ci: Inject version at build time

Author: wille

.github/workflows/release.yml

@@ -33,6 +33,16 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Get version
+        id: get_version
+        run: |
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+          else
+            VERSION=dev-${GITHUB_SHA::8}
+          fi
+          echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
+
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
@@ -49,6 +59,8 @@ jobs:
           platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            VERSION=${{ steps.get_version.outputs.VERSION }}
 
       - name: Generate artifact attestation
         uses: actions/attest-build-provenance@v2

Dockerfile

@@ -4,6 +4,7 @@ LABEL org.opencontainers.image.source=https://github.com/wille/haprovider
 
 ARG TARGETOS
 ARG TARGETARCH
+ARG VERSION=dev
 
 WORKDIR /haprovider
 
@@ -13,7 +14,7 @@ RUN go mod download
 
 COPY . .
 
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o haprovider cmd/haprovider/main.go
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -ldflags "-X github.com/wille/haprovider/internal.Version=${VERSION}" -o haprovider cmd/haprovider/main.go
 
 FROM gcr.io/distroless/static:nonroot
 WORKDIR /

internal/version.go

@@ -1,3 +1,3 @@
 package internal
 
-const Version string = "1.0.0"
+var Version string = "dev"