vue hello world项目
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
const Template = require("../Template");
const { isSubset } = require("../util/SetHelpers");
const { getAllChunks } = require("./ChunkHelpers");
/** @typedef {import("../util/Hash")} Hash */
/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../Compilation")} Compilation */
/** @typedef {import("../ChunkGraph")} ChunkGraph */
/** @typedef {import("../ChunkGraph").EntryModuleWithChunkGroup} EntryModuleWithChunkGroup */
/** @typedef {import("../ChunkGroup")} ChunkGroup */
/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
/** @typedef {(string|number)[]} EntryItem */
const EXPORT_PREFIX = "var __webpack_exports__ = ";
/**
* @param {ChunkGraph} chunkGraph chunkGraph
* @param {RuntimeTemplate} runtimeTemplate runtimeTemplate
* @param {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__(${JSON.stringify(id)})`;
};
const outputCombination = (chunks, moduleIds, final) => {
if (chunks.size === 0) {
runtime.push(
`${final ? EXPORT_PREFIX : ""}(${moduleIds.map(runModule).join(", ")});`
);
} else {
const fn = runtimeTemplate.returningFunction(
moduleIds.map(runModule).join(", ")
);
runtime.push(
`${final && !passive ? EXPORT_PREFIX : ""}${
passive
? RuntimeGlobals.onChunksLoaded
: RuntimeGlobals.startupEntrypoint
}(0, ${JSON.stringify(Array.from(chunks, c => c.id))}, ${fn});`
);
if (final && passive) {
runtime.push(`${EXPORT_PREFIX}${RuntimeGlobals.onChunksLoaded}();`);
}
}
};
let currentChunks = undefined;
let currentModuleIds = undefined;
for (const [module, entrypoint] of entries) {
const runtimeChunk = entrypoint.getRuntimeChunk();
const moduleId = chunkGraph.getModuleId(module);
const chunks = getAllChunks(entrypoint, chunk, runtimeChunk);
if (
currentChunks &&
currentChunks.size === chunks.size &&
isSubset(currentChunks, chunks)
) {
currentModuleIds.push(moduleId);
} else {
if (currentChunks) {
outputCombination(currentChunks, currentModuleIds);
}
currentChunks = chunks;
currentModuleIds = [moduleId];
}
}
// output current modules with export prefix
if (currentChunks) {
outputCombination(currentChunks, currentModuleIds, true);
}
runtime.push("");
return Template.asString(runtime);
};
/**
* @param {Hash} hash the hash to update
* @param {ChunkGraph} chunkGraph chunkGraph
* @param {EntryModuleWithChunkGroup[]} entries entries
* @param {Chunk} chunk chunk
* @returns {void}
*/
exports.updateHashForEntryStartup = (hash, chunkGraph, entries, chunk) => {
for (const [module, entrypoint] of entries) {
const runtimeChunk = entrypoint.getRuntimeChunk();
const moduleId = chunkGraph.getModuleId(module);
hash.update(`${moduleId}`);
for (const c of getAllChunks(entrypoint, chunk, runtimeChunk))
hash.update(`${c.id}`);
}
};
/**
* @param {Chunk} chunk the chunk
* @param {ChunkGraph} chunkGraph the chunk graph
* @param {function(Chunk, ChunkGraph): boolean} filterFn filter function
* @returns {Set<number | string>} initially fulfilled chunk ids
*/
exports.getInitialChunkIds = (chunk, chunkGraph, filterFn) => {
const initialChunkIds = new Set(chunk.ids);
for (const c of chunk.getAllInitialChunks()) {
if (c === chunk || filterFn(c, chunkGraph)) continue;
for (const id of c.ids) initialChunkIds.add(id);
}
return initialChunkIds;
};