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// Source: https://github.com/mondaychen/devtools-ignore-webpack-plugin/blob/e35ce41d9606a92a455ef247f509a1c2ccab5778/src/index.ts
// eslint-disable-next-line import/no-extraneous-dependencies -- this is a dev-only file
const webpack = require('@rspack/core')
// Following the naming conventions from
// https://tc39.es/source-map/#source-map-format
const IGNORE_LIST = 'ignoreList'
const PLUGIN_NAME = 'devtools-ignore-plugin'
function defaultShouldIgnorePath(path) {
return path.includes('/node_modules/') || path.includes('/webpack/')
}
function defaultIsSourceMapAsset(name) {
return name.endsWith('.map')
}
/**
* This plugin adds a field to source maps that identifies which sources are
* vendored or runtime-injected (aka third-party) sources. These are consumed by
* Chrome DevTools to automatically ignore-list sources.
*/
module.exports = class DevToolsIgnorePlugin {
options
constructor(options = {}) {
this.options = {
shouldIgnorePath: options.shouldIgnorePath ?? defaultShouldIgnorePath,
isSourceMapAsset: options.isSourceMapAsset ?? defaultIsSourceMapAsset,
}
}
apply(compiler) {
const { RawSource } = compiler.webpack.sources
compiler.hooks.compilation.tap(PLUGIN_NAME, (compilation) => {
compilation.hooks.processAssets.tap(
{
name: PLUGIN_NAME,
stage: webpack.Compilation.PROCESS_ASSETS_STAGE_DEV_TOOLING,
additionalAssets: true,
},
(assets) => {
for (const [name, asset] of Object.entries(assets)) {
// Instead of using `asset.map()` to fetch the source maps from
// SourceMapSource assets, process them directly as a RawSource.
// This is because `.map()` is slow and can take several seconds.
if (!this.options.isSourceMapAsset(name)) {
// Ignore non source map files.
continue
}
const mapContent = asset.source().toString()
if (!mapContent) {
continue
}
const sourcemap = JSON.parse(mapContent)
const ignoreList = []
for (const [index, path] of sourcemap.sources.entries()) {
if (this.options.shouldIgnorePath(path)) {
ignoreList.push(index)
}
}
sourcemap[IGNORE_LIST] = ignoreList
compilation.updateAsset(
name,
new RawSource(JSON.stringify(sourcemap))
)
}
}
)
})
}
}
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