing error.
## 4.1.5
* Parse at-words in declaration values.
## 4.1.4
* Fix Promise polyfill dependency (by Anton Yakushev and Matija Marohnić).
## 4.1.3
* Add Promise polyfill for node.js 0.10 and IE.
## 4.1.2
* List helpers can be accessed independently `var space = postcss.list.space`.
## 4.1.1
* Show deprecated message only once.
## 4.1 “Marquis Andras”
* Asynchronous plugin support.
* Add warnings from plugins and `Result#messages`.
* Add `postcss.plugin()` to create plugins with a standard API.
* Insert nodes by CSS string.
* Show version warning message on error from an outdated plugin.
* Send `Result` instance to plugins as the second argument.
* Add `CssSyntaxError#plugin`.
* Add `CssSyntaxError#showSourceCode()`.
* Add `postcss.list` and `postcss.vendor` aliases.
* Add `Processor#version`.
* Parse wrong closing bracket.
* Parse `!important` statement with spaces and comments inside (by Ben Briggs).
* Throw an error on declaration without `prop` or `value` (by Philip Peterson).
* Fix source map mappings position.
* Add indexed source map support.
* Always set `error.generated`.
* Clean all source map annotation comments.
## 4.0.6
* Remove `babel` from released package dependencies (by Andres Suarez).
## 4.0.5
* Fix error message on double colon in declaration.
## 4.0.4
* Fix indent detection in some rare cases.
## 4.0.3
* Faster API with 6to5 Loose mode.
* Fix indexed source maps support.
## 4.0.2
* Do not copy IE hacks to code style.
## 4.0.1
* Add `source.input` to `Root` too.
## 4.0 “Duke Flauros”
* Rename `Container#childs` to `nodes`.
* Rename `PostCSS#processors` to `plugins`.
* Add `Node#replaceValues()` method.
* Add `Node#moveTo()`, `moveBefore()` and `moveAfter()` methods.
* Add `Node#cloneBefore()` and `cloneAfter()` shortcuts.
* Add `Node#next()`, `prev()` and `root()` shortcuts.
* Add `Node#replaceWith()` method.
* Add `Node#error()` method.
* Add `Container#removeAll()` method.
* Add filter argument to `eachDecl()` and `eachAtRule()`.
* Add `Node#source.input` and move `source.file` or `source.id` to `input`.
* Change code indent, when node was moved.
* Better fix code style on `Rule`, `AtRule` and `Comment` nodes changes.
* Allow to create rules and at-rules by hash shortcut in append methods.
* Add class name to CSS syntax error output.
## 3.0.7
* Fix IE filter parsing with multiple commands.
* Safer way to consume PostCSS object as plugin (by Maxime Thirouin).
## 3.0.6
* Fix missing semicolon when comment comes after last declaration.
* Fix Safe Mode declaration parsing on unclosed blocks.
## 3.0.5
* Fix parser to support difficult cases with backslash escape and brackets.
* Add `CssSyntaxError#stack` (by Maxime Thirouin).
## 3.0.4
* Fix Safe Mode on unknown word before declaration.
## 3.0.3
* Increase tokenizer speed (by Roman Dvornov).
## 3.0.2
* Fix empty comment parsing.
* Fix `Root#normalize` in some inserts.
## 3.0.1
* Fix Rhino JS runtime support.
* Typo in deprecated warning (by Maxime Thirouin).
## 3.0 “Marquis Andrealphus”
* New parser, which become the fastest ever CSS parser written in JavaScript.
* Parser can now parse declarations and rules in one parent (like in `@page`)
and nested declarations for plugins like `postcss-nested`.
* Child nodes array is now in `childs` property, instead of `decls` and `rules`.
* `map.inline` and `map.sourcesContent` options are now `true` by default.
* Fix iterators (`each`, `insertAfter`) on children array changes.
* Use previous source map to show origin source of CSS syntax error.
* Use 6to5 ES6 compiler, instead of ES6 Transpiler.
* Use code style for manually added rules from existing rules.
* Use `from` option from previous source map `file` field.
* Set `to` value to `from` if `to` option is missing.
* Use better node source name when missing `from` option.
* Show a syntax error when `;` is missed between declarations.
* Allow to pass `PostCSS` instance or list of plugins to `use()` method.
* Allow to pass `Result` instance to `process()` method.
* Trim Unicode BOM on source maps parsing.
* Parse at-rules without spaces like `@import"file"`.
* Better previous `sourceMappingURL` annotation comment cleaning.
* Do not remove previous `sourceMappingURL` comment on `map.annotation: false`.
* Parse nameless at-rules in Safe Mode.
* Fix source map generation for nodes without source.
* Fix next child `before` if `Root` first child got removed.
## 2.2.6
* Fix map generation for nodes without source (by Josiah Savary).
## 2.2.5
* Fix source map with BOM marker support (by Mohammad Younes).
* Fix source map paths (by Mohammad Younes).
## 2.2.4
* Fix `prepend()` on empty `Root`.
## 2.2.3
* Allow to use object shortcut in `use()` with functions like `autoprefixer`.
## 2.2.2
* Add shortcut to set processors in `use()` via object with `.postcss` property.
## 2.2.1
* Send `opts` from `Processor#process(css, opts)` to processors.
## 2.2 “Marquis Cimeies”
* Use GNU style syntax error messages.
* Add `Node#replace` method.
* Add `CssSyntaxError#reason` property.
## 2.1.2
* Fix UTF-8 support in inline source map.
* Fix source map `sourcesContent` if there is no `from` and `to` options.
## 2.1.1
* Allow to miss `to` and `from` options for inline source maps.
* Add `Node#source.id` if file name is unknown.
* Better detect splitter between rules in CSS concatenation tools.
* Automatically clone node in insert methods.
## 2.1 “King Amdusias”
* Change Traceur ES6 compiler to ES6 Transpiler.
* Show broken CSS line in syntax error.
## 2.0 “King Belial”
* Project was rewritten from CoffeeScript to ES6.
* Add Safe Mode to works with live input or with hacks from legacy code.
* More safer parser to pass all hacks from Browserhacks.com.
* Use real properties instead of magic getter/setter for raw properties.
## 1.0 “Marquis Decarabia”
* Save previous source map for each node to support CSS concatenation
with multiple previous maps.
* Add `map.sourcesContent` option to add origin content to `sourcesContent`
inside map.
* Allow to set different place of output map in annotation comment.
* Allow to use arrays and `Root` in `Container#append` and same methods.
* Add `Root#prevMap` with information about previous map.
* Allow to use latest PostCSS from GitHub by npm.
* `Result` now is lazy and it will generate output CSS only if you use `css`
or `map` property.
* Use separated `map.prev` option to set previous map.
* Rename `inlineMap` option to `map.inline`.
* Rename `mapAnnotation` option to `map.annotation`.
* `Result#map` now return `SourceMapGenerator` object, instead of string.
* Run previous map autodetect only if input CSS contains annotation comment.
* Add `map: 'inline'` shortcut for `map: { inline: true }` option.
* `Node#source.file` now will contains absolute path.
* Clean `Declaration#between` style on node clone.
## 0.3.5
* Allow to use `Root` or `Result` as first argument in `process()`.
* Save parsed AST to `Result#root`.
## 0.3.4
* Better space symbol detect to read UTF-8 BOM correctly.
## 0.3.3
* Remove source map hacks by using new Mozillas `source-map` (by Simon Lydell).
## 0.3.2
* Add URI encoding support for inline source maps.
## 0.3.1
* Fix relative paths from previous source map.
* Safer space split in `Rule#selectors` (by Simon Lydell).
## 0.3 “Prince Seere”
* Add `Comment` node for comments between declarations or rules.
* Add source map annotation comment to output CSS.
* Allow to inline source map to annotation comment by data:uri.
* Fix source maps on Windows.
* Fix source maps for subdirectory (by Dmitry Nikitenko and Simon Lydell).
* Autodetect previous source map.
* Add `first` and `last` shortcuts to container nodes.
* Parse `!important` to separated property in `Declaration`.
* Allow to break iteration by returning `false`.
* Copy code style to new nodes.
* Add `eachInside` method to recursively iterate all nodes.
* Add `selectors` shortcut to get selectors array.
* Add `toResult` method to `Rule` to simplify work with several input files.
* Clean declarations `value`, rules `selector` and at-rules `params`
by storing spaces in `between` property.
## 0.2 “Duke Dantalion”
* Add source map support.
* Add shortcuts to create nodes.
* Method `process()` now returns object with `css` and `map` keys.
* Origin CSS file option was renamed from `file` to `from`.
* Rename `Node#remove()` method to `removeSelf()` to fix name conflict.
* Node source was moved to `source` property with origin file
and node end position.
* You can set own CSS generate function.
## 0.1 “Count Andromalius”
* Initial release.

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The MIT License (MIT)
Copyright 2013 Andrey Sitnik <andrey@sitnik.ru>
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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@@ -0,0 +1,491 @@
# PostCSS [![Gitter][chat-img]][chat]
<img align="right" width="95" height="95"
alt="Philosophers stone, logo of PostCSS"
src="http://postcss.github.io/postcss/logo.svg">
[chat-img]: https://img.shields.io/badge/Gitter-Join_the_PostCSS_chat-brightgreen.svg
[chat]: https://gitter.im/postcss/postcss
PostCSS is a tool for transforming styles with JS plugins.
These plugins can lint your CSS, support variables and mixins,
transpile future CSS syntax, inline images, and more.
PostCSS is used by industry leaders including Wikipedia, Twitter, Alibaba,
and JetBrains. The [Autoprefixer] PostCSS plugin is one of the most popular
CSS processors.
