diff.yaml

on:
  pull_request:
    branches: [main]

name: Crossplane Dynamic Diff

jobs:
  pr:
    name: prepare
    runs-on: ubuntu-latest
    steps:
      - name: Setup QEMU
        uses: docker/setup-qemu-action@v2
        with:
          platforms: all 
      - name: Check out current commit
        uses: actions/checkout@v4
      - name: Install Go
        uses: actions/setup-go@v4
      - name: Install yq
        run: |
          sudo add-apt-repository ppa:rmescandon/yq
          sudo apt-get update
          sudo apt-get install yq
      - name: Install Crossplane CLI
        run: go install github.com/crossplane/crossplane/cmd/crank@latest

      # Discover YAML files and their annotations
      - name: Discover YAML files
        run: |
          EXAMPLES_PATH="examples"
          YAML_FILES=($(find $EXAMPLES_PATH -type f -name '*.yaml'))
          INPUT_FILES=""
          for file in "${YAML_FILES[@]}"; do
            COMPOSITION=$(yq eval '.metadata.annotations."crossplane.io/render-composition-path"' $file)
            FUNCTION=$(yq eval '.metadata.annotations."crossplane.io/render-function-path"' $file)

            # Skip files where both annotations are null
            if [[ "$COMPOSITION" == "null" && "$FUNCTION" == "null" ]]; then
              continue
            fi

            INPUT_FILES+="$file,$COMPOSITION,$FUNCTION "
          done
          echo "INPUT_FILES=${INPUT_FILES}" >> $GITHUB_ENV

      # Run a dynamic job for each input file
      - name: Run Dynamic Jobs
        run: |
          IFS=' ' read -ra INPUT_FILES <<< "${{ env.INPUT_FILES }}"
          for files in "${INPUT_FILES[@]}"; do
            IFS=',' read -ra FILE_ARRAY <<< "$files"
            FILE="${FILE_ARRAY[0]}"
            COMPOSITION="${FILE_ARRAY[1]}"
            FUNCTION="${FILE_ARRAY[2]}"

            # Skip files where both annotations are null
            if [[ "$COMPOSITION" == "null" && "$FUNCTION" == "null" ]]; then
              continue
            fi

            crank beta render $FILE $COMPOSITION $FUNCTION >> diff-pr-${FILE//\//-}.yaml
          done

      - name: Install Python
        uses: actions/setup-python@v4

      # Sort YAML files
      - name: Sort YAML files
        run: |
          for file in diff-pr-*.yaml; do
            python3 -c "import yaml; data = list(yaml.load_all(open('$file'), Loader=yaml.FullLoader)); data.sort(key=lambda x: (x.get('kind', ''), str(x.get('metadata', {}).get('annotations', '')))); yaml.dump_all(data, open('$file', 'w'), default_flow_style=False)"
          done

      # Store outputs as artifacts
      - name: Store outputs
        uses: actions/upload-artifact@v3
        with:
          name: diff-pr-${{ github.sha }}
          path: diff-*.yaml

  main:
    name: diff
    needs: [pr]
    runs-on: ubuntu-latest
    steps:
      - name: Setup QEMU
        uses: docker/setup-qemu-action@v2
        with:
          platforms: all
      - name: Install Go
        uses: actions/setup-go@v4
      - name: Install yq
        run: |
          sudo add-apt-repository ppa:rmescandon/yq
          sudo apt-get update
          sudo apt-get install yq
      - name: Install Crossplane CLI
        run: go install github.com/crossplane/crossplane/cmd/crank@latest

      - name: Check out main
        uses: actions/checkout@v4
        with:
          ref: main
  
      # Download artifacts from the dynamic job
      - name: Download artifacts
        uses: actions/download-artifact@v2
        with:
          name: diff-pr-${{ github.sha }}

      # Discover YAML files and their annotations
      - name: Discover YAML files
        run: |
          EXAMPLES_PATH="examples"
          YAML_FILES=($(find $EXAMPLES_PATH -type f -name '*.yaml'))
          INPUT_FILES=""
          for file in "${YAML_FILES[@]}"; do
            COMPOSITION=$(yq eval '.metadata.annotations."crossplane.io/render-composition-path"' $file)
            FUNCTION=$(yq eval '.metadata.annotations."crossplane.io/render-function-path"' $file)

