Replace Version when building via Nix

cmd/root.go

@@ -17,12 +17,12 @@ import (
 	json "github.com/virtuald/go-ordered-json"
 )
 
-var version = "0.8.1"
+var Version = "development"
 
 // rootCmd represents the base command when called without any subcommands
 var rootCmd = &cobra.Command{
 	Use:     "gron",
-	Version: version,
+	Version: Version,
 	Short:   "Transform JSON or YAML into discrete assignments to make it greppable",
 	Long: `gron transforms JSON or YAML (from a file, URL, or stdin) into discrete assignments to make it easier to grep for what you want and see the absolute "path" to it.
 

cmd/url.go

@@ -28,7 +28,7 @@ func getURL(url string, insecure bool) (io.Reader, error) {
 	if err != nil {
 		return nil, err
 	}
-	req.Header.Set("User-Agent", fmt.Sprintf("gron/%s", version))
+	req.Header.Set("User-Agent", fmt.Sprintf("gron/%s", Version))
 	req.Header.Set("Accept", "application/json")
 
 	resp, err := client.Do(req)

flake.nix

@@ -31,12 +31,12 @@
             overlays = [ inputs.gomod2nix.overlays.default (final: prev: { }) ];
             config = { };
           };
+          version = inputs.self.shortRev or "development";
           gron = pkgs.buildGoApplication {
+            inherit version;
             pname = "gron";
-            version = self'.shortRev or "dirty";
-            # In 'nix develop', we don't need a copy of the source tree
-            # in the Nix store.
             src = ./.;
+            ldflags = [ "-X github.com/lafrenierejm/gron/cmd.Version=${version}" ];
             modules = ./gomod2nix.toml;
             meta = with pkgs.lib; {
               description =
@@ -50,7 +50,7 @@
           # Per-system attributes can be defined here. The self' and inputs'
           # module parameters provide easy access to attributes of the same
           # system.
-          packages = rec {
+          packages = {
             inherit gron;
             default = gron;
           };