PostCSS takes a CSS file and provides an API to analyze and modify its rules
(by transforming them into an [Abstract Syntax Tree]).
This API can then be used by [plugins] to do a lot of useful things,
e.g. to find errors automatically insert vendor prefixes.
**Support / Discussion:** [Gitter](https://gitter.im/postcss/postcss)<br>
**Twitter account:** [@postcss](https://twitter.com/postcss)<br>
**VK.com page:** [postcss](https://vk.com/postcss)<br>
**中文翻译**: [`README-cn.md`](./README-cn.md)
For PostCSS commercial support (consulting, improving the front-end culture
of your company, PostCSS plugins), contact [Evil Martians]
at <surrender@evilmartians.com>.
[Abstract Syntax Tree]: https://en.wikipedia.org/wiki/Abstract_syntax_tree
[Evil Martians]: https://evilmartians.com/?utm_source=postcss
[Autoprefixer]: https://github.com/postcss/autoprefixer
[plugins]: https://github.com/postcss/postcss#plugins
<a href="https://evilmartians.com/?utm_source=postcss">
<img src="https://evilmartians.com/badges/sponsored-by-evil-martians.svg"
alt="Sponsored by Evil Martians" width="236" height="54">
</a>
## Sponsorship
PostCSS needs your support. We are accepting donations
[at Open Collective](https://opencollective.com/postcss/).
<a href="https://tailwindcss.com/">
<img src="https://refactoringui.nyc3.cdn.digitaloceanspaces.com/tailwind-logo.svg"
alt="Sponsored by Tailwind CSS" width="273" height="64">
</a>
## Plugins
Currently, PostCSS has more than 200 plugins. You can find all of the plugins
in the [plugins list] or in the [searchable catalog]. Below is a list
of our favorite plugins — the best demonstrations of what can be built
on top of PostCSS.
If you have any new ideas, [PostCSS plugin development] is really easy.
[searchable catalog]: http://postcss.parts
[plugins list]: https://github.com/postcss/postcss/blob/master/docs/plugins.md
### Solve Global CSS Problem
* [`postcss-use`] allows you to explicitly set PostCSS plugins within CSS
and execute them only for the current file.
* [`postcss-modules`] and [`react-css-modules`] automatically isolate
selectors within components.
* [`postcss-autoreset`] is an alternative to using a global reset
that is better for isolatable components.
* [`postcss-initial`] adds `all: initial` support, which resets
all inherited styles.
* [`cq-prolyfill`] adds container query support, allowing styles that respond
to the width of the parent.
### Use Future CSS, Today
* [`autoprefixer`] adds vendor prefixes, using data from Can I Use.
* [`postcss-preset-env`] allows you to use future CSS features today.
### Better CSS Readability
* [`precss`] contains plugins for Sass-like features, like variables, nesting,
and mixins.
* [`postcss-sorting`] sorts the content of rules and at-rules.
* [`postcss-utilities`] includes the most commonly used shortcuts and helpers.
* [`short`] adds and extends numerous shorthand properties.
### Images and Fonts
* [`postcss-assets`] inserts image dimensions and inlines files.
* [`postcss-sprites`] generates image sprites.
* [`font-magician`] generates all the `@font-face` rules needed in CSS.
* [`postcss-inline-svg`] allows you to inline SVG and customize its styles.
* [`postcss-write-svg`] allows you to write simple SVG directly in your CSS.
### Linters
* [`stylelint`] is a modular stylesheet linter.
* [`stylefmt`] is a tool that automatically formats CSS
according `stylelint` rules.
* [`doiuse`] lints CSS for browser support, using data from Can I Use.
* [`colorguard`] helps you maintain a consistent color palette.
### Other
* [`postcss-rtl`] combines both-directional (left-to-right and right-to-left) styles in one CSS file.
* [`cssnano`] is a modular CSS minifier.
* [`lost`] is a feature-rich `calc()` grid system.
* [`rtlcss`] mirrors styles for right-to-left locales.
[PostCSS plugin development]: https://github.com/postcss/postcss/blob/master/docs/writing-a-plugin.md
[`postcss-inline-svg`]: https://github.com/TrySound/postcss-inline-svg
[`postcss-preset-env`]: https://github.com/jonathantneal/postcss-preset-env
[`react-css-modules`]: https://github.com/gajus/react-css-modules
[`postcss-autoreset`]: https://github.com/maximkoretskiy/postcss-autoreset
[`postcss-write-svg`]: https://github.com/jonathantneal/postcss-write-svg
[`postcss-utilities`]: https://github.com/ismamz/postcss-utilities
[`postcss-initial`]: https://github.com/maximkoretskiy/postcss-initial
[`postcss-sprites`]: https://github.com/2createStudio/postcss-sprites
[`postcss-modules`]: https://github.com/outpunk/postcss-modules
[`postcss-sorting`]: https://github.com/hudochenkov/postcss-sorting
[`postcss-assets`]: https://github.com/assetsjs/postcss-assets
[`font-magician`]: https://github.com/jonathantneal/postcss-font-magician
[`autoprefixer`]: https://github.com/postcss/autoprefixer
[`cq-prolyfill`]: https://github.com/ausi/cq-prolyfill
[`postcss-rtl`]: https://github.com/vkalinichev/postcss-rtl
[`postcss-use`]: https://github.com/postcss/postcss-use
[`css-modules`]: https://github.com/css-modules/css-modules
[`colorguard`]: https://github.com/SlexAxton/css-colorguard
[`stylelint`]: https://github.com/stylelint/stylelint
[`stylefmt`]: https://github.com/morishitter/stylefmt
[`cssnano`]: http://cssnano.co
[`precss`]: https://github.com/jonathantneal/precss
[`doiuse`]: https://github.com/anandthakker/doiuse
[`rtlcss`]: https://github.com/MohammadYounes/rtlcss
[`short`]: https://github.com/jonathantneal/postcss-short
[`lost`]: https://github.com/peterramsing/lost
## Syntaxes
PostCSS can transform styles in any syntax, not just CSS.
If there is not yet support for your favorite syntax,
you can write a parser and/or stringifier to extend PostCSS.
* [`sugarss`] is a indent-based syntax like Sass or Stylus.
* [`postcss-syntax`] switch syntax automatically by file extensions.
* [`postcss-html`] parsing styles in `<style>` tags of HTML-like files.
* [`postcss-markdown`] parsing styles in code blocks of Markdown files.
* [`postcss-jsx`] parsing CSS in template / object literals of source files.
* [`postcss-styled`] parsing CSS in template literals of source files.
* [`postcss-scss`] allows you to work with SCSS
*(but does not compile SCSS to CSS)*.
* [`postcss-sass`] allows you to work with Sass
*(but does not compile Sass to CSS)*.
* [`postcss-less`] allows you to work with Less
*(but does not compile LESS to CSS)*.
* [`postcss-less-engine`] allows you to work with Less
*(and DOES compile LESS to CSS using true Less.js evaluation)*.
* [`postcss-js`] allows you to write styles in JS or transform
React Inline Styles, Radium or JSS.
* [`postcss-safe-parser`] finds and fixes CSS syntax errors.
* [`midas`] converts a CSS string to highlighted HTML.
[`postcss-less-engine`]: https://github.com/Crunch/postcss-less
[`postcss-safe-parser`]: https://github.com/postcss/postcss-safe-parser
[`postcss-syntax`]: https://github.com/gucong3000/postcss-syntax
[`postcss-html`]: https://github.com/gucong3000/postcss-html
[`postcss-markdown`]: https://github.com/gucong3000/postcss-markdown
[`postcss-jsx`]: https://github.com/gucong3000/postcss-jsx
[`postcss-styled`]: https://github.com/gucong3000/postcss-styled
[`postcss-scss`]: https://github.com/postcss/postcss-scss
[`postcss-sass`]: https://github.com/AleshaOleg/postcss-sass
[`postcss-less`]: https://github.com/webschik/postcss-less
[`postcss-js`]: https://github.com/postcss/postcss-js
[`sugarss`]: https://github.com/postcss/sugarss
[`midas`]: https://github.com/ben-eb/midas
## Articles
* [Some things you may think about PostCSS… and you might be wrong](http://julian.io/some-things-you-may-think-about-postcss-and-you-might-be-wrong)
* [What PostCSS Really Is; What It Really Does](http://davidtheclark.com/its-time-for-everyone-to-learn-about-postcss)
* [PostCSS Guides](http://webdesign.tutsplus.com/series/postcss-deep-dive--cms-889)
More articles and videos you can find on [awesome-postcss](https://github.com/jjaderg/awesome-postcss) list.
## Books
* [Mastering PostCSS for Web Design](https://www.packtpub.com/web-development/mastering-postcss-web-design) by Alex Libby, Packt. (June 2016)
## Usage
You can start using PostCSS in just two steps:
1. Find and add PostCSS extensions for your build tool.
2. [Select plugins] and add them to your PostCSS process.
[Select plugins]: http://postcss.parts
### CSS-in-JS
The best way to use PostCSS with CSS-in-JS is [`astroturf`].
Add its loader to your `webpack.config.js`:
```js
module.exports = {
module: {
rules: [
{
test: /\.css$/,
use: ['style-loader', 'postcss-loader'],
},
{
test: /\.jsx?$/,
use: ['babel-loader', 'astroturf/loader'],
}
]
}
}
```
Then create `postcss.config.js`:
```js
module.exports = {
plugins: [
require('autoprefixer'),
require('postcss-nested')
]
}
```
[`astroturf`]: https://github.com/4Catalyzer/astroturf
### Parcel
[Parcel] has built-in PostCSS support. It already uses Autoprefixer
and cssnano. If you want to change plugins, create `postcss.config.js`
in projects root:
```js
module.exports = {
plugins: [
require('autoprefixer'),
require('postcss-nested')
]
}
```
Parcel will even automatically install these plugins for you.
