exporter-validate-pr.yml

name: Validate Exporter JSON Changes

on:
  pull_request:
    paths:
      - '**/exporter*.json'

jobs:
  validate_exporter_json:
    runs-on: ubuntu-latest

    steps:
      - name: Check out code
        uses: actions/checkout@v2

      - name: Fetch Base and Head References
        run: |
          git fetch origin ${{ github.base_ref }}:${{ github.base_ref }}
          git fetch origin ${{ github.head_ref }}:${{ github.head_ref }}

      - name: Validate JSON Changes
        run: |
          changed_files=$(git diff --name-only ${{ github.base_ref }} ${{ github.head_ref }} | grep 'exporter.*\.json$')

          if [ -z "$changed_files" ]; then
            echo "No exporter JSON files have changed."
            exit 0
          fi

          # Loop through each changed file
          for file in $changed_files; do
            # Check if the file exists in both branches
            if git cat-file -e origin/${{ github.base_ref }}:$file 2>/dev/null && git cat-file -e origin/${{ github.head_ref }}:$file 2>/dev/null; then
              # Fetch the base and head versions of the file
              base_file=$(git show origin/${{ github.base_ref }}:$file)
              head_file=$(git show origin/${{ github.head_ref }}:$file)

              # Compare the JSON keys
              base_keys=$(echo "$base_file" | jq -r 'paths | map(tostring) | join(".")' | sed 's/\./\\./g')
              head_keys=$(echo "$head_file" | jq -r 'paths | map(tostring) | join(".")' | sed 's/\./\\./g')

              # Check for removed keys
              removed_keys=$(comm -23 <(echo "$base_keys" | sort) <(echo "$head_keys" | sort))

              if [ -n "$removed_keys" ]; then
                echo "Backward incompatibility change detected in $file. The following keys were removed:"
                echo "$removed_keys"
                exit 1
              fi

            # Check for changed values
            for key in $base_keys; do
              base_value=$(echo "$base_file" | jq -r --arg key "$key" '.[$key]')
              head_value=$(echo "$head_file" | jq -r --arg key "$key" '.[$key]')

                if [ "$base_value" != "$head_value" ]; then
                  echo "Backward incompatibility change detected in $file. The value of key '$key' was changed from '$base_value' to '$head_value'."
                  exit 1
                fi
              done
            else
              echo "Skipping file $file as it exists in one branch but not the other."
            fi
          done

          echo "All exporter JSON files have only additions. No backward incompatibility changes detected."
        shell: bash