Added segment for rbenv to display the current ruby version

main.go

@@ -114,6 +114,7 @@ var modules = map[string]func(*powerline) []pwl.Segment{
 	"perlbrew":            segmentPerlbrew,
 	"plenv":               segmentPlEnv,
 	"perms":               segmentPerms,
+	"rbenv":               segmentRbenv,
 	"root":                segmentRoot,
 	"shell-var":           segmentShellVar,
 	"shenv":               segmentShEnv,

segment-rbenv.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	pwl "github.com/justjanne/powerline-go/powerline"
+	"os/exec"
+	"strings"
+)
+
+func runRbenvCommand(cmd string, args ...string) (string, error) {
+	command := exec.Command(cmd, args...)
+	out, err := command.Output()
+	return string(out), err
+}
+
+func segmentRbenv(p *powerline) []pwl.Segment {
+	out, err := runRbenvCommand("rbenv", "version")
+
+	if err == nil {
+		items := strings.Split(out, " ")
+		if len(items) > 1 {
+			return []pwl.Segment{{
+				Name:       "rbenv",
+				Content:    items[0],
+				Foreground: p.theme.TimeFg,
+				Background: p.theme.TimeBg,
+			}}	
+		}
+	}
+
+	return []pwl.Segment{}
+}