element-web/webpack.config.js
Michael Telatynski 7329a5f1fc
Fix source maps in production builds ()
Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
2024-11-20 16:28:03 +00:00

790 lines
38 KiB
JavaScript

/* eslint-disable quote-props */
const dotenv = require("dotenv");
const path = require("path");
const webpack = require("webpack");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const TerserPlugin = require("terser-webpack-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
const HtmlWebpackInjectPreload = require("@principalstudio/html-webpack-inject-preload");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const VersionFilePlugin = require("webpack-version-file-plugin");
// Environment variables
// RIOT_OG_IMAGE_URL: specifies the URL to the image which should be used for the opengraph logo.
// CSP_EXTRA_SOURCE: specifies a URL which should be appended to each CSP directive which uses 'self',
// this can be helpful if your deployment has redirects for old bundles, such as develop.element.io.
dotenv.config();
let ogImageUrl = process.env.RIOT_OG_IMAGE_URL;
if (!ogImageUrl) ogImageUrl = "https://app.element.io/themes/element/img/logos/opengraph.png";
const cssThemes = {
// CSS themes
"theme-legacy-light": "./res/themes/legacy-light/css/legacy-light.pcss",
"theme-legacy-dark": "./res/themes/legacy-dark/css/legacy-dark.pcss",
"theme-light": "./res/themes/light/css/light.pcss",
"theme-light-high-contrast": "./res/themes/light-high-contrast/css/light-high-contrast.pcss",
"theme-dark": "./res/themes/dark/css/dark.pcss",
"theme-light-custom": "./res/themes/light-custom/css/light-custom.pcss",
"theme-dark-custom": "./res/themes/dark-custom/css/dark-custom.pcss",
};
// See docs/customisations.md
let fileOverrides = {
/* {[file: string]: string} */
};
try {
fileOverrides = require("./customisations.json");
// stringify the output so it appears in logs correctly, as large files can sometimes get
// represented as `<Object>` which is less than helpful.
console.log("Using customisations.json : " + JSON.stringify(fileOverrides, null, 4));
process.on("exit", () => {
console.log(""); // blank line
console.warn("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
console.warn("!! Customisations have been deprecated and will be removed in a future release !!");
console.warn("!! See https://github.com/element-hq/element-web/blob/develop/docs/customisations.md !!");
console.warn("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
console.log(""); // blank line
});
} catch (e) {
// ignore - not important
}
function parseOverridesToReplacements(overrides) {
return Object.entries(overrides).map(([oldPath, newPath]) => {
return new webpack.NormalModuleReplacementPlugin(
// because the input is effectively defined by the person running the build, we don't
// need to do anything special to protect against regex overrunning, etc.
new RegExp(oldPath.replace(/\//g, "[\\/\\\\]").replace(/\./g, "\\.")),
function (resource) {
resource.request = path.resolve(__dirname, newPath);
resource.createData.resource = path.resolve(__dirname, newPath);
// Starting with Webpack 5 we also need to set the context as otherwise replacing
// files in e.g. matrix-js-sdk with files from element-web will try to resolve
// them within matrix-js-sdk (https://github.com/webpack/webpack/issues/17716)
resource.context = path.dirname(resource.request);
resource.createData.context = path.dirname(resource.createData.resource);
},
);
});
}
const moduleReplacementPlugins = [
...parseOverridesToReplacements(require("./components.json")),
// Allow customisations to override the default components too
...parseOverridesToReplacements(fileOverrides),
];
module.exports = (env, argv) => {
// Establish settings based on the environment and args.
//
// argv.mode is always set to "production" by yarn build
// (called to build prod, nightly and develop.element.io)
// arg.mode is set to "development" by yarn start
// (called by developers, runs the continuous reload script)
// process.env.CI_PACKAGE is set when yarn build is called from scripts/ci_package.sh
// (called to build nightly and develop.element.io)
const nodeEnv = argv.mode;
const devMode = nodeEnv !== "production";
const enableMinification = !devMode && !process.env.CI_PACKAGE;
let VERSION = process.env.VERSION;
if (!VERSION) {
VERSION = require("./package.json").version;
if (devMode) {
VERSION += "-dev";
}
}
const development = {};
if (devMode) {
// Embedded source maps for dev builds, can't use eval-source-map due to CSP
development["devtool"] = "inline-source-map";
} else {
// High quality source maps in separate .map files which include the source. This doesn't bulk up the .js
// payload file size, which is nice for performance but also necessary to get the bundle to a small enough
// size that sentry will accept the upload.
