mirror of https://github.com/webpack/webpack.git
132 lines
3.9 KiB
JavaScript
132 lines
3.9 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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var async = require("async");
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var path = require("path");
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var Tapable = require("tapable");
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var ContextModule = require("./ContextModule");
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var ContextElementDependency = require("./dependencies/ContextElementDependency");
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function ContextModuleFactory(resolvers) {
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Tapable.call(this);
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this.resolvers = resolvers;
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}
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module.exports = ContextModuleFactory;
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ContextModuleFactory.prototype = Object.create(Tapable.prototype);
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ContextModuleFactory.prototype.constructor = ContextModuleFactory;
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ContextModuleFactory.prototype.create = function(context, dependency, callback) {
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this.applyPluginsAsyncWaterfall("before-resolve", {
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context: context,
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request: dependency.request,
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recursive: dependency.recursive,
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regExp: dependency.regExp
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}, function(err, result) {
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if(err) return callback(err);
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// Ignored
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if(!result) return callback();
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var context = result.context;
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var request = result.request;
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var recursive = result.recursive;
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var regExp = result.regExp;
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var loaders, resource, loadersPrefix = "";
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var idx = request.lastIndexOf("!");
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if(idx >= 0) {
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loaders = request.substr(0, idx + 1);
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for(var i = 0; i < loaders.length && loaders[i] === "!"; i++) {
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loadersPrefix += "!";
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}
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loaders = loaders.substr(i).replace(/!+$/, "").replace(/!!+/g, "!");
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if(loaders === "") loaders = [];
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else loaders = loaders.split("!");
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resource = request.substr(idx + 1);
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} else {
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loaders = [];
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resource = request;
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}
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async.parallel([
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this.resolvers.context.resolve.bind(this.resolvers.context, context, resource),
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async.map.bind(async, loaders, this.resolvers.loader.resolve.bind(this.resolvers.loader, context))
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], function(err, result) {
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if(err) return callback(err);
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this.applyPluginsAsyncWaterfall("after-resolve", {
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loaders: loadersPrefix + result[1].join("!") + (result[1].length > 0 ? "!" : ""),
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resource: result[0],
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recursive: recursive,
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regExp: regExp
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}, function(err, result) {
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if(err) return callback(err);
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// Ignored
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if(!result) return callback();
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return callback(null, new ContextModule(this.resolveDependencies.bind(this), result.resource, result.recursive, result.regExp, result.loaders));
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}.bind(this));
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}.bind(this));
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}.bind(this));
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};
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ContextModuleFactory.prototype.resolveDependencies = function resolveDependencies(fs, resource, recursive, regExp, callback) {
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(function addDirectory(directory, callback) {
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fs.readdir(directory, function(err, files) {
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if(err) return callback(err);
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if(!files || files.length === 0) return callback(null, []);
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async.map(files.filter(function(p) {
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return p.indexOf(".") !== 0;
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}), function(seqment, callback) {
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var subResource = path.join(directory, seqment);
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fs.stat(subResource, function(err, stat) {
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if(err) return callback(err);
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if(stat.isDirectory()) {
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if(!recursive) return callback();
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addDirectory.call(this, subResource, callback);
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} else if(stat.isFile()) {
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var obj = {
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context: resource,
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request: "." + subResource.substr(resource.length).replace(/\\/g, "/")
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};
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this.applyPluginsAsyncWaterfall("alternatives", [obj], function(err, alternatives) {
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if(err) return callback(err);
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alternatives = alternatives.filter(function(obj) {
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return regExp.test(obj.request);
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}).map(function(obj) {
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var dep = new ContextElementDependency(obj.request);
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dep.optional = true;
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return dep;
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});
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callback(null, alternatives);
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});
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} else callback();
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}.bind(this));
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}.bind(this), function(err, result) {
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if(err) return callback(err);
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if(!result) return callback(null, []);
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callback(null, result.filter(function(i) {
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return !!i;
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}).reduce(function(a, i) {
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return a.concat(i);
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}, []));
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});
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}.bind(this));
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}.call(this, resource, callback));
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};
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