build.yml

name: build

on:
  pull_request:
    branches: [ main ]

env:
  REGISTRY: docker.io
  IMAGE_NAME: ${{ github.repository }}

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  singularity:
    runs-on: ubuntu-latest
    container:
      image: quay.io/singularity/singularity:v3.11.5
    strategy:
      fail-fast: false
      matrix:
        recipe: ["Singularity"]
    steps:
      - name: Check out code for the container build
        uses: actions/checkout@v4

      - name: Continue if Singularity recipe exists
        run: |
          if [[ -f "${{ matrix.recipe }}" ]]; then
            echo "keepgoing=true" >> $GITHUB_ENV
          fi

      - name: Get branch name
        run: echo "BRANCH=${GITHUB_REF##*/}" >> $GITHUB_ENV

      - name: Build Singularity image 
        if: ${{ env.keepgoing == 'true' }}
        env:
          recipe: ${{ matrix.recipe }}
        run: |
         ls
         if [ -f "${{ matrix.recipe }}" ]; then
            sudo -E singularity build container.sif ${{ matrix.recipe }}
            tag=$(echo "${recipe/Singularity\./}")
            if [ "$tag" == "Singularity" ]; then
                tag=$BRANCH
            fi
            # Build the container and name by tag
            echo "Tag is $tag."
            echo "tag=$tag" >> $GITHUB_ENV
         else
           echo "${{ matrix.recipe }} is not found."
           echo "Present working directory: $PWD"
           ls
         fi