angular-cn/tools/broccoli/broccoli-typescript.ts

391 lines
14 KiB
TypeScript

/// <reference path="../typings/node/node.d.ts" />
import fs = require('fs');
import fse = require('fs-extra');
import path = require('path');
import * as ts from 'typescript';
import {wrapDiffingPlugin, DiffingBroccoliPlugin, DiffResult} from './diffing-broccoli-plugin';
import {MetadataCollector} from '../metadata';
type FileRegistry = ts.Map<{version: number}>;
const FS_OPTS = {
encoding: 'utf-8'
};
// Sub-directory where the @internal typing files (.d.ts) are stored
export const INTERNAL_TYPINGS_PATH: string = 'internal_typings';
// Monkey patch the TS compiler to be able to re-emit files with @internal symbols
let tsEmitInternal: boolean = false;
const originalEmitFiles: Function = (<any>ts).emitFiles;
(<any>ts).emitFiles = function(resolver: any, host: any, targetSourceFile: any): any {
if (tsEmitInternal) {
const orignalgetCompilerOptions = host.getCompilerOptions;
host.getCompilerOptions = () => {
let options = clone(orignalgetCompilerOptions.call(host));
options.stripInternal = false;
options.outDir = `${options.outDir}/${INTERNAL_TYPINGS_PATH}`;
return options;
}
}
return originalEmitFiles(resolver, host, targetSourceFile);
};
/**
* Broccoli plugin that implements incremental Typescript compiler.
*
* It instantiates a typescript compiler instance that keeps all the state about the project and
* can re-emit only the files that actually changed.
*
* Limitations: only files that map directly to the changed source file via naming conventions are
* re-emitted. This primarily affects code that uses `const enum`s, because changing the enum value
* requires global emit, which can affect many files.
*/
class DiffingTSCompiler implements DiffingBroccoliPlugin {
private tsOpts: ts.CompilerOptions;
private fileRegistry: FileRegistry = Object.create(null);
private rootFilePaths: string[];
private tsServiceHost: ts.LanguageServiceHost;
private tsService: ts.LanguageService;
private metadataCollector: MetadataCollector;
private firstRun: boolean = true;
private previousRunFailed: boolean = false;
// Whether to generate the @internal typing files (they are only generated when `stripInternal` is
// true)
private genInternalTypings: boolean = false;
static includeExtensions = ['.ts'];
constructor(public inputPath: string, public cachePath: string, public options) {
if (options.rootFilePaths) {
this.rootFilePaths = options.rootFilePaths.splice(0);
delete options.rootFilePaths;
} else {
this.rootFilePaths = [];
}
if (options.internalTypings) {
this.genInternalTypings = true;
delete options.internalTypings;
}
// the conversion is a bit awkward, see https://github.com/Microsoft/TypeScript/issues/5276
// in 1.8 use convertCompilerOptionsFromJson
this.tsOpts =
ts.parseJsonConfigFileContent({compilerOptions: options, files: []}, null, null).options;
if ((<any>this.tsOpts).stripInternal === false) {
// @internal are included in the generated .d.ts, do not generate them separately
this.genInternalTypings = false;
}
this.tsOpts.rootDir = inputPath;
this.tsOpts.baseUrl = inputPath;
this.tsOpts.outDir = this.cachePath;
this.tsServiceHost = new CustomLanguageServiceHost(this.tsOpts, this.rootFilePaths,
this.fileRegistry, this.inputPath);
this.tsService = ts.createLanguageService(this.tsServiceHost, ts.createDocumentRegistry());
this.metadataCollector = new MetadataCollector();
}
rebuild(treeDiff: DiffResult) {
let pathsToEmit = [];
let pathsWithErrors = [];
let errorMessages = [];
treeDiff.addedPaths.concat(treeDiff.changedPaths)
.forEach((tsFilePath) => {
if (!this.fileRegistry[tsFilePath]) {
this.fileRegistry[tsFilePath] = {version: 0};
this.rootFilePaths.push(tsFilePath);
} else {
this.fileRegistry[tsFilePath].version++;
}
pathsToEmit.push(path.join(this.inputPath, tsFilePath));
});
treeDiff.removedPaths.forEach((tsFilePath) => {
console.log('removing outputs for', tsFilePath);
this.rootFilePaths.splice(this.rootFilePaths.indexOf(tsFilePath), 1);
this.fileRegistry[tsFilePath] = null;
this.removeOutputFor(tsFilePath);
});
if (this.firstRun) {
this.firstRun = false;
