coverage.yml

name: Update Coverage Badge

on:
  workflow_run:
    workflows: ["CI"]
    types:
      - completed
    branches: [main]

permissions:
  contents: write

jobs:
  update-badge:
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'success' }}
    
    steps:
    - uses: actions/checkout@v4
    
    - name: Download coverage artifact
      uses: actions/download-artifact@v4
      continue-on-error: true
      id: download
      with:
        name: coverage-percentage
        github-token: ${{ secrets.GITHUB_TOKEN }}
        run-id: ${{ github.event.workflow_run.id }}
    
    - name: Update README badge
      if: steps.download.outcome == 'success'
      run: |
        # Check if coverage file exists
        if [ ! -f "coverage-percentage.json" ]; then
          echo "Coverage percentage file not found, skipping"
          exit 0
        fi
        
        # Read coverage percentage
        COVERAGE=$(jq -r '.coverage' coverage-percentage.json)
        
        # Determine color based on coverage
        if (( $(echo "$COVERAGE >= 90" | bc -l) )); then
          COLOR="brightgreen"
        elif (( $(echo "$COVERAGE >= 80" | bc -l) )); then
          COLOR="green"  
        elif (( $(echo "$COVERAGE >= 70" | bc -l) )); then
          COLOR="yellow"
        elif (( $(echo "$COVERAGE >= 60" | bc -l) )); then
          COLOR="orange"
        else
          COLOR="red"
        fi
        
        echo "Updating coverage badge to ${COVERAGE}% with color ${COLOR}"
        
        # Update README.md with new badge
        sed -i "s|Coverage-[0-9.]*%25-[a-z]*|Coverage-${COVERAGE}%25-${COLOR}|g" README.md
        
    - name: Check if README changed
      id: check-changes
      run: |
        if git diff --exit-code README.md; then
          echo "changed=false" >> $GITHUB_OUTPUT
          echo "Coverage badge is already up to date"
        else
          echo "changed=true" >> $GITHUB_OUTPUT
          echo "Coverage badge needs updating"
        fi
        
    - name: Commit updated README
      if: steps.check-changes.outputs.changed == 'true'
      run: |
        git config user.name "github-actions[bot]"
        git config user.email "github-actions[bot]@users.noreply.github.com"
        git add README.md
        git commit -m "chore: update coverage badge to $(jq -r '.coverage' coverage-percentage.json)% [skip ci]"
        git push