helm-chart-cleanup.yml

name: Helm Chart Cleanup

on:
  push:
    branches:
      - main

permissions:
  contents: write

jobs:
  detect-and-cleanup:
    runs-on: ubuntu-latest
    # Add concurrency to prevent multiple workflows running simultaneously on the same branch
    concurrency:
      group: ${{ github.workflow }}-${{ github.ref }}
      cancel-in-progress: true
    steps:
      - name: Checkout repository (main branch)
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
          ref: main

      - name: Check for deleted Helm directories
        id: check-deleted
        run: |
          # Get list of all deleted files in this push
          DELETED_FILES=$(git diff --name-status HEAD^ HEAD | grep '^D' | awk '{print $2}')
          
          # Check if any of the deleted files are in a Helm directory
          DELETED_HELM_DIRS=""
          
          for FILE in $DELETED_FILES; do
            if [[ $FILE == */helm/* ]]; then
              # Extract app name from path (assuming directory structure like app-name/helm/...)
              APP_NAME=$(echo $FILE | cut -d'/' -f1)
              
              # Add to our list if not already there
              if [[ ! $DELETED_HELM_DIRS =~ (^|[[:space:]])$APP_NAME($|[[:space:]]) ]]; then
                DELETED_HELM_DIRS="$DELETED_HELM_DIRS $APP_NAME"
              fi
            fi
          done
          
          # Trim leading whitespace
          DELETED_HELM_DIRS=$(echo $DELETED_HELM_DIRS | xargs)
          
          if [ -n "$DELETED_HELM_DIRS" ]; then
            echo "Detected deleted Helm directories for apps: $DELETED_HELM_DIRS"
            echo "DELETED_APPS=$DELETED_HELM_DIRS" >> $GITHUB_ENV
            echo "CLEANUP_NEEDED=true" >> $GITHUB_ENV
          else
            echo "No Helm directories were deleted"
            echo "CLEANUP_NEEDED=false" >> $GITHUB_ENV
          fi

      - name: Set up Helm
        if: env.CLEANUP_NEEDED == 'true'
        uses: azure/setup-helm@v3
        with:
          version: 'latest'

      - name: Checkout gh-pages branch
        if: env.CLEANUP_NEEDED == 'true'
        uses: actions/checkout@v3
        with:
          ref: gh-pages
          path: gh-pages
          token: ${{ secrets.APP_INSTALLATION_TOKEN }}
          # Add fetch-depth: 0 to get full history
          fetch-depth: 0

      - name: Install yq
        if: env.CLEANUP_NEEDED == 'true'
        run: |
          sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
          sudo chmod +x /usr/local/bin/yq

      - name: Remove deleted charts from index.yaml
        if: env.CLEANUP_NEEDED == 'true'
        run: |
          cd gh-pages
          
          # Pull latest changes from remote first to avoid conflicts
          git fetch origin gh-pages
          git reset --hard origin/gh-pages
          
          echo "Checking for charts to remove..."
          
          # For each deleted app, check if its chart exists in index.yaml
          for APP in $DELETED_APPS; do
            echo "Processing deleted app: $APP"
            
            # Find all chart .tgz files for this app in the charts subdirectory and remove them
            CHART_FILES=$(find ./charts -name "${APP}-*.tgz" -o -name "${APP}_*.tgz" || true)
            if [ -n "$CHART_FILES" ]; then
              echo "Removing chart files: $CHART_FILES"
              rm -f $CHART_FILES
            fi
            
            # Check if this app has an entry in index.yaml
            if grep -q "name: ${APP}" index.yaml; then
              echo "Found entry for $APP in index.yaml, removing..."
              
              # Use yq to remove the entry for this app from index.yaml
              yq eval -i "del(.entries.\"${APP}\")" index.yaml
              
              echo "Successfully removed $APP from index.yaml"
            else
              echo "No entry found for $APP in index.yaml"
            fi
          done
          
          # Update the generated timestamp in index.yaml
          yq eval -i ".generated = \"$(date -u +"%Y-%m-%dT%H:%M:%S.%NZ")\"" index.yaml
          
          # Remove any existing timestamp comments
          sed -i '/^# Charts updated from main branch on/d' index.yaml
          
          # Add metadata annotation
          echo "" >> index.yaml
          echo "# Charts updated from main branch on $(date)" >> index.yaml

      - name: Commit and push to gh-pages
        if: env.CLEANUP_NEEDED == 'true'
        run: |
          cd gh-pages
          
          git config user.name "GitHub Actions Bot"
          git config user.email "actions@github.com"
          
          # Add the index.yaml file
          git add index.yaml
          
          # Remove any deleted .tgz files from git
          git ls-files --deleted | xargs -r git rm || true
          
          # Only commit if there are changes
          if git diff --staged --quiet; then
            echo "No changes to commit"
          else
            git commit -m "Remove charts for deleted apps: $DELETED_APPS"
            
            # Add retry logic for pushing
            MAX_RETRIES=5
            RETRY_COUNT=0
            
            while [ $RETRY_COUNT -lt $MAX_RETRIES ]; do
              # Pull with rebase to avoid merge conflicts
              git pull --rebase origin gh-pages || true
              
              if git push; then
                echo "Successfully pushed changes"
                break
              else
                RETRY_COUNT=$((RETRY_COUNT+1))
                if [ $RETRY_COUNT -lt $MAX_RETRIES ]; then
                  echo "Push failed, retrying in 5 seconds... (Attempt $RETRY_COUNT of $MAX_RETRIES)"
                  sleep 5
                else
                  echo "Failed to push after $MAX_RETRIES attempts"
                  exit 1
                fi
              fi
            done
          fi