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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 3x 3x 1x 5x 4x 2x 1x 5x 5x 5x 5x 3x 6x 3x 3x 4x 3x 3x 3x 3x 3x 1x 1x 3x 3x | const postcss = require('postcss') const { env } = require('process') const MakeDirectories = require('./make_dir') const MakeWebp = require('./make_webp') const GetImagePath = require('./get_image_path') const CreateNewPath = require('./create_new_path') const CheckAttribute = require('./check_attribute') const CreateAttribute = require('./create_attribute') const DEFAULT_OPTS = { env, environments: 'all', imageFolder: /~images/, quality: 60, replaceFrom: /\.(jpe?g|png)/, resolvePath: 'app/javascript/images', webpClass: '.webp', webpFolder: 'tmp/webp', webpPath: '~webp' } const makeAssets = async (options, { folder, url }) => { await MakeDirectories(options, folder) await MakeWebp(options, url) } const checkEnvironment = ({ environments, env: e }) => { if (environments === 'all') return true if (Array.isArray(environments)) return environments.includes(e) return environments === e } module.exports = postcss.plugin('postcss-webp-processing', (opts = {}) => { let options = { ...DEFAULT_OPTS, ...opts } /* eslint-disable */ let tester = new RegExp(`^${ options.webpClass }`) /* eslint-enable */ return function (root) { // Transform CSS AST here if (!checkEnvironment(options)) return root.walkRules(rule => { if (tester.test(rule.selector)) return let decs = [] rule.walkDecls(/^background-?|border-image/, decl => { if (CheckAttribute(options, decl)) { let paths = GetImagePath(decl) let webpPath = CreateNewPath(options, paths) makeAssets(options, paths) .then(() => { // console.log("Asset webp create"); }) .catch(e => { console.error(e) }) let v = CreateAttribute(decl.value, webpPath) decs.push(postcss.decl({ prop: decl.prop, value: v })) } else Eif (decl.prop === 'background-size') { decs.push(postcss.decl({ prop: decl.prop, value: decl.value })) } }) Eif (decs.length > 0) { root.append({ selector: `${ options.webpClass } ${ rule.selector }`, nodes: decs }) } }) } }) |