From 17826afb1e7ed63f8dc052a2e109cb2507400f20 Mon Sep 17 00:00:00 2001
From: Luther Wen Xu <lutherchanpublic+git@gmail.com>
Date: Wed, 27 Nov 2019 20:16:32 +0800
Subject: [PATCH] modules/commands: Implement 'pgqversion' command

---
 modules/commands/commands.go |  4 ++++
 modules/commands/version.go  | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 modules/commands/version.go

diff --git a/modules/commands/commands.go b/modules/commands/commands.go
index 0a7e5f8..a73b6e9 100644
--- a/modules/commands/commands.go
+++ b/modules/commands/commands.go
@@ -24,4 +24,8 @@ var list = []command{
 		Name:    "star",
 		Handler: handleStarCommand,
 	},
+	command{
+		Name:    "version",
+		Handler: handleVersionCommand,
+	},
 }
diff --git a/modules/commands/version.go b/modules/commands/version.go
new file mode 100644
index 0000000..f4fc6e5
--- /dev/null
+++ b/modules/commands/version.go
@@ -0,0 +1,34 @@
+package commands
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+
+	"github.com/bwmarrin/discordgo"
+
+	"PermissionGacha/modules/log"
+)
+
+var versionString string
+
+func handleVersionCommand(s *discordgo.Session, args []string, m *discordgo.MessageCreate) error {
+	if versionString == "" {
+		out, err := exec.Command("git describe --tags").Output()
+		if err != nil {
+			log.Error(
+				s,
+				fmt.Errorf("modules/commands: error while requesting version information from git: %v", err),
+			)
+			versionString = "Error while generating version string."
+		} else {
+			info := strings.Split(string(out), " ")
+			versionString = fmt.Sprintf(
+				"**VERSION > **Current running version: __%s.%s__ (Internal ID: %s)",
+				info[0], info[1], info[2],
+			)
+		}
+	}
+	s.ChannelMessageSend(m.ChannelID, versionString)
+	return nil
+}