Adding a version command

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/setup-go@v2
         with:
           go-version: '^1.17.5'
-      - run: GOOS=linux GOARCH=amd64 go build -o metaprint-${GITHUB_REF##*/}-linux-x86_64 .
+      - run: GOOS=linux GOARCH=amd64 go build -ldflags="-X main.VERSION=${GITHUB_REF##*/} -X main.COMMIT=${GITHUB_SHA}" -o metaprint-${GITHUB_REF##*/}-linux-x86_64 .
       - uses: ncipollo/release-action@v1
         with:
           artifacts: "metaprint-*-*-*"

.gitignore

@@ -0,0 +1 @@
+metaprint-DEV-linux-x86_64

Makefile

@@ -1,5 +1,5 @@
 build:
-	go build
+	go build -ldflags="-X main.VERSION=DEV -X main.COMMIT=$(shell git rev-parse HEAD)" -o "metaprint-DEV-$(shell uname | tr '[:upper:]' '[:lower:]')-$(shell uname -m)" .
 
 install: build
-	sudo mv metaprint /usr/bin
+	sudo mv metaprint /usr/bin

main.go

@@ -3,18 +3,20 @@ package main
 import (
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/oxodao/metaprint/config"
 	"github.com/oxodao/metaprint/pulse"
 )
 
-const (
+var (
 	AUTHOR        = "Oxodao"
-	VERSION       = "0.3"
+	VERSION       = "0.5"
+	COMMIT        = "XXXXXXXXX"
 	SOFTWARE_NAME = "metaprint"
 )
 
-var otherCommands = []string{"pulseaudio-infos"}
+var otherCommands = []string{"pulseaudio-infos", "version"}
 
 func main() {
 	cfg := config.Load()
@@ -29,6 +31,9 @@ func main() {
 		switch os.Args[1] {
 		case "pulseaudio-infos":
 			pulse.PrintInfos()
+		case "version":
+			fmt.Printf("%v v%v (Commit %v) by %v\nhttps://github.com/%v/%v\n", SOFTWARE_NAME, VERSION, COMMIT, AUTHOR, strings.ToLower(AUTHOR), strings.ToLower(SOFTWARE_NAME))
+			os.Exit(1)
 		default:
 			printUsage()
 			os.Exit(1)