chushihua
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const Template = require("../Template");
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module.exports = class NodeMainTemplatePlugin {
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constructor(asyncChunkLoading) {
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this.asyncChunkLoading = asyncChunkLoading;
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}
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apply(mainTemplate) {
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const asyncChunkLoading = this.asyncChunkLoading;
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mainTemplate.plugin("local-vars", function(source, chunk) {
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if(chunk.chunks.length > 0) {
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return this.asString([
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source,
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"",
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"// object to store loaded chunks",
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"// \"0\" means \"already loaded\"",
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"var installedChunks = {",
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this.indent(chunk.ids.map((id) => `${id}: 0`).join(",\n")),
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"};"
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]);
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}
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return source;
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});
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mainTemplate.plugin("require-extensions", function(source, chunk) {
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if(chunk.chunks.length > 0) {
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return this.asString([
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source,
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"",
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"// uncatched error handler for webpack runtime",
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`${this.requireFn}.oe = function(err) {`,
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this.indent([
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"process.nextTick(function() {",
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this.indent("throw err; // catch this error by using System.import().catch()"),
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"});"
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]),
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"};"
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]);
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}
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return source;
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});
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mainTemplate.plugin("require-ensure", function(_, chunk, hash) {
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const chunkFilename = this.outputOptions.chunkFilename;
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const chunkMaps = chunk.getChunkMaps();
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const insertMoreModules = [
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"var moreModules = chunk.modules, chunkIds = chunk.ids;",
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"for(var moduleId in moreModules) {",
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this.indent(this.renderAddModule(hash, chunk, "moduleId", "moreModules[moduleId]")),
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"}"
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];
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if(asyncChunkLoading) {
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return this.asString([
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"// \"0\" is the signal for \"already loaded\"",
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"if(installedChunks[chunkId] === 0)",
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this.indent([
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"return Promise.resolve();"
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]),
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"// array of [resolve, reject, promise] means \"currently loading\"",
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"if(installedChunks[chunkId])",
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this.indent([
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"return installedChunks[chunkId][2];"
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]),
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"// load the chunk and return promise to it",
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"var promise = new Promise(function(resolve, reject) {",
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this.indent([
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"installedChunks[chunkId] = [resolve, reject];",
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"var filename = __dirname + " + this.applyPluginsWaterfall("asset-path", JSON.stringify(`/${chunkFilename}`), {
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hash: `" + ${this.renderCurrentHashCode(hash)} + "`,
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hashWithLength: (length) => `" + ${this.renderCurrentHashCode(hash, length)} + "`,
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chunk: {
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id: "\" + chunkId + \"",
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hash: `" + ${JSON.stringify(chunkMaps.hash)}[chunkId] + "`,
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hashWithLength: (length) => {
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const shortChunkHashMap = {};
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Object.keys(chunkMaps.hash).forEach((chunkId) => {
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if(typeof chunkMaps.hash[chunkId] === "string")
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shortChunkHashMap[chunkId] = chunkMaps.hash[chunkId].substr(0, length);
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});
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return `" + ${JSON.stringify(shortChunkHashMap)}[chunkId] + "`;
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},
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name: `" + (${JSON.stringify(chunkMaps.name)}[chunkId]||chunkId) + "`
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}
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}) + ";",
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"require('fs').readFile(filename, 'utf-8', function(err, content) {",
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this.indent([
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"if(err) return reject(err);",
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"var chunk = {};",
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"require('vm').runInThisContext('(function(exports, require, __dirname, __filename) {' + content + '\\n})', filename)" +
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"(chunk, require, require('path').dirname(filename), filename);"
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].concat(insertMoreModules).concat([
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"var callbacks = [];",
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"for(var i = 0; i < chunkIds.length; i++) {",
