Print version and commit hash during start-up

Author: snorwin

.github/workflows/main.yml

@@ -0,0 +1,46 @@
+name: Publish (main)
+
+on:
+  push:
+    branches: main
+
+jobs:
+  image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to ghcr.io
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Modify Dockerfile
+        run: |
+          sed -i -e "s|%VERSION%|latest|g" Dockerfile
+      - name: Build and push
+        id: docker_build_master
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: ghcr.io/snorwin/haproxy:latest
+          platforms: linux/amd64
+          build-args: |
+            VERSION=main
+            HASH=${{ github.sha }}
+      - name: Prune ghcr images
+        uses: vlaurin/action-ghcr-prune@main
+        with:
+          token: ${{ secrets.PRUNE_IMAGE_TOKEN }}
+          container: ${{github.event.repository.name}}
+          dry-run: false
+          older-than: 7
+          keep-last: 2
+          untagged: true
+          keep-tags-regexes: (latest|alpine|2.5|2.5-alpine|2.5.5|2.5.5-alpine)

.github/workflows/publish.yml

@@ -1,8 +1,6 @@
-name: Publish
+name: Publish Release
 
 on:
-  push:
-    branches: main
   release:
     types:
       - published
@@ -36,4 +34,7 @@ jobs:
           context: .
           push: true
           tags: ghcr.io/snorwin/haproxy:${{ matrix.tag }}
-          platforms: linux/amd64
+          platforms: linux/amd64
+          build-args: |
+            VERSION=${{ github.event.release.tag_name }}
+            HASH=${{ github.sha }}

.github/workflows/test.yml

@@ -33,6 +33,9 @@ jobs:
           push: true
           tags: ghcr.io/snorwin/haproxy:${{ github.sha }}
           platforms: linux/amd64
+          build-args: |
+            VERSION=test
+            HASH=${{ github.sha }}
   test:
     needs: image
     runs-on: ubuntu-latest

Dockerfile

@@ -1,9 +1,11 @@
 FROM golang:1.17.8-alpine3.15 as builder
+ARG VERSION
+ARG HASH
 
 RUN mkdir /build
 WORKDIR /build
 COPY .. .
-RUN GO111MODULE=on CGO_ENABLED=0 GOOS=linux go build -a -o haproxy-reload-wrapper .
+RUN GO111MODULE=on CGO_ENABLED=0 GOOS=linux go build -ldflags "-X main.Version=${VERSION} -X main.Hash=${HASH}" -a -o haproxy-reload-wrapper .
 
 FROM docker.io/haproxy:%VERSION%
 

main.go

@@ -13,7 +13,14 @@ import (
 	"github.com/snorwin/haproxy-reload-wrapper/pkg/utils"
 )
 
+var (
+	Version = "v0.0.0"
+	Hash    = ""
+)
+
 func main() {
+	log.Notice(fmt.Sprintf("haproxy-reload-wrapper version is %s-%s", Version, Hash))
+
 	// fetch the absolut path of the haproxy executable
 	executable, err := utils.LookupExecutablePathAbs("haproxy")
 	if err != nil {