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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| import path from 'node:path'; | ||
| import postcss from 'postcss'; | ||
| import fs from 'node:fs/promises'; | ||
| import pkg from '../postcss.config.cjs'; | ||
| import { createRequire } from 'node:module'; | ||
| import { sync as brotli } from 'brotli-size'; | ||
| import { gzipSizeSync as gzip } from 'gzip-size'; | ||
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| // Comes in handy later when we run postcss | ||
| const { plugins } = pkg; | ||
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| // @ts-ignore | ||
| const require = createRequire(import.meta.url); | ||
| const { scripts } = require('../package.json'); | ||
| /** | ||
| * We build up an object with script:command pairs from package.json | ||
| * | ||
| * @type {Object.<string, string>} | ||
| */ | ||
| const filtered = Object.keys(scripts) | ||
| .filter((key) => key.startsWith('lib:')) | ||
| .reduce((obj, key) => { | ||
| obj[key] = scripts[key]; | ||
| return obj; | ||
| }, {}); | ||
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| /** | ||
| * The regex captures a filepath and filename group from an npm command. | ||
| * | ||
| * Captures for the command `postcss src/extra/normalize.light.css -o normalize.light.min.css` yields | ||
| * { | ||
| * groups: { | ||
| * filepath: 'src/extra/normalize.light.css', | ||
| * filename: 'normalize.light.min.css' | ||
| * } | ||
| * } | ||
| */ | ||
| const regex = /postcss\s(?<filepath>\S+)\s\-[o]\s(?<filename>.*\.css)(?:.*$)/; | ||
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| /** | ||
| * @typedef {Object} Size | ||
| * @propety {number} raw - Unminified size in bytes | ||
| * @property {string} size - Unminified size in KiB | ||
| * @property {string} minified - Minified size in KiB | ||
| * @property {string} brotli - Brotli compressed minified size in KiB | ||
| * @property {string} gzip - Gzip compressed minified size in KiB | ||
| */ | ||
| /** @type {Object.<string, Size>} sizes */ | ||
| let sizes = {} | ||
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| for (const [_, script] of Object.entries(filtered)) { | ||
| const found = script.match(regex); | ||
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| if (!found) continue; | ||
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| /** | ||
| * @typedef {object} CaptureGroup | ||
| * @property {string} filepath | ||
| * @property {string} filename | ||
| */ | ||
| /** @type {CaptureGroup} */ | ||
| const { filepath, filename } = found.groups; | ||
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| /** | ||
| * @type {import('postcss').ProcessOptions} | ||
| */ | ||
| const options = { from: path.resolve(`../${filepath}`), to: undefined }; | ||
| const css = await fs.readFile(path.resolve(`../${filepath}`), 'utf-8'); | ||
| /** | ||
| * Run the css through PostCSS (just like Open-Props). | ||
| * plugins.slice(0, -1) remove `cssnano` plugin so we can get the size of the unminified code | ||
| */ | ||
| const code = await postcss(plugins.slice(0, -1)).process(css, options); | ||
| /** | ||
| * This time we want to get the minified size. | ||
| */ | ||
| const minified = await postcss(plugins).process(css, options); | ||
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| /** | ||
| * Build the sizes object. | ||
| * Strip `.min` from the filename | ||
| */ | ||
| sizes[filename.replace('.min', '')] = { | ||
| raw: code.css.length, // in bytes | ||
| size: (code.css.length / 1024).toFixed(2), // in KiB | ||
| minified: (minified.css.length / 1024).toFixed(2), // KiB | ||
| brotli: (brotli(minified.css) / 1024).toFixed(2), // in KiB | ||
| gzip: (gzip(minified.css) / 1024).toFixed(2), // in KiB | ||
| } | ||
| } | ||
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| await fs.writeFile('bundle-sizes.json', JSON.stringify(sizes, null, 2), { encoding: 'utf8' }); |
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