> Please, be aware of [the several issues in Version 1](https://github.com/parcel-bundler/parcel/labels/CSS%20Preprocessing). Notice, [Version 2](https://github.com/parcel-bundler/parcel/projects/5) may resolve the issues via [issue #2157](https://github.com/parcel-bundler/parcel/issues/2157).
[Parcel]: https://parceljs.org
### Webpack
Use [`postcss-loader`] in `webpack.config.js`:
```js
module.exports = {
module: {
rules: [
{
test: /\.css$/,
exclude: /node_modules/,
use: [
{
loader: 'style-loader',
},
{
loader: 'css-loader',
options: {
importLoaders: 1,
}
},
{
loader: 'postcss-loader'
}
]
}
]
}
}
```
Then create `postcss.config.js`:
```js
module.exports = {
plugins: [
require('precss'),
require('autoprefixer')
]
}
```
[`postcss-loader`]: https://github.com/postcss/postcss-loader
### Gulp
Use [`gulp-postcss`] and [`gulp-sourcemaps`].
```js
gulp.task('css', () => {
const postcss = require('gulp-postcss')
const sourcemaps = require('gulp-sourcemaps')
return gulp.src('src/**/*.css')
.pipe( sourcemaps.init() )
.pipe( postcss([ require('precss'), require('autoprefixer') ]) )
.pipe( sourcemaps.write('.') )
.pipe( gulp.dest('build/') )
})
```
[`gulp-sourcemaps`]: https://github.com/floridoo/gulp-sourcemaps
[`gulp-postcss`]: https://github.com/postcss/gulp-postcss
### npm run / CLI
To use PostCSS from your command-line interface or with npm scripts
there is [`postcss-cli`].
```sh
postcss --use autoprefixer -c options.json -o main.css css/*.css
```
[`postcss-cli`]: https://github.com/postcss/postcss-cli
### Browser
If you want to compile CSS string in browser (for instance, in live edit
tools like CodePen), just use [Browserify] or [webpack]. They will pack
PostCSS and plugins files into a single file.
To apply PostCSS plugins to React Inline Styles, JSS, Radium
and other [CSS-in-JS], you can use [`postcss-js`] and transforms style objects.
```js
var postcss = require('postcss-js')
var prefixer = postcss.sync([ require('autoprefixer') ])
prefixer({ display: 'flex' }) //=> { display: ['-webkit-box', '-webkit-flex', '-ms-flexbox', 'flex'] }
```
[`postcss-js`]: https://github.com/postcss/postcss-js
[Browserify]: http://browserify.org/
[CSS-in-JS]: https://github.com/MicheleBertoli/css-in-js
[webpack]: https://webpack.github.io/
### Runners
* **Grunt**: [`grunt-postcss`](https://github.com/nDmitry/grunt-postcss)
* **HTML**: [`posthtml-postcss`](https://github.com/posthtml/posthtml-postcss)
* **Stylus**: [`poststylus`](https://github.com/seaneking/poststylus)
* **Rollup**: [`rollup-plugin-postcss`](https://github.com/egoist/rollup-plugin-postcss)
* **Brunch**: [`postcss-brunch`](https://github.com/brunch/postcss-brunch)
* **Broccoli**: [`broccoli-postcss`](https://github.com/jeffjewiss/broccoli-postcss)
* **Meteor**: [`postcss`](https://atmospherejs.com/juliancwirko/postcss)
* **ENB**: [`enb-postcss`](https://github.com/awinogradov/enb-postcss)
* **Taskr**: [`taskr-postcss`](https://github.com/lukeed/taskr/tree/master/packages/postcss)
* **Start**: [`start-postcss`](https://github.com/start-runner/postcss)
* **Connect/Express**: [`postcss-middleware`](https://github.com/jedmao/postcss-middleware)
### JS API
For other environments, you can use the JS API:
```js
const autoprefixer = require('autoprefixer')
const postcss = require('postcss')
const precss = require('precss')
const fs = require('fs')
fs.readFile('src/app.css', (err, css) => {
postcss([precss, autoprefixer])
.process(css, { from: 'src/app.css', to: 'dest/app.css' })
.then(result => {
fs.writeFile('dest/app.css', result.css, () => true)
if ( result.map ) {
fs.writeFile('dest/app.css.map', result.map, () => true)
}
})
})
```
Read the [PostCSS API documentation] for more details about the JS API.
All PostCSS runners should pass [PostCSS Runner Guidelines].
[PostCSS Runner Guidelines]: https://github.com/postcss/postcss/blob/master/docs/guidelines/runner.md
[PostCSS API documentation]: http://api.postcss.org/postcss.html
### Options
Most PostCSS runners accept two parameters:
* An array of plugins.
* An object of options.
Common options:
* `syntax`: an object providing a syntax parser and a stringifier.
* `parser`: a special syntax parser (for example, [SCSS]).
* `stringifier`: a special syntax output generator (for example, [Midas]).
* `map`: [source map options].
* `from`: the input file name (most runners set it automatically).
* `to`: the output file name (most runners set it automatically).
[source map options]: https://github.com/postcss/postcss/blob/master/docs/source-maps.md
[Midas]: https://github.com/ben-eb/midas
[SCSS]: https://github.com/postcss/postcss-scss
### Treat Warnings as Errors
In some situations it might be helpful to fail the build on any warning
from PostCSS or one of its plugins. This guarantees that no warnings
go unnoticed, and helps to avoid bugs. While there is no option to enable
treating warnings as errors, it can easily be done
by adding `postcss-fail-on-warn` plugin in the end of PostCSS plugins:
```js
module.exports = {
plugins: [
require('autoprefixer'),
require('postcss-fail-on-warn')
]
}
```
## Contributing
[Our contributing guidelines](./CONTRIBUTING.md) will help you
with making pull request to this project.
## Editors & IDE Integration
### VS Code
* [`csstools.postcss`] adds support for PostCSS, `postcss-preset-env`
and CSS Modules.
[`csstools.postcss`]: https://marketplace.visualstudio.com/items?itemName=csstools.postcss
### Atom
* [`language-postcss`] adds PostCSS and [SugarSS] highlight.
* [`source-preview-postcss`] previews your output CSS in a separate, live pane.
[SugarSS]: https://github.com/postcss/sugarss
### Sublime Text
* [`Syntax-highlighting-for-PostCSS`] adds PostCSS highlight.
[`Syntax-highlighting-for-PostCSS`]: https://github.com/hudochenkov/Syntax-highlighting-for-PostCSS
[`source-preview-postcss`]: https://atom.io/packages/source-preview-postcss
[`language-postcss`]: https://atom.io/packages/language-postcss
### Vim
* [`postcss.vim`] adds PostCSS highlight.
[`postcss.vim`]: https://github.com/stephenway/postcss.vim
### WebStorm
WebStorm 2016.3 [has] built-in PostCSS support.
[has]: https://blog.jetbrains.com/webstorm/2016/08/webstorm-2016-3-early-access-preview/
## Security Contact
To report a security vulnerability, please use the [Tidelift security contact].
Tidelift will coordinate the fix and disclosure.
[Tidelift security contact]: https://tidelift.com/security
## For Enterprise
Available as part of the Tidelift Subscription.
The maintainers of `postcss` and thousands of other packages are working
with Tidelift to deliver commercial support and maintenance for the open source
dependencies you use to build your applications. Save time, reduce risk,
and improve code health, while paying the maintainers of the exact dependencies
you use. [Learn more.](https://tidelift.com/subscription/pkg/npm-postcss?utm_source=npm-postcss&utm_medium=referral&utm_campaign=enterprise&utm_term=repo)

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## PostCSS Architecture
General overview of the PostCSS architecture.
It can be useful for everyone who wishes to contribute to the core or develop a better understanding of the tool.
**Table of Contents**
- [Overview](#overview)
- [Workflow](#workflow)
- [Core Structures](#core-structures)
* [Tokenizer](#tokenizer--libtokenizees6-)
* [Parser](#parser--libparsees6-libparseres6-)
* [Processor](#processor--libprocessores6-)
* [Stringifier](#stringifier--libstringifyes6-libstringifieres6-)
- [API](#api-reference)
### Overview
> This section describes ideas lying behind PostCSS
Before diving deeper into the development of PostCSS let's briefly describe what is PostCSS and what is not.
**PostCSS**
- *is **NOT** a style preprocessor like `Sass` or `Less`.*
It does not define a custom syntax and semantics, it's not actually a language.
PostCSS works with CSS and can be easily integrated with the tools described above. That being said any valid CSS can be processed by PostCSS.
- *is a tool for CSS syntax transformations*
It allows you to define custom CSS like syntax that could be understandable and transformed by plugins. That being said PostCSS is not strictly about CSS spec but about syntax definition manner of CSS. In such a way you can define custom syntax constructs like at-rule, that could be very helpful for tools build around PostCSS. PostCSS plays the role of a framework for building outstanding tools for CSS manipulations.
- *is a big player in CSS ecosystem*
A Large amount of lovely tools like `Autoprefixer`, `Stylelint`, `CSSnano` were built on PostCSS ecosystem. There is a big chance that you already use it implicitly, just check your `node_modules` :smiley:
### Workflow
This is a high-level overview of the whole PostCSS workflow
<img width="300" src="https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/PostCSS_scheme.svg/512px-PostCSS_scheme.svg.png" alt="workflow">
As you can see from the diagram above, PostCSS architecture is pretty straightforward but some parts of it could be misunderstood.
