build_brh_notebook_image.yml

name: Build and push BRH notebook image

on:
  push:
    paths:
    - BRH-notebooks/*/**
    - .github/workflows/build_brh_notebook_image.yml

jobs:
  push-image:
    runs-on: ubuntu-latest
    steps:
      - name: Maximize build space
        uses: easimon/maximize-build-space@master
        with:
          root-reserve-mb: 30000
          swap-size-mb: 1024
          remove-dotnet: 'true'
          remove-android: 'true'
          remove-haskell: 'true'

      - name: clean
        run: sudo apt clean

      - name: Extract branch name
        shell: bash
        run: echo "branch=$(echo $(echo ${GITHUB_REF#refs/heads/} | tr  / _))" >> $GITHUB_OUTPUT
        id: extract_branch

      - name: Checkout repo
        uses: actions/checkout@v2

      - name: Get changed files
        id: get_changed_files
        uses: jitterbit/get-changed-files@v1
        with:
          format: 'json'

      - name: Determine image to build
        id: parse_image
        shell: python
        env:
          CHANGES: ${{ steps.get_changed_files.outputs.added_modified }}
        run: |
          import os, json, re

          notebook_dir = "BRH-notebooks"
          changed_brh_notebook_files = json.loads(os.environ['CHANGES'])
          print(f"Changed files {changed_brh_notebook_files}")

          # build an image for every subdir of BRH-notebooks with a changed file
          subdirs = list(
            filter(
              lambda d: os.path.isdir(f"{os.environ['GITHUB_WORKSPACE']}/{notebook_dir}/{d}"),
              os.listdir(notebook_dir)
            )
          )

          print(f"Scanning subdirs for changed files: {subdirs}")

          buildable_images = list(
            filter(
              lambda subdir: any(
                changed_file.startswith(f"{notebook_dir}/{subdir}")
                for changed_file in changed_brh_notebook_files
              ),
              subdirs
            )
          )

          if not len(buildable_images):
            print(f"None of {changed_brh_notebook_files} triggers a build for any of {subdirs}. Done.")
            exit(0)
          elif len(buildable_images) > 1:
            print("Found multiple notebook directories with changes: {buildable_images}")
            print("Only one image can be built at a time. Exiting.")
            exit(1)

          build_target = buildable_images[0]
          print(f"Will trigger build for: {build_target}")
          with open(os.environ['GITHUB_OUTPUT'], 'a') as fh:
            print(f'build_target={build_target}', file=fh)

      - if: ${{ steps.parse_image.outputs.build_target }}
        name: Sanitize image name
        id: sanitize_name
        run: |
          IMAGE_NAME=$( sed 's/[^[:alnum:]]/_/g' <<< ${{ steps.parse_image.outputs.build_target }} );
          echo "image_name=$IMAGE_NAME" >> $GITHUB_OUTPUT

      - if: ${{ steps.parse_image.outputs.build_target }}
        name: Build image
        id: build-image
        uses: redhat-actions/buildah-build@v2
        with:
          image: brh-notebooks
          tags:
            ${{ steps.sanitize_name.outputs.image_name }}__${{ steps.extract_branch.outputs.branch }}
            ${{ steps.sanitize_name.outputs.image_name }}__${{ github.sha }}
            ${{ steps.sanitize_name.outputs.image_name }}__latest
          dockerfiles: ./BRH-notebooks/Dockerfile
          build-args:
            NOTEBOOK_DIR=BRH-notebooks/${{ steps.parse_image.outputs.build_target }}

      - if: ${{ steps.parse_image.outputs.build_target }}
        name: Push To quay.io
        id: push-to-quay
        uses: redhat-actions/push-to-registry@v2
        with:
          image: ${{ steps.build-image.outputs.image }}
          tags: ${{ steps.build-image.outputs.tags }}
          registry: quay.io/cdis
          username: ${{ secrets.QUAY_SERVICE_ACCOUNT_USER }}
          password: ${{ secrets.QUAY_SERVICE_ACCOUNT_PASSWORD }}