this.doFullBuild();
} else {
let program = this.tsService.getProgram();
let typeChecker = program.getTypeChecker();
tsEmitInternal = false;
pathsToEmit.forEach((tsFilePath) => {
let output = this.tsService.getEmitOutput(tsFilePath);
if (output.emitSkipped) {
let errorFound = this.collectErrors(tsFilePath);
if (errorFound) {
pathsWithErrors.push(tsFilePath);
errorMessages.push(errorFound);
}
} else {
output.outputFiles.forEach(o => {
let destDirPath = path.dirname(o.name);
fse.mkdirsSync(destDirPath);
fs.writeFileSync(o.name, this.fixSourceMapSources(o.text), FS_OPTS);
if (endsWith(o.name, '.d.ts')) {
const sourceFile = program.getSourceFile(tsFilePath);
this.emitMetadata(o.name, sourceFile, typeChecker);
}
});
}
});
if (pathsWithErrors.length) {
this.previousRunFailed = true;
var error =
new Error('Typescript found the following errors:\n' + errorMessages.join('\n'));
error['showStack'] = false;
throw error;
} else if (this.previousRunFailed) {
this.doFullBuild();
} else if (this.genInternalTypings) {
// serialize the .d.ts files containing @internal symbols
tsEmitInternal = true;
pathsToEmit.forEach((tsFilePath) => {
let output = this.tsService.getEmitOutput(tsFilePath);
if (!output.emitSkipped) {
output.outputFiles.forEach(o => {
if (endsWith(o.name, '.d.ts')) {
let destDirPath = path.dirname(o.name);
fse.mkdirsSync(destDirPath);
fs.writeFileSync(o.name, this.fixSourceMapSources(o.text), FS_OPTS);
}
});
}
});
tsEmitInternal = false;
}
}
}
private collectErrors(tsFilePath): String {
let allDiagnostics = this.tsService.getCompilerOptionsDiagnostics()
.concat(this.tsService.getSyntacticDiagnostics(tsFilePath))
.concat(this.tsService.getSemanticDiagnostics(tsFilePath));
let errors = [];
allDiagnostics.forEach(diagnostic => {
let message = ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n");
if (diagnostic.file) {
let {line, character} = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
errors.push(` ${diagnostic.file.fileName} (${line + 1},${character + 1}): ${message}`);
} else {
errors.push(` Error: ${message}`);
}
});
if (errors.length) {
return errors.join('\n');
}
}
private doFullBuild() {
let program = this.tsService.getProgram();
let typeChecker = program.getTypeChecker();
let diagnostics: ts.Diagnostic[] = [];
tsEmitInternal = false;
let emitResult = program.emit(undefined, (absoluteFilePath, fileContent) => {
fse.mkdirsSync(path.dirname(absoluteFilePath));
fs.writeFileSync(absoluteFilePath, this.fixSourceMapSources(fileContent), FS_OPTS);
if (endsWith(absoluteFilePath, '.d.ts')) {
// TODO: Use sourceFile from the callback if
// https://github.com/Microsoft/TypeScript/issues/7438
// is taken
const originalFile = absoluteFilePath.replace(this.tsOpts.outDir, this.tsOpts.rootDir)
.replace(/\.d\.ts$/, '.ts');
const sourceFile = program.getSourceFile(originalFile);
this.emitMetadata(absoluteFilePath, sourceFile, typeChecker);
}
});
if (this.genInternalTypings) {
// serialize the .d.ts files containing @internal symbols
tsEmitInternal = true;
program.emit(undefined, (absoluteFilePath, fileContent) => {
if (endsWith(absoluteFilePath, '.d.ts')) {
fse.mkdirsSync(path.dirname(absoluteFilePath));
fs.writeFileSync(absoluteFilePath, fileContent, FS_OPTS);
}
});
tsEmitInternal = false;
}
if (emitResult.emitSkipped) {
let allDiagnostics = ts.getPreEmitDiagnostics(program).concat(emitResult.diagnostics);
let errorMessages = [];
allDiagnostics.forEach(diagnostic => {
var pos = '';
if (diagnostic.file) {
var {line, character} = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
pos = `${diagnostic.file.fileName} (${line + 1}, ${character + 1}): `
}
var message = ts.flattenDiagnosticMessageText(diagnostic.messageText, '\n');
errorMessages.push(` ${pos}${message}`);
});
if (errorMessages.length) {
this.previousRunFailed = true;
var error =
new Error('Typescript found the following errors:\n' + errorMessages.join('\n'));
error['showStack'] = false;
throw error;
} else {
this.previousRunFailed = false;
}
}
}
/**
* Emit a .metadata.json file to correspond to the .d.ts file if the module contains classes that
* use decorators or exported constants.