You can see a part called *Parser*, this construct will be described in details later on, just for now think about it as a structure that can understand your CSS like syntax and create an object representation of it.
That being said, there are few ways to write a parser.
- *Write a single file with string to AST transformation*
This method is quite popular, for example, the [Rework analyzer](https://github.com/reworkcss/css/blob/master/lib/parse/index.js) was written in this style. But with a large code base, the code becomes hard to read and pretty slow.
- *Split it into lexical analysis/parsing steps (source string → tokens → AST)*
This is the way of how we do it in PostCSS and also the most popular one.
A lot of parsers like [`@babel/parser` (parser behind Babel)](https://github.com/babel/babel/tree/master/packages/babel-parser), [`CSSTree`](https://github.com/csstree/csstree) were written in such way.
The main reasons to separate tokenization from parsing steps are performance and abstracting complexity.
Let think about why the second way is better for our needs.
First of all, because string to tokens step takes more time than parsing step. We operate on large source string and process it char by char, this is why it is very inefficient operation in terms of performance and we should perform it only once.
But from other side tokens to AST transformation is logically more complex so with such separation we could write very fast tokenizer (but from this comes sometimes hard to read code) and easy to read (but slow) parser.
Summing it up splitting into two steps improve performance and code readability.
So now let's look more closely on structures that play the main role in PostCSS workflow.
### Core Structures
- #### Tokenizer ( [lib/tokenize.es6](https://github.com/postcss/postcss/blob/master/lib/tokenize.es6) )
Tokenizer (aka Lexer) plays important role in syntax analysis.
It accepts CSS string and returns a list of tokens.
Token is a simple structure that describes some part of syntax like `at-rule`, `comment` or `word`. It can also contain positional information for more descriptive errors.
For example, if we consider following CSS
```css
.className { color: #FFF; }
```
corresponding tokens from PostCSS will be
```js
[
["word", ".className", 1, 1, 1, 10]
["space", " "]
["{", "{", 1, 12]
["space", " "]
["word", "color", 1, 14, 1, 18]
[":", ":", 1, 19]
["space", " "]
["word", "#FFF" , 1, 21, 1, 23]
[";", ";", 1, 24]
["space", " "]
["}", "}", 1, 26]
]
```
As you can see from the example above a single token represented as a list and also `space` token doesn't have positional information.
Let's look more closely on single token like `word`. As it was said each token represented as a list and follow such pattern.
```js
const token = [
// represents token type
'word',
// represents matched word
'.className',
// This two numbers represent start position of token.
// It is optional value as we saw in the example above,
// tokens like `space` don't have such information.
// Here the first number is line number and the second one is corresponding column.
1, 1,
// Next two numbers also optional and represent end position for multichar tokens like this one. Numbers follow same rule as was described above
1, 10
]
```
There are many patterns how tokenization could be done, PostCSS motto is performance and simplicity. Tokenization is a complex computing operation and takes a large amount of syntax analysis time ( ~90% ), that why PostCSS' Tokenizer looks dirty but it was optimized for speed. Any high-level constructs like classes could dramatically slow down tokenizer.
PostCSS' Tokenizer uses some sort of streaming/chaining API where you expose [`nextToken()`](https://github.com/postcss/postcss/blob/master/lib/tokenize.es6#L48-L308) method to Parser. In this manner, we provide a clean interface for Parser and reduce memory usage by storing only a few tokens and not the whole list of tokens.
- #### Parser ( [lib/parse.es6](https://github.com/postcss/postcss/blob/master/lib/parse.es6), [lib/parser.es6](https://github.com/postcss/postcss/blob/master/lib/parser.es6) )
Parser is the main structure responsible for [syntax analysis](https://en.wikipedia.org/wiki/Parsing) of incoming CSS. Parser produces a structure called [Abstract Syntax Tree (AST)](https://en.wikipedia.org/wiki/Abstract_syntax_tree) that could then be transformed by plugins later on.
Parser works in common with Tokenizer and operates over tokens, not source string, as it would be a very inefficient operation.
It uses mostly `nextToken` and `back` methods provided by Tokenizer for obtaining single or multiple tokens and then construct part of AST called `Node`.
There are multiple Node types that PostCSS could produce but all of them inherit from base Node [class](https://github.com/postcss/postcss/blob/master/lib/node.es6#L34).
- #### Processor ( [lib/processor.es6](https://github.com/postcss/postcss/blob/master/lib/processor.es6) )
Processor is a very plain structure that initializes plugins and runs syntax transformations. Plugin is just a function registered with [postcss.plugin](https://github.com/postcss/postcss/blob/master/lib/postcss.es6#L109) call.
It exposes only a few public API methods. Description of them could be found on [api.postcss.org/Processor](http://api.postcss.org/Processor.html)
- #### Stringifier ( [lib/stringify.es6](https://github.com/postcss/postcss/blob/master/lib/stringify.es6), [lib/stringifier.es6](https://github.com/postcss/postcss/blob/master/lib/stringifier.es6) )
Stringifier is a base class that translates modified AST to pure CSS string. Stringifier traverses AST starting from provided Node and generates a raw string representation of it calling corresponding methods.
The most essential method is [`Stringifier.stringify`](https://github.com/postcss/postcss/blob/master/lib/stringifier.es6#L25-L27)
that accepts initial Node and semicolon indicator.
You can learn more by checking [stringifier.es6](https://github.com/postcss/postcss/blob/master/lib/stringifier.es6)
### API Reference
More descriptive API documentation could be found [here](http://api.postcss.org/)

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# PostCSS Plugin Guidelines
A PostCSS plugin is a function that receives and, usually,
transforms a CSS AST from the PostCSS parser.
The rules below are *mandatory* for all PostCSS plugins.
See also [ClojureWerkzs recommendations] for open source projects.
[ClojureWerkzs recommendations]: http://blog.clojurewerkz.org/blog/2013/04/20/how-to-make-your-open-source-project-really-awesome/
## 1. API
### 1.1 Clear name with `postcss-` prefix
The plugins purpose should be clear just by reading its name.
If you wrote a transpiler for CSS 4 Custom Media, `postcss-custom-media`
would be a good name. If you wrote a plugin to support mixins,
`postcss-mixins` would be a good name.
The prefix `postcss-` shows that the plugin is part of the PostCSS ecosystem.
This rule is not mandatory for plugins that can run as independent tools,
without the user necessarily knowing that it is powered by
PostCSS — for example, [RTLCSS] and [Autoprefixer].
[Autoprefixer]: https://github.com/postcss/autoprefixer
[RTLCSS]: https://rtlcss.com/
### 1.2. Do one thing, and do it well
Do not create multitool plugins. Several small, one-purpose plugins bundled into
a plugin pack is usually a better solution.
For example, [`postcss-preset-env`] contains many small plugins,
one for each W3C specification. And [`cssnano`] contains a separate plugin
for each of its optimization.
[`postcss-preset-env`]: https://preset-env.cssdb.org/
[`cssnano`]: https://github.com/ben-eb/cssnano
### 1.3. Do not use mixins
Preprocessors libraries like Compass provide an API with mixins.
PostCSS plugins are different.
A plugin cannot be just a set of mixins for [`postcss-mixins`].
To achieve your goal, consider transforming valid CSS
or using custom at-rules and custom properties.
[`postcss-mixins`]: https://github.com/postcss/postcss-mixins
### 1.4. Create plugin by `postcss.plugin`
By wrapping your function in this method,
you are hooking into a common plugin API:
```js
module.exports = postcss.plugin('plugin-name', opts => {
return (root, result) => {
// Plugin code
}
})
```
## 2. Processing
### 2.1. Plugin must be tested
A CI service like [Travis] is also recommended for testing code in
different environments. You should test in (at least) Node.js [active LTS](https://github.com/nodejs/LTS) and current stable version.
[Travis]: https://travis-ci.org/
### 2.2. Use asynchronous methods whenever possible
For example, use `fs.writeFile` instead of `fs.writeFileSync`:
```js
postcss.plugin('plugin-sprite', opts => {
return (root, result) => {
return new Promise((resolve, reject) => {
const sprite = makeSprite()
fs.writeFile(opts.file, sprite, err => {
if (err) return reject(err)
resolve()
})
})
}
})
```
### 2.3. Set `node.source` for new nodes
Every node must have a relevant `source` so PostCSS can generate
an accurate source map.
So if you add a new declaration based on some existing declaration, you should
clone the existing declaration in order to save that original `source`.
```js
if (needPrefix(decl.prop)) {
decl.cloneBefore({ prop: '-webkit-' + decl.prop })
}
```
You can also set `source` directly, copying from some existing node:
```js
if (decl.prop === 'animation') {
const keyframe = createAnimationByName(decl.value)
keyframes.source = decl.source
decl.root().append(keyframes)
}
```
### 2.4. Use only the public PostCSS API
PostCSS plugins must not rely on undocumented properties or methods,
which may be subject to change in any minor release. The public API
is described in [API docs].
[API docs]: http://api.postcss.org/
## 3. Errors
### 3.1. Use `node.error` on CSS relevant errors
If you have an error because of input CSS (like an unknown name
in a mixin plugin) you should use `node.error` to create an error
that includes source position:
```js
if (typeof mixins[name] === 'undefined') {
throw decl.error('Unknown mixin ' + name, { plugin: 'postcss-mixins' })
}
```
### 3.2. Use `result.warn` for warnings
Do not print warnings with `console.log` or `console.warn`,
because some PostCSS runner may not allow console output.
