mirror of https://github.com/webpack/webpack.git
130 lines
3.8 KiB
JavaScript
130 lines
3.8 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 Module = require("./Module");
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var OriginalSource = require("webpack-core/lib/OriginalSource");
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var RawSource = require("webpack-core/lib/RawSource");
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function ContextModule(resolveDependencies, context, recursive, regExp, addon) {
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Module.call(this);
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this.resolveDependencies = resolveDependencies;
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this.context = context;
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this.recursive = recursive;
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this.regExp = regExp;
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this.addon = addon;
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this.cacheable = true;
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this.contextDependencies = [context];
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this.built = false;
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}
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module.exports = ContextModule;
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ContextModule.prototype = Object.create(Module.prototype);
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ContextModule.prototype.identifier = function() {
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var identifier = "";
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identifier += this.context + " ";
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if(!this.recursive)
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identifier += "nonrecursive ";
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if(this.addon)
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identifier += this.addon;
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if(this.regExp)
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identifier += this.regExp;
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return identifier.replace(/ $/, "");
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};
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function prettyRegExp(str) {
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return str.substring(1, str.length - 1);
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}
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ContextModule.prototype.readableIdentifier = function(requestShortener) {
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var identifier = "";
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identifier += requestShortener.shorten(this.context) + " ";
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if(!this.recursive)
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identifier += "nonrecursive ";
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if(this.addon)
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identifier += requestShortener.shorten(this.addon);
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if(this.regExp)
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identifier += prettyRegExp(this.regExp + "");
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return identifier.replace(/ $/, "");
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};
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ContextModule.prototype.needRebuild = function(fileTimestamps, contextTimestamps) {
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var ts = contextTimestamps[this.context];
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if(!ts) return true;
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return ts >= this.builtTime;
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};
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ContextModule.prototype.disconnect = function disconnect() {
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this.built = false;
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Module.prototype.disconnect.call(this);
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};
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ContextModule.prototype.build = function(options, compilation, resolver, fs, callback) {
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this.built = true;
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this.builtTime = new Date().getTime();
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var addon = this.addon;
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this.resolveDependencies(fs, this.context, this.recursive, this.regExp, function(err, dependencies) {
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if(err) return callback(err);
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if(dependencies) {
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dependencies.forEach(function(dep) {
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dep.loc = dep.userRequest;
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dep.userRequest = dep.request;
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dep.request = addon + dep.userRequest;
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});
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}
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this.dependencies = dependencies;
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callback();
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}.bind(this));
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};
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ContextModule.prototype.source = function() {
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var str;
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if(this.dependencies && this.dependencies.length > 0) {
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var map = {};
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this.dependencies.slice().sort(function(a, b) {
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if(a.userRequest === b.userRequest) return 0;
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return a.userRequest < b.userRequest ? -1 : 1;
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}).forEach(function(dep) {
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if(dep.module)
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map[dep.userRequest] = dep.module.id;
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});
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str = [
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"var map = ", JSON.stringify(map, null, "\t"), ";\n",
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"function webpackContext(req) {\n",
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"\treturn __webpack_require__(webpackContextResolve(req));\n",
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"};\n",
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"function webpackContextResolve(req) {\n",
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"\treturn map[req] || (function() { throw new Error(\"Cannot find module '\" + req + \"'.\") }());\n",
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"};\n",
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"webpackContext.keys = function webpackContextKeys() {\n",
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"\treturn Object.keys(map);\n",
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"};\n",
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"webpackContext.resolve = webpackContextResolve;\n",
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"module.exports = webpackContext;\n",
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"webpackContext.id = " + this.id + ";\n"
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];
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} else {
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str = [
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"function webpackContext(req) {\n",
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"\tthrow new Error(\"Cannot find module '\" + req + \"'.\");\n",
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"}\n",
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"webpackContext.keys = function() { return []; };\n",
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"webpackContext.resolve = webpackContext;\n",
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"module.exports = webpackContext;\n",
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"webpackContext.id = " + this.id + ";\n"
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];
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}
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if(this.useSourceMap) {
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return new OriginalSource(str.join(""), this.identifier());
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} else {
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return new RawSource(str.join(""));
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}
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};
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ContextModule.prototype.size = function() {
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return this.dependencies.map(function(dep) {
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return dep.userRequest.length + 5;
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}).reduce(function(a, b) { return a + b; }, 160);
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};
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