build: build & publish with ko

.github/workflows/build.yml

@@ -2,65 +2,34 @@ name: build-containers
 on:
   push:
     branches:
-      - master
+      - main
+
+permissions:
+  contents: read
+  packages: write
+
 jobs:
-  vultr-exporter:
+  build-publish:
     name: updown-exporter
     runs-on: ubuntu-latest
-    env:
-      REPO: dazwilkin/updown-exporter
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Setup
-        uses: docker/setup-buildx-action@v3
-      - name: Login
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: stable
+
+      - uses: ko-build/[email protected]
+
+      - name: Log in to GHCR
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GHCR }}
-      - name: Get kernel version
-        run: echo "VERSION=$(uname --kernel-release)" >> ${GITHUB_ENV}
-      - name: Exporter
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          file: ./Dockerfile
-          build-args: |
-            TOKEN=${{ secrets.GHCR }}
-            VERSION=${{ env.VERSION }}
-            COMMIT=${{ github.sha }}
-          tags: ghcr.io/${{ env.REPO }}:${{ github.sha }}
-          push: true
-      # - name: Cosign installer
-      #   uses: sigstore/cosign-installer@main
-      # - name: Write signing key to disk (only needed for `cosign sign --key`)
-      #   run: echo "${{ secrets.SIGNING }}" > ./cosign.key
-      # - name: Sign container image
-      #   run: |
-      #     cosign sign \
-      #     --key=./cosign.key \
-      #     --annotations="repo=${{ github.repository }}" \
-      #     --annotations="workflow=${{ github.workflow }}" \
-      #     --annotations="commit=${{ github.sha }}" \
-      #     --annotations="version=${{ env.VERSION }}" \
-      #     ghcr.io/${{ env.REPO }}:${{ github.sha }}
-      #   env:
-      #     COSIGN_PASSWORD: ""          
-      - name: Revise occurrences of the image
-        run: |
-          git config --local user.email "[email protected]"
-          git config --local user.name "GitHub Actions"
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
-          for FILENAME in "./README.md"
-          do
-            echo "Replacing: ${REPO}"
-            sed \
-            --in-place \
-            "s|${{ env.REPO }}:[0-9a-f]\{40\}|${{ env.REPO }}:${{ github.sha }}|g" \
-            ${FILENAME}
-            git add ${FILENAME}
-          done
-          git commit --message "GitHub Actions update image references"
-          git push origin master
+      - run: |
+          ko build --sbom=none --bare .
+        env:
+          KO_DOCKER_REPO: ghcr.io/${{ github.repository }}

.ko.yaml

@@ -0,0 +1,10 @@
+builds:
+- id: updown-exporter
+  main: .
+  ldflags:
+  - -s -w
+  - -extldflags "-static"
+
+defaultPlatforms:
+- linux/arm64
+- linux/amd64