*/
private emitMetadata(dtsFileName: string, sourceFile: ts.SourceFile,
typeChecker: ts.TypeChecker) {
if (sourceFile) {
const metadata = this.metadataCollector.getMetadata(sourceFile, typeChecker);
if (metadata && metadata.metadata) {
const metadataText = JSON.stringify(metadata);
const metadataFileName = dtsFileName.replace(/\.d.ts$/, '.metadata.json');
fs.writeFileSync(metadataFileName, metadataText, FS_OPTS);
}
}
}
/**
* There is a bug in TypeScript 1.6, where the sourceRoot and inlineSourceMap properties
* are exclusive. This means that the sources property always contains relative paths
* (e.g, ../../../../angular2/src/di/injector.ts).
*
* Here, we normalize the sources property and remove the ../../../
*
* This issue is fixed in https://github.com/Microsoft/TypeScript/pull/5620.
* Once we switch to TypeScript 1.8, we can remove this method.
*/
private fixSourceMapSources(content: string): string {
try {
const marker = "//# sourceMappingURL=data:application/json;base64,";
const index = content.indexOf(marker);
if (index == -1) return content;
const base = content.substring(0, index + marker.length);
const sourceMapBit =
new Buffer(content.substring(index + marker.length), 'base64').toString("utf8");
const sourceMaps = JSON.parse(sourceMapBit);
const source = sourceMaps.sources[0];
sourceMaps.sources = [source.substring(source.lastIndexOf("../") + 3)];
return `${base}${new Buffer(JSON.stringify(sourceMaps)).toString('base64')}`;
} catch (e) {
return content;
}
}
private removeOutputFor(tsFilePath: string) {
let absoluteJsFilePath = path.join(this.cachePath, tsFilePath.replace(/\.ts$/, '.js'));
let absoluteMapFilePath = path.join(this.cachePath, tsFilePath.replace(/.ts$/, '.js.map'));
let absoluteDtsFilePath = path.join(this.cachePath, tsFilePath.replace(/\.ts$/, '.d.ts'));
if (fs.existsSync(absoluteJsFilePath)) {
fs.unlinkSync(absoluteJsFilePath);
if (fs.existsSync(absoluteMapFilePath)) {
// source map could be inline or not generated
fs.unlinkSync(absoluteMapFilePath);
}
fs.unlinkSync(absoluteDtsFilePath);
}
}
}
class CustomLanguageServiceHost implements ts.LanguageServiceHost {
private currentDirectory: string;
private defaultLibFilePath: string;
constructor(private compilerOptions: ts.CompilerOptions, private fileNames: string[],
private fileRegistry: FileRegistry, private treeInputPath: string) {
this.currentDirectory = process.cwd();
this.defaultLibFilePath = ts.getDefaultLibFilePath(compilerOptions).replace(/\\/g, '/');
}
getScriptFileNames(): string[] {
return this.fileNames.map(f => path.join(this.treeInputPath, f));
}
getScriptVersion(fileName: string): string {
if (startsWith(fileName, this.treeInputPath)) {
const key = fileName.substr(this.treeInputPath.length + 1);
return this.fileRegistry[key] && this.fileRegistry[key].version.toString();
}
}
getScriptSnapshot(tsFilePath: string): ts.IScriptSnapshot {
// TypeScript seems to request lots of bogus paths during import path lookup and resolution,
// so we we just return undefined when the path is not correct.
// Ensure it is in the input tree or a lib.d.ts file.
if (!startsWith(tsFilePath, this.treeInputPath) && !tsFilePath.match(/\/lib(\..*)*.d\.ts$/)) {
if (fs.existsSync(tsFilePath)) {
console.log('Rejecting', tsFilePath, '. File is not in the input tree.');
}
return undefined;
}
// Ensure it exists
if (!fs.existsSync(tsFilePath)) {
return undefined;
}
return ts.ScriptSnapshot.fromString(fs.readFileSync(tsFilePath, FS_OPTS));
}
getCurrentDirectory(): string { return this.currentDirectory; }
getCompilationSettings(): ts.CompilerOptions { return this.compilerOptions; }
getDefaultLibFileName(options: ts.CompilerOptions): string {
// ignore options argument, options should not change during the lifetime of the plugin
return this.defaultLibFilePath;
}
}
export default wrapDiffingPlugin(DiffingTSCompiler);
function clone<T>(object: T): T {
const result: any = {};
for (const id in object) {
result[id] = (<any>object)[id];
}
return <T>result;
}
function startsWith(str: string, substring: string): boolean {
return str.substring(0, substring.length) === substring;
}
function endsWith(str: string, substring: string): boolean {
return str.indexOf(substring, str.length - substring.length) !== -1;
}