[BUG] firebase-tools HTTP Error 500

[konahart]

Action config

# This file was auto-generated by the Firebase CLI
# https://github.com/firebase/firebase-tools

name: Deploy to Firebase Hosting on PR
'on': pull_request
jobs:
  build_and_preview:
    if: '${{ github.event.pull_request.head.repo.full_name == github.repository }}'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
        with:
          node-version: '16'
      - run: npm --version
      - run: npm ci && npm run build
      - uses: FirebaseExtended/action-hosting-deploy@v0
        with:
          repoToken: '${{ secrets.GITHUB_TOKEN }}'
          firebaseServiceAccount: '${{ secrets.FIREBASE_SERVICE_ACCOUNT_PROJECT_ID }}'
          projectId: project-id

Error message

Deploying to Firebase preview channel pr1-firebase-deploy
  /opt/hostedtoolcache/node/16.11.1/x64/bin/npx firebase-tools hosting:channel:deploy pr1-firebase-deploy --expires 7d --project project-id --json
  npm WARN exec The following package was not found and will be installed: firebase-tools
  npm WARN deprecated har-validator@5.1.5: this library is no longer supported
  npm WARN deprecated uuid@3.4.0: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
  npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
  ***
    "status": "error",
    "error": "HTTP Error: 500, Internal error encountered."
  ***
  ***
    "status": "error",
    "error": "HTTP Error: 500, Internal error encountered."
  ***

Expected behavior

Action runner finds and installs firebase-tools.

Actual behavior

HTTP Error 500, which causes npx to exit code 2

[konahart]

It turns out that this had to do with the dummy configuration data in my repo was not getting properly replaced by a build step. With the correct configuration in place, this action worked as expected.