142 lines
4.5 KiB
JavaScript
142 lines
4.5 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const RuntimeGlobals = require("../RuntimeGlobals");
|
|
const RuntimeModule = require("../RuntimeModule");
|
|
const Template = require("../Template");
|
|
const {
|
|
compareModulesByIdentifier,
|
|
compareStrings
|
|
} = require("../util/comparators");
|
|
|
|
class ShareRuntimeModule extends RuntimeModule {
|
|
constructor() {
|
|
super("sharing");
|
|
}
|
|
|
|
/**
|
|
* @returns {string} runtime code
|
|
*/
|
|
generate() {
|
|
const {
|
|
runtimeTemplate,
|
|
chunkGraph,
|
|
codeGenerationResults,
|
|
outputOptions: { uniqueName }
|
|
} = this.compilation;
|
|
/** @type {Map<string, Map<number, Set<string>>>} */
|
|
const initCodePerScope = new Map();
|
|
for (const chunk of this.chunk.getAllReferencedChunks()) {
|
|
const modules = chunkGraph.getOrderedChunkModulesIterableBySourceType(
|
|
chunk,
|
|
"share-init",
|
|
compareModulesByIdentifier
|
|
);
|
|
if (!modules) continue;
|
|
for (const m of modules) {
|
|
const data = codeGenerationResults.getData(
|
|
m,
|
|
chunk.runtime,
|
|
"share-init"
|
|
);
|
|
if (!data) continue;
|
|
for (const item of data) {
|
|
const { shareScope, initStage, init } = item;
|
|
let stages = initCodePerScope.get(shareScope);
|
|
if (stages === undefined) {
|
|
initCodePerScope.set(shareScope, (stages = new Map()));
|
|
}
|
|
let list = stages.get(initStage || 0);
|
|
if (list === undefined) {
|
|
stages.set(initStage || 0, (list = new Set()));
|
|
}
|
|
list.add(init);
|
|
}
|
|
}
|
|
}
|
|
return Template.asString([
|
|
`${RuntimeGlobals.shareScopeMap} = {};`,
|
|
"var initPromises = {};",
|
|
"var initTokens = {};",
|
|
`${RuntimeGlobals.initializeSharing} = ${runtimeTemplate.basicFunction(
|
|
"name, initScope",
|
|
[
|
|
"if(!initScope) initScope = [];",
|
|
"// handling circular init calls",
|
|
"var initToken = initTokens[name];",
|
|
"if(!initToken) initToken = initTokens[name] = {};",
|
|
"if(initScope.indexOf(initToken) >= 0) return;",
|
|
"initScope.push(initToken);",
|
|
"// only runs once",
|
|
"if(initPromises[name]) return initPromises[name];",
|
|
"// creates a new share scope if needed",
|
|
`if(!${RuntimeGlobals.hasOwnProperty}(${RuntimeGlobals.shareScopeMap}, name)) ${RuntimeGlobals.shareScopeMap}[name] = {};`,
|
|
"// runs all init snippets from all modules reachable",
|
|
`var scope = ${RuntimeGlobals.shareScopeMap}[name];`,
|
|
`var warn = ${runtimeTemplate.returningFunction(
|
|
'typeof console !== "undefined" && console.warn && console.warn(msg)',
|
|
"msg"
|
|
)};`,
|
|
`var uniqueName = ${JSON.stringify(uniqueName || undefined)};`,
|
|
`var register = ${runtimeTemplate.basicFunction(
|
|
"name, version, factory, eager",
|
|
[
|
|
"var versions = scope[name] = scope[name] || {};",
|
|
"var activeVersion = versions[version];",
|
|
"if(!activeVersion || (!activeVersion.loaded && (!eager != !activeVersion.eager ? eager : uniqueName > activeVersion.from))) versions[version] = { get: factory, from: uniqueName, eager: !!eager };"
|
|
]
|
|
)};`,
|
|
`var initExternal = ${runtimeTemplate.basicFunction("id", [
|
|
`var handleError = ${runtimeTemplate.expressionFunction(
|
|
'warn("Initialization of sharing external failed: " + err)',
|
|
"err"
|
|
)};`,
|
|
"try {",
|
|
Template.indent([
|
|
"var module = __webpack_require__(id);",
|
|
"if(!module) return;",
|
|
`var initFn = ${runtimeTemplate.returningFunction(
|
|
`module && module.init && module.init(${RuntimeGlobals.shareScopeMap}[name], initScope)`,
|
|
"module"
|
|
)}`,
|
|
"if(module.then) return promises.push(module.then(initFn, handleError));",
|
|
"var initResult = initFn(module);",
|
|
"if(initResult && initResult.then) return promises.push(initResult.catch(handleError));"
|
|
]),
|
|
"} catch(err) { handleError(err); }"
|
|
])}`,
|
|
"var promises = [];",
|
|
"switch(name) {",
|
|
...Array.from(initCodePerScope)
|
|
.sort(([a], [b]) => compareStrings(a, b))
|
|
.map(([name, stages]) =>
|
|
Template.indent([
|
|
`case ${JSON.stringify(name)}: {`,
|
|
Template.indent(
|
|
Array.from(stages)
|
|
.sort(([a], [b]) => a - b)
|
|
.map(([, initCode]) =>
|
|
Template.asString(Array.from(initCode))
|
|
)
|
|
),
|
|
"}",
|
|
"break;"
|
|
])
|
|
),
|
|
"}",
|
|
"if(!promises.length) return initPromises[name] = 1;",
|
|
`return initPromises[name] = Promise.all(promises).then(${runtimeTemplate.returningFunction(
|
|
"initPromises[name] = 1"
|
|
)});`
|
|
]
|
|
)};`
|
|
]);
|
|
}
|
|
}
|
|
|
|
module.exports = ShareRuntimeModule;
|