```js
if (outdated(decl.prop)) {
result.warn(decl.prop + ' is outdated', { node: decl })
}
```
If CSS input is a source of the warning, the plugin must set the `node` option.
## 4. Documentation
### 4.1. Document your plugin in English
PostCSS plugins must have their `README.md` wrote in English. Do not be afraid
of your English skills, as the open source community will fix your errors.
Of course, you are welcome to write documentation in other languages;
just name them appropriately (e.g. `README.ja.md`).
### 4.2. Include input and output examples
The plugin's `README.md` must contain example input and output CSS.
A clear example is the best way to describe how your plugin works.
The first section of the `README.md` is a good place to put examples.
See [postcss-opacity](https://github.com/iamvdo/postcss-opacity) for an example.
Of course, this guideline does not apply if your plugin does not
transform the CSS.
### 4.3. Maintain a changelog
PostCSS plugins must describe the changes of all their releases
in a separate file, such as `CHANGELOG.md`, `History.md`, or [GitHub Releases].
Visit [Keep A Changelog] for more information about how to write one of these.
Of course, you should be using [SemVer].
[Keep A Changelog]: http://keepachangelog.com/
[GitHub Releases]: https://help.github.com/articles/creating-releases/
[SemVer]: http://semver.org/
### 4.4. Include `postcss-plugin` keyword in `package.json`
PostCSS plugins written for npm must have the `postcss-plugin` keyword
in their `package.json`. This special keyword will be useful for feedback about
the PostCSS ecosystem.
For packages not published to npm, this is not mandatory, but is recommended
if the package format can contain keywords.

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# PostCSS Runner Guidelines
A PostCSS runner is a tool that processes CSS through a user-defined list
of plugins; for example, [`postcss-cli`] or [`gulppostcss`].
These rules are mandatory for any such runners.
For single-plugin tools, like [`gulp-autoprefixer`],
these rules are not mandatory but are highly recommended.
See also [ClojureWerkzs recommendations] for open source projects.
[ClojureWerkzs recommendations]: http://blog.clojurewerkz.org/blog/2013/04/20/how-to-make-your-open-source-project-really-awesome/
[`gulp-autoprefixer`]: https://github.com/sindresorhus/gulp-autoprefixer
[`gulppostcss`]: https://github.com/w0rm/gulp-postcss
[`postcss-cli`]: https://github.com/postcss/postcss-cli
## 1. API
### 1.1. Accept functions in plugin parameters
If your runner uses a config file, it must be written in JavaScript, so that
it can support plugins which accept a function, such as [`postcss-assets`]:
```js
module.exports = [
require('postcss-assets')({
cachebuster: function (file) {
return fs.statSync(file).mtime.getTime().toString(16)
}
})
]
```
[`postcss-assets`]: https://github.com/borodean/postcss-assets
## 2. Processing
### 2.1. Set `from` and `to` processing options
To ensure that PostCSS generates source maps and displays better syntax errors,
runners must specify the `from` and `to` options. If your runner does not handle
writing to disk (for example, a gulp transform), you should set both options
to point to the same file:
```js
processor.process({ from: file.path, to: file.path })
```
### 2.2. Use only the asynchronous API
PostCSS runners must use only the asynchronous API.
The synchronous API is provided only for debugging, is slower,
and cant work with asynchronous plugins.
```js
processor.process(opts).then(result => {
// processing is finished
});
```
### 2.3. Use only the public PostCSS API
PostCSS runners must not rely on undocumented properties or methods,
which may be subject to change in any minor release. The public API
is described in [API docs].
[API docs]: http://api.postcss.org/
## 3. Output
### 3.1. Dont show JS stack for `CssSyntaxError`
PostCSS runners must not show a stack trace for CSS syntax errors,
as the runner can be used by developers who are not familiar with JavaScript.
Instead, handle such errors gracefully:
```js
processor.process(opts).catch(error => {
if (error.name === 'CssSyntaxError') {
process.stderr.write(error.message + error.showSourceCode())
} else {
throw error
}
})
```
### 3.2. Display `result.warnings()`
PostCSS runners must output warnings from `result.warnings()`:
```js
result.warnings().forEach(warn => {
process.stderr.write(warn.toString())
})
```
See also [postcss-log-warnings] and [postcss-messages] plugins.
[postcss-log-warnings]: https://github.com/davidtheclark/postcss-log-warnings
[postcss-messages]: https://github.com/postcss/postcss-messages
### 3.3. Allow the user to write source maps to different files
PostCSS by default will inline source maps in the generated file; however,
PostCSS runners must provide an option to save the source map in a different
file:
```js
if (result.map) {
fs.writeFile(opts.to + '.map', result.map.toString())
}
```
## 4. Documentation
### 4.1. Document your runner in English
PostCSS runners must have their `README.md` wrote in English. Do not be afraid
of your English skills, as the open source community will fix your errors.
Of course, you are welcome to write documentation in other languages;
just name them appropriately (e.g. `README.ja.md`).
### 4.2. Maintain a changelog
PostCSS runners must describe changes of all releases in a separate file,
such as `ChangeLog.md`, `History.md`, or with [GitHub Releases].
Visit [Keep A Changelog] for more information on how to write one of these.
Of course, you should use [SemVer].
[Keep A Changelog]: http://keepachangelog.com/
[GitHub Releases]: https://help.github.com/articles/creating-releases/
[SemVer]: http://semver.org/
### 4.3. `postcss-runner` keyword in `package.json`
PostCSS runners written for npm must have the `postcss-runner` keyword
in their `package.json`. This special keyword will be useful for feedback about
the PostCSS ecosystem.
For packages not published to npm, this is not mandatory, but recommended
if the package format is allowed to contain keywords.

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# PostCSS and Source Maps
PostCSS has great [source maps] support. It can read and interpret maps
from previous transformation steps, autodetect the format that you expect,
and output both external and inline maps.
To ensure that you generate an accurate source map, you must indicate the input
and output CSS file paths — using the options `from` and `to`, respectively.
To generate a new source map with the default options, simply set `map: true`.
This will generate an inline source map that contains the source content.
If you dont want the map inlined, you can set `map.inline: false`.
```js
processor
.process(css, {
from: 'app.sass.css',
to: 'app.css',
map: { inline: false }
})
.then(result => {
result.map //=> '{ "version":3,
// "file":"app.css",
// "sources":["app.sass"],
// "mappings":"AAAA,KAAI" }'
})
```
If PostCSS finds source maps from a previous transformation,
it will automatically update that source map with the same options.
## Options
If you want more control over source map generation, you can define the `map`
option as an object with the following parameters:
* `inline` boolean: indicates that the source map should be embedded
in the output CSS as a Base64-encoded comment. By default, it is `true`.
But if all previous maps are external, not inline, PostCSS will not embed
the map even if you do not set this option.
If you have an inline source map, the `result.map` property will be empty,
as the source map will be contained within the text of `result.css`.
* `prev` string, object, boolean or function: source map content from
a previous processing step (for example, Sass compilation).
PostCSS will try to read the previous source map automatically
(based on comments within the source CSS), but you can use this option
to identify it manually. If desired, you can omit the previous map
with `prev: false`.
* `sourcesContent` boolean: indicates that PostCSS should set the origin
content (for example, Sass source) of the source map. By default,
it is `true`. But if all previous maps do not contain sources content,
PostCSS will also leave it out even if you do not set this option.
* `annotation` boolean or string: indicates that PostCSS should add annotation
comments to the CSS. By default, PostCSS will always add a comment with a path
to the source map. PostCSS will not add annotations to CSS files that
do not contain any comments.
By default, PostCSS presumes that you want to save the source map as
`opts.to + '.map'` and will use this path in the annotation comment.
A different path can be set by providing a string value for `annotation`.
If you have set `inline: true`, annotation cannot be disabled.
* `from` string: by default, PostCSS will set the `sources` property of the map
to the value of the `from` option. If you want to override this behaviour, you
can use `map.from` to explicitly set the source map's `sources` property.
Path should be absolute or relative from generated file
(`to` option in `process()` method).
[source maps]: http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/

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# How to Write Custom Syntax
PostCSS can transform styles in any syntax, and is not limited to just CSS.
By writing a custom syntax, you can transform styles in any desired format.
Writing a custom syntax is much harder than writing a PostCSS plugin, but
it is an awesome adventure.
There are 3 types of PostCSS syntax packages:
* **Parser** to parse input string to nodes tree.
* **Stringifier** to generate output string by nodes tree.
* **Syntax** contains both parser and stringifier.
## Syntax
A good example of a custom syntax is [SCSS]. Some users may want to transform
SCSS sources with PostCSS plugins, for example if they need to add vendor
prefixes or change the property order. So this syntax should output SCSS from
an SCSS input.
The syntax API is a very simple plain object, with `parse` & `stringify`
functions:
```js
module.exports = {
parse: require('./parse'),
stringify: require('./stringify')
}
```
[SCSS]: https://github.com/postcss/postcss-scss
## Parser
A good example of a parser is [Safe Parser], which parses malformed/broken CSS.
Because there is no point to generate broken output, this package only provides
a parser.
The parser API is a function which receives a string & returns a [`Root`] node.
The second argument is a function which receives an object with PostCSS options.
```js
const postcss = require('postcss')
module.exports = function parse (css, opts) {
const root = postcss.root()
// Add other nodes to root
return root
}
```
[Safe Parser]: https://github.com/postcss/postcss-safe-parser
[`Root`]: http://api.postcss.org/Root.html
### Main Theory
There are many books about parsers; but do not worry because CSS syntax is
very easy, and so the parser will be much simpler than a programming language
parser.
