core/commands2: Added 'version' command

core/commands2/root.go

@@ -65,6 +65,7 @@ var rootSubcommands = map[string]*cmds.Command{
 	"diag":     diagCmd,
 	"pin":      pinCmd,
 	"unpin":    unpinCmd,
+	"version":  versionCmd,
 
 	// test subcommands
 	// TODO: remove these when we don't need them anymore

core/commands2/version.go

+package commands
+
+import (
+	"errors"
+
+	cmds "github.com/jbenet/go-ipfs/commands"
+	config "github.com/jbenet/go-ipfs/config"
+)
+
+type VersionOutput struct {
+	Version string
+}
+
+var versionCmd = &cmds.Command{
+	Options: []cmds.Option{
+		cmds.Option{[]string{"number", "n"}, cmds.Bool},
+	},
+	Help: `ipfs version - Show ipfs version information.
+
+    Returns the current version of ipfs and exits.
+  `,
+	Run: func(res cmds.Response, req cmds.Request) {
+		res.SetOutput(&VersionOutput{
+			Version: config.CurrentVersionNumber,
+		})
+	},
+	Marshallers: map[cmds.EncodingType]cmds.Marshaller{
+		cmds.Text: func(res cmds.Response) ([]byte, error) {
+			v := res.Output().(*VersionOutput)
+			s := ""
+
+			opt, found := res.Request().Option("number")
+			number, ok := opt.(bool)
+			if found && !ok {
+				return nil, errors.New("cast error")
+			}
+
+			if !number {
+				s += "ipfs version "
+			}
+			s += v.Version
+			return []byte(s), nil
+		},
+	},
+	Type: &VersionOutput{},
+}