development["devtool"] = "source-map";
}
// Resolve the directories for the js-sdk for later use. We resolve these early, so we
// don't have to call them over and over. We also resolve to the package.json instead of the src
// directory, so we don't have to rely on an index.js or similar file existing.
const jsSdkSrcDir = path.resolve(require.resolve("matrix-js-sdk/package.json"), "..", "src");
return {
...development,
bail: true,
entry: {
bundle: "./src/vector/index.ts",
mobileguide: "./src/vector/mobile_guide/index.ts",
jitsi: "./src/vector/jitsi/index.ts",
usercontent: "./src/usercontent/index.ts",
serviceworker: {
import: "./src/serviceworker/index.ts",
filename: "sw.js", // update WebPlatform if this changes
},
...cssThemes,
},
optimization: {
// Put all of our CSS into one useful place - this is needed for MiniCssExtractPlugin.
// Previously we used a different extraction plugin that did this magic for us, but
// now we need to consider that the CSS needs to be bundled up together.
splitChunks: {
cacheGroups: {
styles: {
name: "styles",
test: /\.css$/,
enforce: true,
// Do not add `chunks: 'all'` here because you'll break the app entry point.
},
// put the unhomoglyph data in its own file. It contains
// magic characters which mess up line numbers in the
// javascript debugger.
unhomoglyph_data: {
name: "unhomoglyph_data",
test: /unhomoglyph\/data\.json$/,
enforce: true,
chunks: "all",
},
default: {
reuseExistingChunk: true,
},
},
},
// Readable IDs for better debugging
moduleIds: "named",
// Minification is normally enabled by default for webpack in production mode, but
// we use a CSS optimizer too and need to manage it ourselves.
minimize: enableMinification,
minimizer: enableMinification
? [
new TerserPlugin({
// Already minified and includes an auto-generated license comment
// that the plugin would otherwise pointlessly extract into a separate
// file. We add the actual license using CopyWebpackPlugin below.
exclude: "jitsi_external_api.min.js",
}),
new CssMinimizerPlugin(),
]
: [],
// Set the value of `process.env.NODE_ENV` for libraries like React
// See also https://v4.webpack.js.org/configuration/optimization/#optimizationnodeenv
nodeEnv,
},
resolve: {
// We define an alternative import path so we can safely use src/ across the react-sdk
// and js-sdk. We already import from src/ where possible to ensure our source maps are
// extremely accurate (and because we're capable of compiling the layers manually rather
// than relying on partially-mangled output from babel), though we do need to fix the
// package level import (stuff like `import {Thing} from "matrix-js-sdk"` for example).
// We can't use the aliasing down below to point at src/ because that'll fail to resolve
// the package.json for the dependency. Instead, we rely on the package.json of each
// layer to have our custom alternate fields to load things in the right order. These are
// the defaults of webpack prepended with `matrix_src_`.
mainFields: ["matrix_src_browser", "matrix_src_main", "browser", "main"],
aliasFields: ["matrix_src_browser", "browser"],
// We need to specify that TS can be resolved without an extension
extensions: [".js", ".json", ".ts", ".tsx"],
alias: {
// alias any requires to the react module to the one in our path,
// otherwise we tend to get the react source included twice when
// using `npm link` / `yarn link`.
"react": path.resolve(__dirname, "node_modules/react"),
"react-dom": path.resolve(__dirname, "node_modules/react-dom"),
// Same goes for js/react-sdk - we don't need two copies.
"matrix-js-sdk": path.resolve(__dirname, "node_modules/matrix-js-sdk"),
"@matrix-org/react-sdk-module-api": path.resolve(
__dirname,
"node_modules/@matrix-org/react-sdk-module-api",
),
// and matrix-events-sdk & matrix-widget-api
"matrix-events-sdk": path.resolve(__dirname, "node_modules/matrix-events-sdk"),
"matrix-widget-api": path.resolve(__dirname, "node_modules/matrix-widget-api"),
"oidc-client-ts": path.resolve(__dirname, "node_modules/oidc-client-ts"),
// Define a variable so the i18n stuff can load
"$webapp": path.resolve(__dirname, "webapp"),
},
fallback: {
// Mock out the NodeFS module: The opus decoder imports this wrongly.
