Added segment to display current node version

Added an additional segment to the node module to display the current
node version.

defaults.go

@@ -255,8 +255,10 @@ var defaults = Config{
 			ShEnvFg: 15,
 			ShEnvBg: 130,
 
-			NodeFg: 15,
-			NodeBg: 40,
+			NodeFg:        15,
+			NodeBg:        40,
+			NodeVersionFg: 40,
+			NodeVersionBg: 15,
 
 			LoadFg:           15,
 			LoadBg:           22,
@@ -955,6 +957,8 @@ var defaults = Config{
 			ShEnvBg:            9,
 			NodeFg:             15,
 			NodeBg:             40,
+			NodeVersionFg:      40,
+			NodeVersionBg:      15,
 			LoadFg:             15,
 			LoadBg:             2,
 			LoadHighBg:         5,
@@ -1287,6 +1291,8 @@ var defaults = Config{
 			ShEnvBg:            9,
 			NodeFg:             15,
 			NodeBg:             40,
+			NodeVersionFg:      40,
+			NodeVersionBg:      15,
 			LoadFg:             15,
 			LoadBg:             2,
 			LoadHighBg:         5,
@@ -1618,6 +1624,8 @@ var defaults = Config{
 			ShellVarBg:         gruvbox_faded_purple, // match ssh-bg
 			NodeFg:             gruvbox_light0,       // match virtualenv
 			NodeBg:             gruvbox_faded_green,  // match virtualenv
+			NodeVersionFg:      gruvbox_faded_green,  // match virtualenv
+			NodeVersionBg:      gruvbox_light0,       // match virtualenv
 			LoadFg:             gruvbox_light0,
 			LoadBg:             gruvbox_faded_purple,
 			LoadHighBg:         gruvbox_neutral_red,

segment-node.go

@@ -4,6 +4,8 @@ import (
 	"encoding/json"
 	"io/ioutil"
 	"os"
+	"os/exec"
+	"strings"
 
 	pwl "github.com/justjanne/powerline-go/powerline"
 )
@@ -14,27 +16,58 @@ type packageJSON struct {
 	Version string `json:"version"`
 }
 
-func segmentNode(p *powerline) []pwl.Segment {
+func getNodeVersion() string {
+	out, err := exec.Command("node", "--version").Output()
+	if err != nil {
+		return ""
+	}
+	return strings.TrimSuffix(string(out), "\n")
+}
+
+func getPackageVersion() string {
 	stat, err := os.Stat(pkgfile)
 	if err != nil {
-		return []pwl.Segment{}
+		return ""
 	}
 	if stat.IsDir() {
-		return []pwl.Segment{}
+		return ""
 	}
 	pkg := packageJSON{"!"}
 	raw, err := ioutil.ReadFile(pkgfile)
 	if err != nil {
-		return []pwl.Segment{}
+		return ""
 	}
 	err = json.Unmarshal(raw, &pkg)
 	if err != nil {
-		return []pwl.Segment{}
+		return ""
 	}
-	return []pwl.Segment{{
-		Name:       "node-segment",
-		Content:    pkg.Version + " \u2B22",
-		Foreground: p.theme.NodeFg,
-		Background: p.theme.NodeBg,
-	}}
+
+	return strings.TrimSpace(pkg.Version)
+}
+
+func segmentNode(p *powerline) []pwl.Segment {
+	nodeVersion := getNodeVersion()
+	packageVersion := getPackageVersion()
+
+	segments := []pwl.Segment{}
+
+	if nodeVersion != "" {
+		segments = append(segments, pwl.Segment{
+			Name:       "node",
+			Content:    "\u2B22 " + nodeVersion,
+			Foreground: p.theme.NodeVersionFg,
+			Background: p.theme.NodeVersionBg,
+		})
+	}
+
+	if packageVersion != "" {
+		segments = append(segments, pwl.Segment{
+			Name:       "node-segment",
+			Content:    packageVersion + " \u2B22",
+			Foreground: p.theme.NodeFg,
+			Background: p.theme.NodeBg,
+		})
+	}
+
+	return segments
 }

themes.go

@@ -135,8 +135,10 @@ type Theme struct {
 	ShEnvFg uint8
 	ShEnvBg uint8
 
-	NodeFg uint8
-	NodeBg uint8
+	NodeFg        uint8
+	NodeBg        uint8
+	NodeVersionFg uint8
+	NodeVersionBg uint8
 
 	LoadFg           uint8
 	LoadBg           uint8

themes/default.json

@@ -64,6 +64,8 @@
   "ShEnvBg": 130,
   "NodeFg": 15,
   "NodeBg": 40,
+  "NodeVersionFg": 40,
+  "NodeVersionBg": 15,
   "LoadFg": 15,
   "LoadBg": 22,
   "LoadHighBg": 161,