|
| 1 | +const { forEachOfLimit } = require('async'); |
| 2 | +const rtlcss = require('rtlcss'); |
| 3 | +const cssDiff = require('@romainberger/css-diff'); |
| 4 | +const cssnano = require('cssnano'); |
| 5 | +const { ConcatSource } = require('webpack-sources'); |
| 6 | + |
| 7 | +class RTLCSSPlugin { |
| 8 | + constructor(options) { |
| 9 | + this.options = { |
| 10 | + filename: false, |
| 11 | + options: {}, |
| 12 | + plugins: [], |
| 13 | + ...options |
| 14 | + } |
| 15 | + } |
| 16 | + |
| 17 | + apply(compiler) { |
| 18 | + compiler.hooks.emit.tapAsync('RTLCSSPlugin', (compilation, callback) => { |
| 19 | + forEachOfLimit(compilation.chunks, 5, (chunk, key, cb) => { |
| 20 | + const rtlFiles = []; |
| 21 | + let cssnanoPromise = Promise.resolve(); |
| 22 | + |
| 23 | + chunk.files.forEach(asset => { |
| 24 | + const match = this.options.test ? new RegExp(this.options.test).test(asset) : true; |
| 25 | + |
| 26 | + if (path.extname(asset) !== '.css') { |
| 27 | + return; |
| 28 | + } |
| 29 | + |
| 30 | + const baseSource = compilation.assets[asset].source(); |
| 31 | + let filename = ''; |
| 32 | + let rtlSource = ''; |
| 33 | + |
| 34 | + if (match) { |
| 35 | + rtlSource = rtlcss.process(baseSource, this.options.options, this.options.plugins); |
| 36 | + |
| 37 | + if (this.options.filename instanceof Array && this.options.filename.length === 2) { |
| 38 | + filename = asset.replace(this.options.filename[0], this.options.filename[1]); |
| 39 | + } else if (this.options.filename) { |
| 40 | + filename = this.options.filename; |
| 41 | + |
| 42 | + if (/\[contenthash]/.test(this.options.filename)) { |
| 43 | + const hash = createHash('md5').update(rtlSource).digest('hex').substr(0, 10); |
| 44 | + filename = filename.replace('[contenthash]', hash); |
| 45 | + } |
| 46 | + if (/\[id]/.test(this.options.filename)) { |
| 47 | + filename = filename.replace('[id]', chunk.id); |
| 48 | + } |
| 49 | + if (/\[name]/.test(this.options.filename)) { |
| 50 | + filename = path.dirname(asset) + '/' + filename.replace('[name]', path.basename(asset, '.css')); |
| 51 | + } |
| 52 | + if (/\[file]/.test(this.options.filename)) { |
| 53 | + filename = filename.replace('[file]', asset); |
| 54 | + } |
| 55 | + if (/\[filebase]/.test(this.options.filename)) { |
| 56 | + filename = filename.replace('[filebase]', path.basename(asset)); |
| 57 | + } |
| 58 | + if (/\[ext]/.test(this.options.filename)) { |
| 59 | + filename = filename.replace('.[ext]', path.extname(asset)); |
| 60 | + } |
| 61 | + } else { |
| 62 | + const newFilename = `${path.basename(asset, '.css')}.rtl`; |
| 63 | + filename = asset.replace(path.basename(asset, '.css'), newFilename); |
| 64 | + } |
| 65 | + |
| 66 | + if (this.options.diffOnly) { |
| 67 | + rtlSource = cssDiff(baseSource, rtlSource) |
| 68 | + } |
| 69 | + } |
| 70 | + |
| 71 | + if (this.options.minify !== false) { |
| 72 | + let nanoOptions = { from: undefined } |
| 73 | + if (typeof this.options.minify === 'object') { |
| 74 | + nanoOptions = this.options.minify; |
| 75 | + } |
| 76 | + |
| 77 | + cssnanoPromise = cssnanoPromise.then(() => { |
| 78 | + let minify = cssnano.process( baseSource, nanoOptions).then(output => { |
| 79 | + compilation.assets[asset] = new ConcatSource(output.css); |
| 80 | + }); |
| 81 | + |
| 82 | + if (match) { |
| 83 | + const rtlMinify = cssnano.process(rtlSource, nanoOptions).then(output => { |
| 84 | + compilation.assets[filename] = new ConcatSource(output.css); |
| 85 | + rtlFiles.push(filename); |
| 86 | + }); |
| 87 | + |
| 88 | + minify = Promise.all([minify, rtlMinify]); |
| 89 | + } |
| 90 | + |
| 91 | + return minify; |
| 92 | + }); |
| 93 | + } else if (match) { |
| 94 | + compilation.assets[filename] = new ConcatSource(rtlSource); |
| 95 | + rtlFiles.push(filename); |
| 96 | + } |
| 97 | + }); |
| 98 | + |
| 99 | + cssnanoPromise.then(() => { |
| 100 | + chunk.files.push.apply(chunk.files, rtlFiles) |
| 101 | + cb() |
| 102 | + }); |
| 103 | + }, callback); |
| 104 | + }); |
| 105 | + } |
| 106 | +} |
| 107 | + |
| 108 | +module.exports = RTLCSSPlugin; |
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