[7.x] [ts/checkTsProjects] produce a more useful error message (#83209)…

… (#83222)

Co-authored-by: spalger <[email protected]>

src/dev/typescript/run_check_ts_projects_cli.ts

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import { resolve } from 'path';
+import { resolve, relative } from 'path';
 
 import execa from 'execa';
 
@@ -35,7 +35,7 @@ export async function runCheckTsProjectsCli() {
  });
 
  const isNotInTsProject: File[] = [];
- const isInMultipleTsProjects: File[] = [];
+ const isInMultipleTsProjects: string[] = [];
 
  for (const lineRaw of files.split('\n')) {
  const line = lineRaw.trim();
@@ -56,7 +56,11 @@ export async function runCheckTsProjectsCli() {
  isNotInTsProject.push(file);
  }
  if (projects.length > 1 && !file.isTypescriptAmbient()) {
- isInMultipleTsProjects.push(file);
+ isInMultipleTsProjects.push(
+ ` - ${file.getRelativePath()}:\n${projects
+ .map((p) => ` - ${relative(process.cwd(), p.tsConfigPath)}`)
+ .join('\n')}`
+ );
  }
  }
 
@@ -74,10 +78,9 @@ export async function runCheckTsProjectsCli() {
  }
 
  if (isInMultipleTsProjects.length) {
+ const details = isInMultipleTsProjects.join('\n');
  log.error(
- `The following files belong to multiple tsconfig.json files listed in src/dev/typescript/projects.ts\n${isInMultipleTsProjects
- .map((file) => ` - ${file.getRelativePath()}`)
- .join('\n')}`
+ `The following files belong to multiple tsconfig.json files listed in src/dev/typescript/projects.ts\n${details}`
  );
  }