Add version command (#25)

Signed-off-by: Ashmita Bohara <ashmita.bohara152@gmail.com>

.gitignore

@@ -31,6 +31,9 @@
 !.vscode/extensions.json
 *.code-workspace
 
+### goland ###
+.idea
+
 # End of https://www.toptal.com/developers/gitignore/api/go,vscode
 
 /dist/

cmd/root.go

@@ -30,6 +30,15 @@ var (
 
 	cfgFile string
 	cfg     = builder.DefaultConfig()
+
+	versionCmd = &cobra.Command{
+		Use:   "version",
+		Short: "Version of opentelemetry-collector-builder",
+		Long:  "Prints the version of opentelemetry-collector-builder binary",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println(version)
+		},
+	}
 )
 
 // Execute is the main entrypoint for this application
@@ -68,6 +77,9 @@ func Execute() {
 	cmd.Flags().StringVar(&cfg.Distribution.Go, "go", "/usr/bin/go", "The Go binary to use during the compilation phase")
 	cmd.Flags().StringVar(&cfg.Distribution.Module, "module", "github.com/jpkroehling/opentelemetry-collector-builder", "The Go module for the new distribution")
 
+	// version of this binary
+	cmd.AddCommand(versionCmd)
+
 	// tie Viper to flags
 	if err := viper.BindPFlags(cmd.Flags()); err != nil {
 		cfg.Logger.Error(err, "failed to bind flags")