92 lines
2.8 KiB
JavaScript
92 lines
2.8 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.plugin("factory", factory => (data, callback) => {
|
||
|
|
const context = data.context;
|
||
|
|
const dependency = data.dependencies[0];
|
||
|
|
|
||
|
|
function 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(typeof 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));
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
(function handleExternals(externals, callback) {
|
||
|
|
if(typeof externals === "string") {
|
||
|
|
if(externals === dependency.request) {
|
||
|
|
return handleExternal(dependency.request, callback);
|
||
|
|
}
|
||
|
|
} else if(Array.isArray(externals)) {
|
||
|
|
let i = 0;
|
||
|
|
(function next() {
|
||
|
|
let asyncFlag;
|
||
|
|
const handleExternalsAndCallback = function 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); // eslint-disable-line keyword-spacing
|
||
|
|
asyncFlag = false;
|
||
|
|
}());
|
||
|
|
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, function(err, value, type) {
|
||
|
|
if(err) return callback(err);
|
||
|
|
if(typeof 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();
|
||
|
|
}(this.externals, function(err, module) {
|
||
|
|
if(err) return callback(err);
|
||
|
|
if(!module) return handleExternal(false, callback);
|
||
|
|
return callback(null, module);
|
||
|
|
}));
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
module.exports = ExternalModuleFactoryPlugin;
|