webpack/lib/ContextModule.js at master · codeinvain/webpack · GitHub

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MIT License http://www.opensource.org/licenses/mit-license.php

Author Tobias Koppers @sokra

var path = require("path");

var Module = require("./Module");

var OriginalSource = require("webpack-sources").OriginalSource;

var RawSource = require("webpack-sources").RawSource;

var AsyncDependenciesBlock = require("./AsyncDependenciesBlock");

function ContextModule(resolveDependencies, context, recursive, regExp, addon, async) {

Module.call(this);

this.resolveDependencies = resolveDependencies;

this.context = context;

this.recursive = recursive;

this.regExp = regExp;

this.addon = addon;

this.async = !!async;

this.cacheable = true;

this.contextDependencies = [context];

this.built = false;

}

module.exports = ContextModule;

ContextModule.prototype = Object.create(Module.prototype);

ContextModule.prototype.constructor = ContextModule;

ContextModule.prototype.identifier = function() {

var identifier = "";

identifier += this.context + " ";

if(this.async)

identifier += "async ";

if(!this.recursive)

identifier += "nonrecursive ";

if(this.addon)

identifier += this.addon;

if(this.regExp)

identifier += this.regExp;

return identifier.replace(/ $/, "");

};

function prettyRegExp(str) {

return str.substring(1, str.length - 1);

}

ContextModule.prototype.readableIdentifier = function(requestShortener) {

var identifier = "";

identifier += requestShortener.shorten(this.context) + " ";

if(this.async)

identifier += "async ";

if(!this.recursive)

identifier += "nonrecursive ";

if(this.addon)

identifier += requestShortener.shorten(this.addon);

if(this.regExp)

identifier += prettyRegExp(this.regExp + "");

return identifier.replace(/ $/, "");

};

function contextify(options, request) {

return request.split("!").map(function(r) {

var rp = path.relative(options.context, r);

if(path.sep === "\\")

rp = rp.replace(/\\/g, "/");

if(rp.indexOf("../") !== 0)

rp = "./" + rp;

return rp;

}).join("!");

}

ContextModule.prototype.libIdent = function(options) {

var identifier = contextify(options, this.context) + " ";

if(this.async)

identifier += "async ";

if(this.recursive)

identifier += "recursive ";

if(this.addon)

identifier += contextify(options, this.addon);

if(this.regExp)

identifier += prettyRegExp(this.regExp + "")

return identifier.replace(/ $/, "");

};

ContextModule.prototype.needRebuild = function(fileTimestamps, contextTimestamps) {

var ts = contextTimestamps[this.context];

if(!ts) return true;

return ts >= this.builtTime;

};

ContextModule.prototype.unbuild = function unbuild() {

this.built = false;

Module.prototype.unbuild.call(this);

};

ContextModule.prototype.build = function(options, compilation, resolver, fs, callback) {

this.built = true;

this.builtTime = new Date().getTime();

var addon = this.addon;

this.resolveDependencies(fs, this.context, this.recursive, this.regExp, function(err, dependencies) {

if(err) return callback(err);

if(dependencies) {

dependencies.forEach(function(dep) {

dep.loc = dep.userRequest;

dep.request = addon + dep.request;

});

}

if(this.async) {

if(dependencies) {

dependencies.forEach(function(dep) {

var block = new AsyncDependenciesBlock(null, dep.module, dep.loc);

block.addDependency(dep);

this.addBlock(block);

}, this);

}

} else {

this.dependencies = dependencies;

}

callback();

}.bind(this));

};

ContextModule.prototype.source = function() {

var str;

var map = {};

if(this.dependencies && this.dependencies.length > 0) {

this.dependencies.slice().sort(function(a, b) {

if(a.userRequest === b.userRequest) return 0;

return a.userRequest < b.userRequest ? -1 : 1;

}).forEach(function(dep) {

if(dep.module)

map[dep.userRequest] = dep.module.id;

});

str = [

"var map = ", JSON.stringify(map, null, "\t"), ";\n",

"function webpackContext(req) {\n",

"\treturn __webpack_require__(webpackContextResolve(req));\n",

"};\n",

"function webpackContextResolve(req) {\n",

"\tvar id = map[req];\n",

"\tif(!(id + 1)) // check for number\n",

"\t\tthrow new Error(\"Cannot find module '\" + req + \"'.\");\n",

"\treturn id;\n",

"};\n",

"webpackContext.keys = function webpackContextKeys() {\n",

"\treturn Object.keys(map);\n",

"};\n",

"webpackContext.resolve = webpackContextResolve;\n",

"module.exports = webpackContext;\n",

"webpackContext.id = " + JSON.stringify(this.id) + ";\n"

];

} else if(this.blocks && this.blocks.length > 0) {

var items = this.blocks.map(function(block) {

return {

dependency: block.dependencies[0],

block: block,

userRequest: block.dependencies[0].userRequest

};

}).filter(function(item) {

return item.dependency.module;

});

var hasMultipleChunks = false;

items.sort(function(a, b) {

if(a.userRequest === b.userRequest) return 0;

return a.userRequest < b.userRequest ? -1 : 1;

}).forEach(function(item) {

if(item.dependency.module) {

var chunks = item.block.chunks || [];

if(chunks.length !== 1)

hasMultipleChunks = true;

map[item.userRequest] = [item.dependency.module.id].concat(chunks.map(function(chunk) {

return chunk.id;

}));

}

});

str = [

"var map = ", JSON.stringify(map, null, "\t"), ";\n",

"function webpackAsyncContext(req) {\n",

"\tvar ids = map[req];",

"\tif(!ids)\n",

"\t\treturn Promise.reject(new Error(\"Cannot find module '\" + req + \"'.\"));\n",

"\treturn ",

hasMultipleChunks ?

"Promise.all(ids.slice(1).map(__webpack_require__.e))" :

"__webpack_require__.e(ids[1])",

".then(function() {\n",

"\t\treturn __webpack_require__(ids[0]);\n",

"\t});\n",

"};\n",

"webpackAsyncContext.keys = function webpackAsyncContextKeys() {\n",

"\treturn Object.keys(map);\n",

"};\n",

"module.exports = webpackAsyncContext;\n",

"webpackAsyncContext.id = " + JSON.stringify(this.id) + ";\n"

];

} else {

str = [

"function webpackEmptyContext(req) {\n",

"\tthrow new Error(\"Cannot find module '\" + req + \"'.\");\n",

"}\n",

"webpackEmptyContext.keys = function() { return []; };\n",

"webpackEmptyContext.resolve = webpackEmptyContext;\n",

"module.exports = webpackEmptyContext;\n",

"webpackEmptyContext.id = " + JSON.stringify(this.id) + ";\n"

];

}

if(this.useSourceMap) {

return new OriginalSource(str.join(""), this.identifier());

} else {

return new RawSource(str.join(""));

}

};

ContextModule.prototype.size = function() {

return this.dependencies.map(function(dep) {

return dep.userRequest.length + 5;

}).reduce(function(a, b) {

return a + b;

}, 160);

};

webpack/lib/ContextModule.js at master · codeinvain/webpack · GitHub

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