multiarch-build-workflow/.gitea/workflows/build.yaml

name: "Multiarch Build Action"
on:
  workflow_call:
    inputs:
      archs:
        required: true
        type: string
        default: "arm64, amd64"
      repository:
        required: true
        type: string
        default: ${{ gitea.repository }}
      ref_name:
        required: true
        type: string
        default: ${{ gitea.ref_name }}
      sha:
        required: true
        type: string
        default: ${{ gitea.sha }}
      registry_url:
        required: true
        type: string
        default: ${{ secrets.REGISTRY_URL }}
      registry_user:
        required: true
        type: string
        default: ${{ secrets.REGISTRY_USER }}
      registry_pw:
        required: true
        type: secret
        default: ${{ secrets.REGISTRY_PW }}
jobs:
  build-container:
    runs-on: buildah-latest
    steps:
      - name: Check out repository code
        uses: actions/checkout@v3
      - name: Split branch name
        env:
          REPO: ${{ inputs.repository }}
        id: split
        run: echo "::set-output name=repo_name::${REPO##*/}"
      - name: Build image
        id: build-image
        uses: redhat-actions/buildah-build@v2
        with:
          image: ${{ inputs.registry_user }}/${{ steps.split.outputs.repo_name }}
          tags: ${{ inputs.ref_name }} ${{ inputs.sha }}
          archs: ${{ inputs.archs }}
          containerfiles: |
            ./Containerfile
      - name: Push to registry
        id: push-to-registry
        uses: redhat-actions/push-to-registry@v2
        with:
          image: ${{ steps.build-image.outputs.image }}
          tags: ${{ steps.build-image.outputs.tags }}
          registry: ${{ inputs.registry_url }}
          username: ${{ inputs.registry_user }}
          password: ${{ inputs.registry_pw }}