"fs": false,
"net": false,
"tls": false,
"crypto": false,
// Polyfill needed by counterpart
"util": require.resolve("util/"),
// Polyfill needed by matrix-js-sdk/src/crypto
"buffer": require.resolve("buffer/"),
// Polyfill needed by sentry
"process/browser": require.resolve("process/browser"),
},
},
module: {
noParse: [
// for cross platform compatibility use [\\\/] as the path separator
// this ensures that the regex trips on both Windows and *nix
// don't parse the languages within highlight.js. They cause stack
// overflows (https://github.com/webpack/webpack/issues/1721), and
// there is no need for webpack to parse them - they can just be
// included as-is.
/highlight\.js[\\/]lib[\\/]languages/,
],
rules: [
{
test: /\.(ts|js)x?$/,
include: (f) => {
// our own source needs babel-ing
if (f.startsWith(path.resolve(__dirname, "src"))) return true;
// we use the original source files of js-sdk, so we need to
// run them through babel. Because the path tested is the resolved, absolute
// path, these could be anywhere thanks to yarn link. We must also not
// include node modules inside these modules, so we add 'src'.
if (f.startsWith(jsSdkSrcDir)) return true;
// Some of the syntax in this package is not understood by
// either webpack or our babel setup.
// When we do get to upgrade our current setup, this should
// probably be removed.
if (f.includes(path.join("@vector-im", "compound-web"))) return true;
// but we can't run all of our dependencies through babel (many of them still
// use module.exports which breaks if babel injects an 'include' for its
// polyfills: probably fixable but babeling all our dependencies is probably
// not necessary anyway). So, for anything else, don't babel.
return false;
},
loader: "babel-loader",
options: {
cacheDirectory: true,
plugins: enableMinification ? ["babel-plugin-jsx-remove-data-test-id"] : [],
},
},
{
test: /\.css$/,
use: [
MiniCssExtractPlugin.loader,
{
loader: "css-loader",
options: {
importLoaders: 1,
sourceMap: true,
esModule: false,
},
},
{
loader: "postcss-loader",
ident: "postcss",
options: {
sourceMap: true,
postcssOptions: () => ({
"plugins": [
// Note that we use significantly fewer plugins on the plain
// CSS parser. If we start to parse plain CSS, we end with all
// kinds of nasty problems (like stylesheets not loading).
//
// You might have noticed that we're also sending regular CSS
// through PostCSS. This looks weird, and in fact is probably
// not what you'd expect, however in order for our CSS build
// to work nicely we have to do this. Because down the line
// our SCSS stylesheets reference plain CSS we have to load
// the plain CSS through PostCSS so it can find it safely. This
// also acts like a babel-for-css by transpiling our (S)CSS
// down/up to the right browser support (prefixes, etc).
// Further, if we don't do this then PostCSS assumes that our
// plain CSS is SCSS and it really doesn't like that, even
// though plain CSS should be compatible. The chunking options
// at the top of this webpack config help group the SCSS and
// plain CSS together for the bundler.
require("postcss-simple-vars")(),
require("postcss-hexrgba")(),
// It's important that this plugin is last otherwise we end
// up with broken CSS.
require("postcss-preset-env")({ stage: 3, browsers: "last 2 versions" }),
],
"parser": "postcss-scss",
"local-plugins": true,
}),
},
},
],
},
{
test: /\.pcss$/,
use: [
MiniCssExtractPlugin.loader,
{
loader: "css-loader",
options: {
importLoaders: 1,
sourceMap: true,
esModule: false,
},
},
{
loader: "postcss-loader",
ident: "postcss",
options: {
sourceMap: true,
postcssOptions: () => ({
"plugins": [
// Note that we use slightly different plugins for PostCSS.
require("postcss-import")(),
require("postcss-mixins")(),
require("postcss-simple-vars")(),
require("postcss-nested")(),
require("postcss-easings")(),
require("postcss-hexrgba")(),
// It's important that this plugin is last otherwise we end
// up with broken CSS.
require("postcss-preset-env")({ stage: 3, browsers: "last 2 versions" }),
],
"parser": "postcss-scss",
"local-plugins": true,
}),
},
},
],
},
{
// Fix up the name of the opus-recorder worker (react-sdk dependency).
