build(docker): Fix version details in docker image

As part of golangci#1383, multi-arch docker build was supported. However,
ldflags for version details was missing.

This commit is to add -ldflags
as part of Docker build.

Fixes golangci#1468

Signed-off-by: Tam Mach <sayboras@yahoo.com>

.github/workflows/tag.yml

@@ -31,8 +31,12 @@ jobs:
         run: |
             TAG=${GITHUB_REF#refs/tags/}
             MAJOR=${TAG%.*}
+            SHORT_COMMIT=${GITHUB_SHA::8}
+            DATE=$(date '+%Y-%m-%dT%H:%M:%SZ')
             echo ::set-output name=tag_name::${TAG}
             echo ::set-output name=major_tag::${MAJOR}
+            echo ::set-output name=short_commit::${SHORT_COMMIT}
+            echo ::set-output name=date::${DATE}
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
       - name: Set up Docker Buildx
@@ -45,6 +49,10 @@ jobs:
           file: build/Dockerfile
           platforms: linux/amd64,linux/arm64
           push: true
+          build-args: |
+            VERSION=${{ steps.prepare.outputs.tag_name }}
+            SHORT_COMMIT=${{ steps.prepare.outputs.short_commit }}
+            DATE=${{ steps.prepare.outputs.date }}
           tags: |
             golangci/golangci-lint:${{ steps.prepare.outputs.tag_name }}
             golangci/golangci-lint:${{ steps.prepare.outputs.major_tag }}
@@ -56,6 +64,10 @@ jobs:
           context: .
           file: build/Dockerfile.alpine
           platforms: linux/amd64,linux/arm64
+          build-args: |
+            VERSION=${{ steps.prepare.outputs.tag_name }}
+            SHORT_COMMIT=${{ steps.prepare.outputs.short_commit }}
+            DATE=${{ steps.prepare.outputs.date }}
           push: true
           tags: |
             golangci/golangci-lint:${{ steps.prepare.outputs.tag_name }}-alpine

build/Dockerfile

@@ -1,9 +1,13 @@
 # stage 1 building the code
 FROM golang:1.15 as builder
 
+ARG VERSION
+ARG SHORT_COMMIT
+ARG DATE
+
 COPY / /golangci
 WORKDIR /golangci
-RUN go build -o golangci-lint ./cmd/golangci-lint/main.go
+RUN go build -ldflags "-s -w -X main.version=$VERSION -X main.commit=$SHORT_COMMIT -X main.date=$DATE" -o golangci-lint ./cmd/golangci-lint/main.go
 
 # stage 2
 FROM golang:1.15

build/Dockerfile.alpine

@@ -1,9 +1,13 @@
 # stage 1 building the code
 FROM golang:1.15-alpine as builder
 
+ARG VERSION
+ARG SHORT_COMMIT
+ARG DATE
+
 COPY / /golangci
 WORKDIR /golangci
-RUN CGO_ENABLED=0 go build -o golangci-lint ./cmd/golangci-lint/main.go
+RUN go build -ldflags "-s -w -X main.version=$VERSION -X main.commit=$SHORT_COMMIT -X main.date=$DATE" -o golangci-lint ./cmd/golangci-lint/main.go
 
 # stage 2
 FROM golang:1.15-alpine