2e32aa8630
* Ensure correct key order * Fix bug * Format this document while we're at it
95 lines
3 KiB
JavaScript
95 lines
3 KiB
JavaScript
import { RawSource } from 'webpack-sources'
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import {
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BUILD_MANIFEST,
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ROUTE_NAME_REGEX,
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IS_BUNDLED_PAGE_REGEX,
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CLIENT_STATIC_FILES_RUNTIME_MAIN
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} from 'next-server/constants'
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// This plugin creates a build-manifest.json for all assets that are being output
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// It has a mapping of "entry" filename to real filename. Because the real filename can be hashed in production
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export default class BuildManifestPlugin {
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apply (compiler) {
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compiler.hooks.emit.tapAsync(
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'NextJsBuildManifest',
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(compilation, callback) => {
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const { chunks } = compilation
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const assetMap = { devFiles: [], pages: {} }
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const mainJsChunk = chunks.find(
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c => c.name === CLIENT_STATIC_FILES_RUNTIME_MAIN
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)
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const mainJsFiles =
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mainJsChunk && mainJsChunk.files.length > 0
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? mainJsChunk.files.filter(file => /\.js$/.test(file))
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: []
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for (const filePath of Object.keys(compilation.assets)) {
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const path = filePath.replace(/\\/g, '/')
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if (/^static\/development\/dll\//.test(path)) {
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assetMap.devFiles.push(path)
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}
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}
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// compilation.entrypoints is a Map object, so iterating over it 0 is the key and 1 is the value
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for (const [, entrypoint] of compilation.entrypoints.entries()) {
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const result = ROUTE_NAME_REGEX.exec(entrypoint.name)
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if (!result) {
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continue
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}
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const pagePath = result[1]
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if (!pagePath) {
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continue
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}
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const filesForEntry = []
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for (const chunk of entrypoint.chunks) {
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// If there's no name or no files
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if (!chunk.name || !chunk.files) {
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continue
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}
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for (const file of chunk.files) {
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if (/\.map$/.test(file) || /\.hot-update\.js$/.test(file)) {
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continue
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}
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// Only `.js` and `.css` files are added for now. In the future we can also handle other file types.
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if (!/\.js$/.test(file) && !/\.css$/.test(file)) {
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continue
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}
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// The page bundles are manually added to _document.js as they need extra properties
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if (IS_BUNDLED_PAGE_REGEX.exec(file)) {
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continue
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}
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filesForEntry.push(file.replace(/\\/g, '/'))
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}
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}
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assetMap.pages[`/${pagePath.replace(/\\/g, '/')}`] = [
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...filesForEntry,
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...mainJsFiles
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]
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}
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if (typeof assetMap.pages['/index'] !== 'undefined') {
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assetMap.pages['/'] = assetMap.pages['/index']
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}
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assetMap.pages = Object.keys(assetMap.pages)
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.sort()
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// eslint-disable-next-line
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.reduce((a, c) => ((a[c] = assetMap.pages[c]), a), {})
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compilation.assets[BUILD_MANIFEST] = new RawSource(
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JSON.stringify(assetMap, null, 2)
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)
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callback()
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}
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)
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}
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}
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