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CSS Post-Processor that chunks CSS files per IE9 selector count restrictions
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<a href="../../index.html">all files</a> / <a href="index.html">src/commands/</a> chunk.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js"><span class="cstat-no" title="statement not covered" >import chalk from 'chalk';</span>
<span class="cstat-no" title="statement not covered" >import yargs from 'yargs';</span>
<span class="cstat-no" title="statement not covered" >import common from './common-yargs';</span>
<span class="cstat-no" title="statement not covered" >import { chunkFile } from '../index';</span>
<span class="cstat-no" title="statement not covered" >import path from 'path';</span>
<span class="cstat-no" title="statement not covered" >import fs from 'fs';</span>
<span class="cstat-no" title="statement not covered" >import fsp from 'fs-promise';</span>
<span class="cstat-no" title="statement not covered" >import { ensureDir, expand } from '../fs-utils';</span>
<span class="cstat-no" title="statement not covered" ><span class="cstat-no" title="statement not covered" ><span class="cstat-no" title="statement not covered" ><span class="cstat-no" title="statement not covered" ><span class="cstat-no" title="statement not covered" ><span class="cstat-no" title="statement not covered" ><span class="cstat-no" title="statement not covered" ><span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >async function <span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >executeChunk(input, outputDir, chunkOptions) {</span></span></span></span></span></span></span></span></span></span></span>
let <span class="cstat-no" title="statement not covered" >basename = path.basename(input, '.css');</span>
const {data, maps, totalSelectorCount} = await <span class="cstat-no" title="statement not covered" >chunkFile(input, chunkOptions);</span>
let chunkData = data.map(<span class="fstat-no" title="function not covered" >(ast, index) => {</span>
let <span class="cstat-no" title="statement not covered" >outputFilename = path.join(outputDir, `${basename}.${index}.css`);</span>
return <span class="cstat-no" title="statement not covered" >fsp.writeFile(outputFilename, ast);</span>
});
let sourcemaps = maps.map(<span class="fstat-no" title="function not covered" >(sourcemap, index) => {</span>
let <span class="cstat-no" title="statement not covered" >outputFilename = path.join(outputDir, `${basename}.${index}.css.map`);</span>
return <span class="cstat-no" title="statement not covered" >fsp.writeFile(outputFilename, JSON.stringify(sourcemap));</span>
});
const chunks = await <span class="cstat-no" title="statement not covered" >Promise.all(chunkData);</span>
await <span class="cstat-no" title="statement not covered" >Promise.all(sourcemaps);</span>
return <span class="cstat-no" title="statement not covered" >chunks;</span>
}
<span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >function execute(options) {</span></span>
return <span class="cstat-no" title="statement not covered" >expand(options.input)</span>
.filter(<span class="fstat-no" title="function not covered" >x => <span class="cstat-no" title="statement not covered" >/\.css$/.test(x))</span></span>
.map(<span class="fstat-no" title="function not covered" >filepath => {</span>
let <span class="cstat-no" title="statement not covered" >outputDir = options.outDir;</span>
return <span class="cstat-no" title="statement not covered" >ensureDir(outputDir)</span>
.then(<span class="fstat-no" title="function not covered" >() => <span class="cstat-no" title="statement not covered" >executeChunk(filepath, outputDir, { sourcemaps: options.sourcemaps }));</span></span>
})
.flatMap(<span class="fstat-no" title="function not covered" >x => <span class="cstat-no" title="statement not covered" >x)</span></span>
.reduce(<span class="fstat-no" title="function not covered" >(acc, x) => <span class="cstat-no" title="statement not covered" >acc.concat([x]), [])</span></span>
.toPromise(Promise)
.then(<span class="fstat-no" title="function not covered" >() => {</span>
console.<span class="cstat-no" title="statement not covered" >log(chalk.green('Complete'));</span>
return <span class="cstat-no" title="statement not covered" >0;</span>
});
}
<span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >function yargsSetup() {</span></span>
yargs.<span class="cstat-no" title="statement not covered" >command('chunk', 'breaks up css file to multiple files if it exceeds IE selector limits');</span>
}
<span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >function examples() {</span></span>
yargs.<span class="cstat-no" title="statement not covered" >example('$0 chunk <input file|directory> (chunked files will reside next to input css files with the format *.##.css)');</span>
yargs.<span class="cstat-no" title="statement not covered" >example('$0 chunk <input file|directory> --out-dir <output directory>');</span>
yargs.<span class="cstat-no" title="statement not covered" >example('$0 chunk <input file|directory> --sourcemaps');</span>
}
<span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >function parseArgs(argv){</span></span>
yargs.<span class="cstat-no" title="statement not covered" >reset();</span>
common();
examples();
let <span class="cstat-no" title="statement not covered" >options = yargs</span>
.help('h')
.alias('h', 'help')
.options({
'out-dir': {
description: 'output directory',
type: 'string'
},
'sourcemaps': {
description: 'ouput sourcemaps',
type: 'boolean'
}
})
.parse(argv);
if (<span class="cstat-no" title="statement not covered" >options.help) {</span>
return <span class="cstat-no" title="statement not covered" >options;</span>
}
options.<span class="cstat-no" title="statement not covered" >input = options._.length > 0 ? options._[0] : null;</span>
if (<span class="cstat-no" title="statement not covered" >!options.input) {</span>
throw <span class="cstat-no" title="statement not covered" >'No input provided';</span>
}
options.<span class="cstat-no" title="statement not covered" >input = path.resolve(options.input);</span>
if (<span class="cstat-no" title="statement not covered" >!options.outDir) {</span>
if (<span class="cstat-no" title="statement not covered" >fs.statSync(options.input).isDirectory()) {</span>
options.<span class="cstat-no" title="statement not covered" >outDir = options.input;</span>
} else {
options.<span class="cstat-no" title="statement not covered" >outDir = path.dirname(options.input);</span>
}
} else {
options.<span class="cstat-no" title="statement not covered" >outDir = path.resolve(options.outDir);</span>
}
return <span class="cstat-no" title="statement not covered" >options;</span>
}
export default <span class="cstat-no" title="statement not covered" >{</span>
execute,
examples,
yargsSetup,
parseArgs
};
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