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+[![npm][npm]][npm-url]
+[![node][node]][node-url]
+[![deps][deps]][deps-url]
+[![Greenkeeper badge](https://badges.greenkeeper.io/postcss/postcss-cli.svg)](https://greenkeeper.io/)
+[![tests][tests]][tests-url]
+[![cover][cover]][cover-url]
+[![chat][chat]][chat-url]
+
+<div align="center">
+  <img width="100" height="100" title="CLI" src="http://postcss.github.io/postcss-cli/logo.svg">
+  <a href="https://github.com/postcss/postcss">
+    <img width="110" height="110" title="PostCSS" src="http://postcss.github.io/postcss/logo.svg" hspace="10">
+  </a>
+  <h1>PostCSS CLI</h1>
+</div>
+
+<h2 align="center">Install</h2>
+
+```bash
+npm i -g|-D postcss-cli
+```
+
+<h2 align="center">Usage</h2>
+
+```
+Usage:
+  postcss [input.css] [OPTIONS] [-o|--output output.css] [--watch|-w]
+  postcss <input.css>... [OPTIONS] --dir <output-directory> [--watch|-w]
+  postcss <input-directory> [OPTIONS] --dir <output-directory> [--watch|-w]
+  postcss <input-glob-pattern> [OPTIONS] --dir <output-directory> [--watch|-w]
+  postcss <input.css>... [OPTIONS] --replace
+
+Basic options:
+  -o, --output   Output file                                            [string]
+  -d, --dir      Output directory                                       [string]
+  -r, --replace  Replace (overwrite) the input file                    [boolean]
+  --map, -m      Create an external sourcemap
+  --no-map       Disable the default inline sourcemaps
+  --verbose      Be verbose                                            [boolean]
+  --watch, -w    Watch files for changes and recompile as needed       [boolean]
+  --env          A shortcut for setting NODE_ENV                        [string]
+
+Options for when not using a config file:
+  -u, --use      List of postcss plugins to use                          [array]
+  --parser       Custom postcss parser                                  [string]
+  --stringifier  Custom postcss stringifier                             [string]
+  --syntax       Custom postcss syntax                                  [string]
+
+Advanced options:
+  --ext     Override the output file extension; for use with --dir      [string]
+  --base    Mirror the directory structure relative to this path in the output
+            directory, for use with --dir                               [string]
+  --poll    Use polling for file watching. Can optionally pass polling interval;
+            default 100 ms
+  --config  Set a custom path to look for a config file                 [string]
+
+Options:
+  --version  Show version number                                       [boolean]
+  -h, --help     Show help                                             [boolean]
+
+Examples:
+  postcss input.css -o output.css                       Basic usage
+  postcss src/**/*.css --base src --dir build           Glob Pattern & output
+  cat input.css | postcss -u autoprefixer > output.css  Piping input & output
+
+If no input files are passed, it reads from stdin. If neither -o, --dir, or
+--replace is passed, it writes to stdout.
+
+If there are multiple input files, the --dir or --replace option must be passed.
+
+Input files may contain globs (ie: src/**/*.css). If you pass an input directory, it will process
+all files in the directory and any subdirectories, respecting the glob pattern.
+```
+
+> ℹ️ More details on custom parsers, stringifiers and syntaxes, can be found [here](https://github.com/postcss/postcss#syntaxes).
+
+### [Config](https://github.com/michael-ciniawsky/postcss-load-config)
+
+If you need to pass options to your plugins, or have a long plugin chain, you'll want to use a configuration file.
+
+**postcss.config.js**
+
+```js
+module.exports = {
+  parser: 'sugarss',
+  plugins: [
+    require('postcss-import')({ ...options }),
+    require('postcss-url')({ url: 'copy', useHash: true })
+  ]
+}
+```
+
+Note that you **can not** set the `from` or `to` options for postcss in the config file. They are set automatically based on the CLI arguments.
+
+### Context
+
+For more advanced usage it's recommend to to use a function in `postcss.config.js`, this gives you access to the CLI context to dynamically apply options and plugins **per file**
+
+|   Name    |    Type    |              Default               | Description          |
+| :-------: | :--------: | :--------------------------------: | :------------------- |
+|   `env`   | `{String}` |          `'development'`           | process.env.NODE_ENV |
+|  `file`   | `{Object}` |    `dirname, basename, extname`    | File                 |
+| `options` | `{Object}` | `map, parser, syntax, stringifier` | PostCSS Options      |
+
+**postcss.config.js**
+
+```js
+module.exports = ctx => ({
+  map: ctx.options.map,
+  parser: ctx.file.extname === '.sss' ? 'sugarss' : false,
+  plugins: {
+    'postcss-import': { root: ctx.file.dirname },
+    cssnano: ctx.env === 'production' ? {} : false
+  }
+})
+```
+
+> ⚠️ If you want to set options via CLI, it's mandatory to reference `ctx.options` in `postcss.config.js`
+
+```bash
+postcss input.sss -p sugarss -o output.css -m
+```
+
+**postcss.config.js**
+
+```js
+module.exports = ctx => ({
+  map: ctx.options.map,
+  parser: ctx.options.parser,
+  plugins: {
+    'postcss-import': { root: ctx.file.dirname },
+    cssnano: ctx.env === 'production' ? {} : false
+  }
+})
+```
+
+[npm]: https://img.shields.io/npm/v/postcss-cli.svg
+[npm-url]: https://npmjs.com/package/postcss-cli
+[node]: https://img.shields.io/node/v/postcss-cli.svg
+[node-url]: https://nodejs.org/
+[deps]: https://img.shields.io/gemnasium/postcss/postcss-cli.svg
+[deps-url]: https://gemnasium.com/postcss/postcss-cli
+[tests]: http://img.shields.io/travis/postcss/postcss-cli/master.svg
+[tests-url]: https://travis-ci.org/postcss/postcss-cli
+[cover]: https://img.shields.io/coveralls/postcss/postcss-cli/master.svg
+[cover-url]: https://coveralls.io/github/postcss/postcss-cli
+[chat]: https://img.shields.io/gitter/room/postcss/postcss.svg
+[chat-url]: https://gitter.im/postcss/postcss