NodeSourcePlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
var path = require("path");
var AliasPlugin = require("enhanced-resolve/lib/AliasPlugin");
var ParserHelpers = require("../ParserHelpers");
var nodeLibsBrowser = require("node-libs-browser");
function NodeSourcePlugin(options) {
this.options = options;
}
module.exports = NodeSourcePlugin;
NodeSourcePlugin.prototype.apply = function(compiler) {
var options = this.options;
function getPathToModule(module, type) {
if(type === true || (type === undefined && nodeLibsBrowser[module])) {
if(!nodeLibsBrowser[module]) throw new Error("No browser version for node.js core module '" + module + "' available");
return nodeLibsBrowser[module];
} else if(type === "mock") {
return require.resolve("node-libs-browser/mock/" + module);
} else if(type === "empty") {
return require.resolve("node-libs-browser/mock/empty");
} else return module;
}
function buildExpression(context, pathToModule) {
var moduleJsPath = path.relative(context, pathToModule);
if(!/^[A-Z]:/i.test(moduleJsPath)) {
moduleJsPath = "./" + moduleJsPath.replace(/\\/g, "/");
}
return "require(" + JSON.stringify(moduleJsPath) + ")";
}
function addExpression(parser, name, module, type, suffix) {
suffix = suffix || "";
parser.plugin("expression " + name, function() {
if(this.state.module && this.state.module.resource === getPathToModule(module, type)) return;
return ParserHelpers.addParsedVariableToModule(this, name, buildExpression(this.state.module.context, getPathToModule(module, type)) + suffix);
});
}
compiler.plugin("compilation", function(compilation, params) {
params.normalModuleFactory.plugin("parser", function(parser, parserOptions) {
if(parserOptions.node === false)
return;
var localOptions = options;
if(parserOptions.node)
localOptions = Object.assign({}, localOptions, parserOptions.node);
if(localOptions.global) {
parser.plugin("expression global", function() {
return ParserHelpers.addParsedVariableToModule(this, "global", buildExpression(this.state.module.context, require.resolve("../../buildin/global.js")));
});
}
if(localOptions.process) {
var processType = localOptions.process;
addExpression(parser, "process", "process", processType);
}
if(localOptions.console) {
var consoleType = localOptions.console;
addExpression(parser, "console", "console", consoleType);
}
var bufferType = localOptions.Buffer;
if(bufferType) {
addExpression(parser, "Buffer", "buffer", bufferType, ".Buffer");
}
if(localOptions.setImmediate) {
var setImmediateType = localOptions.setImmediate;
addExpression(parser, "setImmediate", "timers", setImmediateType, ".setImmediate");
addExpression(parser, "clearImmediate", "timers", setImmediateType, ".clearImmediate");
}
});
});
compiler.plugin("after-resolvers", function(compiler) {
Object.keys(nodeLibsBrowser).forEach(function(lib) {
if(options[lib] !== false) {
compiler.resolvers.normal.apply(
new AliasPlugin("described-resolve", {
name: lib,
onlyModule: true,
alias: getPathToModule(lib, options[lib])
}, "resolve")
);
}
});
});
};