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/*
MIT License http://www.opensource.org/licenses/mit-license.php
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");
const {
chunkHasJs,
getChunkFilenameTemplate
} = require("../javascript/JavascriptModulesPlugin");
const { getInitialChunkIds } = require("../javascript/StartupHelpers");
const compileBooleanMatcher = require("../util/compileBooleanMatcher");
const { getUndoPath } = require("../util/identifier");
class RequireChunkLoadingRuntimeModule extends RuntimeModule {
constructor(runtimeRequirements) {
super("require chunk loading", RuntimeModule.STAGE_ATTACH);
this.runtimeRequirements = runtimeRequirements;
}
/**
* @returns {string} runtime code
*/
generate() {
const { chunkGraph, chunk } = this;
const { runtimeTemplate } = this.compilation;
const fn = RuntimeGlobals.ensureChunkHandlers;
const withBaseURI = this.runtimeRequirements.has(RuntimeGlobals.baseURI);
const withExternalInstallChunk = this.runtimeRequirements.has(
RuntimeGlobals.externalInstallChunk
);
const withOnChunkLoad = this.runtimeRequirements.has(
RuntimeGlobals.onChunksLoaded
);
const withLoading = this.runtimeRequirements.has(
RuntimeGlobals.ensureChunkHandlers
);
const withHmr = this.runtimeRequirements.has(
RuntimeGlobals.hmrDownloadUpdateHandlers
);
const withHmrManifest = this.runtimeRequirements.has(
RuntimeGlobals.hmrDownloadManifest
);
const conditionMap = chunkGraph.getChunkConditionMap(chunk, chunkHasJs);
const hasJsMatcher = compileBooleanMatcher(conditionMap);
const initialChunkIds = getInitialChunkIds(chunk, chunkGraph);
const outputName = this.compilation.getPath(
getChunkFilenameTemplate(chunk, this.compilation.outputOptions),
{
chunk,
contentHashType: "javascript"
}
);
const rootOutputDir = getUndoPath(
outputName,
this.compilation.outputOptions.path,
true
);
const stateExpression = withHmr
? `${RuntimeGlobals.hmrRuntimeStatePrefix}_require`
: undefined;
return Template.asString([
withBaseURI
? Template.asString([
`${RuntimeGlobals.baseURI} = require("url").pathToFileURL(${
rootOutputDir !== "./"
? `__dirname + ${JSON.stringify("/" + rootOutputDir)}`
: "__filename"
});`
])
: "// no baseURI",
"",
"// object to store loaded chunks",
'// "1" means "loaded", otherwise not loaded yet',
`var installedChunks = ${
stateExpression ? `${stateExpression} = ${stateExpression} || ` : ""
}{`,
Template.indent(
Array.from(initialChunkIds, id => `${JSON.stringify(id)}: 1`).join(
",\n"
)
),
"};",
"",
withOnChunkLoad
? `${
RuntimeGlobals.onChunksLoaded
}.require = ${runtimeTemplate.returningFunction(
"installedChunks[chunkId]",
"chunkId"
)};`
: "// no on chunks loaded",
"",
withLoading || withExternalInstallChunk
? `var installChunk = ${runtimeTemplate.basicFunction("chunk", [
"var moreModules = chunk.modules, chunkIds = chunk.ids, runtime = chunk.runtime;",
"for(var moduleId in moreModules) {",
Template.indent([
`if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
Template.indent([
`${RuntimeGlobals.moduleFactories}[moduleId] = moreModules[moduleId];`
]),
"}"
]),
"}",
`if(runtime) runtime(__webpack_require__);`,
"for(var i = 0; i < chunkIds.length; i++)",
Template.indent("installedChunks[chunkIds[i]] = 1;"),
withOnChunkLoad ? `${RuntimeGlobals.onChunksLoaded}();` : ""
])};`
: "// no chunk install function needed",
"",
withLoading
? Template.asString([
"// require() chunk loading for javascript",
`${fn}.require = ${runtimeTemplate.basicFunction(
"chunkId, promises",
hasJsMatcher !== false
? [
'// "1" is the signal for "already loaded"',
"if(!installedChunks[chunkId]) {",
Template.indent([
hasJsMatcher === true
? "if(true) { // all chunks have JS"
: `if(${hasJsMatcher("chunkId")}) {`,
Template.indent([
`installChunk(require(${JSON.stringify(
rootOutputDir
)} + ${
RuntimeGlobals.getChunkScriptFilename
}(chunkId)));`
]),
"} else installedChunks[chunkId] = 1;",
""
]),
"}"
]
: "installedChunks[chunkId] = 1;"
)};`
])
: "// no chunk loading",
"",
withExternalInstallChunk
? Template.asString([
"module.exports = __webpack_require__;",
`${RuntimeGlobals.externalInstallChunk} = installChunk;`
])
: "// no external install chunk",
"",
withHmr
? Template.asString([
"function loadUpdateChunk(chunkId, updatedModulesList) {",
Template.indent([
`var update = require(${JSON.stringify(rootOutputDir)} + ${
RuntimeGlobals.getChunkUpdateScriptFilename
}(chunkId));`,
"var updatedModules = update.modules;",
"var runtime = update.runtime;",
"for(var moduleId in updatedModules) {",
Template.indent([
`if(${RuntimeGlobals.hasOwnProperty}(updatedModules, moduleId)) {`,
Template.indent([
`currentUpdate[moduleId] = updatedModules[moduleId];`,
"if(updatedModulesList) updatedModulesList.push(moduleId);"
]),
"}"
]),
"}",
"if(runtime) currentUpdateRuntime.push(runtime);"
]),
"}",
"",
Template.getFunctionContent(
require("../hmr/JavascriptHotModuleReplacement.runtime.js")
)
.replace(/\$key\$/g, "require")
.replace(/\$installedChunks\$/g, "installedChunks")
.replace(/\$loadUpdateChunk\$/g, "loadUpdateChunk")
.replace(/\$moduleCache\$/g, RuntimeGlobals.moduleCache)
.replace(/\$moduleFactories\$/g, RuntimeGlobals.moduleFactories)
.replace(
/\$ensureChunkHandlers\$/g,
RuntimeGlobals.ensureChunkHandlers
)
.replace(/\$hasOwnProperty\$/g, RuntimeGlobals.hasOwnProperty)
.replace(/\$hmrModuleData\$/g, RuntimeGlobals.hmrModuleData)
.replace(
/\$hmrDownloadUpdateHandlers\$/g,
RuntimeGlobals.hmrDownloadUpdateHandlers
)
.replace(
/\$hmrInvalidateModuleHandlers\$/g,
RuntimeGlobals.hmrInvalidateModuleHandlers
)
])
: "// no HMR",
"",
withHmrManifest
? Template.asString([
`${RuntimeGlobals.hmrDownloadManifest} = function() {`,
Template.indent([
"return Promise.resolve().then(function() {",
Template.indent([
`return require(${JSON.stringify(rootOutputDir)} + ${
RuntimeGlobals.getUpdateManifestFilename
}());`
]),
'}).catch(function(err) { if(err.code !== "MODULE_NOT_FOUND") throw err; });'
]),
"}"
])
: "// no HMR manifest"
]);
}
}
module.exports = RequireChunkLoadingRuntimeModule;