build-and-test.yml

# This workflow builds and tests our Python application.
name: Build and Test
run-name: ${{ github.actor }} launched the Build-and-Test workflow 🚀
on:
  push:
    paths:
      - 'app/**' # Only run if our push contains a file in the app folder

  pull_request:
    branches:
      - 'master' # This ensures the workflow also runs when merging
    paths:
      - 'app/**' # Only run if our push contains a file in the app folder
  
  workflow_dispatch:  # Allows manual triggering of the workflow.

permissions:
  contents: read

env:
  PROJECT_ID: ${{ secrets.GCP_PROJECT_ID }}
  SVC_ACCOUNT: ${{ secrets.GCP_SVC_ACCOUNT }}
  GOOGLE_APPLICATION_CREDENTIALS: ${{ github.workspace }}/${{ secrets.GCP_SVC_ACCOUNT }}.json
  SVC_ACCOUNT_EMAIL: ${{ secrets.GCP_SVC_ACCOUNT }}@${{ secrets.GCP_PROJECT_ID }}.iam.gserviceaccount.com
  REGION: ${{ vars.GCP_REGION }} 
  FUNCTIONS_PORT: ${{ vars.GCP_DEV_FUNCTIONS_PORT}}
  FLASK_RUN_PORT: ${{ vars.FLASK_RUN_PORT }}
  BACKEND_GCF: https://${{ vars.GCP_REGION }}-${{ secrets.GCP_PROJECT_ID }}.${{ vars.GCP_FUNCTION_URI_SUFFIX }}

jobs: 
  build_and_test:
    runs-on: ubuntu-latest

    # Use the matrix strategy to run build and test steps for both backend_gcf and ui_cr
    # This allows us to re-use this job and run it for each application folder
    strategy:
      matrix:
        app-folder:
          - app/backend_gcf
          - app/ui_cr

    steps:
    - uses: actions/checkout@v4

    - name: Check env vars
      run: |
        echo "Environment variables configured:"
        echo PROJECT_ID="$PROJECT_ID"
        echo REGION="$REGION"
        echo SVC_ACCOUNT="$SVC_ACCOUNT"
        echo SVC_ACCOUNT_EMAIL="$SVC_ACCOUNT_EMAIL"
        echo GOOGLE_APPLICATION_CREDENTIALS="$GOOGLE_APPLICATION_CREDENTIALS"
        echo BACKEND_GCF="$BACKEND_GCF"
        echo FUNCTIONS_PORT="$FUNCTIONS_PORT"
        echo FLASK_RUN_PORT="$FLASK_RUN_PORT"    
    
    # Creates a credentials file that will be used for ADC later
    - name: Create credentials file
      run: |
        echo "${{ secrets.GCP_SVC_ACCOUNT_CREDS }}" | base64 --decode > $GOOGLE_APPLICATION_CREDENTIALS
        echo "Checking the credentials:"
        head -n 3 $GOOGLE_APPLICATION_CREDENTIALS
      shell: bash

    - name: Set up Python 3.10
      uses: actions/setup-python@v5
      with:
        python-version: "3.10"
        cache: 'pip' # caching pip dependencies        
        
    - name: Install dependencies
      run: |
        echo "Installing Python dependencies"
        python -m pip install --upgrade pip
        pip install flake8 pytest
        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
        
    - name: Lint with flake8
      working-directory: ${{ matrix.app-folder }}
      run: |
        # stop the build if there are Python syntax errors or undefined names
        echo "Running first flake8:"
        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
        echo "Flake8 exit code: $?"
        echo "Running second flake8:"
        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
        echo "Flake8 exit code: $?"
        
    - name: Test with pytest
      working-directory: ${{ matrix.app-folder }}    
      run: |
        pytest || if [ $? -eq 5 ]; then echo "No tests were found, but continuing..."; else exit 1; fi