The default PostCSS parser contains two steps:
1. [Tokenizer] which reads input string character by character and builds a
tokens array. For example, it joins space symbols to a `['space', '\n ']`
token, and detects strings to a `['string', '"\"{"']` token.
2. [Parser] which reads the tokens array, creates node instances and
builds a tree.
[Tokenizer]: https://github.com/postcss/postcss/blob/master/lib/tokenize.es6
[Parser]: https://github.com/postcss/postcss/blob/master/lib/parser.es6
### Performance
Parsing input is often the most time consuming task in CSS processors. So it
is very important to have a fast parser.
The main rule of optimization is that there is no performance without a
benchmark. You can look at [PostCSS benchmarks] to build your own.
Of parsing tasks, the tokenize step will often take the most time, so its
performance should be prioritized. Unfortunately, classes, functions and
high level structures can slow down your tokenizer. Be ready to write dirty
code with repeated statements. This is why it is difficult to extend the
default [PostCSS tokenizer]; copy & paste will be a necessary evil.
Second optimization is using character codes instead of strings.
```js
// Slow
string[i] === '{'
// Fast
const OPEN_CURLY = 123 // `{'
string.charCodeAt(i) === OPEN_CURLY
```
Third optimization is “fast jumps”. If you find open quotes, you can find
next closing quote much faster by `indexOf`:
```js
// Simple jump
next = string.indexOf('"', currentPosition + 1)
// Jump by RegExp
regexp.lastIndex = currentPosion + 1
regexp.test(string)
next = regexp.lastIndex
```
The parser can be a well written class. There is no need in copy-paste and
hardcore optimization there. You can extend the default [PostCSS parser].
[PostCSS benchmarks]: https://github.com/postcss/benchmark
[PostCSS tokenizer]: https://github.com/postcss/postcss/blob/master/lib/tokenize.es6
[PostCSS parser]: https://github.com/postcss/postcss/blob/master/lib/parser.es6
### Node Source
Every node should have `source` property to generate correct source map.
This property contains `start` and `end` properties with `{ line, column }`,
and `input` property with an [`Input`] instance.
Your tokenizer should save the original position so that you can propagate
the values to the parser, to ensure that the source map is correctly updated.
[`Input`]: https://github.com/postcss/postcss/blob/master/lib/input.es6
### Raw Values
A good PostCSS parser should provide all information (including spaces symbols)
to generate byte-to-byte equal output. It is not so difficult, but respectful
for user input and allow integration smoke tests.
A parser should save all additional symbols to `node.raws` object.
It is an open structure for you, you can add additional keys.
For example, [SCSS parser] saves comment types (`/* */` or `//`)
in `node.raws.inline`.
The default parser cleans CSS values from comments and spaces.
It saves the original value with comments to `node.raws.value.raw` and uses it,
if the node value was not changed.
[SCSS parser]: https://github.com/postcss/postcss-scss
### Tests
Of course, all parsers in the PostCSS ecosystem must have tests.
If your parser just extends CSS syntax (like [SCSS] or [Safe Parser]),
you can use the [PostCSS Parser Tests]. It contains unit & integration tests.
[PostCSS Parser Tests]: https://github.com/postcss/postcss-parser-tests
## Stringifier
A style guide generator is a good example of a stringifier. It generates output
HTML which contains CSS components. For this use case, a parser isn't necessary,
so the package should just contain a stringifier.
The Stringifier API is little bit more complicated, than the parser API.
PostCSS generates a source map, so a stringifier cant just return a string.
It must link every substring with its source node.
A Stringifier is a function which receives [`Root`] node and builder callback.
Then it calls builder with every nodes string and node instance.
```js
module.exports = function stringify (root, builder) {
// Some magic
const string = decl.prop + ':' + decl.value + ';'
builder(string, decl)
// Some science
};
```
### Main Theory
PostCSS [default stringifier] is just a class with a method for each node type
and many methods to detect raw properties.
In most cases it will be enough just to extend this class,
like in [SCSS stringifier].
[default stringifier]: https://github.com/postcss/postcss/blob/master/lib/stringifier.es6
[SCSS stringifier]: https://github.com/postcss/postcss-scss/blob/master/lib/scss-stringifier.es6
### Builder Function
A builder function will be passed to `stringify` function as second argument.
For example, the default PostCSS stringifier class saves it
to `this.builder` property.
Builder receives output substring and source node to append this substring
to the final output.
Some nodes contain other nodes in the middle. For example, a rule has a `{`
at the beginning, many declarations inside and a closing `}`.
For these cases, you should pass a third argument to builder function:
`'start'` or `'end'` string:
```js
this.builder(rule.selector + '{', rule, 'start')
// Stringify declarations inside
this.builder('}', rule, 'end')
```
### Raw Values
A good PostCSS custom syntax saves all symbols and provide byte-to-byte equal
output if there were no changes.
This is why every node has `node.raws` object to store space symbol, etc.
All data related to source code and not CSS structure, should be in `Node#raws`. For instance, `postcss-scss` keep in `Comment#raws.inline` boolean marker of inline comment (`// comment` instead of `/* comment */`).
Be careful, because sometimes these raw properties will not be present; some
nodes may be built manually, or may lose their indentation when they are moved
to another parent node.
This is why the default stringifier has a `raw()` method to autodetect raw
properties by other nodes. For example, it will look at other nodes to detect
indent size and them multiply it with the current node depth.
### Tests
A stringifier must have tests too.
You can use unit and integration test cases from [PostCSS Parser Tests].
Just compare input CSS with CSS after your parser and stringifier.
[PostCSS Parser Tests]: https://github.com/postcss/postcss-parser-tests

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"use strict";
exports.__esModule = true;
exports.default = void 0;
var _container = _interopRequireDefault(require("./container"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
/**
* Represents an at-rule.
*
* If its followed in the CSS by a {} block, this node will have
* a nodes property representing its children.
*
* @extends Container
*
* @example
* const root = postcss.parse('@charset "UTF-8"; @media print {}')
*
* const charset = root.first
* charset.type //=> 'atrule'
* charset.nodes //=> undefined
*
* const media = root.last
* media.nodes //=> []
*/
var AtRule = /*#__PURE__*/function (_Container) {
_inheritsLoose(AtRule, _Container);
function AtRule(defaults) {
var _this;
_this = _Container.call(this, defaults) || this;
_this.type = 'atrule';
return _this;
}
var _proto = AtRule.prototype;
_proto.append = function append() {
var _Container$prototype$;
if (!this.nodes) this.nodes = [];
for (var _len = arguments.length, children = new Array(_len), _key = 0; _key < _len; _key++) {
children[_key] = arguments[_key];
}
return (_Container$prototype$ = _Container.prototype.append).call.apply(_Container$prototype$, [this].concat(children));
};
_proto.prepend = function prepend() {
var _Container$prototype$2;
if (!this.nodes) this.nodes = [];
for (var _len2 = arguments.length, children = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
children[_key2] = arguments[_key2];
}
return (_Container$prototype$2 = _Container.prototype.prepend).call.apply(_Container$prototype$2, [this].concat(children));
}
/**
* @memberof AtRule#
* @member {string} name The at-rules name immediately follows the `@`.
*
* @example
* const root = postcss.parse('@media print {}')
* media.name //=> 'media'
* const media = root.first
*/
/**
* @memberof AtRule#
* @member {string} params The at-rules parameters, the values
* that follow the at-rules name but precede
* any {} block.
*
* @example
* const root = postcss.parse('@media print, screen {}')
* const media = root.first
* media.params //=> 'print, screen'
*/
/**
* @memberof AtRule#
* @member {object} raws Information to generate byte-to-byte equal
* node string as it was in the origin input.
*
* Every parser saves its own properties,
* but the default CSS parser uses:
*
* * `before`: the space symbols before the node. It also stores `*`
* and `_` symbols before the declaration (IE hack).
* * `after`: the space symbols after the last child of the node
* to the end of the node.
* * `between`: the symbols between the property and value
* for declarations, selector and `{` for rules, or last parameter
* and `{` for at-rules.
* * `semicolon`: contains true if the last child has
* an (optional) semicolon.
* * `afterName`: the space between the at-rule name and its parameters.
*
* PostCSS cleans at-rule parameters from comments and extra spaces,
* but it stores origin content in raws properties.
* As such, if you dont change a declarations value,
* PostCSS will use the raw value with comments.
*
* @example
* const root = postcss.parse(' @media\nprint {\n}')
* root.first.first.raws //=> { before: ' ',
* // between: ' ',
* // afterName: '\n',
* // after: '\n' }
*/
;
return AtRule;
}(_container.default);
var _default = AtRule;
exports.default = _default;
module.exports = exports.default;
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View File

@@ -0,0 +1,55 @@
"use strict";
exports.__esModule = true;
exports.default = void 0;
var _node = _interopRequireDefault(require("./node"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
/**
* Represents a comment between declarations or statements (rule and at-rules).
*
* Comments inside selectors, at-rule parameters, or declaration values
* will be stored in the `raws` properties explained above.
*
* @extends Node
*/
var Comment = /*#__PURE__*/function (_Node) {
_inheritsLoose(Comment, _Node);
function Comment(defaults) {
var _this;
_this = _Node.call(this, defaults) || this;
_this.type = 'comment';
return _this;
}
/**
* @memberof Comment#
* @member {string} text The comments text.
*/
/**
* @memberof Comment#
* @member {object} raws Information to generate byte-to-byte equal
* node string as it was in the origin input.
