MultiCompiler.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const Tapable = require("tapable");
const asyncLib = require("async");
const MultiWatching = require("./MultiWatching");
const MultiStats = require("./MultiStats");
module.exports = class MultiCompiler extends Tapable {
constructor(compilers) {
super();
if(!Array.isArray(compilers)) {
compilers = Object.keys(compilers).map((name) => {
compilers[name].name = name;
return compilers[name];
});
}
this.compilers = compilers;
let doneCompilers = 0;
let compilerStats = [];
this.compilers.forEach((compiler, idx) => {
let compilerDone = false;
compiler.plugin("done", stats => {
if(!compilerDone) {
compilerDone = true;
doneCompilers++;
}
compilerStats[idx] = stats;
if(doneCompilers === this.compilers.length) {
this.applyPlugins("done", new MultiStats(compilerStats));
}
});
compiler.plugin("invalid", () => {
if(compilerDone) {
compilerDone = false;
doneCompilers--;
}
this.applyPlugins("invalid");
});
}, this);
}
get outputPath() {
let commonPath = this.compilers[0].outputPath;
for(const compiler of this.compilers) {
while(compiler.outputPath.indexOf(commonPath) !== 0 && /[/\\]/.test(commonPath)) {
commonPath = commonPath.replace(/[/\\][^/\\]*$/, "");
}
}
if(!commonPath && this.compilers[0].outputPath[0] === "/") return "/";
return commonPath;
}
get inputFileSystem() {
throw new Error("Cannot read inputFileSystem of a MultiCompiler");
}
get outputFileSystem() {
throw new Error("Cannot read outputFileSystem of a MultiCompiler");
}
set inputFileSystem(value) {
this.compilers.forEach(compiler => {
compiler.inputFileSystem = value;
});
}
set outputFileSystem(value) {
this.compilers.forEach(compiler => {
compiler.outputFileSystem = value;
});
}
runWithDependencies(compilers, fn, callback) {
let fulfilledNames = {};
let remainingCompilers = compilers;
const isDependencyFulfilled = (d) => fulfilledNames[d];
const getReadyCompilers = () => {
let readyCompilers = [];
let list = remainingCompilers;
remainingCompilers = [];
for(const c of list) {
const ready = !c.dependencies || c.dependencies.every(isDependencyFulfilled);
if(ready)
readyCompilers.push(c);
else
remainingCompilers.push(c);
}
return readyCompilers;
};
const runCompilers = (callback) => {
if(remainingCompilers.length === 0) return callback();
asyncLib.map(getReadyCompilers(), (compiler, callback) => {
fn(compiler, (err) => {
if(err) return callback(err);
fulfilledNames[compiler.name] = true;
runCompilers(callback);
});
}, callback);
};
runCompilers(callback);
}
watch(watchOptions, handler) {
let watchings = [];
let allStats = this.compilers.map(() => null);
let compilerStatus = this.compilers.map(() => false);
this.runWithDependencies(this.compilers, (compiler, callback) => {
const compilerIdx = this.compilers.indexOf(compiler);
let firstRun = true;
let watching = compiler.watch(Array.isArray(watchOptions) ? watchOptions[compilerIdx] : watchOptions, (err, stats) => {
if(err)
handler(err);
if(stats) {
allStats[compilerIdx] = stats;
compilerStatus[compilerIdx] = "new";
if(compilerStatus.every(Boolean)) {
const freshStats = allStats.filter((s, idx) => {
return compilerStatus[idx] === "new";
});
compilerStatus.fill(true);
const multiStats = new MultiStats(freshStats);
handler(null, multiStats);
}
}
if(firstRun && !err) {
firstRun = false;
callback();
}
});
watchings.push(watching);
}, () => {
// ignore
});
return new MultiWatching(watchings, this);
}
run(callback) {
const allStats = this.compilers.map(() => null);
this.runWithDependencies(this.compilers, ((compiler, callback) => {
const compilerIdx = this.compilers.indexOf(compiler);
compiler.run((err, stats) => {
if(err) return callback(err);
allStats[compilerIdx] = stats;
callback();
});
}), (err) => {
if(err) return callback(err);
callback(null, new MultiStats(allStats));
});
}
purgeInputFileSystem() {
this.compilers.forEach((compiler) => {
if(compiler.inputFileSystem && compiler.inputFileSystem.purge)
compiler.inputFileSystem.purge();
});
}
};