// We more or less just want it to be clear it's for opus and not something else.
test: /encoderWorker\.min\.js$/,
loader: "file-loader",
type: "javascript/auto",
options: {
// We deliberately override the name so it makes sense in debugging
name: "opus-encoderWorker.min.[hash:7].[ext]",
outputPath: ".",
},
},
{
// Ideally we should use the built-in worklet support in Webpack 5 with the syntax
// described in https://github.com/webpack/webpack.js.org/issues/6869. However, this
// doesn't currently appear to work with our public path setup. So we handle this
// with a custom loader instead.
test: /RecorderWorklet\.ts$/,
type: "javascript/auto",
use: [
{
loader: path.resolve("./recorder-worklet-loader.js"),
},
{
loader: "babel-loader",
},
],
},
{
// This is from the same place as the encoderWorker above, but only needed
// for Safari support.
test: /decoderWorker\.min\.js$/,
loader: "file-loader",
type: "javascript/auto", // https://github.com/webpack/webpack/issues/6725
options: {
// We deliberately override the name so it makes sense in debugging
name: "opus-decoderWorker.min.[hash:7].[ext]",
outputPath: ".",
},
},
{
// The decoderWorker wants to load its own wasm, rather than have webpack do it.
// We therefore use the `file-loader` to tell webpack to dump the contents to
// a separate file and return the name, and override the default `type` for `.wasm` files
// (which is `webassembly/experimental` under webpack 4) to stop webpack trying to interpret
// the filename as webassembly. (see also https://github.com/webpack/webpack/issues/6725)
test: /decoderWorker\.min\.wasm$/,
loader: "file-loader",
type: "javascript/auto",
options: {
// We deliberately don't change the name because the decoderWorker has this
// hardcoded. This is here to avoid the default wasm rule from adding a hash.
name: "decoderWorker.min.wasm",
outputPath: ".",
},
},
{
// This is from the same place as the encoderWorker above, but only needed
// for Safari support.
test: /waveWorker\.min\.js$/,
loader: "file-loader",
type: "javascript/auto", // https://github.com/webpack/webpack/issues/6725
options: {
// We deliberately override the name so it makes sense in debugging
name: "wave-encoderWorker.min.[hash:7].[ext]",
outputPath: ".",
},
},
{
// cache-bust languages.json file placed in
// element-web/webapp/i18n during build by copy-res.ts
test: /\.*languages.json$/,
type: "javascript/auto",
loader: "file-loader",
options: {
name: "i18n/[name].[hash:7].[ext]",
},
},
{
test: /\.svg$/,
issuer: /\.(js|ts|jsx|tsx|html)$/,
use: [
{
loader: "@svgr/webpack",
options: {
namedExport: "Icon",
svgProps: {
"role": "presentation",
"aria-hidden": true,
},
// props set on the svg will override defaults
expandProps: "end",
svgoConfig: {
plugins: [
{
name: "preset-default",
params: {
overrides: {
removeViewBox: false,
},
},
},
// generates a viewbox if missing
{ name: "removeDimensions" },
// https://github.com/facebook/docusaurus/issues/8297
{ name: "prefixIds" },
],
},
/**
* Forwards the React ref to the root SVG element
* Useful when using things like `asChild` in
* radix-ui
*/
ref: true,
esModule: false,
name: "[name].[hash:7].[ext]",
outputPath: getAssetOutputPath,
publicPath: function (url, resourcePath) {
const outputPath = getAssetOutputPath(url, resourcePath);
return toPublicPath(outputPath);
},
},
},
{
loader: "file-loader",
options: {
esModule: false,
name: "[name].[hash:7].[ext]",
outputPath: getAssetOutputPath,
publicPath: function (url, resourcePath) {
const outputPath = getAssetOutputPath(url, resourcePath);
return toPublicPath(outputPath);
},
},
},
],
},
{
test: /\.svg$/,
issuer: /\.(pcss|scss|css)$/,
use: [
{
loader: "file-loader",
options: {
esModule: false,
name: "[name].[hash:7].[ext]",
outputPath: getAssetOutputPath,
publicPath: function (url, resourcePath) {
// CSS image usages end up in the `bundles/[hash]` output
// directory, so we adjust the final path to navigate up
// twice.
