forked from external-repos/squoosh
115 lines
3.6 KiB
JavaScript
115 lines
3.6 KiB
JavaScript
/**
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* Copyright 2020 Google Inc. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { promisify } from 'util';
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import { promises as fsp, readFileSync } from 'fs';
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import path from 'path';
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import { posix } from 'path';
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import glob from 'glob';
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import postcss from 'postcss';
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import postCSSNested from 'postcss-nested';
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import postCSSUrl from 'postcss-url';
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import postCSSModules from 'postcss-modules';
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import postCSSSimpleVars from 'postcss-simple-vars';
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import cssNano from 'cssnano';
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import {
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parse as parsePath,
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resolve as resolvePath,
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dirname,
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normalize as nomalizePath,
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sep as pathSep,
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} from 'path';
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const globP = promisify(glob);
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const moduleId = 'initial-css:';
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const initialCssModule = '\0initialCss';
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export default function initialCssPlugin() {
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return {
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name: 'initial-css-plugin',
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resolveId(id) {
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if (id === moduleId) return initialCssModule;
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},
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async load(id) {
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if (id !== initialCssModule) return;
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const matches = (
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await globP('shared/prerendered-app/**/*.css', {
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nodir: true,
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cwd: path.join(process.cwd(), 'src'),
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absolute: true,
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})
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).map((cssPath) =>
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// glob() returns windows paths with a forward slash. Normalise it:
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path.normalize(cssPath),
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);
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// Sort the matches so the parentmost items appear first.
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// This is a bit of a hack, but it means the util stuff appears in the cascade first.
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const sortedMatches = matches
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.map((match) => path.normalize(match).split(path.sep))
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.sort((a, b) => a.length - b.length)
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.map((match) => '/' + posix.join(...match));
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const cssSources = await Promise.all(
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sortedMatches.map(async (path) => {
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this.addWatchFile(path);
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const file = await fsp.readFile(path);
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const cssResult = await postcss([
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postCSSNested,
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postCSSSimpleVars(),
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postCSSModules({
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root: '',
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}),
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postCSSUrl({
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url: ({ relativePath, url }) => {
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if (/^((https?|data):|#)/.test(url)) return url;
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const parsedPath = parsePath(relativePath);
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const source = readFileSync(
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resolvePath(dirname(path), relativePath),
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);
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const fileId = this.emitFile({
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type: 'asset',
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name: parsedPath.base,
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source,
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});
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const hash = createHash('md5');
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hash.update(source);
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const md5 = hash.digest('hex');
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hashToId.set(md5, fileId);
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return `/fake/path/to/asset/${md5}/`;
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},
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}),
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cssNano,
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]).process(file, {
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from: path,
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});
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return cssResult.css;
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}),
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);
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const css = cssSources.join('\n');
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const fileId = this.emitFile({
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type: 'asset',
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source: css,
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name: 'initial.css',
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});
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return `export default import.meta.ROLLUP_FILE_URL_${fileId};`;
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},
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};
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}
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