From 09dbf35a6a0b045e96c0124dafa9f3bd54729315 Mon Sep 17 00:00:00 2001
From: Sebastian Mark <smark@posteo.net>
Date: Sun, 10 Nov 2024 09:26:27 +0100
Subject: [PATCH] feat!: introduce `ChronoTomatoVersion`

- set version from `runtime/debug.Main.Version`
- use latest git tag as fallback
- allow version to be overwritten via ldflags
- this will break `go build .` and `go install .`
---
 cmd/client/app.go            |  9 +++++++++
 internal/metadata/version.go | 29 +++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 internal/metadata/version.go

diff --git a/cmd/client/app.go b/cmd/client/app.go
index 6a87b53..2c81581 100644
--- a/cmd/client/app.go
+++ b/cmd/client/app.go
@@ -2,8 +2,11 @@ package client
 
 import (
 	"flag"
+	"fmt"
+	"os"
 
 	"git.smsvc.net/pomodoro/ChronoTomato/internal/helper"
+	"git.smsvc.net/pomodoro/ChronoTomato/internal/metadata"
 	"git.smsvc.net/pomodoro/ChronoTomato/internal/websocket"
 	ChronoTomato "git.smsvc.net/pomodoro/ChronoTomato/pkg/models"
 	GoTomato "git.smsvc.net/pomodoro/GoTomato/pkg/models"
@@ -68,9 +71,15 @@ func Start() {
 		parameter_url        = flag.String("url", "", "GoTomato Server URL (eg ws://localhost:8080/ws)")
 		parameter_password   = flag.String("password", "", "Control password for pomodoro session")
 		parameter_configfile = flag.String("config", defaultConfigFile, "Path to config file")
+		showVersion          = flag.Bool("version", false, "Show Version")
 	)
 	flag.Parse()
 
+	if *showVersion {
+		fmt.Println("ChronoTomato", metadata.ChronoTomatoVersion)
+		os.Exit(0)
+	}
+
 	// read passed config file or try to use default config
 	if *parameter_configfile != defaultConfigFile {
 		config = helper.ParseConfig(*parameter_configfile)
diff --git a/internal/metadata/version.go b/internal/metadata/version.go
new file mode 100644
index 0000000..a451f85
--- /dev/null
+++ b/internal/metadata/version.go
@@ -0,0 +1,29 @@
+package metadata
+
+import (
+	"os/exec"
+	"runtime/debug"
+	"strings"
+)
+
+var ChronoTomatoVersion = ""
+
+func getLatestTag() string {
+	bytes, _ := exec.Command("git", "describe", "--tags").Output()
+	output := strings.TrimSpace(string(bytes))
+	return output
+}
+
+// set GoTomatoVersion from runtime/debug.Main.Version
+// use latest git tag as fallback
+// can be overwritten via ldflags (e,g. by goreleaser)
+func init() {
+	if ChronoTomatoVersion == "" {
+		info, _ := debug.ReadBuildInfo()
+		if info.Main.Version != "(devel)" {
+			ChronoTomatoVersion = info.Main.Version
+		} else {
+			ChronoTomatoVersion = getLatestTag()
+		}
+	}
+}