implement --format for version command

Signed-off-by: Tomas Tomecek <ttomecek@redhat.com>

1 files changed, 28 insertions, 5 deletions

diff --git a/cmd/podman/version.go b/cmd/podman/version.go
index d80f24a14..d81deb696 100644
--- a/cmd/podman/version.go
+++ b/cmd/podman/version.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/containers/libpod/cmd/podman/formats"
 	"github.com/containers/libpod/libpod"
 	"github.com/pkg/errors"
 	"github.com/urfave/cli"
@@ -15,6 +16,19 @@ func versionCmd(c *cli.Context) error {
 	if err != nil {
 		errors.Wrapf(err, "unable to determine version")
 	}
+
+	versionOutputFormat := c.String("format")
+	if versionOutputFormat != "" {
+		var out formats.Writer
+		switch versionOutputFormat {
+		case formats.JSONString:
+			out = formats.JSONStruct{Output: output}
+		default:
+			out = formats.StdoutTemplate{Output: output, Template: versionOutputFormat}
+		}
+		formats.Writer(out).Out()
+		return nil
+	}
 	fmt.Println("Version:      ", output.Version)
 	fmt.Println("Go Version:   ", output.GoVersion)
 	if output.GitCommit != "" {
@@ -30,8 +44,17 @@ func versionCmd(c *cli.Context) error {
 }
 
 // Cli command to print out the full version of podman
-var versionCommand = cli.Command{
-	Name:   "version",
-	Usage:  "Display the PODMAN Version Information",
-	Action: versionCmd,
-}
+var (
+	versionCommand = cli.Command{
+		Name:   "version",
+		Usage:  "Display the Podman Version Information",
+		Action: versionCmd,
+		Flags:  versionFlags,
+	}
+	versionFlags = []cli.Flag{
+		cli.StringFlag{
+			Name:  "format",
+			Usage: "Change the output format to JSON or a Go template",
+		},
+	}
+)