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DelegatedModuleFactoryPlugin.js
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Mon, Nov 18, 12:14

DelegatedModuleFactoryPlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const DelegatedModule = require("./DelegatedModule");
// options.source
// options.type
// options.context
// options.scope
// options.content
// options.associatedObjectForCache
class DelegatedModuleFactoryPlugin {
constructor(options) {
this.options = options;
options.type = options.type || "require";
options.extensions = options.extensions || ["", ".js", ".json", ".wasm"];
}
apply(normalModuleFactory) {
const scope = this.options.scope;
if (scope) {
normalModuleFactory.hooks.factorize.tapAsync(
"DelegatedModuleFactoryPlugin",
(data, callback) => {
const [dependency] = data.dependencies;
const { request } = dependency;
if (request && request.startsWith(`${scope}/`)) {
const innerRequest = "." + request.substr(scope.length);
let resolved;
if (innerRequest in this.options.content) {
resolved = this.options.content[innerRequest];
return callback(
null,
new DelegatedModule(
this.options.source,
resolved,
this.options.type,
innerRequest,
request
)
);
}
for (let i = 0; i < this.options.extensions.length; i++) {
const extension = this.options.extensions[i];
const requestPlusExt = innerRequest + extension;
if (requestPlusExt in this.options.content) {
resolved = this.options.content[requestPlusExt];
return callback(
null,
new DelegatedModule(
this.options.source,
resolved,
this.options.type,
requestPlusExt,
request + extension
)
);
}
}
}
return callback();
}
);
} else {
normalModuleFactory.hooks.module.tap(
"DelegatedModuleFactoryPlugin",
module => {
const request = module.libIdent(this.options);
if (request) {
if (request in this.options.content) {
const resolved = this.options.content[request];
return new DelegatedModule(
this.options.source,
resolved,
this.options.type,
request,
module
);
}
}
return module;
}
);
}
}
}
module.exports = DelegatedModuleFactoryPlugin;

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