feat: add OS template property

docs/docs/segment-os.md

@@ -50,3 +50,7 @@ Display OS specific info. Defaults to Icon.
 - sabayon: `string` - the icon to use for Sabayon - defaults to Sabayon icon - defaults to `\uF317`
 - slackware: `string` - the icon to use for Slackware - defaults to Slackware icon - defaults to `\uF319`
 - ubuntu: `string` - the icon to use for Ubuntu - defaults to Ubuntu icon - defaults to `\uF31b`
+
+## Template Properties
+
+- `.OS`: `string` - the OS platform

src/environment.go

@@ -21,6 +21,8 @@ import (
 const (
 	unknown         = "unknown"
 	windowsPlatform = "windows"
+	darwinPlatform  = "darwin"
+	linuxPlatform   = "linux"
 )
 
 type commandError struct {

src/segment_os.go

@@ -7,6 +7,7 @@ import (
 type osInfo struct {
 	props *properties
 	env   environmentInfo
+	OS    string
 }
 
 const (
@@ -70,20 +71,25 @@ func (n *osInfo) string() string {
 	goos := n.env.getRuntimeGOOS()
 	switch goos {
 	case windowsPlatform:
+		n.OS = windowsPlatform
 		return n.props.getString(Windows, "\uE62A")
-	case "darwin":
+	case darwinPlatform:
+		n.OS = darwinPlatform
 		return n.props.getString(MacOS, "\uF179")
-	case "linux":
+	case linuxPlatform:
 		wsl := n.env.getenv("WSL_DISTRO_NAME")
 		p := n.env.getPlatform()
 		if len(wsl) == 0 {
+			n.OS = p
 			return n.getDistroName(p, "")
 		}
+		n.OS = wsl
 		return fmt.Sprintf("%s%s%s",
 			n.props.getString(WSL, "WSL"),
 			n.props.getString(WSLSeparator, " - "),
 			n.getDistroName(p, wsl))
 	default:
+		n.OS = goos
 		return goos
 	}
 }

src/segment_os_test.go

@@ -78,5 +78,12 @@ func TestOSInfo(t *testing.T) {
 			props: props,
 		}
 		assert.Equal(t, tc.ExpectedString, osInfo.string(), tc.Case)
+		if tc.WSLDistro != "" {
+			assert.Equal(t, tc.WSLDistro, osInfo.OS, tc.Case)
+		} else if tc.Platform != "" {
+			assert.Equal(t, tc.Platform, osInfo.OS, tc.Case)
+		} else {
+			assert.Equal(t, tc.GOOS, osInfo.OS, tc.Case)
+		}
 	}
 }