Set branch env.

diff --git a/.github/workflows/docker-build-master.yaml b/.github/workflows/docker-build-master.yaml
index d94037bb62702c60debd9d782f364975102c21fb..de3985375dd3a42c9e785e9ba527eb5b6fa1e647 100644 (file)
--- a/.github/workflows/docker-build-master.yaml
+++ b/.github/workflows/docker-build-master.yaml
@@ -13,6 +13,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+      - name: Set branch env.
+        run: echo "BRANCH=${GITHUB_REF##*/}" >> $GITHUB_ENV
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
       - name: Set up Docker Buildx
@@ -30,4 +32,6 @@ jobs:
           file: ./docker/Dockerfile
           platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm64,linux/arm/v7
           push: true
-          tags: registry.nova.do/shairport-sync:unstable-${GITHUB_REF##*/} # ${GITHUB_REF##*/} gets the current branch name.
\ No newline at end of file
+          tags: registry.nova.do/shairport-sync:unstable-${{ env.BRANCH }}
+          build-args: |
+            BRANCH=${{ env.BRANCH }}
\ No newline at end of file