Add version command

Author: dvob

.goreleaser.yml

@@ -1,6 +1,10 @@
 project_name: pcert
 builds:
 - main: ./cmd/pcert/
+  ldflags:
+  - -s -w
+  - -X main.version={{.Version}}
+  - -X main.commit={{.Commit}}
   goos:
   - linux
   - darwin

cmd/pcert/main.go

@@ -20,6 +20,11 @@ const (
 	csrFileSuffix  = ".csr"
 )
 
+var (
+	version = "n/a"
+	commit  = "n/a"
+)
+
 type app struct {
 	// signer settings
 	signCertFile string
@@ -192,10 +197,22 @@ prefix (e.g PCERT_CERT instad of --cert).`,
 		newSignCmd(cfg),
 		newListCmd(),
 		newCompletionCmd(),
+		newVersionCmd(),
 	)
 	return cmd
 }
 
+func newVersionCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use: "version",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			fmt.Println("pcert", version, commit)
+			return nil
+		},
+	}
+	return cmd
+}
+
 func newCompletionCmd() *cobra.Command {
 	var shell string
 	cmd := &cobra.Command{