version flag

.goreleaser.yaml

@@ -16,7 +16,7 @@ builds:
     ldflags:
       - '-s'
       - '-w'
-      - '-X github.com/nothub/gobonsai/buildinfo.Version={{ .Version }}'
+      - '-X main.Version={{ .Version }}'
     goos:
       - linux
       - darwin

README.md

@@ -39,11 +39,12 @@ Flags:
   -p, --print            print first tree to stdout and exit immediately
   -s, --seed int         seed random number generator (default random)
   -h, --help             show help
+  -V, --version          show version
 ```
 
 ---
 
-[gobonsai](https://github.com/nothub/gobonsai) is a `go` port of  
-[cbonsai](https://gitlab.com/jallbrit/cbonsai) (written in `C` and itself a port of  
-[bonsai.sh](https://gitlab.com/jallbrit/bonsai.sh) (written in `bash` and itself a port of  
+[gobonsai](https://github.com/nothub/gobonsai) is a `go` port of
+[cbonsai](https://gitlab.com/jallbrit/cbonsai) (written in `C` and itself a port of
+[bonsai.sh](https://gitlab.com/jallbrit/bonsai.sh) (written in `bash` and itself a port of
 [bonsai](https://avelican.github.io/bonsai/) (written in `javascript`))).

buildinfo.go

@@ -1,4 +1,4 @@
 package main
 
 // The Version variable will be populated at build-time.
-var Version = ""
+var Version = "unknown"

options.go

@@ -56,6 +56,7 @@ func options() opts {
 	pflag.BoolVarP(&o.print, "print", "p", false, "print first tree to stdout and exit immediately")
 	seed := pflag.Int64P("seed", "s", 0, "seed random number generator (default random)")
 	help := pflag.BoolP("help", "h", false, "show help")
+	version := pflag.BoolP("version", "V", false, "show version")
 	pflag.Parse()
 
 	if *help {
@@ -71,6 +72,11 @@ func options() opts {
 		os.Exit(0)
 	}
 
+	if *version {
+		fmt.Printf("Version: %s\n", Version)
+		os.Exit(0)
+	}
+
 	if o.screensaver {
 		o.live = true
 		o.infinite = true