name: Cache Files
desciption: Compress and cache files for later

inputs:
  key:
    required: true
    type: string
    default: default
  pattern:
    required: true
    type: string

runs:
  using: composite
  container:
    image: alpine
    volumes:
      - /cache:/cache
  steps:
    - run: |
        tar -czf "archive.tar.gz" ${{ inputs.pattern }}
        mkdir -p "/cache/$GITHUB_REPOSITORY/${{ inputs.key }}"
        ARCHIVE="/cache/$GITHUB_REPOSITORY/${{ inputs.key }}/archive.tar.gz"
        [[ ! -f "$ARCHIVE" || "$(md5sum "$ARCHIVE")" != "$(md5sum archive.tar.gz)" ]] && mv archive.tar.gz "$ARCHIVE"