action.yaml

name: 'Find matching Dockerfile'

inputs:
  path:
    description: 'the path to search for the dockerfile'
    required: true

  version:
    description: 'The version of the service (e.g., 8.1.2)'
    required: true

outputs:
  dockerfile:
    description: 'Dockerfile name'
    value: ${{ steps.find-dockerfile.outputs.dockerfile }}

runs:
  using: composite
  steps:
    - name: Find Dockerfile
      id: find-dockerfile
      shell: bash
      env:
        PATH: ${{ inputs.path }}
        VERSION: ${{ inputs.version }}
      run: |
        find_dockerfile() {
          local search_path="$1"
          local version="$2"
          local current="$version"
        
          while [[ -n "$current" ]]; do
            local candidate="${search_path}/${current}.Dockerfile"
            if [[ -f "$candidate" ]]; then
              echo "$(basename "$candidate")"
              return 0
            fi
            
            # Remove last dot-segment (2.1.3 → 2.1 → 2)
            current="${current%.*}"
          
            # If nothing changed, break
            [[ "$current" == "$version" ]] && break
            version="$current"
          done
        
          # Fallback to default Dockerfile
          if [[ -f "${search_path}/Dockerfile" ]]; then
            echo "Dockerfile"
            return 0
          fi
        
          return 1
        }
        
        if [[ ! -d "$PATH" ]]; then
          echo "Error: Directory '$PATH' not found" >&2
          exit 1
        fi
        
        if DOCKERFILE_NAME=$(find_dockerfile "$PATH" "$VERSION"); then
          echo "dockerfile=${DOCKERFILE_NAME}" >> $GITHUB_OUTPUT
        else
          echo "Error: No matching Dockerfile found" >&2
          exit 1
        fi