mirror of https://github.com/webpack/webpack.git
112 lines
2.9 KiB
JavaScript
112 lines
2.9 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const ExternalModule = require("./ExternalModule");
|
|
|
|
class ExternalModuleFactoryPlugin {
|
|
constructor(type, externals) {
|
|
this.type = type;
|
|
this.externals = externals;
|
|
}
|
|
|
|
apply(normalModuleFactory) {
|
|
const globalType = this.type;
|
|
normalModuleFactory.hooks.factory.tap(
|
|
"ExternalModuleFactoryPlugin",
|
|
factory => (data, callback) => {
|
|
const context = data.context;
|
|
const dependency = data.dependencies[0];
|
|
|
|
const handleExternal = (value, type, callback) => {
|
|
if (typeof type === "function") {
|
|
callback = type;
|
|
type = undefined;
|
|
}
|
|
if (value === false) return factory(data, callback);
|
|
if (value === true) value = dependency.request;
|
|
if (type === undefined && /^[a-z0-9]+ /.test(value)) {
|
|
const idx = value.indexOf(" ");
|
|
type = value.substr(0, idx);
|
|
value = value.substr(idx + 1);
|
|
}
|
|
callback(
|
|
null,
|
|
new ExternalModule(value, type || globalType, dependency.request)
|
|
);
|
|
return true;
|
|
};
|
|
|
|
const handleExternals = (externals, callback) => {
|
|
if (typeof externals === "string") {
|
|
if (externals === dependency.request) {
|
|
return handleExternal(dependency.request, callback);
|
|
}
|
|
} else if (Array.isArray(externals)) {
|
|
let i = 0;
|
|
const next = () => {
|
|
let asyncFlag;
|
|
const handleExternalsAndCallback = (err, module) => {
|
|
if (err) return callback(err);
|
|
if (!module) {
|
|
if (asyncFlag) {
|
|
asyncFlag = false;
|
|
return;
|
|
}
|
|
return next();
|
|
}
|
|
callback(null, module);
|
|
};
|
|
|
|
do {
|
|
asyncFlag = true;
|
|
if (i >= externals.length) return callback();
|
|
handleExternals(externals[i++], handleExternalsAndCallback);
|
|
} while (!asyncFlag);
|
|
asyncFlag = false;
|
|
};
|
|
|
|
next();
|
|
return;
|
|
} else if (externals instanceof RegExp) {
|
|
if (externals.test(dependency.request)) {
|
|
return handleExternal(dependency.request, callback);
|
|
}
|
|
} else if (typeof externals === "function") {
|
|
externals.call(
|
|
null,
|
|
context,
|
|
dependency.request,
|
|
(err, value, type) => {
|
|
if (err) return callback(err);
|
|
if (value !== undefined) {
|
|
handleExternal(value, type, callback);
|
|
} else {
|
|
callback();
|
|
}
|
|
}
|
|
);
|
|
return;
|
|
} else if (
|
|
typeof externals === "object" &&
|
|
Object.prototype.hasOwnProperty.call(externals, dependency.request)
|
|
) {
|
|
return handleExternal(externals[dependency.request], callback);
|
|
}
|
|
callback();
|
|
};
|
|
|
|
handleExternals(this.externals, (err, module) => {
|
|
if (err) return callback(err);
|
|
if (!module) return handleExternal(false, callback);
|
|
return callback(null, module);
|
|
});
|
|
}
|
|
);
|
|
}
|
|
}
|
|
module.exports = ExternalModuleFactoryPlugin;
|