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feat(ngcc): enable migrations to apply schematics to libraries (#33362) 

When upgrading an Angular application to a new version using the Angular
CLI, built-in schematics are being run to update user code from
deprecated patterns to the new way of working. For libraries that have
been built for older versions of Angular however, such schematics have
not been executed which means that deprecated code patterns may still be
present, potentially resulting in incorrect behavior.

Some of the logic of schematics has been ported over to ngcc migrations,
which are automatically run on libraries. These migrations achieve the
same goal of the regular schematics, but operating on published library
sources instead of used code.

PR Close #33362
This commit is contained in:
JoostK 2019-10-20 23:36:04 +02:00 committed by Andrew Kushnir
parent 2e5e1dd5f5
commit 6b267482d7
2 changed files with 31 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
packages/compiler-cli/ngcc/src/analysis/decoration_analyzer.ts
View File

@ -7,6 +7,7 @@
*/
import {ConstantPool} from '@angular/compiler';
import * as ts from 'typescript';
import {BaseDefDecoratorHandler, ComponentDecoratorHandler, DirectiveDecoratorHandler, InjectableDecoratorHandler, NgModuleDecoratorHandler, PipeDecoratorHandler, ReferencesRegistry, ResourceLoader} from '../../../src/ngtsc/annotations';
import {CycleAnalyzer, ImportGraph} from '../../../src/ngtsc/cycles';
import {isFatalDiagnosticError} from '../../../src/ngtsc/diagnostics';
@ -18,9 +19,12 @@ import {ClassDeclaration} from '../../../src/ngtsc/reflection';
import {LocalModuleScopeRegistry, MetadataDtsModuleScopeResolver} from '../../../src/ngtsc/scope';
import {CompileResult, DecoratorHandler, DetectResult, HandlerPrecedence} from '../../../src/ngtsc/transform';
import {NgccClassSymbol, NgccReflectionHost} from '../host/ngcc_host';
import {Migration, MigrationHost} from '../migrations/migration';
import {Migration} from '../migrations/migration';
import {MissingInjectableMigration} from '../migrations/missing_injectable_migration';
import {UndecoratedParentMigration} from '../migrations/undecorated_parent_migration';
import {EntryPointBundle} from '../packages/entry_point_bundle';
import {isDefined} from '../utils';
import {DefaultMigrationHost} from './migration_host';
import {AnalyzedClass, AnalyzedFile, CompiledClass, CompiledFile, DecorationAnalyses} from './types';
import {analyzeDecorators, isWithinPackage} from './util';
@ -100,7 +104,7 @@ export class DecorationAnalyzer {
this.reflectionHost, this.evaluator, this.metaRegistry, NOOP_DEFAULT_IMPORT_RECORDER,
this.isCore),
];
migrations: Migration[] = [];
migrations: Migration[] = [new UndecoratedParentMigration(), new MissingInjectableMigration()];
constructor(
private fs: FileSystem, private bundle: EntryPointBundle,
@ -118,10 +122,9 @@ export class DecorationAnalyzer {
.filter(sourceFile => isWithinPackage(this.packagePath, sourceFile))
.map(sourceFile => this.analyzeFile(sourceFile))
.filter(isDefined);
const migrationHost = new DefaultMigrationHost(
this.reflectionHost, this.fullMetaReader, this.evaluator, this.handlers,
this.bundle.entryPoint.path, analyzedFiles);
analyzedFiles.forEach(analyzedFile => this.migrateFile(migrationHost, analyzedFile));
this.applyMigrations(analyzedFiles);
analyzedFiles.forEach(analyzedFile => this.resolveFile(analyzedFile));
const compiledFiles = analyzedFiles.map(analyzedFile => this.compileFile(analyzedFile));
compiledFiles.forEach(
@ -147,9 +150,14 @@ export class DecorationAnalyzer {
return analyzedClass;
}
protected migrateFile(migrationHost: MigrationHost, analyzedFile: AnalyzedFile): void {
analyzedFile.analyzedClasses.forEach(({declaration}) => {
protected applyMigrations(analyzedFiles: AnalyzedFile[]): void {
const migrationHost = new DefaultMigrationHost(
this.reflectionHost, this.fullMetaReader, this.evaluator, this.handlers,
this.bundle.entryPoint.path, analyzedFiles);
this.migrations.forEach(migration => {
analyzedFiles.forEach(analyzedFile => {
analyzedFile.analyzedClasses.forEach(({declaration}) => {
try {
const result = migration.apply(declaration, migrationHost);
if (result !== null) {
@ -164,6 +172,7 @@ export class DecorationAnalyzer {
}
});
});
});
}
protected compileFile(analyzedFile: AnalyzedFile): CompiledFile {

4
packages/compiler-cli/ngcc/test/analysis/decoration_analyzer_spec.ts
View File

@ -199,10 +199,10 @@ runInEachFileSystem(() => {
it('should call `apply()` on each migration for each class', () => {
expect(migrationLogs).toEqual([
'migration1:MyComponent',
'migration2:MyComponent',
'migration1:MyDirective',
'migration2:MyDirective',
'migration1:MyOtherComponent',
'migration2:MyComponent',
'migration2:MyDirective',
'migration2:MyOtherComponent',
]);
});