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build(broccoli-typescript): do a global emit during the first run 

reduces the time spent in TSC for the initial build to 1 sec (down from 23sec).
This commit is contained in:
Igor Minar 2015-05-14 10:35:01 -07:00
parent 37a8f1037e
commit c54f5e0ba2
1 changed files with 59 additions and 18 deletions
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77
tools/broccoli/broccoli-typescript.ts
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@ -29,6 +29,7 @@ class DiffingTSCompiler implements DiffingBroccoliPlugin {
private rootFilePaths: string[];
private tsServiceHost: ts.LanguageServiceHost;
private tsService: ts.LanguageService;
private firstRun: boolean = true;
static includeExtensions = ['.ts'];
static excludeExtensions = ['.d.ts'];
@ -76,25 +77,50 @@ class DiffingTSCompiler implements DiffingBroccoliPlugin {
fs.unlinkSync(path.join(this.cachePath, dtsFilePath));
});
pathsToEmit.forEach((tsFilePath) => {
let output = this.tsService.getEmitOutput(tsFilePath);
if (this.firstRun) {
this.firstRun = false;
let program = this.tsService.getProgram();
let emitResult = program.emit(undefined, function(absoluteFilePath, fileContent) {
fse.mkdirsSync(path.dirname(absoluteFilePath));
fs.writeFileSync(absoluteFilePath, fileContent, FS_OPTS);
});
if (output.emitSkipped) {
let errorFound = this.logError(tsFilePath);
if (errorFound) {
pathsWithErrors.push(tsFilePath);
}
} else {
output.outputFiles.forEach(o => {
let destDirPath = path.dirname(o.name);
fse.mkdirsSync(destDirPath);
fs.writeFileSync(o.name, o.text, FS_OPTS);
if (emitResult.emitSkipped) {
let allDiagnostics = ts.getPreEmitDiagnostics(program).concat(emitResult.diagnostics);
let errorMessages = [];
allDiagnostics.forEach(diagnostic => {
var { line, character } = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
var message = ts.flattenDiagnosticMessageText(diagnostic.messageText, '\n');
errorMessages.push(` ${diagnostic.file.fileName} (${line + 1},${character + 1}): ${message}`);
});
}
});
if (pathsWithErrors.length) {
throw new Error('Typescript found errors listed above...');
if (errorMessages.length) {
console.log(errorMessages.join('\n'));
throw new Error('Typescript found errors listed above...');
}
}
} else {
pathsToEmit.forEach((tsFilePath) => {
let output = this.tsService.getEmitOutput(tsFilePath);
if (output.emitSkipped) {
let errorFound = this.logError(tsFilePath);
if (errorFound) {
pathsWithErrors.push(tsFilePath);
}
} else {
output.outputFiles.forEach(o => {
let destDirPath = path.dirname(o.name);
fse.mkdirsSync(destDirPath);
fs.writeFileSync(o.name, o.text, FS_OPTS);
});
}
});
if (pathsWithErrors.length) {
throw new Error('Typescript found errors listed above...');
}
}
}
@ -140,9 +166,24 @@ class CustomLanguageServiceHost implements ts.LanguageServiceHost {
}
/**
* This method is called quite a bit to lookup 3 kinds of paths:
* 1/ files in the fileRegistry
* - these are the files in our project that we are watching for changes
* - in the future we could add caching for these files and invalidate the cache when
* the file is changed lazily during lookup
* 2/ .d.ts and library files not in the fileRegistry
* - these are not our files, they come from tsd or typescript itself
* - these files change only rarely but since we need them very rarely, it's not worth the
* cache invalidation hassle to cache them
* 3/ bogus paths that typescript compiler tries to lookup during import resolution
* - these paths are tricky to cache since files come and go and paths that was bogus in the
* past might not be bogus later
*
* In the initial experiments the impact of this caching was insignificant (single digit %) and
* not worth the potential issues with stale cache records.
*/
getScriptSnapshot(tsFilePath: string): ts.IScriptSnapshot {
// TODO: this method is called a lot, add cache
let absoluteTsFilePath = (tsFilePath == this.defaultLibFilePath) ?
tsFilePath :
path.join(this.treeInputPath, tsFilePath);