mirror of https://github.com/webpack/webpack.git
112 lines
3.9 KiB
JavaScript
112 lines
3.9 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Jason Anderson @diurnalist
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*/
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"use strict";
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const REGEXP_HASH = /\[hash(?::(\d+))?\]/gi,
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REGEXP_CHUNKHASH = /\[chunkhash(?::(\d+))?\]/gi,
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REGEXP_NAME = /\[name\]/gi,
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REGEXP_ID = /\[id\]/gi,
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REGEXP_FILE = /\[file\]/gi,
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REGEXP_QUERY = /\[query\]/gi,
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REGEXP_FILEBASE = /\[filebase\]/gi;
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// Using global RegExp for .test is dangerous
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// We use a normal RegExp instead of .test
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const REGEXP_HASH_FOR_TEST = new RegExp(REGEXP_HASH.source, "i"),
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REGEXP_CHUNKHASH_FOR_TEST = new RegExp(REGEXP_CHUNKHASH.source, "i"),
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REGEXP_NAME_FOR_TEST = new RegExp(REGEXP_NAME.source, "i");
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// Backwards compatibility; expose regexes on Template object
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const Template = require("./Template");
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Template.REGEXP_HASH = REGEXP_HASH;
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Template.REGEXP_CHUNKHASH = REGEXP_CHUNKHASH;
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Template.REGEXP_NAME = REGEXP_NAME;
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Template.REGEXP_ID = REGEXP_ID;
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Template.REGEXP_FILE = REGEXP_FILE;
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Template.REGEXP_QUERY = REGEXP_QUERY;
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Template.REGEXP_FILEBASE = REGEXP_FILEBASE;
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const withHashLength = (replacer, handlerFn) => {
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return function(_, hashLength) {
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const length = hashLength && parseInt(hashLength, 10);
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if(length && handlerFn) {
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return handlerFn(length);
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}
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const hash = replacer.apply(this, arguments);
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return length ? hash.slice(0, length) : hash;
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};
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}
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const getReplacer = (value, allowEmpty) => {
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return function(match) {
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// last argument in replacer is the entire input string
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const input = arguments[arguments.length - 1];
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if(value == null) {
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if(!allowEmpty) throw new Error(`Path variable ${match} not implemented in this context: ${input}`);
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return "";
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} else {
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return `${value}`;
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}
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};
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}
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const replacePathVariables = (path, data) => {
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const chunk = data.chunk;
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const chunkId = chunk && chunk.id;
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const chunkName = chunk && (chunk.name || chunk.id);
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const chunkHash = chunk && (chunk.renderedHash || chunk.hash);
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const chunkHashWithLength = chunk && chunk.hashWithLength;
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if(data.noChunkHash && REGEXP_CHUNKHASH_FOR_TEST.test(path)) {
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throw new Error(`Cannot use [chunkhash] for chunk in '${path}' (use [hash] instead)`);
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}
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return path
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.replace(REGEXP_HASH, withHashLength(getReplacer(data.hash), data.hashWithLength))
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.replace(REGEXP_CHUNKHASH, withHashLength(getReplacer(chunkHash), chunkHashWithLength))
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.replace(REGEXP_ID, getReplacer(chunkId))
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.replace(REGEXP_NAME, getReplacer(chunkName))
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.replace(REGEXP_FILE, getReplacer(data.filename))
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.replace(REGEXP_FILEBASE, getReplacer(data.basename))
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// query is optional, it's OK if it's in a path but there's nothing to replace it with
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.replace(REGEXP_QUERY, getReplacer(data.query, true));
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}
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class TemplatedPathPlugin {
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apply(compiler) {
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compiler.plugin("compilation", compilation => {
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const mainTemplate = compilation.mainTemplate;
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mainTemplate.plugin("asset-path", replacePathVariables);
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mainTemplate.plugin("global-hash", function(chunk, paths) {
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const outputOptions = this.outputOptions;
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const publicPath = outputOptions.publicPath || "";
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const filename = outputOptions.filename || "";
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const chunkFilename = outputOptions.chunkFilename || outputOptions.filename;
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if(REGEXP_HASH_FOR_TEST.test(publicPath) || REGEXP_CHUNKHASH_FOR_TEST.test(publicPath) || REGEXP_NAME_FOR_TEST.test(publicPath))
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return true;
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if(REGEXP_HASH_FOR_TEST.test(filename))
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return true;
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if(REGEXP_HASH_FOR_TEST.test(chunkFilename))
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return true;
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if(REGEXP_HASH_FOR_TEST.test(paths.join("|")))
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return true;
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});
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mainTemplate.plugin("hash-for-chunk", function(hash, chunk) {
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const outputOptions = this.outputOptions;
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const chunkFilename = outputOptions.chunkFilename || outputOptions.filename;
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if(REGEXP_CHUNKHASH_FOR_TEST.test(chunkFilename))
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hash.update(JSON.stringify(chunk.getChunkMaps(true, true).hash));
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if(REGEXP_NAME_FOR_TEST.test(chunkFilename))
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hash.update(JSON.stringify(chunk.getChunkMaps(true, true).name));
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});
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});
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}
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}
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module.exports = TemplatedPathPlugin;
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