Embed git tag as version number

.gitignore

@@ -1,2 +1,3 @@
 bin/
-librnnoise.go
+librnnoise.go
+version.go

main.go

@@ -15,6 +15,7 @@ import (
 )
 
 //go:generate go run scripts/embedlibrnnoise.go
+//go:generate go run scripts/embedversion.go
 
 type input struct {
 	ID        string
@@ -31,7 +32,7 @@ func main() {
 	}
 	defer f.Close()
 	log.SetOutput(f)
-	log.Println("Application starting.")
+	log.Printf("Application starting. Version: %s", version)
 
 	initializeConfigIfNot()
 	rnnoisefile := dumpLib()

scripts/embedversion.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func main() {
+	cmd := exec.Command("git", "describe", "--tags")
+	ret, err := cmd.Output()
+
+	if err != nil {
+		panic("Couldn't read git tags to embed version number")
+	}
+	version := strings.TrimSpace(string(ret))
+
+	out, _ := os.Create("version.go")
+	defer out.Close()
+
+	out.Write([]byte("package main \n\nvar version=\""))
+	out.Write([]byte(version))
+	out.Write([]byte("\"\n"))
+}

ui.go

@@ -30,7 +30,7 @@ func updatefn(w *nucular.Window, ui *uistate) {
 	}
 
 	w.Row(15).Dynamic(2)
-	w.Label("NoiseTorch", "LC")
+	w.Label("NoiseTorch ("+version+")", "LC")
 
 	if ui.noiseSupressorState == loaded {
 		w.LabelColored("Denoised virtual microphone active", "RC", color.RGBA{0, 255, 0, 255} /*green*/)