feat: add support for --version

Author: marcusramberg

.github/workflows/image.yml

@@ -17,8 +17,12 @@ jobs:
     steps:
       - name: Check out code
         uses: actions/checkout@v5
+        with:
+          fetch-tags: true
       - id: lc_repo
         run: python3 -c'print("out=${{github.repository}}".lower())' >> "$GITHUB_OUTPUT"
+      - id: git_version
+        run: echo "out=$(git describe --tags --always)" >> "$GITHUB_OUTPUT"
       - name: Log in to the Container registry
         uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1
         with:
@@ -43,6 +47,7 @@ jobs:
           platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          build-args: "HF_VERSION=${{ steps.git_version.outputs.out }}"
       - name: Generate artifact attestation
         uses: actions/attest-build-provenance@v2
         with:

.github/workflows/release.yml

@@ -38,10 +38,12 @@ jobs:
 
       - name: Check out code
         uses: actions/checkout@v5
+        with:
+          fetch-tags: true
 
       - name: Build
         run: |
-          env GOOS=${{ matrix.goos }} GOARCH=${{ matrix.goarch }} go build -v -o helmfile-nix-${{ matrix.os }}-${{ matrix.arch }}
+          env GOOS=${{ matrix.goos }} GOARCH=${{ matrix.goarch }} go build -v -ldflags="-X main.version=$(git describe --tags) -w -s" -o helmfile-nix-${{ matrix.os }}-${{ matrix.arch }}
 
       - name: Upload Release Asset
         uses: actions/upload-release-asset@v1

Dockerfile

@@ -3,14 +3,11 @@ FROM  golang:1.24.6-bullseye AS builder
 ARG BUILDPLATFORM
 ARG TARGETOS
 ARG TARGETARCH
+ARG HF_VERSION="docker-dev"
 
 WORKDIR /app/
 ADD . .
-RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -ldflags="-w -s" -o helmfile-nix .
-
-
-# Build the binary.
-RUN go build -mod=readonly -v -o helmfile-nix .
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -ldflags="-X main.version=${HF_VERSION} -w -s" -o helmfile-nix .
 
 
 FROM ghcr.io/remarkable/helmfile-nix/nix-alpine:main@sha256:67d8ff0355fe85bf9b52adfa4378d2dc253fba8af23cfdd721a970024e4f8ebd

default.nix

@@ -1,4 +1,5 @@
 {
+  version,
   pkgs ? (
     let
       inherit (builtins) fetchTree fromJSON readFile;
@@ -23,7 +24,8 @@ let
 in
 buildGoApplication {
   pname = "helmfile-nix";
-  version = "0.1";
+  version = version;
+  ldflags = "-X main.version=${version} -w -s";
   pwd = ./.;
   src = ./.;
   nativeBuildInputs = with pkgs; [

flake.nix

@@ -25,6 +25,7 @@
       {
         packages.default = pkgs.callPackage ./. {
           inherit (gomod2nix.legacyPackages.${system}) buildGoApplication;
+          version = self.shortRev or self.dirtyShortRev;
         };
         packages.devenv-up = self.devShells.${system}.default.config.procfileScript;
         packages.devenv-test = self.devShells.${system}.default.config.test;

main.go

@@ -21,6 +21,8 @@ import (
 //go:embed eval.nix
 var eval string
 
+var version = "dev"
+
 // List of temporary directories that need to be cleaned up after use.
 var cleanup []string
 
@@ -30,6 +32,7 @@ type Options struct {
 	Env            string   `short:"e" long:"environment" description:"Environment to deploy to" default:"dev"`
 	ShowTrace      []bool   `long:"show-trace" description:"Enable stacktraces"`
 	StateValuesSet []string `long:"state-values-set" description:"Set state values"`
+	Version        bool     `short:"v" long:"version" description:"Print version and exit"`
 }
 
 var (
@@ -51,6 +54,18 @@ func main() {
 		retcode = 1
 		return
 	}
+	if opts.Version {
+		fmt.Printf("helmfile-nix version %s\n", version)
+		cmd := exec.Command("helmfile", "--version")
+		cmd.Stderr = os.Stderr
+		cmd.Stdout = os.Stdout
+		callErr := cmd.Run()
+		if callErr != nil {
+			log.Println("Running helmfile failed: ", err)
+			retcode = 1
+		}
+		return
+	}
 
 	seen := false
 	for _, v := range args[1:] {