Merge pull request #167 from mxcoder/issue-158--show-version

Add version flag to show the current version of the tool

.github/workflows/go.yml

@@ -23,7 +23,7 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Build
-      run: go build -v ./cmd/kaf
+      run: go build -v -ldflags "-s -w -X main.version=$GITHUB_REF -X main.commit=${GITHUB_SHA::8}" ./cmd/kaf
 
     - name: Test
       run: go test -v ./...

README.md

@@ -28,6 +28,10 @@ yay -S kaf
 
 ## Usage
 
+Show the tool version
+
+`kaf --version`
+
 Add a local Kafka with no auth
 
 `kaf config add-cluster local -b localhost:9092`

cmd/kaf/kaf.go

@@ -123,9 +123,15 @@ var (
 	colorableOut io.Writer = colorable.NewColorableStdout()
 )
 
+// Will be replaced by GitHub action and by goreleaser
+// see https://goreleaser.com/customization/build/
+var commit string = "HEAD"
+var version string = "latest"
+
 var rootCmd = &cobra.Command{
-	Use:   "kaf",
-	Short: "Kafka Command Line utility for cluster management",
+	Use:     "kaf",
+	Short:   "Kafka Command Line utility for cluster management",
+	Version: fmt.Sprintf("%s (%s)", version, commit),
 	PersistentPreRun: func(cmd *cobra.Command, args []string) {
 		outWriter = cmd.OutOrStdout()
 		errWriter = cmd.ErrOrStderr()