ci: speedup docker builds with cache reuse

.github/workflows/release.yaml

@@ -31,30 +31,51 @@ jobs:
           fetch-depth: 0
 
       - name: Calculate new version with autotag
+        id: autotag
         run: |
           curl -sL https://git.io/autotag-install | sh -s -- -b "${RUNNER_TEMP}/bin"
           set -x
           version=$(${RUNNER_TEMP}/bin/autotag -n)
           echo "version=$version" >> $GITHUB_ENV
+          echo "version=${version}" >> $GITHUB_OUTPUT
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3
 
-      - name: Release
+      - name: Build and push
+        uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ghcr.io/planetscale/k8s-node-tagger:v${{ steps.autotag.outputs.version }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Create Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          set -eou pipefail
-          set -x
+          gh release create "v${version}" \
+            --target main \
+            --title "v${version}" \
+            --generate-notes
 
-          image="ghcr.io/planetscale/k8s-node-tagger:v${version}"
+      # - name: Release
+      #   run: |
+      #     set -eou pipefail
+      #     set -x
 
-          git reset --hard && git clean -ffdx && git pull
+      #     image="ghcr.io/planetscale/k8s-node-tagger:v${version}"
 
-          docker buildx build \
-            -t "$image" \
-            --platform linux/amd64,linux/arm64 \
-            --push \
-            .
+      #     git reset --hard && git clean -ffdx && git pull
 
-          gh release create "v${version}" --target main --title "v${version}" --generate-notes
-        env:
-          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+      #     docker buildx build \
+      #       -t "$image" \
+      #       --platform linux/amd64,linux/arm64 \
+      #       --push \
+      #       .
+
+      #     gh release create "v${version}" --target main --title "v${version}" --generate-notes
+      #   env:
+      #     GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}

Dockerfile

@@ -1,17 +1,24 @@
 # syntax=docker/dockerfile:1.9
-FROM --platform=$BUILDPLATFORM pscale.dev/wolfi-prod/go:1.23 AS builder
+FROM --platform=$BUILDPLATFORM pscale.dev/wolfi-prod/go:1.23 AS deps
+
+ENV GOMODCACHE=/go/pkg/mod
+
+WORKDIR /work
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+FROM deps AS builder
 ARG TARGETOS
 ARG TARGETARCH
 
-WORKDIR /work
-COPY . /work
+COPY . .
 
 ENV CGO_ENABLED=0
-RUN GOOS=${TARGETOS} GOOARCH=${TARGETARCH} go build -trimpath -v -o ./k8s-node-tagger .
+RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -trimpath -v -o ./k8s-node-tagger .
 
-# -- runtime image: --
+# --- runtime image ----
 FROM pscale.dev/wolfi-prod/static:latest
-
 COPY --from=builder /work/k8s-node-tagger /k8s-node-tagger
-
-ENTRYPOINT ["/k8s-node-tagger"]
+ENTRYPOINT ["/k8s-node-tagger"]