            # Skip files where both annotations are null
            if [[ "$COMPOSITION" == "null" && "$FUNCTION" == "null" ]]; then
              continue
            fi

            INPUT_FILES+="$file,$COMPOSITION,$FUNCTION "
          done
          echo "INPUT_FILES=${INPUT_FILES}" >> $GITHUB_ENV

      # Run a dynamic job for each input file
      - name: Run Dynamic Jobs
        run: |
          IFS=' ' read -ra INPUT_FILES <<< "${{ env.INPUT_FILES }}"
          for files in "${INPUT_FILES[@]}"; do
            IFS=',' read -ra FILE_ARRAY <<< "$files"
            FILE="${FILE_ARRAY[0]}"
            COMPOSITION="${FILE_ARRAY[1]}"
            FUNCTION="${FILE_ARRAY[2]}"

            # Skip files where both annotations are null
            if [[ "$COMPOSITION" == "null" && "$FUNCTION" == "null" ]]; then
              continue
            fi

            crank beta render $FILE $COMPOSITION $FUNCTION >> diff-main-${FILE//\//-}.yaml
          done

      - name: Install Python
        uses: actions/setup-python@v4

      # Sort YAML files
      - name: Sort YAML files
        run: |
          for file in diff-main-*.yaml; do
            python3 -c "import yaml; data = list(yaml.load_all(open('$file'), Loader=yaml.FullLoader)); data.sort(key=lambda x: (x.get('kind', ''), str(x.get('metadata', {}).get('annotations', '')))); yaml.dump_all(data, open('$file', 'w'), default_flow_style=False)"
          done
      # Store outputs as artifacts
      - name: Store outputs
        uses: actions/upload-artifact@v2
        with:
          name: diff-main-${{ github.sha }}
          path: diff-main-*.yaml

      # Diff the outputs between PR and main
      - name: Diff
        id: diff_rev
        run: |
          IFS=',' read -ra INPUT_FILES <<< "$INPUT_FILES"
          for FILE in "${INPUT_FILES[@]}"; do
            IFS=' ' read -ra FILE_PATHS <<< "$FILE"
            for SUB_FILE in "${FILE_PATHS[@]}"; do
              MAIN_FILE="diff-main-${SUB_FILE//\//-}.yaml"
              PR_FILE="diff-pr-${SUB_FILE//\//-}.yaml"
              echo "Checking differences for file: $SUB_FILE"
              echo "Main file path: $MAIN_FILE"
              echo "PR file path: $PR_FILE"
              if [ -f "$MAIN_FILE" ] && [ -f "$PR_FILE" ]; then
                DELTA_NAME=$(echo "DELTA_${SUB_FILE//[\./]/_}" | tr '[:upper:]' '[:lower:]' | sed 's/\//_/g')
                DELTA_FILE="$DELTA_NAME.diff"
                echo "Setting DELTA_NAME: $DELTA_NAME"
                DELTA=$(diff -u "$MAIN_FILE" "$PR_FILE" || true)
                echo "$DELTA" > "$DELTA_FILE"
                echo "Differences found for $SUB_FILE. Diff saved in $DELTA_FILE"
              else
                echo "Either $MAIN_FILE or $PR_FILE does not exist!"
              fi
            done
          done

      - name: Generate Comment
        id: generate_comment
        run: |
          ALL_DELTAS=""

          # Iterate over all diff files
          for DELTA_FILE in $(find . -name '*.diff'); do
            echo "Processing diff file: $DELTA_FILE"

            # Debugging statement
            cat "$DELTA_FILE"

            # Ensure the file exists and is not empty
            if [ -s "$DELTA_FILE" ]; then
              # Use printf to format newlines properly
              ALL_DELTAS="${ALL_DELTAS}$(printf '\n```diff\n%s\n```' "$(cat "$DELTA_FILE")")"
              echo "ALL_DELTAS so far: $ALL_DELTAS"
            else
              echo "Diff file $DELTA_FILE is either empty or not found!"
            fi
          done

          # Debugging statement
          echo "Final ALL_DELTAS: $ALL_DELTAS"

          # Write the content to a file
          echo -e "$ALL_DELTAS" > diff_content.txt

      - name: comment PR
        uses: machine-learning-apps/pr-comment@master
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          path: diff_content.txt