Embed git tag as version for version command

Author: h3poteto

Makefile

@@ -2,9 +2,15 @@
 
 OUTPUT = ecs-task
 OUTDIR = bin
-BUILD_CMD = go build -a -tags netgo -installsuffix netgo --ldflags '-extldflags "-static"'
+BUILD_CMD = go build -a -tags netgo -installsuffix netgo -ldflags \
+" \
+  -extldflags '-static' \
+  -X github.com/h3poteto/ecs-task/cmd.version=$(shell git describe --tag --abbrev=0) \
+  -X github.com/h3poteto/ecs-task/cmd.revision=$(shell git rev-list -1 HEAD) \
+  -X github.com/h3poteto/ecs-task/cmd.build=$(shell git describe --tags) \
+"
 ARCHITECTURE = amd64 arm64
-VERSION = v1.0.0
+VERSION = $(shell git describe --tag --abbrev=0)
 
 all: mac linux windows
 

cmd/version.go

@@ -6,12 +6,20 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var (
+	version  string
+	revision string
+	build    string
+)
+
 func versionCmd() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "version",
 		Short: "Print the version number",
 		Run: func(cmd *cobra.Command, args []string) {
-			fmt.Println("ecs-task v0.2.7")
+			fmt.Printf("Version : %s\n", version)
+			fmt.Printf("Revision: %s\n", revision)
+			fmt.Printf("Build   : %s\n", build)
 		},
 	}