*
* Every parser saves its own properties,
* but the default CSS parser uses:
*
* * `before`: the space symbols before the node.
* * `left`: the space symbols between `/*` and the comments text.
* * `right`: the space symbols between the comments text.
*/
return Comment;
}(_node.default);
var _default = Comment;
exports.default = _default;
module.exports = exports.default;
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"use strict";
exports.__esModule = true;
exports.default = void 0;
var _node = _interopRequireDefault(require("./node"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
/**
* Represents a CSS declaration.
*
* @extends Node
*
* @example
* const root = postcss.parse('a { color: black }')
* const decl = root.first.first
* decl.type //=> 'decl'
* decl.toString() //=> ' color: black'
*/
var Declaration = /*#__PURE__*/function (_Node) {
_inheritsLoose(Declaration, _Node);
function Declaration(defaults) {
var _this;
_this = _Node.call(this, defaults) || this;
_this.type = 'decl';
return _this;
}
/**
* @memberof Declaration#
* @member {string} prop The declarations property name.
*
* @example
* const root = postcss.parse('a { color: black }')
* const decl = root.first.first
* decl.prop //=> 'color'
*/
/**
* @memberof Declaration#
* @member {string} value The declarations value.
*
* @example
* const root = postcss.parse('a { color: black }')
* const decl = root.first.first
* decl.value //=> 'black'
*/
/**
* @memberof Declaration#
* @member {boolean} important `true` if the declaration
* has an !important annotation.
*
* @example
* const root = postcss.parse('a { color: black !important; color: red }')
* root.first.first.important //=> true
* root.first.last.important //=> undefined
*/
/**
* @memberof Declaration#
* @member {object} raws Information to generate byte-to-byte equal
* node string as it was in the origin input.
*
* Every parser saves its own properties,
* but the default CSS parser uses:
*
* * `before`: the space symbols before the node. It also stores `*`
* and `_` symbols before the declaration (IE hack).
* * `between`: the symbols between the property and value
* for declarations.
* * `important`: the content of the important statement,
* if it is not just `!important`.
*
* PostCSS cleans declaration from comments and extra spaces,
* but it stores origin content in raws properties.
* As such, if you dont change a declarations value,
* PostCSS will use the raw value with comments.
*
* @example
* const root = postcss.parse('a {\n color:black\n}')
* root.first.first.raws //=> { before: '\n ', between: ':' }
*/
return Declaration;
}(_node.default);
var _default = Declaration;
exports.default = _default;
module.exports = exports.default;
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"use strict";
exports.__esModule = true;
exports.default = void 0;
var _parser = _interopRequireDefault(require("./parser"));
var _input = _interopRequireDefault(require("./input"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function parse(css, opts) {
var input = new _input.default(css, opts);
var parser = new _parser.default(input);
try {
parser.parse();
} catch (e) {
if (process.env.NODE_ENV !== 'production') {
if (e.name === 'CssSyntaxError' && opts && opts.from) {
if (/\.scss$/i.test(opts.from)) {
e.message += '\nYou tried to parse SCSS with ' + 'the standard CSS parser; ' + 'try again with the postcss-scss parser';
} else if (/\.sass/i.test(opts.from)) {
e.message += '\nYou tried to parse Sass with ' + 'the standard CSS parser; ' + 'try again with the postcss-sass parser';
} else if (/\.less$/i.test(opts.from)) {
e.message += '\nYou tried to parse Less with ' + 'the standard CSS parser; ' + 'try again with the postcss-less parser';
}
}
}
throw e;
}
return parser.root;
}
var _default = parse;
exports.default = _default;
module.exports = exports.default;
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"use strict";
exports.__esModule = true;
exports.default = void 0;
var _container = _interopRequireDefault(require("./container"));
var _list = _interopRequireDefault(require("./list"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
/**
* Represents a CSS rule: a selector followed by a declaration block.
*
* @extends Container
*
* @example
* const root = postcss.parse('a{}')
* const rule = root.first
* rule.type //=> 'rule'
* rule.toString() //=> 'a{}'
*/
var Rule = /*#__PURE__*/function (_Container) {
_inheritsLoose(Rule, _Container);
function Rule(defaults) {
var _this;
_this = _Container.call(this, defaults) || this;
_this.type = 'rule';
if (!_this.nodes) _this.nodes = [];
return _this;
}
/**
* An array containing the rules individual selectors.
* Groups of selectors are split at commas.
*
* @type {string[]}
*
* @example
* const root = postcss.parse('a, b { }')
* const rule = root.first
*
* rule.selector //=> 'a, b'
* rule.selectors //=> ['a', 'b']
*
* rule.selectors = ['a', 'strong']
* rule.selector //=> 'a, strong'
*/
_createClass(Rule, [{
key: "selectors",
get: function get() {
return _list.default.comma(this.selector);
},
set: function set(values) {
var match = this.selector ? this.selector.match(/,\s*/) : null;
var sep = match ? match[0] : ',' + this.raw('between', 'beforeOpen');
this.selector = values.join(sep);
}
/**
* @memberof Rule#
* @member {string} selector The rules full selector represented
* as a string.
*
* @example
* const root = postcss.parse('a, b { }')
* const rule = root.first
* rule.selector //=> 'a, b'
*/
/**
* @memberof Rule#
* @member {object} raws Information to generate byte-to-byte equal
* node string as it was in the origin input.
*
* Every parser saves its own properties,
* but the default CSS parser uses:
*
* * `before`: the space symbols before the node. It also stores `*`
* and `_` symbols before the declaration (IE hack).
* * `after`: the space symbols after the last child of the node
* to the end of the node.
* * `between`: the symbols between the property and value
* for declarations, selector and `{` for rules, or last parameter
* and `{` for at-rules.
* * `semicolon`: contains `true` if the last child has
* an (optional) semicolon.
* * `ownSemicolon`: contains `true` if there is semicolon after rule.
*
* PostCSS cleans selectors from comments and extra spaces,
* but it stores origin content in raws properties.
* As such, if you dont change a declarations value,
* PostCSS will use the raw value with comments.
*
* @example
* const root = postcss.parse('a {\n color:black\n}')
* root.first.first.raws //=> { before: '', between: ' ', after: '\n' }
*/
}]);
return Rule;
}(_container.default);
var _default = Rule;
exports.default = _default;
module.exports = exports.default;
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"use strict";
exports.__esModule = true;
exports.default = void 0;
var _stringifier = _interopRequireDefault(require("./stringifier"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function stringify(node, builder) {
var str = new _stringifier.default(builder);
str.stringify(node);
}
var _default = stringify;
exports.default = _default;
module.exports = exports.default;
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"use strict";
exports.__esModule = true;
exports.default = void 0;
var _chalk = _interopRequireDefault(require("chalk"));
var _tokenize = _interopRequireDefault(require("./tokenize"));
var _input = _interopRequireDefault(require("./input"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var HIGHLIGHT_THEME = {
'brackets': _chalk.default.cyan,
'at-word': _chalk.default.cyan,
'comment': _chalk.default.gray,
'string': _chalk.default.green,
'class': _chalk.default.yellow,
'call': _chalk.default.cyan,
'hash': _chalk.default.magenta,
'(': _chalk.default.cyan,
')': _chalk.default.cyan,
'{': _chalk.default.yellow,
'}': _chalk.default.yellow,
'[': _chalk.default.yellow,
']': _chalk.default.yellow,
':': _chalk.default.yellow,
';': _chalk.default.yellow
};
function getTokenType(_ref, processor) {
var type = _ref[0],
value = _ref[1];
if (type === 'word') {
if (value[0] === '.') {
return 'class';
}
if (value[0] === '#') {
return 'hash';
}
}
if (!processor.endOfFile()) {
var next = processor.nextToken();
processor.back(next);
if (next[0] === 'brackets' || next[0] === '(') return 'call';
}
return type;
}
function terminalHighlight(css) {
var processor = (0, _tokenize.default)(new _input.default(css), {
ignoreErrors: true
});
var result = '';
var _loop = function _loop() {
var token = processor.nextToken();
var color = HIGHLIGHT_THEME[getTokenType(token, processor)];
if (color) {
result += token[1].split(/\r?\n/).map(function (i) {
return color(i);
}).join('\n');
} else {
result += token[1];
}
};
while (!processor.endOfFile()) {
_loop();
}
return result;
}
var _default = terminalHighlight;
exports.default = _default;
module.exports = exports.default;
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"use strict";
exports.__esModule = true;
exports.default = void 0;
/**
* Contains helpers for working with vendor prefixes.
*
* @example
* const vendor = postcss.vendor
*
* @namespace vendor
*/
var vendor = {
/**
* Returns the vendor prefix extracted from an input string.
*
* @param {string} prop String with or without vendor prefix.
*
* @return {string} vendor prefix or empty string
*
* @example
* postcss.vendor.prefix('-moz-tab-size') //=> '-moz-'
* postcss.vendor.prefix('tab-size') //=> ''
*/
prefix: function prefix(prop) {
var match = prop.match(/^(-\w+-)/);
if (match) {
return match[0];
}
return '';
},
/**
* Returns the input string stripped of its vendor prefix.
*
* @param {string} prop String with or without vendor prefix.
*
* @return {string} String name without vendor prefixes.
