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fix(core): avoid migration error when non-existent symbol is imported (#36367)

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In rare cases a project with configured `rootDirs` that has imports to
non-existent identifiers could fail in the migration.

This happens because based on the application code, the migration could
end up trying to resolve the `ts.Symbol` of such non-existent
identifiers. This isn't a problem usually, but due to a upstream bug
in the TypeScript compiler, a runtime error is thrown.

This is because TypeScript is unable to compute a relative path from the
originating source file to the imported source file which _should_
provide the non-existent identifier. An issue for this has been reported
upstream: https://github.com/microsoft/TypeScript/issues/37731. The
issue only surfaces since our migrations don't provide an absolute base
path that is used for resolving the root directories.

To fix this, we ensure that we never use relative paths when parsing
tsconfig files. More details can be found in the TS issue.

Fixes #36346.

PR Close #36367
This commit is contained in:
Paul Gschwendtner
2020-04-02 11:01:43 +02:00
committed by Kara Erickson
parent 56af303dc3
commit dff52ecb11
11 changed files with 209 additions and 106 deletions
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10
packages/core/schematics/migrations/template-var-assignment/index.ts
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@ -8,13 +8,11 @@
import {logging, normalize} from '@angular-devkit/core';
import {Rule, SchematicContext, SchematicsException, Tree} from '@angular-devkit/schematics';
import {dirname, relative} from 'path';
import * as ts from 'typescript';
import {relative} from 'path';
import {NgComponentTemplateVisitor} from '../../utils/ng_component_template';
import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
import {createMigrationCompilerHost} from '../../utils/typescript/compiler_host';
import {parseTsconfigFile} from '../../utils/typescript/parse_tsconfig';
import {createMigrationProgram} from '../../utils/typescript/compiler_host';
import {analyzeResolvedTemplate} from './analyze_template';
@ -47,9 +45,7 @@ export default function(): Rule {
*/
function runTemplateVariableAssignmentCheck(
tree: Tree, tsconfigPath: string, basePath: string, logger: Logger) {
const parsed = parseTsconfigFile(tsconfigPath, dirname(tsconfigPath));
const host = createMigrationCompilerHost(tree, parsed.options, basePath);
const program = ts.createProgram(parsed.fileNames, parsed.options, host);
const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
const typeChecker = program.getTypeChecker();
const templateVisitor = new NgComponentTemplateVisitor(typeChecker);
const sourceFiles = program.getSourceFiles().filter(