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57 lines
1.5 KiB
57 lines
1.5 KiB
/* |
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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 Cache = require("../Cache"); |
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/** @typedef {import("webpack-sources").Source} Source */ |
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/** @typedef {import("../Cache").Etag} Etag */ |
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/** @typedef {import("../Compiler")} Compiler */ |
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/** @typedef {import("../Module")} Module */ |
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class MemoryCachePlugin { |
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/** |
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* Apply the plugin |
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* @param {Compiler} compiler the compiler instance |
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* @returns {void} |
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*/ |
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apply(compiler) { |
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/** @type {Map<string, { etag: Etag | null, data: any }>} */ |
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const cache = new Map(); |
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compiler.cache.hooks.store.tap( |
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{ name: "MemoryCachePlugin", stage: Cache.STAGE_MEMORY }, |
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(identifier, etag, data) => { |
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cache.set(identifier, { etag, data }); |
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} |
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); |
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compiler.cache.hooks.get.tap( |
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{ name: "MemoryCachePlugin", stage: Cache.STAGE_MEMORY }, |
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(identifier, etag, gotHandlers) => { |
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const cacheEntry = cache.get(identifier); |
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if (cacheEntry === null) { |
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return null; |
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} else if (cacheEntry !== undefined) { |
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return cacheEntry.etag === etag ? cacheEntry.data : null; |
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} |
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gotHandlers.push((result, callback) => { |
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if (result === undefined) { |
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cache.set(identifier, null); |
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} else { |
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cache.set(identifier, { etag, data: result }); |
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} |
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return callback(); |
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}); |
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} |
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); |
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compiler.cache.hooks.shutdown.tap( |
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{ name: "MemoryCachePlugin", stage: Cache.STAGE_MEMORY }, |
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() => { |
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cache.clear(); |
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} |
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); |
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} |
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} |
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module.exports = MemoryCachePlugin;
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