const outputPath = getAssetOutputPath(url, resourcePath);
return toPublicPath(path.join("../..", outputPath));
},
},
},
],
},
{
test: /\.(gif|png|ttf|woff|woff2|xml|ico)$/,
// Use a content-based hash in the name so that we can set a long cache
// lifetime for assets while still delivering changes quickly.
oneOf: [
{
// Assets referenced in CSS files
issuer: /\.(pcss|scss|css)$/,
loader: "file-loader",
options: {
esModule: false,
name: "[name].[hash:7].[ext]",
outputPath: getAssetOutputPath,
publicPath: function (url, resourcePath) {
// CSS image usages end up in the `bundles/[hash]` output
// directory, so we adjust the final path to navigate up
// twice.
const outputPath = getAssetOutputPath(url, resourcePath);
return toPublicPath(path.join("../..", outputPath));
},
},
},
{
// Assets referenced in HTML and JS files
loader: "file-loader",
options: {
esModule: false,
name: "[name].[hash:7].[ext]",
outputPath: getAssetOutputPath,
publicPath: function (url, resourcePath) {
const outputPath = getAssetOutputPath(url, resourcePath);
return toPublicPath(outputPath);
},
},
},
],
},
].filter(Boolean),
},
plugins: [
...moduleReplacementPlugins,
// This exports our CSS using the splitChunks and loaders above.
new MiniCssExtractPlugin({
filename: "bundles/[fullhash]/[name].css",
chunkFilename: "bundles/[fullhash]/[name].css",
ignoreOrder: false, // Enable to remove warnings about conflicting order
}),
// This is the app's main entry point.
new HtmlWebpackPlugin({
template: "./src/vector/index.html",
// we inject the links ourselves via the template, because
// HtmlWebpackPlugin will screw up our formatting like the names
// of the themes and which chunks we actually care about.
inject: false,
excludeChunks: ["mobileguide", "usercontent", "jitsi", "serviceworker"],
minify: false,
templateParameters: {
og_image_url: ogImageUrl,
csp_extra_source: process.env.CSP_EXTRA_SOURCE ?? "",
},
}),
// This is the jitsi widget wrapper (embedded, so isolated stack)
new HtmlWebpackPlugin({
template: "./src/vector/jitsi/index.html",
filename: "jitsi.html",
minify: false,
chunks: ["jitsi"],
}),
// This is the mobile guide's entry point (separate for faster mobile loading)
new HtmlWebpackPlugin({
template: "./src/vector/mobile_guide/index.html",
filename: "mobile_guide/index.html",
minify: false,
chunks: ["mobileguide"],
}),
// These are the static error pages for when the javascript env is *really unsupported*
new HtmlWebpackPlugin({
template: "./src/vector/static/unable-to-load.html",
filename: "static/unable-to-load.html",
minify: false,
chunks: [],
}),
new HtmlWebpackPlugin({
template: "./src/vector/static/incompatible-browser.html",
filename: "static/incompatible-browser.html",
minify: false,
chunks: [],
}),
// This is the usercontent sandbox's entry point (separate for iframing)
new HtmlWebpackPlugin({
template: "./src/usercontent/index.html",
filename: "usercontent/index.html",
minify: false,
chunks: ["usercontent"],
}),
new HtmlWebpackInjectPreload({
files: [{ match: /.*Inter.*\.woff2$/ }],
}),
// Upload to sentry if sentry env is present
// This plugin throws an error on import on some platforms like ppc64le & s390x even if the plugin isn't called,
// so we require it conditionally.
