NodeStuffPlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const path = require("path");
const ParserHelpers = require("./ParserHelpers");
const ConstDependency = require("./dependencies/ConstDependency");
const NullFactory = require("./NullFactory");
class NodeStuffPlugin {
constructor(options) {
this.options = options;
}
apply(compiler) {
const options = this.options;
compiler.plugin("compilation", (compilation, params) => {
compilation.dependencyFactories.set(ConstDependency, new NullFactory());
compilation.dependencyTemplates.set(ConstDependency, new ConstDependency.Template());
params.normalModuleFactory.plugin("parser", (parser, parserOptions) => {
if(parserOptions.node === false)
return;
let localOptions = options;
if(parserOptions.node)
localOptions = Object.assign({}, localOptions, parserOptions.node);
function setConstant(expressionName, value) {
parser.plugin(`expression ${expressionName}`, function() {
this.state.current.addVariable(expressionName, JSON.stringify(value));
return true;
});
}
function setModuleConstant(expressionName, fn) {
parser.plugin(`expression ${expressionName}`, function() {
this.state.current.addVariable(expressionName, JSON.stringify(fn(this.state.module)));
return true;
});
}
const context = compiler.context;
if(localOptions.__filename === "mock") {
setConstant("__filename", "/index.js");
} else if(localOptions.__filename) {
setModuleConstant("__filename", module => path.relative(context, module.resource));
}
parser.plugin("evaluate Identifier __filename", function(expr) {
if(!this.state.module) return;
const resource = this.state.module.resource;
const i = resource.indexOf("?");
return ParserHelpers.evaluateToString(i < 0 ? resource : resource.substr(0, i))(expr);
});
if(localOptions.__dirname === "mock") {
setConstant("__dirname", "/");
} else if(localOptions.__dirname) {
setModuleConstant("__dirname", module => path.relative(context, module.context));
}
parser.plugin("evaluate Identifier __dirname", function(expr) {
if(!this.state.module) return;
return ParserHelpers.evaluateToString(this.state.module.context)(expr);
});
parser.plugin("expression require.main", ParserHelpers.toConstantDependency("__webpack_require__.c[__webpack_require__.s]"));
parser.plugin(
"expression require.extensions",
ParserHelpers.expressionIsUnsupported("require.extensions is not supported by webpack. Use a loader instead.")
);
parser.plugin("expression module.loaded", ParserHelpers.toConstantDependency("module.l"));
parser.plugin("expression module.id", ParserHelpers.toConstantDependency("module.i"));
parser.plugin("expression module.exports", function() {
const module = this.state.module;
const isHarmony = module.meta && module.meta.harmonyModule;
if(!isHarmony)
return true;
});
parser.plugin("evaluate Identifier module.hot", ParserHelpers.evaluateToIdentifier("module.hot", false));
parser.plugin("expression module", function() {
const module = this.state.module;
const isHarmony = module.meta && module.meta.harmonyModule;
let moduleJsPath = path.join(__dirname, "..", "buildin", isHarmony ? "harmony-module.js" : "module.js");
if(module.context) {
moduleJsPath = path.relative(this.state.module.context, moduleJsPath);
if(!/^[A-Z]:/i.test(moduleJsPath)) {
moduleJsPath = `./${moduleJsPath.replace(/\\/g, "/")}`;
}
}
return ParserHelpers.addParsedVariableToModule(this, "module", `require(${JSON.stringify(moduleJsPath)})(module)`);
});
});
});
}
}
module.exports = NodeStuffPlugin;