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styles.ts
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styles.ts
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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { tags } from '@angular-devkit/core';
import * as fs from 'fs';
import * as path from 'path';
import * as webpack from 'webpack';
import { WebpackConfigOptions } from '../../utils/build-options';
import {
AnyComponentStyleBudgetChecker,
PostcssCliResources,
RemoveHashPlugin,
SuppressExtractedTextChunksWebpackPlugin,
} from '../plugins';
import { getOutputHashFormat, normalizeExtraEntryPoints } from '../utils/helpers';
// tslint:disable-next-line:no-big-function
export function getStylesConfig(wco: WebpackConfigOptions) {
const autoprefixer = require('autoprefixer');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const postcssImports = require('postcss-import');
const { root, buildOptions } = wco;
const entryPoints: { [key: string]: [string, ...string[]] } = {};
const globalStylePaths: string[] = [];
const extraPlugins: { apply(compiler: webpack.Compiler): void }[] = [];
extraPlugins.push(new AnyComponentStyleBudgetChecker(buildOptions.budgets));
const cssSourceMap = buildOptions.sourceMap.styles;
// Determine hashing format.
const hashFormat = getOutputHashFormat(buildOptions.outputHashing as string);
// use includePaths from appConfig
const includePaths = buildOptions.stylePreprocessorOptions?.includePaths?.map(p => path.resolve(root, p)) ?? [];
// Process global styles.
if (buildOptions.styles.length > 0) {
const chunkNames: string[] = [];
normalizeExtraEntryPoints(buildOptions.styles, 'styles').forEach(style => {
let resolvedPath = path.resolve(root, style.input);
if (!fs.existsSync(resolvedPath)) {
try {
resolvedPath = require.resolve(style.input, { paths: [root] });
} catch {}
}
// Add style entry points.
if (entryPoints[style.bundleName]) {
entryPoints[style.bundleName].push(resolvedPath);
} else {
entryPoints[style.bundleName] = [resolvedPath];
}
// Add non injected styles to the list.
if (!style.inject) {
chunkNames.push(style.bundleName);
}
// Add global css paths.
globalStylePaths.push(resolvedPath);
});
if (chunkNames.length > 0) {
// Add plugin to remove hashes from lazy styles.
extraPlugins.push(new RemoveHashPlugin({ chunkNames, hashFormat }));
}
}
let sassImplementation: {} | undefined;
try {
// tslint:disable-next-line:no-implicit-dependencies
sassImplementation = require('node-sass');
wco.logger.warn(tags.oneLine`'node-sass' usage is deprecated and will be removed in a future major version.
To opt-out of the deprecated behaviour and start using 'sass' uninstall 'node-sass'.`,
);
} catch {
sassImplementation = require('sass');
}
// set base rules to derive final rules from
const baseRules: { test: RegExp, use: webpack.RuleSetLoader[] }[] = [
{ test: /\.css$/, use: [] },
{
test: /\.scss$|\.sass$/,
use: [
{
loader: require.resolve('resolve-url-loader'),
options: {
sourceMap: cssSourceMap,
},
},
{
loader: require.resolve('sass-loader'),
options: {
implementation: sassImplementation,
sourceMap: true,
sassOptions: {
// bootstrap-sass requires a minimum precision of 8
precision: 8,
includePaths,
// Use expanded as otherwise sass will remove comments that are needed for autoprefixer
// Ex: /* autoprefixer grid: autoplace */
// tslint:disable-next-line: max-line-length
// See: https://github.com/webpack-contrib/sass-loader/blob/45ad0be17264ceada5f0b4fb87e9357abe85c4ff/src/getSassOptions.js#L68-L70
outputStyle: 'expanded',
},
},
},
],
},
{
test: /\.less$/,
use: [
{
loader: require.resolve('less-loader'),
options: {
sourceMap: cssSourceMap,
lessOptions: {
javascriptEnabled: true,
paths: includePaths,
},
},
},
],
},
{
test: /\.styl$/,
use: [
{
loader: require.resolve('resolve-url-loader'),
options: {
sourceMap: cssSourceMap,
},
},
{
loader: require.resolve('stylus-loader'),
options: {
sourceMap: cssSourceMap,
webpackImporter: false,
stylusOptions: {
compress: false,
sourceMap: { comment: false },
paths: includePaths,
},
},
},
],
},
];
const postcssOptionsCreator = (sourceMap: boolean, extracted: boolean | undefined) => {
return (loader: webpack.loader.LoaderContext) => ({
map: sourceMap && {
inline: true,
annotation: false,
},
plugins: [
postcssImports({
resolve: (url: string) => url.startsWith('~') ? url.substr(1) : url,
load: (filename: string) => {
return new Promise<string>((resolve, reject) => {
loader.fs.readFile(filename, (err: Error, data: Buffer) => {
if (err) {
reject(err);
return;
}
const content = data.toString();
resolve(content);
});
});
},
}),
PostcssCliResources({
baseHref: buildOptions.baseHref,
deployUrl: buildOptions.deployUrl,
resourcesOutputPath: buildOptions.resourcesOutputPath,
loader,
rebaseRootRelative: buildOptions.rebaseRootRelativeCssUrls,
filename: `[name]${hashFormat.file}.[ext]`,
emitFile: buildOptions.platform !== 'server',
extracted,
}),
autoprefixer(),
],
});
};
// load component css as raw strings
const componentsSourceMap = !!(
cssSourceMap
// Never use component css sourcemap when style optimizations are on.
// It will just increase bundle size without offering good debug experience.
&& !buildOptions.optimization.styles
// Inline all sourcemap types except hidden ones, which are the same as no sourcemaps
// for component css.
&& !buildOptions.sourceMap.hidden
);
const rules: webpack.RuleSetRule[] = baseRules.map(({ test, use }) => ({
exclude: globalStylePaths,
test,
use: [
{ loader: require.resolve('raw-loader') },
{
loader: require.resolve('postcss-loader'),
options: {
postcssOptions: postcssOptionsCreator(componentsSourceMap, false),
},
},
...use,
],
}));
// load global css as css files
if (globalStylePaths.length > 0) {
const globalSourceMap = !!(
cssSourceMap && !buildOptions.extractCss && !buildOptions.sourceMap.hidden
);
rules.push(
...baseRules.map(({ test, use }) => {
return {
include: globalStylePaths,
test,
use: [
buildOptions.extractCss
? {
loader: MiniCssExtractPlugin.loader,
options: {
hmr: buildOptions.hmr,
},
}
: require.resolve('style-loader'),
{
loader: require.resolve('css-loader'),
options: {
url: false,
sourceMap: globalSourceMap,
},
},
{
loader: require.resolve('postcss-loader'),
options: {
postcssOptions: postcssOptionsCreator(globalSourceMap, buildOptions.extractCss),
},
},
...use,
],
};
}),
);
}
if (buildOptions.extractCss) {
extraPlugins.push(
// extract global css from js files into own css file
new MiniCssExtractPlugin({ filename: `[name]${hashFormat.extract}.css` }),
// suppress empty .js files in css only entry points
new SuppressExtractedTextChunksWebpackPlugin(),
);
}
return {
entry: entryPoints,
module: { rules },
plugins: extraPlugins,
};
}