update container workflow (#509)

* update container workflow

* try again

.github/workflows/docker.yml

@@ -1,30 +1,47 @@
-name: Create and publish a package
+name: Push Docker Image to GitHub Packages
 on:
   push:
-    branches: ["master"]
+    branches:
+      - master
+      - container
+    tags:
+      - "*"
+  pull_request:
 env:
-  REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
+  IMAGE_NAME: python-snap7
+#
 jobs:
-  build-and-push-image:
-    runs-on: ubuntu-20.04
+  push:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+      #
     steps:
-    - name: Extract metadata (tags, labels) for Docker
-      id: meta
-      uses: docker/metadata-action@v5
-      with:
-        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      - uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
 
-    - name: Login to GitHub Container Registry
-      uses: docker/login-action@v3
-      with:
-        registry: ${{ env.REGISTRY }}
-        username: ${{ github.actor }}
-        password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Log in to registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
 
-    - name: Build container image
-      uses: docker/build-push-action@v5
-      with:
-        push: true
-        tags: ${{ steps.meta.outputs.tags }}
-        labels: ${{ steps.meta.outputs.labels }}
+      - name: Build and push container image
+        run: |
+          IMAGE_ID=$(echo ghcr.io/${{ github.repository }} | tr '[A-Z]' '[a-z]')
+          # Strip git ref prefix from version
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+          # Strip "v" prefix from tag name
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+          # when the branch is master, replace master with latest
+          [ "$VERSION" == "master" ] && VERSION=latest
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+          # Build and Publish container image
+          docker buildx build --push \
+          --tag $IMAGE_ID:$VERSION \
+          --platform linux/amd64,linux/arm/v7,linux/arm64 .

Dockerfile

@@ -1,10 +1,17 @@
-FROM ubuntu:20.04
+FROM ubuntu:24.04
 ENV DEBIAN_FRONTEND=noninteractive
+
+LABEL org.opencontainers.image.source=https://github.com/gijzelaerr/python-snap7
+LABEL org.opencontainers.image.description="The snap7 library is used to communicate with Siemens S7 PLCs. This is a Python wrapper for the snap7 library."
+LABEL org.opencontainers.image.licenses=MIT
+
 RUN apt update \
-    && apt install -y software-properties-common python3-pip \
+    && apt install -y software-properties-common python3-pip python3-venv \
     && add-apt-repository ppa:gijzelaar/snap7 \
     && apt update \
     && apt install -y libsnap7-dev libsnap7-1
 ADD . /code
-WORKDIR /code
-RUN pip3 install .
+WORKDIR /venv
+RUN python3 -m venv /venv
+RUN . /venv/bin/activate
+RUN /venv/bin/pip install /code