angular-docs-cn/packages/core/schematics/migrations/activated-route-snapshot-fr.../index.ts

63 lines
2.2 KiB
TypeScript

/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {Rule, SchematicsException, Tree} from '@angular-devkit/schematics';
import {relative} from 'path';
import * as ts from 'typescript';
import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
import {findFragmentAccesses, migrateActivatedRouteSnapshotFragment} from './util';
/**
* Migration that marks accesses of `ActivatedRouteSnapshot.fragment` as non-null.
*/
export default function(): Rule {
return (tree: Tree) => {
const {buildPaths, testPaths} = getProjectTsConfigPaths(tree);
const basePath = process.cwd();
const allPaths = [...buildPaths, ...testPaths];
if (!allPaths.length) {
throw new SchematicsException(
'Could not find any tsconfig file. Cannot migrate ' +
'`ActivatedRouteSnapshot.fragment` accesses.');
}
for (const tsconfigPath of allPaths) {
runActivatedRouteSnapshotFragmentMigration(tree, tsconfigPath, basePath);
}
};
}
function runActivatedRouteSnapshotFragmentMigration(
tree: Tree, tsconfigPath: string, basePath: string) {
const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
const typeChecker = program.getTypeChecker();
const sourceFiles =
program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
const printer = ts.createPrinter();
sourceFiles.forEach(sourceFile => {
const nodesToMigrate = findFragmentAccesses(typeChecker, sourceFile);
if (nodesToMigrate.size > 0) {
const update = tree.beginUpdate(relative(basePath, sourceFile.fileName));
nodesToMigrate.forEach(node => {
update.remove(node.getStart(), node.getWidth());
update.insertRight(
node.getStart(),
printer.printNode(
ts.EmitHint.Unspecified, migrateActivatedRouteSnapshotFragment(node), sourceFile));
});
tree.commitUpdate(update);
}
});
}