From 2fa0d652db7dbda332f5d7d2688d70ae8536a23d Mon Sep 17 00:00:00 2001
From: Nuno Cruces <ncruces@users.noreply.github.com>
Date: Wed, 11 Aug 2021 23:32:43 +0100
Subject: [PATCH] Fixes #16.

---
 cmd/zenity/build.sh | 10 ++++++----
 cmd/zenity/main.go  | 12 ++++++++++++
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/cmd/zenity/build.sh b/cmd/zenity/build.sh
index 37f81ca..7ae543c 100755
--- a/cmd/zenity/build.sh
+++ b/cmd/zenity/build.sh
@@ -1,19 +1,21 @@
 #!/bin/bash
 
+TAG=$(git tag --sort=-version:refname | head -n 1)
+
 go run github.com/josephspurrier/goversioninfo/cmd/goversioninfo
 
-GOOS=windows GOARCH=386 go build -ldflags="-s -w" -trimpath &&
+GOOS=windows GOARCH=386 go build -ldflags="-s -w -X main.tag=$TAG" -trimpath &&
 zip -9 zenity_win32.zip zenity.exe &&
 rm zenity.exe
 
-GOOS=windows GOARCH=amd64 go build -ldflags="-s -w" -trimpath &&
+GOOS=windows GOARCH=amd64 go build -ldflags="-s -w -X main.tag=$TAG" -trimpath &&
 zip -9 zenity_win64.zip zenity.exe &&
 rm zenity.exe
 
 rm resource.syso
 
-GOOS=darwin GOARCH=amd64 go build -ldflags="-s -w" -trimpath -o zenity_macos_x64 &&
-GOOS=darwin GOARCH=arm64 go build -ldflags="-s -w" -trimpath -o zenity_macos_arm &&
+GOOS=darwin GOARCH=amd64 go build -ldflags="-s -w -X main.tag=$TAG" -trimpath -o zenity_macos_x64 &&
+GOOS=darwin GOARCH=arm64 go build -ldflags="-s -w -X main.tag=$TAG" -trimpath -o zenity_macos_arm &&
 go run github.com/randall77/makefat zenity zenity_macos_x64 zenity_macos_arm &&
 zip -9 zenity_macos.zip zenity &&
 rm zenity zenity_macos_* 
diff --git a/cmd/zenity/main.go b/cmd/zenity/main.go
index b347dd9..ad3ef14 100644
--- a/cmd/zenity/main.go
+++ b/cmd/zenity/main.go
@@ -7,6 +7,7 @@ import (
 	"context"
 	"errors"
 	"flag"
+	"fmt"
 	"image/color"
 	"os"
 	"os/exec"
@@ -23,6 +24,8 @@ const (
 	unspecified = "\x00"
 )
 
+var tag = "v0.0.0"
+
 var (
 	// Application Options
 	errorDlg          bool
@@ -88,6 +91,9 @@ var (
 	unixeol bool
 	cygpath bool
 	wslpath bool
+
+	// Command options
+	version bool
 )
 
 func init() {
@@ -233,6 +239,7 @@ func setupFlags() {
 	}
 
 	// Command options
+	flag.BoolVar(&version, "version", false, "Show version of program")
 	flag.IntVar(&zenutil.Timeout, "timeout", 0, "Set dialog `timeout` in seconds")
 	flag.StringVar(&zenutil.Separator, "separator", "|", "Set output `separator` character")
 
@@ -247,6 +254,11 @@ func setupFlags() {
 
 func validateFlags() {
 	var n int
+	if version {
+		fmt.Printf("zenity %s %s/%s\n", tag, runtime.GOOS, runtime.GOARCH)
+		fmt.Println("https://github.com/ncruces/zenity")
+		os.Exit(0)
+	}
 	if errorDlg {
 		n++
 	}