From 751ccd2cd43242bc1856f0ead80122a4181ae1dd Mon Sep 17 00:00:00 2001
From: Nazar Kanaev <nkanaev@live.com>
Date: Thu, 24 Sep 2020 11:01:42 +0100
Subject: [PATCH] show version info

---
 main.go  | 11 +++++++++++
 makefile | 12 +++++++++---
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/main.go b/main.go
index db12a35..391fc6c 100644
--- a/main.go
+++ b/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"flag"
+	"fmt"
 	"github.com/nkanaev/yarr/server"
 	"github.com/nkanaev/yarr/storage"
 	"github.com/nkanaev/yarr/platform"
@@ -10,12 +11,22 @@ import (
 	"path/filepath"
 )
 
+var Version string = "v0.0"
+var GitHash string = "unknown"
+
 func main() {
 	var addr, storageFile string
+	var ver bool
 	flag.StringVar(&addr, "addr", "127.0.0.1:7070", "address to run server on")
 	flag.StringVar(&storageFile, "db", "", "storage file path")
+	flag.BoolVar(&ver, "version", false, "print application version")
 	flag.Parse()
 
+	if ver {
+		fmt.Printf("%s (%s)\n", Version, GitHash)
+		return
+	}
+
 	logger := log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile)
 
 	configPath, err := os.UserConfigDir()
diff --git a/makefile b/makefile
index 2ac8483..264388b 100644
--- a/makefile
+++ b/makefile
@@ -1,6 +1,12 @@
+VERSION=v1.0
+GITHASH=$(shell git rev-parse --short=8 HEAD)
+
 ASSETS = assets/javascripts/* assets/stylesheets/* assets/graphicarts/* assets/index.html
 CGO_ENABLED=1
 
+GO_LDFLAGS  = -s -w
+GO_LDFLAGS := $(GO_LDFLAGS) -X 'main.Version=$(VERSION)' -X 'main.GitHash=$(GITHASH)'
+
 default: bundle
 
 server/assets_bundle.go: $(ASSETS)
@@ -12,7 +18,7 @@ build_macos: bundle
 	set GOOS=darwin
 	set GOARCH=amd64
 	mkdir -p _output/macos
-	go build -tags "sqlite_foreign_keys release macos" -ldflags="-s -w" -o _output/macos/yarr main.go
+	go build -tags "sqlite_foreign_keys release macos" -ldflags="$(GO_LDFLAGS)" -o _output/macos/yarr main.go
 	cp artwork/icon.png _output/macos/icon.png
 	go run scripts/package_macos.go _output/macos
 
@@ -20,11 +26,11 @@ build_linux: bundle
 	set GOOS=linux
 	set GOARCH=386
 	mkdir -p _output/linux
-	go build -tags "sqlite_foreign_keys release linux" -ldflags="-s -w" -o _output/linux/yarr main.go
+	go build -tags "sqlite_foreign_keys release linux" -ldflags="$(GO_LDFLAGS)" -o _output/linux/yarr main.go
 
 build_windows: bundle
 	set GOOS=windows
 	set GOARCH=386
 	mkdir -p _output/windows
 	windres -i artwork/versioninfo.rc -O coff -o platform/versioninfo.syso
-	go build -tags "sqlite_foreign_keys release windows" -ldflags="-s -w -H windowsgui" -o _output/windows/yarr.exe main.go
+	go build -tags "sqlite_foreign_keys release windows" -ldflags="$(GO_LDFLAGS) -H windowsgui" -o _output/windows/yarr.exe main.go