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191 lines
7.8 KiB
191 lines
7.8 KiB
2 years ago
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import postcssBrowserComments from 'postcss-browser-comments';
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import Module from 'module';
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import path from 'path';
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import { URL } from 'url';
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import fs from 'fs';
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import postcss from 'postcss';
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const assign = (...objects) => Object.assign(...objects);
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const create = (...objects) => assign(Object.create(null), ...objects);
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const currentURL = import.meta.url;
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const currentFilename = new URL(currentURL).pathname;
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const currentDirname = path.dirname(currentFilename); // get resolved filenames for normalize.css
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const normalizeCSS = resolve('@csstools/normalize.css');
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const normalizeDir = path.dirname(normalizeCSS);
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const normalizeOpinionatedCSS = path.join(normalizeDir, 'opinionated.css'); // get resolved filenames for sanitize.css
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const sanitizeCSS = resolve('sanitize.css');
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const sanitizeDir = path.dirname(sanitizeCSS);
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const sanitizeAssetsCSS = path.join(sanitizeDir, 'assets.css');
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const sanitizeFormsCSS = path.join(sanitizeDir, 'forms.css');
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const sanitizeReduceMotionCSS = path.join(sanitizeDir, 'reduce-motion.css');
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const sanitizeTypographyCSS = path.join(sanitizeDir, 'typography.css');
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const sanitizeSystemUiCSS = path.join(sanitizeDir, 'system-ui.css');
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const sanitizeUiMonospace = path.join(sanitizeDir, 'ui-monospace.css'); // export a hashmap of css library filenames
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const parsableFilenames = create({
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[normalizeCSS]: true,
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[normalizeOpinionatedCSS]: true,
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[sanitizeCSS]: true,
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[sanitizeAssetsCSS]: true,
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[sanitizeFormsCSS]: true,
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[sanitizeReduceMotionCSS]: true,
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[sanitizeTypographyCSS]: true,
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[sanitizeSystemUiCSS]: true,
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[sanitizeUiMonospace]: true
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}); // export a hashmap of css library filenames by id
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const resolvedFilenamesById = create({
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'normalize': [normalizeCSS],
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'normalize/opinionated': [normalizeOpinionatedCSS],
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'normalize/*': [normalizeOpinionatedCSS],
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'sanitize': [sanitizeCSS],
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'sanitize/assets': [sanitizeAssetsCSS],
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'sanitize/forms': [sanitizeCSS, sanitizeFormsCSS],
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'sanitize/page': [sanitizeAssetsCSS],
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// deprecated; remaining for v10.0.0 compatibility
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'sanitize/reduce-motion': [sanitizeCSS, sanitizeReduceMotionCSS],
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'sanitize/system-ui': [sanitizeCSS, sanitizeSystemUiCSS],
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'sanitize/typography': [sanitizeCSS, sanitizeTypographyCSS],
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'sanitize/ui-monospace': [sanitizeCSS, sanitizeUiMonospace],
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'sanitize/*': [sanitizeCSS, sanitizeFormsCSS]
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}); // get the resolved filename of a package/module
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function resolve(id) {
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return resolve[id] = resolve[id] || Module._resolveFilename(id, {
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id: currentFilename,
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filename: currentFilename,
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paths: Module._nodeModulePaths(currentDirname)
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});
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}
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const cache$1 = create();
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async function readFile(filename) {
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filename = path.resolve(filename);
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cache$1[filename] = cache$1[filename] || create();
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return new Promise((resolve, reject) => fs.stat(filename, (statsError, {
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mtime
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}) => statsError ? reject(statsError) : mtime === cache$1[filename].mtime ? resolve(cache$1[filename].data) : fs.readFile(filename, 'utf8', (readFileError, data) => readFileError ? reject(readFileError) : resolve((cache$1[filename] = {
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data,
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mtime
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}).data))));
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}
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const cache = create(null);
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var parse = ((filename, transformer) => readFile(filename).then( // cache the parsed css root
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css => cache[css] = cache[css] || postcss.parse(css, {
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from: filename
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})).then( // clone the cached root
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root => root.clone()).then( // transform the cloned root
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clone => Promise.resolve(transformer(clone)).then( // resolve the cloned root
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() => clone)));
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var postcssImportNormalize = (commentsTransformer => opts => {
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opts = create(opts); // return an postcss-import configuration
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return create({
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load(filename, importOptions) {
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return filename in parsableFilenames // parse the file (the file and css are conservatively cached)
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? parse(filename, commentsTransformer).then(root => root.toResult({
