mirror of https://github.com/webpack/webpack.git
135 lines
3.9 KiB
JavaScript
135 lines
3.9 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const Entrypoint = require("../Entrypoint");
|
|
const RuntimeGlobals = require("../RuntimeGlobals");
|
|
const Template = require("../Template");
|
|
const { isSubset } = require("../util/SetHelpers");
|
|
const { chunkHasJs } = require("./JavascriptModulesPlugin");
|
|
|
|
/** @typedef {import("../Chunk")} Chunk */
|
|
/** @typedef {import("../Compilation")} Compilation */
|
|
/** @typedef {import("../ChunkGraph")} ChunkGraph */
|
|
/** @typedef {import("../ChunkGroup")} ChunkGroup */
|
|
/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
|
|
/** @typedef {(string|number)[]} EntryItem */
|
|
|
|
// TODO move to this file to ../javascript/ChunkHelpers.js
|
|
|
|
/**
|
|
* @param {Entrypoint} entrypoint a chunk group
|
|
* @param {Chunk} excludedChunk1 current chunk which is excluded
|
|
* @param {Chunk} excludedChunk2 runtime chunk which is excluded
|
|
* @returns {Set<Chunk>} chunks
|
|
*/
|
|
const getAllChunks = (entrypoint, excludedChunk1, excludedChunk2) => {
|
|
const queue = new Set([entrypoint]);
|
|
const chunks = new Set();
|
|
for (const entrypoint of queue) {
|
|
for (const chunk of entrypoint.chunks) {
|
|
if (chunk === excludedChunk1) continue;
|
|
if (chunk === excludedChunk2) continue;
|
|
chunks.add(chunk);
|
|
}
|
|
for (const parent of entrypoint.parentsIterable) {
|
|
if (parent instanceof Entrypoint) queue.add(parent);
|
|
}
|
|
}
|
|
return chunks;
|
|
};
|
|
|
|
const EXPORT_PREFIX = "var __webpack_exports__ = ";
|
|
|
|
/**
|
|
* @param {ChunkGraph} chunkGraph chunkGraph
|
|
* @param {RuntimeTemplate} runtimeTemplate runtimeTemplate
|
|
* @param {import("../ChunkGraph").EntryModuleWithChunkGroup[]} entries entries
|
|
* @param {Chunk} chunk chunk
|
|
* @param {boolean} passive true: passive startup with on chunks loaded
|
|
* @returns {string} runtime code
|
|
*/
|
|
exports.generateEntryStartup = (
|
|
chunkGraph,
|
|
runtimeTemplate,
|
|
entries,
|
|
chunk,
|
|
passive
|
|
) => {
|
|
/** @type {string[]} */
|
|
const runtime = [
|
|
`var __webpack_exec__ = ${runtimeTemplate.returningFunction(
|
|
`__webpack_require__(${RuntimeGlobals.entryModuleId} = moduleId)`,
|
|
"moduleId"
|
|
)}`
|
|
];
|
|
|
|
const runModule = id => {
|
|
return `__webpack_exec__(${JSON.stringify(id)})`;
|
|
};
|
|
const outputCombination = (chunks, moduleIds, final) => {
|
|
const old = final ? "undefined" : "0";
|
|
const prefix = final ? EXPORT_PREFIX : "";
|
|
if (chunks.size === 0) {
|
|
runtime.push(`${prefix}(${moduleIds.map(runModule).join(", ")});`);
|
|
} else {
|
|
const fn = runtimeTemplate.returningFunction(
|
|
moduleIds.map(runModule).join(", ")
|
|
);
|
|
runtime.push(
|
|
`${prefix}${
|
|
passive
|
|
? RuntimeGlobals.onChunksLoaded
|
|
: RuntimeGlobals.startupEntrypoint
|
|
}(${old}, ${JSON.stringify(Array.from(chunks, c => c.id))}, ${fn});`
|
|
);
|
|
}
|
|
};
|
|
|
|
let currentChunks = undefined;
|
|
let currentModuleIds = undefined;
|
|
|
|
for (const [module, entrypoint] of entries) {
|
|
const runtimeChunk = entrypoint.getRuntimeChunk();
|
|
const moduleId = chunkGraph.getModuleId(module);
|
|
const chunks = getAllChunks(entrypoint, chunk, runtimeChunk);
|
|
if (
|
|
currentChunks &&
|
|
currentChunks.size === chunks.size &&
|
|
isSubset(currentChunks, chunks)
|
|
) {
|
|
currentModuleIds.push(moduleId);
|
|
} else {
|
|
if (currentChunks) {
|
|
outputCombination(currentChunks, currentModuleIds);
|
|
}
|
|
currentChunks = chunks;
|
|
currentModuleIds = [moduleId];
|
|
}
|
|
}
|
|
|
|
// output current modules with export prefix
|
|
if (currentChunks) {
|
|
outputCombination(currentChunks, currentModuleIds, true);
|
|
}
|
|
runtime.push("");
|
|
return Template.asString(runtime);
|
|
};
|
|
|
|
/**
|
|
* @param {Chunk} chunk the chunk
|
|
* @param {ChunkGraph} chunkGraph the chunk graph
|
|
* @returns {Set<number | string>} initially fulfilled chunk ids
|
|
*/
|
|
exports.getInitialChunkIds = (chunk, chunkGraph) => {
|
|
const initialChunkIds = new Set(chunk.ids);
|
|
for (const c of chunk.getAllInitialChunks()) {
|
|
if (c === chunk || chunkHasJs(c, chunkGraph)) continue;
|
|
for (const id of c.ids) initialChunkIds.add(id);
|
|
}
|
|
return initialChunkIds;
|
|
};
|