pvcexec-4 Implement version sub-command

Author: ljufa

.goreleaser.yml

@@ -1,6 +1,11 @@
 builds:
-  - main: main.go
+  -
+    main: main.go
     binary: kubectl-pvcexec
+      # Custom ldflags templates.
+      # Default is `-s -w -X main.version={{.Version}} -X main.commit={{.ShortCommit}} -X main.date={{.Date}}`.
+    ldflags:
+        - --s -w -X github.com/kubextender/pvcexec/pkg/cmd.version={{.Version}} -X github.com/kubextender/pvcexec/pkg/cmd.commit={{.ShortCommit}} -X github.com/kubextender/pvcexec/pkg/cmd.date={{.Date}}
     goos:
       - darwin
       - linux

pkg/cmd/pvcexec.go

@@ -29,5 +29,6 @@ func NewPvcExecCmd(streams genericclioptions.IOStreams) *cobra.Command {
 	o := NewPvcExecOptions(streams)
 	cmd.AddCommand(NewMcCommand(o))
 	cmd.AddCommand(NewZshCommand(o))
+	cmd.AddCommand(NewVersionCommand(streams))
 	return cmd
 }

pkg/cmd/version.go

@@ -0,0 +1,30 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/spf13/cobra"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+)
+
+var (
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
+)
+
+func GetVersion() string {
+	return fmt.Sprintf("Version=%v (commit %v, built at %v)", version, commit, date)
+}
+
+// NewVersionCommand provides the version command.
+func NewVersionCommand(streams genericclioptions.IOStreams) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "version",
+		Short: "Print the version information for pvcexec",
+		RunE: func(c *cobra.Command, args []string) error {
+			fmt.Fprintln(streams.Out, GetVersion())
+			return nil
+		},
+	}
+	return cmd
+}