ng-add expects path relative to /src/app

[darvids0n]

Description
When running ng add @ngx-formly/schematics, the installation fails if the root app module is not in the default folder, even if you provide the --module option. You need to provide a relative path to /src/app, which may not even exist (eg in my case), for it to function.

Minimal Reproduction

ng new formly-schematic-test --minimal -g --routing=false --style=scss
cd formly-schematic-test; mv src/app src/root
# Edit src/main.ts to include AppModule from the proper path.
ng add @ngx-formly/schematics --module="root/app.module.ts"

Expected result

The schematic will find the specified module by searching from project.sourceRoot, or using the working directory plus the relative path provided, and successfully configure the project.

Actual result

The schematic fails with Specified module does not exist.
Installation succeeds if --module="../root/app.module.ts" is provided.

Your Environment

• Angular version: 9.1.9
• Formly version: 5.6.2

[aitboudad]

This issue has been fixed and released as part of v5.7 release.

Please let us know, in case you are still encountering a similar issue/problem.
Thank you!