*
* @example
* postcss.vendor.unprefixed('-moz-tab-size') //=> 'tab-size'
*/
unprefixed: function unprefixed(prop) {
return prop.replace(/^-\w+-/, '');
}
};
var _default = vendor;
exports.default = _default;
module.exports = exports.default;
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"use strict";
exports.__esModule = true;
exports.default = warnOnce;
var printed = {};
function warnOnce(message) {
if (printed[message]) return;
printed[message] = true;
if (typeof console !== 'undefined' && console.warn) {
console.warn(message);
}
}
module.exports = exports.default;
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'use strict';
const path = require('path');
const Module = require('module');
const resolveFrom = (fromDir, moduleId, silent) => {
if (typeof fromDir !== 'string') {
throw new TypeError(`Expected \`fromDir\` to be of type \`string\`, got \`${typeof fromDir}\``);
}
if (typeof moduleId !== 'string') {
throw new TypeError(`Expected \`moduleId\` to be of type \`string\`, got \`${typeof moduleId}\``);
}
fromDir = path.resolve(fromDir);
const fromFile = path.join(fromDir, 'noop.js');
const resolveFileName = () => Module._resolveFilename(moduleId, {
id: fromFile,
filename: fromFile,
paths: Module._nodeModulePaths(fromDir)
});
if (silent) {
try {
return resolveFileName();
} catch (err) {
return null;
}
}
return resolveFileName();
};
module.exports = (fromDir, moduleId) => resolveFrom(fromDir, moduleId);
module.exports.silent = (fromDir, moduleId) => resolveFrom(fromDir, moduleId, true);

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The MIT License (MIT)
Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# resolve-from [![Build Status](https://travis-ci.org/sindresorhus/resolve-from.svg?branch=master)](https://travis-ci.org/sindresorhus/resolve-from)
> Resolve the path of a module like [`require.resolve()`](https://nodejs.org/api/globals.html#globals_require_resolve) but from a given path
## Install
```
$ npm install --save resolve-from
```
## Usage
```js
const resolveFrom = require('resolve-from');
// There is a file at `./foo/bar.js`
resolveFrom('foo', './bar');
//=> '/Users/sindresorhus/dev/test/foo/bar.js'
```
## API
### resolveFrom(fromDir, moduleId)
Like `require()`, throws when the module can't be found.
### resolveFrom.silent(fromDir, moduleId)
Returns `null` instead of throwing when the module can't be found.
#### fromDir
Type: `string`
Directory to resolve from.
#### moduleId
Type: `string`
What you would use in `require()`.
## Tip
Create a partial using a bound function if you want to resolve from the same `fromDir` multiple times:
```js
const resolveFromFoo = resolveFrom.bind(null, 'foo');
resolveFromFoo('./bar');
resolveFromFoo('./baz');
```
## Related
- [resolve-cwd](https://github.com/sindresorhus/resolve-cwd) - Resolve the path of a module from the current working directory
- [req-from](https://github.com/sindresorhus/req-from) - Require a module from a given path
- [req-cwd](https://github.com/sindresorhus/req-cwd) - Require a module from the current working directory
- [resolve-pkg](https://github.com/sindresorhus/resolve-pkg) - Resolve the path of a package regardless of it having an entry point
- [lazy-req](https://github.com/sindresorhus/lazy-req) - Require modules lazily
## License
MIT © [Sindre Sorhus](https://sindresorhus.com)

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'use strict';
module.exports = {
stdout: false,
stderr: false
};

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'use strict';
const os = require('os');
const hasFlag = require('has-flag');
const {env} = process;
let forceColor;
if (hasFlag('no-color') ||
hasFlag('no-colors') ||
hasFlag('color=false') ||
hasFlag('color=never')) {
forceColor = 0;
} else if (hasFlag('color') ||
hasFlag('colors') ||
hasFlag('color=true') ||
hasFlag('color=always')) {
forceColor = 1;
}
if ('FORCE_COLOR' in env) {
if (env.FORCE_COLOR === true || env.FORCE_COLOR === 'true') {
forceColor = 1;
} else if (env.FORCE_COLOR === false || env.FORCE_COLOR === 'false') {
forceColor = 0;
} else {
forceColor = env.FORCE_COLOR.length === 0 ? 1 : Math.min(parseInt(env.FORCE_COLOR, 10), 3);
}
}
function translateLevel(level) {
if (level === 0) {
return false;
}
return {
level,
hasBasic: true,
has256: level >= 2,
has16m: level >= 3
};
}
function supportsColor(stream) {
if (forceColor === 0) {
return 0;
}
if (hasFlag('color=16m') ||
hasFlag('color=full') ||
hasFlag('color=truecolor')) {
return 3;
}
if (hasFlag('color=256')) {
return 2;
}
if (stream && !stream.isTTY && forceColor === undefined) {
return 0;
}
const min = forceColor || 0;
if (env.TERM === 'dumb') {
return min;
}
if (process.platform === 'win32') {
// Node.js 7.5.0 is the first version of Node.js to include a patch to
// libuv that enables 256 color output on Windows. Anything earlier and it
// won't work. However, here we target Node.js 8 at minimum as it is an LTS
// release, and Node.js 7 is not. Windows 10 build 10586 is the first Windows
// release that supports 256 colors. Windows 10 build 14931 is the first release
// that supports 16m/TrueColor.
const osRelease = os.release().split('.');
if (
Number(process.versions.node.split('.')[0]) >= 8 &&
Number(osRelease[0]) >= 10 &&
Number(osRelease[2]) >= 10586
) {
return Number(osRelease[2]) >= 14931 ? 3 : 2;
}
return 1;
}
if ('CI' in env) {
if (['TRAVIS', 'CIRCLECI', 'APPVEYOR', 'GITLAB_CI'].some(sign => sign in env) || env.CI_NAME === 'codeship') {
return 1;
}
return min;
}
if ('TEAMCITY_VERSION' in env) {
return /^(9\.(0*[1-9]\d*)\.|\d{2,}\.)/.test(env.TEAMCITY_VERSION) ? 1 : 0;
}
if (env.COLORTERM === 'truecolor') {
return 3;
}
if ('TERM_PROGRAM' in env) {
const version = parseInt((env.TERM_PROGRAM_VERSION || '').split('.')[0], 10);
switch (env.TERM_PROGRAM) {
case 'iTerm.app':
return version >= 3 ? 3 : 2;
case 'Apple_Terminal':
return 2;
// No default
}
}
if (/-256(color)?$/i.test(env.TERM)) {
return 2;
}
if (/^screen|^xterm|^vt100|^vt220|^rxvt|color|ansi|cygwin|linux/i.test(env.TERM)) {
return 1;
}
if ('COLORTERM' in env) {
return 1;
}
return min;
}
function getSupportLevel(stream) {
const level = supportsColor(stream);
return translateLevel(level);
}
module.exports = {
supportsColor: getSupportLevel,
stdout: getSupportLevel(process.stdout),
stderr: getSupportLevel(process.stderr)
};

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MIT License
Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# supports-color [![Build Status](https://travis-ci.org/chalk/supports-color.svg?branch=master)](https://travis-ci.org/chalk/supports-color)
> Detect whether a terminal supports color
---
<div align="center">
<b>
<a href="https://tidelift.com/subscription/pkg/npm-supports-color?utm_source=npm-supports-color&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a>
</b>
<br>
<sub>
Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
</sub>
</div>
---
## Install
```
$ npm install supports-color
```
## Usage
```js
const supportsColor = require('supports-color');
if (supportsColor.stdout) {
console.log('Terminal stdout supports color');
}
if (supportsColor.stdout.has256) {
console.log('Terminal stdout supports 256 colors');
}
if (supportsColor.stderr.has16m) {
console.log('Terminal stderr supports 16 million colors (truecolor)');
}
```
## API
Returns an `Object` with a `stdout` and `stderr` property for testing either streams. Each property is an `Object`, or `false` if color is not supported.
The `stdout`/`stderr` objects specifies a level of support for color through a `.level` property and a corresponding flag:
- `.level = 1` and `.hasBasic = true`: Basic color support (16 colors)
- `.level = 2` and `.has256 = true`: 256 color support
- `.level = 3` and `.has16m = true`: Truecolor support (16 million colors)
## Info
It obeys the `--color` and `--no-color` CLI flags.
For situations where using `--color` is not possible, use the environment variable `FORCE_COLOR=1` (level 1), `FORCE_COLOR=2` (level 2), or `FORCE_COLOR=3` (level 3) to forcefully enable color, or `FORCE_COLOR=0` to forcefully disable. The use of `FORCE_COLOR` overrides all other color support checks.
Explicit 256/Truecolor mode can be enabled using the `--color=256` and `--color=16m` flags, respectively.
## Security
To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.
## Related
- [supports-color-cli](https://github.com/chalk/supports-color-cli) - CLI for this module
- [chalk](https://github.com/chalk/chalk) - Terminal string styling done right
## Maintainers
- [Sindre Sorhus](https://github.com/sindresorhus)
- [Josh Junon](https://github.com/qix-)
## License
MIT

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/*
* This example targets Node 4 and up.
*/
const cssnano = require('cssnano');
/*
* Add your CSS code here.
*/
const css = `
h1 {
color: #ff0000;
font-weight: bold;
}
`;
/*
* Add any PostCSS options here. For example to enable sourcemaps, see:
* https://github.com/postcss/postcss/blob/master/site/source-maps.md
*
* Or for an inline sourcemap, uncomment the options below.
*/
const postcssOpts = {
// from: 'app.css',
// to: 'app.min.css',
// map: {inline: true},
};
/*
* Add your choice of preset. Note that for any value other
* than 'default', you will need to install the appropriate
* preset separately.
*/
const cssnanoOpts = {
preset: 'default',
};
/*
* Compress the CSS asynchronously and log it to the console.
*/
cssnano.process(css, postcssOpts, cssnanoOpts).then(result => {
console.log(result.css);
});