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to: filename,
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map: true
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}).css) : typeof opts.load === 'function' // otherwise, use the override loader
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? opts.load.call(null, filename, importOptions) // otherwise, return the (conservatively cached) contents of the file
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: readFile(filename);
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},
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resolve(id, basedir, importOptions) {
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// get the css id by removing css extensions
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const cssId = id.replace(cssExtRegExp$1, '');
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return cssId in resolvedFilenamesById // return the known resolved path for the css id
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? resolvedFilenamesById[cssId] : typeof opts.resolve === 'function' // otherwise, use the override resolver
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? opts.resolve.call(null, id, basedir, importOptions) // otherwise, return the id to be resolved by postcss-import
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: id;
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}
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});
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});
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const cssExtRegExp$1 = /\.css\b/g;
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const postcssPlugin = (commentsTransformer, opts) => root => {
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const promises = [];
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const insertedFilenames = {}; // use @import insertion point
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root.walkAtRules(importRegExp, atrule => {
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// get name as a fallback value for the library (e.g. @import-normalize is like @import "normalize.css")
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const name = atrule.name.match(importRegExp)[1]; // get url from "library", 'library', url("library"), url('library'), or the fallback value
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const url = (atrule.params.match(paramsRegExp) || []).slice(1).find(part => part) || name;
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if (url) {
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// get the css id by removing css extensions
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const cssId = url.replace(cssExtRegExp, '');
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if (cssId in resolvedFilenamesById) {
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// promise the library import is replaced with its contents
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promises.push(Promise.all(resolvedFilenamesById[cssId].filter( // ignore filenames that have already been inserted
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filename => insertedFilenames[filename] = opts.allowDuplicates || !(filename in insertedFilenames)).map( // parse the file (the file and css are conservatively cached)
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filename => parse(filename, commentsTransformer))).then(roots => {
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if (roots.length) {
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// combine all the library nodes returned by the parsed files
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const nodes = roots.reduce((all, root) => all.concat(root.nodes), []); // replace the import with all the library nodes
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atrule.replaceWith(...nodes);
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}
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}));
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}
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}
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});
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return Promise.all([].concat( // promise the library imports are replaced with their contents
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promises, // promise certain libraries are prepended
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Promise.all([].concat(opts.forceImport || []).reduce( // filter the id to be a known id or boolean true
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(all, id) => {
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if (id === true) {
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all.push(...resolvedFilenamesById.normalize);
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} else if (typeof id === 'string') {
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const cssId = id.replace(cssExtRegExp, '');
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if (cssId in resolvedFilenamesById) {
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all.push(...resolvedFilenamesById[cssId]);
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}
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}
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return all;
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}, []).filter( // ignore filenames that have already been inserted
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filename => insertedFilenames[filename] = opts.allowDuplicates || !(filename in insertedFilenames)).map( // parse the file (the file and css are conservatively cached)
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filename => parse(filename, commentsTransformer))).then(roots => {
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if (roots.length) {
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// combine all the library nodes returned by the parsed files
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const nodes = roots.reduce((all, root) => all.concat(root.nodes), []); // prepend the stylesheet with all the library nodes
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root.prepend(...nodes);
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}
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})));
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};
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const cssExtRegExp = /\.css\b/g;
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const importRegExp = /^import(?:-(normalize|sanitize))?$/;
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const paramsRegExp = /^\s*(?:url\((?:"(.+)"|'(.+)')\)|"(.+)"|'(.+)')[\W\w]*$/;
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const plugin = opts => {
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opts = create(opts);
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const commentsTransformer = postcssBrowserComments(opts).Once;
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const normalizeTransformer = postcssPlugin(commentsTransformer, opts);
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const postcssImportConfig = postcssImportNormalize(commentsTransformer);
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return {
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postcssPlugin: 'postcss-normalize',
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Once(root) {
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return normalizeTransformer(root);
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},
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postcssImport: postcssImportConfig
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};
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};
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plugin.postcss = true;
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export { plugin as default };
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