process.env.SENTRY_DSN &&
require("@sentry/webpack-plugin").sentryWebpackPlugin({
release: process.env.VERSION,
sourcemaps: {
paths: "./webapp/bundles/**",
},
errorHandler: (err) => {
console.warn("Sentry CLI Plugin: " + err.message);
console.log(`::warning title=Sentry error::${err.message}`);
},
}),
new CopyWebpackPlugin({
patterns: [
"res/apple-app-site-association",
{ from: ".well-known/**", context: path.resolve(__dirname, "res") },
"res/jitsi_external_api.min.js",
"res/jitsi_external_api.min.js.LICENSE.txt",
"res/manifest.json",
"res/welcome.html",
{ from: "welcome/**", context: path.resolve(__dirname, "res") },
{ from: "themes/**", context: path.resolve(__dirname, "res") },
{ from: "vector-icons/**", context: path.resolve(__dirname, "res") },
{ from: "decoder-ring/**", context: path.resolve(__dirname, "res") },
{ from: "media/**", context: path.resolve(__dirname, "res/") },
{ from: "config.json", noErrorOnMissing: true },
"contribute.json",
],
}),
// Automatically load buffer & process modules as we use them without explicitly
// importing them
new webpack.ProvidePlugin({
Buffer: ["buffer", "Buffer"],
process: "process/browser",
}),
// We bake the version in so the app knows its version immediately
new webpack.DefinePlugin({ "process.env.VERSION": JSON.stringify(VERSION) }),
// But we also write it to a file which gets polled for update detection
new VersionFilePlugin({
outputFile: "version",
templateString: "<%= extras.VERSION %>",
extras: { VERSION },
}),
].filter(Boolean),
output: {
path: path.join(__dirname, "webapp"),
// The generated JS (and CSS, from the extraction plugin) are put in a
// unique subdirectory for the build. There will only be one such
// 'bundle' directory in the generated tarball; however, hosting
// servers can collect 'bundles' from multiple versions into one
// directory and symlink it into place - this allows users who loaded
// an older version of the application to continue to access webpack
// chunks even after the app is redeployed.
filename: "bundles/[fullhash]/[name].js",
chunkFilename: "bundles/[fullhash]/[name].js",
webassemblyModuleFilename: "bundles/[fullhash]/[modulehash].wasm",
},
// configuration for the webpack-dev-server
devServer: {
client: {
overlay: {
// Only show overlay on build errors as anything more can get annoying quickly
errors: true,
warnings: false,
runtimeErrors: false,
},
},
static: {
// Where to serve static assets from
directory: "./webapp",
},
devMiddleware: {
// Only output errors, warnings, or new compilations.
// This hides the massive list of modules.
stats: "minimal",
},
// Enable Hot Module Replacement without page refresh as a fallback in
// case of build failures
hot: "only",
// Disable host check
allowedHosts: "all",
},
};
};
/**
* Merge assets found via CSS and imports into a single tree, while also preserving
* directories under e.g. `res` or similar.
*
* @param {string} url The adjusted name of the file, such as `warning.1234567.svg`.
* @param {string} resourcePath The absolute path to the source file with unmodified name.
* @return {string} The returned paths will look like `img/warning.1234567.svg`.
*/
function getAssetOutputPath(url, resourcePath) {
const isKaTeX = resourcePath.includes("KaTeX");
// `res` is the parent dir for our own assets in various layers
// `dist` is the parent dir for KaTeX assets
const prefix = /^.*[/\\](dist|res)[/\\]/;
/**
* Only needed for https://github.com/element-hq/element-web/pull/15939
* If keeping this, we are not able to load external assets such as SVG
* images coming from @vector-im/compound-web.
*/
if (isKaTeX && !resourcePath.match(prefix)) {
throw new Error(`Unexpected asset path: ${resourcePath}`);
}
let outputDir = path.dirname(resourcePath).replace(prefix, "");
/**
* Imports from Compound are "absolute", we need to strip out the prefix
* coming before the npm package name.
*
* This logic is scoped to compound packages for now as they are the only
* package that imports external assets. This might need to be made more
* generic in the future
*/
const compoundImportsPrefix = /@vector-im(?:\\|\/)compound-(.*?)(?:\\|\/)/;
const compoundMatch = outputDir.match(compoundImportsPrefix);
if (compoundMatch) {
outputDir = outputDir.substring(compoundMatch.index + compoundMatch[0].length);
}
if (isKaTeX) {
// Add a clearly named directory segment, rather than leaving the KaTeX
// assets loose in each asset type directory.
outputDir = path.join(outputDir, "KaTeX");
}
return path.join(outputDir, path.basename(url));
}
/**
* Convert path to public path format, which always uses forward slashes, since it will
* be placed directly into things like CSS files.
*
* @param {string} path Some path to a file.
* @returns {string} converted path
*/
function toPublicPath(path) {
return path.replace(/\\/g, "/");
}