120 lines
3.2 KiB
JavaScript
120 lines
3.2 KiB
JavaScript
/* eslint-disable max-classes-per-file */
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const path = require('path');
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const { History, HistoryWithTTL } = require('./history');
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const log = require('./log');
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const onRequestEntryPoint = (callback) => {
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return (req, res, next) => {
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const fileName = path.basename(req.url);
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/**
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* We are only interested in files that have a name like `pages.foo.bar.chunk.js`
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* because those are the ones corresponding to our entry points.
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*
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* This filters out hot update files that are for example named "pages.foo.bar.[hash].hot-update.js"
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*/
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if (fileName.startsWith('pages.') && fileName.endsWith('.chunk.js')) {
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const entryPoint = fileName.replace(/\.chunk\.js$/, '');
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callback(entryPoint);
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}
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next();
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};
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};
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/**
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* The NoopCompiler does nothing, following the null object pattern.
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*/
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class NoopCompiler {
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constructor() {
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this.enabled = false;
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}
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// eslint-disable-next-line class-methods-use-this
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filterEntryPoints(entryPoints) {
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return entryPoints;
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}
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// eslint-disable-next-line class-methods-use-this
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logStatus() {}
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// eslint-disable-next-line class-methods-use-this
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createMiddleware() {
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return null;
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}
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}
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/**
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* The HistoryOnlyCompiler only records which entry points have been requested.
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* This is so that if the user disables incremental compilation, history is
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* still recorded. If they later enable incremental compilation, that history
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* can be used.
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*/
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class HistoryOnlyCompiler extends NoopCompiler {
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constructor(historyFilePath) {
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super();
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this.history = new History(historyFilePath);
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}
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createMiddleware() {
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return onRequestEntryPoint((entryPoint) => {
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this.history.onRequestEntryPoint(entryPoint);
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});
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}
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}
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// If we force a recompile immediately, the page reload doesn't seem to work.
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// Five seconds seem to work fine and the user can read the message
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const TIMEOUT = 5000;
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/**
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* The IncrementalWebpackCompiler tracks which entry points have been
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* requested, and only compiles entry points visited within the last `ttl`
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* days.
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*/
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class IncrementalWebpackCompiler {
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constructor(historyFilePath, ttl) {
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this.enabled = true;
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this.history = new HistoryWithTTL(historyFilePath, ttl);
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}
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filterEntryPoints(entrypoints) {
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return Object.fromEntries(
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Object.entries(entrypoints).map(([entryPoint, paths]) => {
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if (this.history.isRecentlyVisited(entryPoint)) {
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return [entryPoint, paths];
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}
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return [entryPoint, ['./webpack_non_compiled_placeholder.js']];
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}),
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);
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}
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logStatus(totalCount) {
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log(`Currently compiling route entrypoints: ${this.history.size} of ${totalCount}`);
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}
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createMiddleware(devServer) {
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return onRequestEntryPoint((entryPoint) => {
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const wasVisitedRecently = this.history.onRequestEntryPoint(entryPoint);
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if (!wasVisitedRecently) {
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log(`Have not visited ${entryPoint} recently. Adding to compilation.`);
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setTimeout(() => {
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devServer.invalidate(() => {
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if (devServer.sockets) {
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devServer.sendMessage(devServer.webSocketServer.clients, 'static-changed');
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}
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});
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}, TIMEOUT);
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}
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});
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}
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}
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module.exports = {
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NoopCompiler,
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HistoryOnlyCompiler,
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IncrementalWebpackCompiler,
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};
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