From b35da82d3c807cefc560322a1cd4a97238cf7835 Mon Sep 17 00:00:00 2001
From: Christian Ege <ch@ege.io>
Date: Tue, 14 May 2024 14:56:05 +0200
Subject: [PATCH] fix: use the right version information when go install is
 used

Signed-off-by: Christian Ege <ch@ege.io>
---
 cmd/ovp8xx/cmd/root.go          |  3 +++
 cmd/ovp8xx/ovp8xx.go            | 10 +++++++
 internal/versioninfo/version.go | 46 +++++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+)
 create mode 100644 internal/versioninfo/version.go

diff --git a/cmd/ovp8xx/cmd/root.go b/cmd/ovp8xx/cmd/root.go
index dce12e1..b1b5435 100644
--- a/cmd/ovp8xx/cmd/root.go
+++ b/cmd/ovp8xx/cmd/root.go
@@ -11,6 +11,8 @@ import (
 	"github.com/spf13/cobra"
 )
 
+// SetVersionInfo sets the version information for the root command.
+// It formats the version, commit, and date into a string and assigns it to the rootCmd.Version variable.
 func SetVersionInfo(version, commit, date string) {
 	rootCmd.Version = fmt.Sprintf("%s (Built on %s from Git SHA %s)", version, date, commit)
 }
@@ -33,4 +35,5 @@ func Execute() {
 
 func init() {
 	rootCmd.PersistentFlags().String("ip", ovp8xx.GetEnv("OVP8XX_IP", "192.168.0.69"), "The IP address or hostname of the OVP8XX. If not provided the default will be taken from the environment variable OVP8XX_IP")
+
 }
diff --git a/cmd/ovp8xx/ovp8xx.go b/cmd/ovp8xx/ovp8xx.go
index 89e8b00..e7a34f1 100644
--- a/cmd/ovp8xx/ovp8xx.go
+++ b/cmd/ovp8xx/ovp8xx.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"github.com/graugans/go-ovp8xx/v2/cmd/ovp8xx/cmd"
+	"github.com/graugans/go-ovp8xx/v2/internal/versioninfo"
 )
 
 var (
@@ -11,6 +12,15 @@ var (
 )
 
 func main() {
+	// If the version is "dev", it means that the binary is built using "go install",
+	// "go build" or "go run".
+	// However, if the binary is build by Goreleaser we use that version.
+	if version == "dev" {
+		version = versioninfo.Version
+		commit = versioninfo.Revision
+		date = versioninfo.LastCommit.String()
+	}
+
 	cmd.SetVersionInfo(
 		version,
 		commit,
diff --git a/internal/versioninfo/version.go b/internal/versioninfo/version.go
new file mode 100644
index 0000000..63335e9
--- /dev/null
+++ b/internal/versioninfo/version.go
@@ -0,0 +1,46 @@
+// Package versioninfo uses runtime.ReadBuildInfo() to set global executable revision information if possible.
+package versioninfo
+
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2021 Carl Johnson
+// Based on https://github.com/earthboundkid/versioninfo
+
+import (
+	"runtime/debug"
+	"time"
+)
+
+var (
+	// Version will be the version tag if the binary is built with "go install url/tool@version".
+	// If the binary is built some other way, it will be "(devel)".
+	Version = "unknown"
+	// Revision is taken from the vcs.revision tag in Go 1.18+.
+	Revision = "unknown"
+	// LastCommit is taken from the vcs.time tag in Go 1.18+.
+	LastCommit time.Time
+	// DirtyBuild is taken from the vcs.modified tag in Go 1.18+.
+	DirtyBuild = true
+)
+
+func init() {
+	info, ok := debug.ReadBuildInfo()
+	if !ok {
+		return
+	}
+	for _, kv := range info.Settings {
+		if kv.Value == "" {
+			continue
+		}
+		switch kv.Key {
+		case "vcs.revision":
+			Revision = kv.Value
+		case "vcs.time":
+			LastCommit, _ = time.Parse(time.RFC3339, kv.Value)
+		case "vcs.modified":
+			DirtyBuild = kv.Value == "true"
+		}
+	}
+	if info.Main.Version != "" {
+		Version = info.Main.Version
+	}
+}