The Firebase app hosting rollout fails for an Angular 18 web app with SSR.
The rollout fails after the step:
Step #2: Running "npm exec --prefix /layers/google.nodejs.firebaseangular/npm_modules apphosting-adapter-angular-build"
with the error message:
Step #2: Error: Unable to determine the application to deploy
I have followed the 'Get started with App Hosting' (here) and other documentation, and at no point is anything mentioned about what is expected for the structure of the project.
I looked at the Angular basic starter app for Firebase App hosting (here) and I followed its angular.json to have my project compile with the same structure. No success.
One other thing I have tried was using a apphosting.yaml file but it did not help so I removed it again. See:
https://firebase.google.com/docs/app-hosting/configure
I have previously also tried with Angular 17, where the rollout also failed, therefore I thought upgrading to Angular 18 might help, but it did not.
The logs also tell me to look into Google Cloud Buildpacks:
Step #2: Our documentation explains ways to configure Buildpacks to better recognise your project:
Step #2: -> https://cloud.google.com/docs/buildpacks/overview
which is what I will do next in hopes of finding the cause of my problem.
However, any help is greatly appreciated!
I found the problem for this specific error. I was missing the @angular-devkit/core package in my package.json. Which I then installed with npm i -D @angular-devkit/core.
What got me there was looking at the source code that generated this error message on Github.
This was also where I saw that this specific error is thrown if either no project, or more than one project is found in the repo.
In my case it was thrown because the @angular-devkit/core package was missing.