236 lines
6.4 KiB
JavaScript
236 lines
6.4 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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"use strict";
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const Tapable = require("tapable").Tapable;
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const SyncHook = require("tapable").SyncHook;
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const MultiHook = require("tapable").MultiHook;
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const asyncLib = require("neo-async");
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const MultiWatching = require("./MultiWatching");
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const MultiStats = require("./MultiStats");
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module.exports = class MultiCompiler extends Tapable {
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constructor(compilers) {
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super();
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this.hooks = {
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done: new SyncHook(["stats"]),
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invalid: new MultiHook(compilers.map(c => c.hooks.invalid)),
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run: new MultiHook(compilers.map(c => c.hooks.run)),
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watchClose: new SyncHook([]),
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watchRun: new MultiHook(compilers.map(c => c.hooks.watchRun))
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};
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if(!Array.isArray(compilers)) {
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compilers = Object.keys(compilers).map((name) => {
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compilers[name].name = name;
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return compilers[name];
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});
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}
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this.compilers = compilers;
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let doneCompilers = 0;
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let compilerStats = [];
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let index = 0;
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for(const compiler of this.compilers) {
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let compilerDone = false;
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const compilerIndex = index++;
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compiler.hooks.done.tap("MultiCompiler", stats => { // eslint-disable-line no-loop-func
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if(!compilerDone) {
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compilerDone = true;
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doneCompilers++;
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}
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compilerStats[compilerIndex] = stats;
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if(doneCompilers === this.compilers.length) {
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this.hooks.done.call(new MultiStats(compilerStats));
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}
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});
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compiler.hooks.invalid.tap("MultiCompiler", () => { // eslint-disable-line no-loop-func
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if(compilerDone) {
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compilerDone = false;
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doneCompilers--;
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}
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});
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}
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}
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get outputPath() {
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let commonPath = this.compilers[0].outputPath;
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for(const compiler of this.compilers) {
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while(compiler.outputPath.indexOf(commonPath) !== 0 && /[/\\]/.test(commonPath)) {
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commonPath = commonPath.replace(/[/\\][^/\\]*$/, "");
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}
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}
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if(!commonPath && this.compilers[0].outputPath[0] === "/") return "/";
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return commonPath;
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}
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get inputFileSystem() {
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throw new Error("Cannot read inputFileSystem of a MultiCompiler");
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}
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get outputFileSystem() {
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throw new Error("Cannot read outputFileSystem of a MultiCompiler");
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}
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set inputFileSystem(value) {
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for(const compiler of this.compilers) {
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compiler.inputFileSystem = value;
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}
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}
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set outputFileSystem(value) {
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for(const compiler of this.compilers) {
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compiler.outputFileSystem = value;
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}
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}
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validateDependencies(callback) {
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const edges = new Set();
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const missing = [];
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const targetFound = (compiler) => {
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for(const edge of edges) {
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if(edge.target === compiler) {
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return true;
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}
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}
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return false;
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};
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const sortEdges = (e1, e2) => {
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return e1.source.name.localeCompare(e2.source.name) ||
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e1.target.name.localeCompare(e2.target.name);
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};
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for(const source of this.compilers) {
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if(source.dependencies) {
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for(const dep of source.dependencies) {
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const target = this.compilers.find((c) => c.name === dep);
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if(!target) {
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missing.push(dep);
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} else {
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edges.add({
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source,
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target
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});
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}
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}
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}
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}
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const errors = missing.map((m) => `Compiler dependency \`${m}\` not found.`);
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const stack = this.compilers.filter((c) => !targetFound(c));
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while(stack.length > 0) {
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const current = stack.pop();
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for(const edge of edges) {
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if(edge.source === current) {
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edges.delete(edge);
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const target = edge.target;
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if(!targetFound(target)) {
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stack.push(target);
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}
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}
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}
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}
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if(edges.size > 0) {
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const lines = Array.from(edges).sort(sortEdges).map(edge => `${edge.source.name} -> ${edge.target.name}`);
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lines.unshift("Circular dependency found in compiler dependencies.");
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errors.unshift(lines.join("\n"));
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}
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if(errors.length > 0) {
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const message = errors.join("\n");
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callback(new Error(message));
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return false;
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}
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return true;
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}
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runWithDependencies(compilers, fn, callback) {
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const fulfilledNames = new Set();
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let remainingCompilers = compilers;
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const isDependencyFulfilled = (d) => fulfilledNames.has(d);
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const getReadyCompilers = () => {
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let readyCompilers = [];
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let list = remainingCompilers;
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remainingCompilers = [];
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for(const c of list) {
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const ready = !c.dependencies || c.dependencies.every(isDependencyFulfilled);
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if(ready)
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readyCompilers.push(c);
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else
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remainingCompilers.push(c);
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}
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return readyCompilers;
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};
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const runCompilers = (callback) => {
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if(remainingCompilers.length === 0) return callback();
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asyncLib.map(getReadyCompilers(), (compiler, callback) => {
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fn(compiler, (err) => {
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if(err) return callback(err);
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fulfilledNames.add(compiler.name);
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runCompilers(callback);
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});
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}, callback);
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};
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runCompilers(callback);
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}
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watch(watchOptions, handler) {
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let watchings = [];
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let allStats = this.compilers.map(() => null);
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let compilerStatus = this.compilers.map(() => false);
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if(this.validateDependencies(handler)) {
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this.runWithDependencies(this.compilers, (compiler, callback) => {
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const compilerIdx = this.compilers.indexOf(compiler);
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let firstRun = true;
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let watching = compiler.watch(Array.isArray(watchOptions) ? watchOptions[compilerIdx] : watchOptions, (err, stats) => {
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if(err)
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handler(err);
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if(stats) {
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allStats[compilerIdx] = stats;
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compilerStatus[compilerIdx] = "new";
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if(compilerStatus.every(Boolean)) {
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const freshStats = allStats.filter((s, idx) => {
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return compilerStatus[idx] === "new";
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});
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compilerStatus.fill(true);
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const multiStats = new MultiStats(freshStats);
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handler(null, multiStats);
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}
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}
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if(firstRun && !err) {
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firstRun = false;
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callback();
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}
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});
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watchings.push(watching);
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}, () => {
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// ignore
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});
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}
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return new MultiWatching(watchings, this);
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}
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run(callback) {
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const allStats = this.compilers.map(() => null);
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if(this.validateDependencies(callback)) {
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this.runWithDependencies(this.compilers, ((compiler, callback) => {
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const compilerIdx = this.compilers.indexOf(compiler);
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compiler.run((err, stats) => {
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if(err) return callback(err);
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allStats[compilerIdx] = stats;
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callback();
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});
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}), (err) => {
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if(err) return callback(err);
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callback(null, new MultiStats(allStats));
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});
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}
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}
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purgeInputFileSystem() {
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for(const compiler of this.compilers) {
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if(compiler.inputFileSystem && compiler.inputFileSystem.purge)
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compiler.inputFileSystem.purge();
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}
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}
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};
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