ci.yml

---
name: CI

on:  # yamllint disable-line rule:truthy
  push:
    branches:
      - main
      - develop
      - x-calib-nopeak-find
  pull_request:
    branches:
      - main
      - develop
    tags:
      - v*.*.*
  workflow_dispatch:

env:
  POETRY_VERSION: 1.8.3
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}


jobs:

  test:

    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version:
          - '3.9'
          - '3.10'
          - '3.11'
          - '3.12'

    steps:

      - name: Checkout the repository
        uses: actions/checkout@v4.1.7

      - name: Setup Python
        uses: actions/setup-python@v5.1.0
        with:
          python-version: ${{ matrix.python-version }}

      - name: Get the precise Python version
        run: echo "PYTHON_ID=$( python -VV | sha256sum | awk '{ print $1 }' )" >> "$GITHUB_ENV"

      - name: Load the cached Poetry installation
        id: cached-poetry
        uses: actions/cache@v4.0.2
        with:
          path: ~/.local
          key: poetry-${{ env.POETRY_VERSION }}-py_${{ env.PYTHON_ID}}-0

      - name: Install Poetry
        if: steps.cached-poetry.outputs.cache-hit != 'true'
        uses: snok/install-poetry@v1.3.4
        with:
          version: ${{ env.POETRY_VERSION }}
          virtualenvs-create: true
          virtualenvs-in-project: true

      - name: Load the cached dependencies
        id: cached-deps
        uses: actions/cache@v4.0.2
        with:
          path: .venv
          key: py${{ matrix.python-version }}-deps-${{ hashFiles('**/poetry.lock') }}

      - name: Install dependencies
        if: steps.cached-deps.outputs.cache-hit != 'true'
        run: poetry install --no-interaction

      - name: Run pre-commit
        run: >-
          if [[ $GITHUB_REF == refs/heads/main ]]; then
            SKIP=no-commit-to-branch poetry run pre-commit run --all-files
          elif [[ $GITHUB_REF == refs/heads/x-calib-nopeak-find ]]; then
            echo 'Skipping pre-commit.'
          else
            poetry run pre-commit run --all-files
          fi

      - name: Run tests
        env:
          COVERAGE_FILE: .coverage.${{ matrix.python-version }}
        run: >-
          if [[ $GITHUB_REF == refs/heads/x-calib-nopeak-find ]]; then
            echo 'Skipping tests.'
          else
            poetry run pytest --cov
          fi

      - name: Store the coverage report
        uses: actions/upload-artifact@v4.3.3
        if: github.ref != 'refs/heads/x-calib-nopeak-find'
        with:
          name: coverage-${{ matrix.python-version }}
          path: .coverage.${{ matrix.python-version }}

  coverage:

    runs-on: ubuntu-latest
    needs: test
    if: github.ref != 'refs/heads/x-calib-nopeak-find'
    permissions:
      pull-requests: write
      contents: write

    steps:

      - name: Checkout the repository
        uses: actions/checkout@v4.1.6

      - name: Retrieve the coverage reports
        id: download
        uses: actions/download-artifact@v4.1.7
        with:
          pattern: coverage-*
          merge-multiple: true

      - name: Process the coverage reports
        id: coverage_processing
        uses: py-cov-action/python-coverage-comment-action@v3.25
        with:
          COVERAGE_DATA_BRANCH: 'COVERAGE-REPORT'
          GITHUB_TOKEN: ${{ github.token }}
          MERGE_COVERAGE_FILES: true

      - name: Store the pull request coverage comment for later posting
        if: steps.coverage_processing.outputs.COMMENT_FILE_WRITTEN == 'true'
        uses: actions/upload-artifact@v4.3.3
        with:
          name: python-coverage-comment-action
          path: python-coverage-comment-action.txt

  build:

    runs-on: ubuntu-latest
    needs: test
    permissions:
      contents: read
      packages: write
      # This is used to complete the identity challenge
      # with sigstore/fulcio when running outside of PRs.
      id-token: write

    steps:

      - name: Checkout repository
        uses: actions/checkout@v4.1.7

      # Install the cosign tool except on PR
      # https://github.com/sigstore/cosign-installer
      - name: Install cosign
        if: github.event_name != 'pull_request'
        uses: sigstore/cosign-installer@v3.5.0
        with:
          cosign-release: 'v2.2.4'

      # Workaround: https://github.com/docker/build-push-action/issues/461
      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@v3.3.0

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3.2.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5.5.1
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          labels: |
            org.opencontainers.image.description=Web-based spectra harmonization tool
            org.opencontainers.image.licenses=MIT
            org.opencontainers.image.title=spectrastream
            org.opencontainers.image.url=https://github.com/h2020charisma/spectrastream/blob/main/README.md
            org.opencontainers.image.vendor=IDEAconsult
          tags: |
            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/x-calib-nopeak-find' }}
            type=raw,value=stable,enable=${{ github.ref == 'refs/heads/main' }}
            type=ref,event=branch
            type=ref,event=tag
            type=ref,event=pr

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v6.2.0
        with:
          cache-from: type=gha
          cache-to: type=gha,mode=max
          context: .
          labels: ${{ steps.meta.outputs.labels }}
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}

      # Sign the resulting Docker image digest except on PRs.
      # This will only write to the public Rekor transparency log when the Docker
      # repository is public to avoid leaking data.  If you would like to publish
      # transparency data even for private images, pass --force to cosign below.
      # https://github.com/sigstore/cosign
      - name: Sign the published Docker image
        if: github.event_name != 'pull_request'
        env:
          # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
          TAGS: ${{ steps.meta.outputs.tags }}
          DIGEST: ${{ steps.build-and-push.outputs.digest }}
        # This step uses the identity token to provision an ephemeral certificate
        # against the sigstore community Fulcio instance.
        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}