docker: pass in build-args, add $NOW

.github/workflows/docker.yml

@@ -20,6 +20,11 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v3
+      -
+        name: Set environment variables
+        run: |
+          echo "BRANCH=${GITHUB_REF#refs/heads/}" >> $GITHUB_ENV
+          echo "NOW=$(date +'%Y-%m-%dT%H:%M:%S')" >> $GITHUB_ENV
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v2
@@ -29,6 +34,7 @@ jobs:
       -
         name: Login to Docker Hub
         uses: docker/login-action@v2
+        if: ${{ secrets.DOCKERHUB_USERNAME && secrets.DOCKERHUB_TOKEN }}
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
@@ -44,8 +50,12 @@ jobs:
         uses: docker/build-push-action@v4
         with:
           context: .
-          platforms: linux/amd64,linux/arm64 # ,linux/arm/v7
           push: true
+          build-args: |
+            COMMIT=${{ github.sha }}
+            BRANCH=${{ env.BRANCH }}
+            NOW=${{ env.NOW }}
+          platforms: linux/amd64,linux/arm64 # ,linux/arm/v7
           tags: |
             voglerr/free-games-claimer:latest
             ghcr.io/vogler/free-games-claimer:latest

Dockerfile

@@ -60,19 +60,23 @@ COPY . .
 RUN dos2unix *.sh && chmod +x *.sh
 COPY docker-entrypoint.sh /usr/local/bin/
 
+ARG COMMIT=""
+ARG BRANCH=""
+ARG NOW=""
+ENV COMMIT=${COMMIT}
+ENV BRANCH=${BRANCH}
+ENV NOW=${NOW}
+
 LABEL org.opencontainers.image.title="free-games-claimer" \
       org.opencontainers.image.name="free-games-claimer" \
       org.opencontainers.image.description="Automatically claims free games on the Epic Games Store, Amazon Prime Gaming and GOG" \
       org.opencontainers.image.url="https://github.com/vogler/free-games-claimer" \
       org.opencontainers.image.source="https://github.com/vogler/free-games-claimer" \
-      org.opencontainers.image.revision=${COMMIT_SHA} \
+      org.opencontainers.image.revision=${COMMIT} \
       org.opencontainers.image.ref.name=${BRANCH} \
       org.opencontainers.image.base.name="ubuntu:jammy" \
       org.opencontainers.image.version="latest"
 
-ENV COMMIT_SHA=${COMMIT_SHA}
-ENV BRANCH=${BRANCH}
-
 # Configure VNC via environment variables:
 ENV VNC_PORT 5900
 ENV NOVNC_PORT 6080

docker-entrypoint.sh

@@ -2,8 +2,9 @@
 
 set -eo pipefail # exit on error, error on any fail in pipe (not just last cmd); add -x to print each cmd; see gist bash_strict_mode.md
 
-echo "Version: https://github.com/vogler/free-games-claimer/tree/${COMMIT_SHA}"
+echo "Version: https://github.com/vogler/free-games-claimer/tree/${COMMIT}"
 [ ! -z $BRANCH ] && [ $BRANCH != "main" ] && echo "Branch: ${BRANCH}"
+echo "Build: $NOW"
 
 # Remove chromium profile lock.
 # When running in docker and then killing it, on the next run chromium displayed a dialog to unlock the profile which made the script time out.