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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const RequireContextDependency = require("./RequireContextDependency");
const ContextElementDependency = require("./ContextElementDependency");
const RequireContextDependencyParserPlugin = require("./RequireContextDependencyParserPlugin");
class RequireContextPlugin {
constructor(modulesDirectories, extensions) {
if(!Array.isArray(modulesDirectories))
throw new Error("modulesDirectories must be an array");
if(!Array.isArray(extensions))
throw new Error("extensions must be an array");
this.modulesDirectories = modulesDirectories;
this.extensions = extensions;
}
apply(compiler) {
const modulesDirectories = this.modulesDirectories;
const extensions = this.extensions;
compiler.plugin("compilation", (compilation, params) => {
const contextModuleFactory = params.contextModuleFactory;
const normalModuleFactory = params.normalModuleFactory;
compilation.dependencyFactories.set(RequireContextDependency, contextModuleFactory);
compilation.dependencyTemplates.set(RequireContextDependency, new RequireContextDependency.Template());
compilation.dependencyFactories.set(ContextElementDependency, normalModuleFactory);
params.normalModuleFactory.plugin("parser", (parser, parserOptions) => {
if(typeof parserOptions.requireContext !== "undefined" && !parserOptions.requireContext)
return;
parser.apply(new RequireContextDependencyParserPlugin());
});
params.contextModuleFactory.plugin("alternatives", (items, callback) => {
if(items.length === 0) return callback(null, items);
callback(null, items.map((obj) => {
return extensions.filter((ext) => {
const l = obj.request.length;
return l > ext.length && obj.request.substr(l - ext.length, l) === ext;
}).map((ext) => {
const l = obj.request.length;
return {
context: obj.context,
request: obj.request.substr(0, l - ext.length)
};
}).concat(obj);
}).reduce((a, b) => a.concat(b), []));
});
params.contextModuleFactory.plugin("alternatives", (items, callback) => {
if(items.length === 0) return callback(null, items);
callback(null, items.map((obj) => {
for(let i = 0; i < modulesDirectories.length; i++) {
const dir = modulesDirectories[i];
const idx = obj.request.indexOf("./" + dir + "/");
if(idx === 0) {
obj.request = obj.request.slice(dir.length + 3);
break;
}
}
return obj;
}));
});
});
}
}
module.exports = RequireContextPlugin;
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