dockerfile_version_check.yaml

name: Dockerfile Version Check

on:
  pull_request:
    paths:
      - "docker/Dockerfile.*"
      - "docker/docker-compose.yaml"

jobs:
  check-docker-version:
    runs-on: ubuntu-latest

    steps:
      # Checkout the code
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          sparse-checkout: docker/

      # Fetch base branch (e.g., 'main') for comparison
      - name: Fetch base branch for comparison
        run: |
          git fetch origin +refs/heads/${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}

      # Define a function to check version increment for a given image_name
      - name: Check Dockerfile changes and version increment for each image_name
        run: |
          # List the image_names and their corresponding Dockerfiles
          cd docker/
          declare -A image_name_to_dockerfile
          image_name_to_dockerfile=( 
            ["isaac-sim_ros-humble"]="Dockerfile.isaac-ros"
            ["airstack-dev"]="Dockerfile.airstack-dev"
            # Add more mappings here
          )

          # Compare the current branch with the base branch
          changes=$(git diff --name-only origin/${{ github.base_ref }}...HEAD)

          # Loop through each image_name and its Dockerfile
          for image_name in "${!image_name_to_dockerfile[@]}"; do
            dockerfile="${image_name_to_dockerfile[$image_name]}"

            # If the Dockerfile for this image_name has been changed
            if echo "$changes" | grep -q "$dockerfile"; then
              echo "Dockerfile for $image_name has changed."

              # Check if the docker-compose.yaml contains an image version for this image_name (vX.Y.Z)
              if grep -qE "image: .*/$image_name:.*v[0-9]+\.[0-9]+\.[0-9]+" docker-compose.yaml; then
                # Extract the full version (vX.Y.Z)
                version_on_main=$(git show origin/${{ github.base_ref }}:docker/docker-compose.yaml | grep -oP "image: .*/$image_name:v\K[0-9]+\.[0-9]+\.[0-9]+")
                echo "version_on_main=$version_on_main"

                # Split current version into major, minor, patch
                IFS='.' read -r current_major current_minor current_patch <<< "$version_on_main"

                # Check if the image version for this image_name has been incremented in this PR
                version_this_branch=$(grep -oP "image: .*/$image_name:v\K[0-9]+\.[0-9]+\.[0-9]+" docker-compose.yaml)

                if [ -z "$version_this_branch" ]; then
                  echo "::error::Dockerfile for $image_name was modified but image version in docker-compose.yaml was not updated."
                  exit 1
                fi

                echo "version_this_branch=$version_this_branch"

                # Split new version into major, minor, patch
                IFS='.' read -r new_major new_minor new_patch <<< "$version_this_branch"

                # Check if the new version is higher than the current one
                if [ "$new_major" -gt "$current_major" ] || \
                  ([ "$new_major" -eq "$current_major" ] && [ "$new_minor" -gt "$current_minor" ]) || \
                  ([ "$new_major" -eq "$current_major" ] && [ "$new_minor" -eq "$current_minor" ] && [ "$new_patch" -gt "$current_patch" ]); then
                  echo "Image version for $image_name has been incremented in docker-compose.yaml."
                else
                  echo "::error::Dockerfile for $image_name was modified but the image version in docker-compose.yaml was not correctly incremented."
                  exit 1
                fi
              else
                echo "::error::No valid image version (vX.Y.Z) found in docker-compose.yaml for $image_name."
                exit 1
              fi
            else
              echo "No changes to Dockerfile for $image_name."
            fi
          done