build: Support building new revisions for tags

.github/ci/Dockerfile

@@ -31,10 +31,11 @@ FROM build as deb_make
 ARG GIT_VERSION
 ARG BUILD_TYPE="generic"
 ENV DEB_BUILD_PROFILES="$BUILD_TYPE"
+ARG DEB_REVISION="1"
 
 RUN apt-get build-dep -y $PWD
 RUN . /etc/os-release && \
-  export RELEASE_SUFFIX="$VERSION_CODENAME" && \
+  export RELEASE_SUFFIX="$VERSION_CODENAME-$DEB_REVISION" && \
   dpkg-buildpackage -us -uc -b
 
 RUN mkdir -p /deb && mv ../*.deb /deb/

.github/workflows/build_revision.yaml

@@ -0,0 +1,104 @@
+name: "Build package revisions for latest release"
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "release to revision"
+        required: false
+        default: ''
+      deb_revision:
+        description: "Revision to use for the debian packages"
+        required: false
+        default: ''
+
+jobs:
+  vars:
+    runs-on: ubuntu-latest
+    outputs:
+      tag: ${{ steps.get_tag.outputs.tag }}
+      revision: ${{ steps.get_revision.outputs.revision }}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+        submodules: recursive
+    - name: Determine latest tag
+      id: get_tag
+      run: |
+        set -e
+        tag="${{ github.event.inputs.tag }}"
+        if [[ -z "$tag" ]]; then
+          tag=$(git describe --tags --abbrev=0)
+        fi
+        echo "Set tag to $tag"
+        echo "tag=$tag" >> "$GITHUB_OUTPUT"
+        echo "GIT_VERSION=$tag" >> "$GITHUB_ENV"
+    - name: Determine latest revision
+      id: get_revision
+      run: |
+        set -e
+        revision="${{ github.event.inputs.deb_revision }}"
+        if [[ -z "$revision" ]]; then
+          current=$(curl -s https://api.github.com/repos/${GITHUB_REPOSITORY}/releases/tags/${GIT_VERSION} | jq -r ".assets[].name" | grep "camera-streamer-raspi.*_armhf.deb" | cut -d "_" -f 2 | cut -d "-" -f 2 | sort -nr | head -n1)
+          echo "Found current revision $current"
+          revision=$(expr $current + 1)
+        fi
+        echo "Set revision to $revision"
+        echo "revision=$revision" >> "$GITHUB_OUTPUT"
+
+  build:
+    runs-on: ubuntu-latest
+    needs: vars
+    permissions:
+      contents: write
+    strategy:
+      matrix:
+        debian_version: [bullseye]
+        docker_arch: [amd64, arm32v7, arm64v8]
+        build_type: [generic, raspi]
+        exclude:
+          - docker_arch: amd64
+            build_type: raspi
+          - debian_version: buster
+            build_type: raspi
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+        submodules: recursive
+        ref: ${{ needs.vars.outputs.tag }}
+    - name: Set GIT_VERSION
+      run: echo "GIT_VERSION=$(git describe --tags)" >> $GITHUB_ENV
+    - name: Set DEB_REVISION
+      shell: bash
+      run: |
+        revision="${{ needs.vars.outputs.revision }}"
+        if [[ -n "$revision" ]]; then
+          echo "DEB_REVISION=${revision}" >> $GITHUB_ENV
+        else
+          echo "DEB_REVISION=1" >> $GITHUB_ENV
+        fi
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v2
+    - name: Build Dockerfile
+      run: docker build --target deb_make --tag deb_make --file .github/ci/Dockerfile --build-arg GIT_VERSION --build-arg DEB_REVISION --build-arg DOCKER_ARCH --build-arg DEBIAN_VERSION --build-arg BUILD_TYPE .
+      env:
+        DEBIAN_VERSION: ${{ matrix.debian_version }}
+        DOCKER_ARCH: ${{ matrix.docker_arch }}/
+        BUILD_TYPE: ${{ matrix.build_type }}
+    - name: Create container
+      run: docker create --name deb_make deb_make
+    - name: Copy files
+      run: 'docker cp deb_make:/deb/. deb/'
+    - name: 'Release debian files'
+      uses: ncipollo/release-action@v1
+      with:
+        tag: "${{ env.GIT_VERSION }}"
+        artifacts: "deb/*.deb"
+        allowUpdates: true
+        omitBodyDuringUpdate: true
+        omitNameDuringUpdate: true
+        omitPrereleaseDuringUpdate: true