Merge pull request #405 from Kegbot/mikey/tag-builds

tag docker builds with build information

.github/workflows/docker.yml

@@ -15,6 +15,18 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v2
+      -
+        name: Prepare
+        id: prepare
+        run: |
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            TAG=${GITHUB_REF#refs/tags/}
+            echo ::set-output name=tag_name::${TAG}
+            echo ::set-output name=version::${TAG%-*}
+          else
+            echo ::set-output name=version::snapshot
+          fi
+          echo ::set-output name=build_date::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
       -
         name: Set up Docker Buildx
         id: buildx
@@ -29,6 +41,9 @@ jobs:
         run: |
           docker buildx build \
             --platform linux/amd64,linux/arm/v7 \
+            --build-arg "BUILD_DATE=${{ steps.prepare.outputs.build_date }}" \
+            --build-arg "GIT_SHORT_SHA=${GITHUB_SHA::8}" \
+            --build-arg "VERSION=${{ steps.prepare.outputs.version }}" \
             -t current \
             --load .
       -

Dockerfile

@@ -31,6 +31,13 @@ ADD setup.py ./
 RUN python setup.py develop
 RUN bin/kegbot collectstatic -v 0 --noinput
 
+ARG GIT_SHORT_SHA="unknown"
+ARG VERSION="unknown"
+ARG BUILD_DATE="unknown"
+RUN echo "GIT_SHORT_SHA=${GIT_SHORT_SHA}" > /etc/kegbot-version
+RUN echo "VERSION=${VERSION}" >> /etc/kegbot-version
+RUN echo "BUILD_DATE=${BUILD_DATE}" >> /etc/kegbot-version
+
 VOLUME  ["/kegbot-data"]
 
 EXPOSE 8000