mirror of https://github.com/webpack/webpack.git
58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const Cache = require("../Cache");
|
|
|
|
/** @typedef {import("../Cache").Data} Data */
|
|
/** @typedef {import("../Cache").Etag} Etag */
|
|
/** @typedef {import("../Compiler")} Compiler */
|
|
|
|
class MemoryCachePlugin {
|
|
/**
|
|
* Apply the plugin
|
|
* @param {Compiler} compiler the compiler instance
|
|
* @returns {void}
|
|
*/
|
|
apply(compiler) {
|
|
/** @type {Map<string, { etag: Etag | null, data: Data } | null>} */
|
|
const cache = new Map();
|
|
compiler.cache.hooks.store.tap(
|
|
{ name: "MemoryCachePlugin", stage: Cache.STAGE_MEMORY },
|
|
(identifier, etag, data) => {
|
|
cache.set(identifier, { etag, data });
|
|
}
|
|
);
|
|
compiler.cache.hooks.get.tap(
|
|
{ name: "MemoryCachePlugin", stage: Cache.STAGE_MEMORY },
|
|
(identifier, etag, gotHandlers) => {
|
|
const cacheEntry = cache.get(identifier);
|
|
if (cacheEntry === null) {
|
|
return null;
|
|
} else if (cacheEntry !== undefined) {
|
|
return cacheEntry.etag === etag ? cacheEntry.data : null;
|
|
}
|
|
gotHandlers.push((result, callback) => {
|
|
if (result === undefined) {
|
|
cache.set(identifier, null);
|
|
} else {
|
|
cache.set(identifier, { etag, data: result });
|
|
}
|
|
return callback();
|
|
});
|
|
}
|
|
);
|
|
compiler.cache.hooks.shutdown.tap(
|
|
{ name: "MemoryCachePlugin", stage: Cache.STAGE_MEMORY },
|
|
() => {
|
|
cache.clear();
|
|
}
|
|
);
|
|
}
|
|
}
|
|
|
|
module.exports = MemoryCachePlugin;
|