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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const {
compareModulesByPreOrderIndexOrIdentifier
} = require("../util/comparators");
const createSchemaValidation = require("../util/create-schema-validation");
const createHash = require("../util/createHash");
const { getUsedModuleIds, getFullModuleName } = require("./IdHelpers");
/** @typedef {import("../../declarations/plugins/HashedModuleIdsPlugin").HashedModuleIdsPluginOptions} HashedModuleIdsPluginOptions */
const validate = createSchemaValidation(
require("../../schemas/plugins/HashedModuleIdsPlugin.check.js"),
() => require("../../schemas/plugins/HashedModuleIdsPlugin.json"),
{
name: "Hashed Module Ids Plugin",
baseDataPath: "options"
}
);
class HashedModuleIdsPlugin {
/**
* @param {HashedModuleIdsPluginOptions=} options options object
*/
constructor(options = {}) {
validate(options);
/** @type {HashedModuleIdsPluginOptions} */
this.options = {
context: null,
hashFunction: "md4",
hashDigest: "base64",
hashDigestLength: 4,
...options
};
}
apply(compiler) {
const options = this.options;
compiler.hooks.compilation.tap("HashedModuleIdsPlugin", compilation => {
compilation.hooks.moduleIds.tap("HashedModuleIdsPlugin", modules => {
const chunkGraph = compilation.chunkGraph;
const context = this.options.context
? this.options.context
: compiler.context;
const usedIds = getUsedModuleIds(compilation);
const modulesInNaturalOrder = Array.from(modules)
.filter(m => {
if (!m.needId) return false;
if (chunkGraph.getNumberOfModuleChunks(m) === 0) return false;
return chunkGraph.getModuleId(module) === null;
})
.sort(
compareModulesByPreOrderIndexOrIdentifier(compilation.moduleGraph)
);
for (const module of modulesInNaturalOrder) {
const ident = getFullModuleName(module, context, compiler.root);
const hash = createHash(options.hashFunction);
hash.update(ident || "");
const hashId = /** @type {string} */ (
hash.digest(options.hashDigest)
);
let len = options.hashDigestLength;
while (usedIds.has(hashId.substr(0, len))) len++;
const moduleId = hashId.substr(0, len);
chunkGraph.setModuleId(module, moduleId);
usedIds.add(moduleId);
}
});
});
}
}
module.exports = HashedModuleIdsPlugin;