mirror of https://github.com/webpack/webpack.git
103 lines
2.8 KiB
JavaScript
103 lines
2.8 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const asyncLib = require("neo-async");
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class CachePlugin {
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constructor(cache) {
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this.cache = cache || {};
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this.FS_ACCURACY = 2000;
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}
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apply(compiler) {
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if (Array.isArray(compiler.compilers)) {
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compiler.compilers.forEach((c, idx) => {
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new CachePlugin((this.cache[idx] = this.cache[idx] || {})).apply(c);
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});
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} else {
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const registerCacheToCompiler = (compiler, cache) => {
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compiler.hooks.thisCompilation.tap("CachePlugin", compilation => {
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compilation.cache = cache;
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compilation.hooks.childCompiler.tap(
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"CachePlugin",
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(childCompiler, compilerName, compilerIndex) => {
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if (cache) {
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let childCache;
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if (!cache.children) {
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cache.children = {};
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}
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if (!cache.children[compilerName]) {
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cache.children[compilerName] = [];
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}
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if (cache.children[compilerName][compilerIndex]) {
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childCache = cache.children[compilerName][compilerIndex];
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} else {
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cache.children[compilerName].push((childCache = {}));
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}
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registerCacheToCompiler(childCompiler, childCache);
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}
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}
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);
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});
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};
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registerCacheToCompiler(compiler, this.cache);
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compiler.hooks.watchRun.tap("CachePlugin", () => {
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this.watching = true;
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});
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compiler.hooks.run.tapAsync("CachePlugin", (compiler, callback) => {
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if (!compiler._lastCompilationFileDependencies) {
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return callback();
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}
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const fs = compiler.inputFileSystem;
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const fileTs = (compiler.fileTimestamps = new Map());
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asyncLib.forEach(
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compiler._lastCompilationFileDependencies,
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(file, callback) => {
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fs.stat(file, (err, stat) => {
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if (err) {
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if (err.code === "ENOENT") return callback();
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return callback(err);
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}
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if (stat.mtime) this.applyMtime(+stat.mtime);
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fileTs.set(file, +stat.mtime || Infinity);
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callback();
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});
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},
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err => {
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if (err) return callback(err);
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for (const [file, ts] of fileTs) {
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fileTs.set(file, ts + this.FS_ACCURACY);
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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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compiler.hooks.afterCompile.tap("CachePlugin", compilation => {
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compilation.compiler._lastCompilationFileDependencies =
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compilation.fileDependencies;
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compilation.compiler._lastCompilationContextDependencies =
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compilation.contextDependencies;
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});
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}
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}
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/* istanbul ignore next */
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applyMtime(mtime) {
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if (this.FS_ACCURACY > 1 && mtime % 2 !== 0) this.FS_ACCURACY = 1;
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else if (this.FS_ACCURACY > 10 && mtime % 20 !== 0) this.FS_ACCURACY = 10;
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else if (this.FS_ACCURACY > 100 && mtime % 200 !== 0)
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this.FS_ACCURACY = 100;
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else if (this.FS_ACCURACY > 1000 && mtime % 2000 !== 0)
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this.FS_ACCURACY = 1000;
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}
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}
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module.exports = CachePlugin;
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