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this.indent([
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"if(installedChunks[chunkIds[i]])",
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this.indent([
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"callbacks = callbacks.concat(installedChunks[chunkIds[i]][0]);"
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]),
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"installedChunks[chunkIds[i]] = 0;"
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]),
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"}",
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"for(i = 0; i < callbacks.length; i++)",
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this.indent("callbacks[i]();")
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])),
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"});"
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]),
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"});",
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"return installedChunks[chunkId][2] = promise;"
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]);
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} else {
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const request = this.applyPluginsWaterfall("asset-path", JSON.stringify(`./${chunkFilename}`), {
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hash: `" + ${this.renderCurrentHashCode(hash)} + "`,
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hashWithLength: (length) => `" + ${this.renderCurrentHashCode(hash, length)} + "`,
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chunk: {
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id: "\" + chunkId + \"",
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hash: `" + ${JSON.stringify(chunkMaps.hash)}[chunkId] + "`,
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hashWithLength: (length) => {
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const shortChunkHashMap = {};
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Object.keys(chunkMaps.hash).forEach((chunkId) => {
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if(typeof chunkMaps.hash[chunkId] === "string")
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shortChunkHashMap[chunkId] = chunkMaps.hash[chunkId].substr(0, length);
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});
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return `" + ${JSON.stringify(shortChunkHashMap)}[chunkId] + "`;
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},
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name: `" + (${JSON.stringify(chunkMaps.name)}[chunkId]||chunkId) + "`
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}
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});
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return this.asString([
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"// \"0\" is the signal for \"already loaded\"",
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"if(installedChunks[chunkId] !== 0) {",
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this.indent([
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`var chunk = require(${request});`
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].concat(insertMoreModules).concat([
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"for(var i = 0; i < chunkIds.length; i++)",
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this.indent("installedChunks[chunkIds[i]] = 0;")
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])),
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"}",
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"return Promise.resolve();"
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]);
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}
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});
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mainTemplate.plugin("hot-bootstrap", function(source, chunk, hash) {
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const hotUpdateChunkFilename = this.outputOptions.hotUpdateChunkFilename;
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const hotUpdateMainFilename = this.outputOptions.hotUpdateMainFilename;
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const chunkMaps = chunk.getChunkMaps();
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const currentHotUpdateChunkFilename = this.applyPluginsWaterfall("asset-path", JSON.stringify(hotUpdateChunkFilename), {
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hash: `" + ${this.renderCurrentHashCode(hash)} + "`,
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hashWithLength: (length) => `" + ${this.renderCurrentHashCode(hash, length)} + "`,
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chunk: {
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id: "\" + chunkId + \"",
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hash: `" + ${JSON.stringify(chunkMaps.hash)}[chunkId] + "`,
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hashWithLength: (length) => {
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const shortChunkHashMap = {};
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Object.keys(chunkMaps.hash).forEach((chunkId) => {
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if(typeof chunkMaps.hash[chunkId] === "string")
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shortChunkHashMap[chunkId] = chunkMaps.hash[chunkId].substr(0, length);
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});
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return `" + ${JSON.stringify(shortChunkHashMap)}[chunkId] + "`;
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},
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name: `" + (${JSON.stringify(chunkMaps.name)}[chunkId]||chunkId) + "`
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}
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});
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const currentHotUpdateMainFilename = this.applyPluginsWaterfall("asset-path", JSON.stringify(hotUpdateMainFilename), {
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hash: `" + ${this.renderCurrentHashCode(hash)} + "`,
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hashWithLength: (length) => `" + ${this.renderCurrentHashCode(hash, length)} + "`
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});
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return Template.getFunctionContent(asyncChunkLoading ? require("./NodeMainTemplateAsync.runtime.js") : require("./NodeMainTemplate.runtime.js"))
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.replace(/\$require\$/g, this.requireFn)
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.replace(/\$hotMainFilename\$/g, currentHotUpdateMainFilename)
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.replace(/\$hotChunkFilename\$/g, currentHotUpdateChunkFilename);
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});
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mainTemplate.plugin("hash", function(hash) {
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hash.update("node");
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hash.update("3");
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hash.update(this.outputOptions.filename + "");
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hash.update(this.outputOptions.chunkFilename + "");
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});
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}
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};
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