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perf(compiler): only emit changed files for incremental compilation

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For now, we always create all generated files, but diff them
before we pass them to TypeScript.

For the user files, we compare the programs and only emit changed
TypeScript files.

This also adds more diagnostic messages if the `—diagnostics` flag
is passed to the command line.
This commit is contained in:
Tobias Bosch
2017-09-29 15:02:11 -07:00
committed by Alex Rickabaugh
parent b0868915ae
commit 745b59f49c
15 changed files with 424 additions and 94 deletions
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9
packages/compiler-cli/src/transformers/node_emitter_transform.ts
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@ -10,6 +10,7 @@ import {GeneratedFile} from '@angular/compiler';
import * as ts from 'typescript';
import {TypeScriptNodeEmitter} from './node_emitter';
import {GENERATED_FILES} from './util';
const PREAMBLE = `/**
* @fileoverview This file is generated by the Angular template compiler.
@ -18,17 +19,17 @@ const PREAMBLE = `/**
* tslint:disable
*/`;
export function getAngularEmitterTransformFactory(generatedFiles: GeneratedFile[]): () =>
export function getAngularEmitterTransformFactory(generatedFiles: Map<string, GeneratedFile>): () =>
(sourceFile: ts.SourceFile) => ts.SourceFile {
return function() {
const map = new Map(generatedFiles.filter(g => g.stmts && g.stmts.length)
.map<[string, GeneratedFile]>(g => [g.genFileUrl, g]));
const emitter = new TypeScriptNodeEmitter();
return function(sourceFile: ts.SourceFile): ts.SourceFile {
const g = map.get(sourceFile.fileName);
const g = generatedFiles.get(sourceFile.fileName);
if (g && g.stmts) {
const [newSourceFile] = emitter.updateSourceFile(sourceFile, g.stmts, PREAMBLE);
return newSourceFile;
} else if (GENERATED_FILES.test(sourceFile.fileName)) {
return ts.updateSourceFileNode(sourceFile, []);
}
return sourceFile;
};