build: inject version into forego binary

mirroring what's being done with docker-gen

Author: buchdag

.github/workflows/build-publish.yml

@@ -70,6 +70,7 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
+          build-args: FOREGO_VERSION=${{ steps.forego_version.outputs.VERSION }}
           platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/ppc64le,linux/s390x
           file: Dockerfile.${{ matrix.base }}
           sbom: true

Dockerfile.alpine

@@ -1,9 +1,11 @@
+ARG FOREGO_VERSION=main
+
 # Build forego
 FROM --platform=$BUILDPLATFORM golang:1.21.5-alpine as go-builder
 
 ENV CGO_ENABLED=0
 
-ARG TARGETOS TARGETARCH TARGETVARIANT
+ARG FOREGO_VERSION TARGETOS TARGETARCH TARGETVARIANT
 ENV GOOS=$TARGETOS GOARCH=$TARGETARCH VARIANT=$TARGETVARIANT
 
 RUN apk add --no-cache musl-dev
@@ -21,11 +23,14 @@ RUN set -eu; \
 		*) [ -z "$VARIANT" ] ;; \
 	esac; \
 	go env | grep -E 'OS=|ARCH=|ARM=|AMD64='; \
-	go build -o forego .; \
+	go build -ldflags "-X main.buildVersion=${FOREGO_VERSION}" -o forego .; \
 	go clean -cache
 
 FROM --platform=$TARGETPLATFORM alpine:3.19.0
 
+ARG FOREGO_VERSION
+ENV FOREGO_VERSION=${FOREGO_VERSION}
+
 RUN apk add --no-cache bash
 
 # Install Forego

Dockerfile.debian

@@ -1,9 +1,11 @@
+ARG FOREGO_VERSION=main
+
 # Build forego
 FROM --platform=$BUILDPLATFORM golang:1.21.5 as go-builder
 
 ENV CGO_ENABLED=0
 
-ARG TARGETOS TARGETARCH TARGETVARIANT
+ARG FOREGO_VERSION TARGETOS TARGETARCH TARGETVARIANT
 ENV GOOS=$TARGETOS GOARCH=$TARGETARCH VARIANT=$TARGETVARIANT
 
 WORKDIR /build
@@ -19,11 +21,14 @@ RUN set -eu; \
 		*) [ -z "$VARIANT" ] ;; \
 	esac; \
 	go env | grep -E 'OS=|ARCH=|ARM=|AMD64='; \
-	go build -o forego .; \
+	go build -ldflags "-X main.buildVersion=${FOREGO_VERSION}" -o forego .; \
 	go clean -cache
 
 FROM --platform=$TARGETPLATFORM debian:12.4-slim
 
+ARG FOREGO_VERSION
+ENV FOREGO_VERSION=${FOREGO_VERSION}
+
 # Install Forego
 COPY --from=go-builder /build/forego /usr/local/bin/forego
 

Makefile

@@ -1,6 +1,9 @@
 BIN = forego
 SRC = $(shell find . -name '*.go')
 
+TAG:=`git describe --tags`
+LDFLAGS:=-X main.buildVersion=$(TAG)
+
 .PHONY: all build clean lint test
 
 all: build
@@ -20,4 +23,4 @@ test: lint get-deps build
 	go test -v -race -cover ./...
 
 $(BIN): $(SRC)
-	go build -o $@
+	go build -ldflags "$(LDFLAGS)" -o $@