feat: allow for custom text in place of shell names

docs/docs/segment-shell.md

@@ -18,7 +18,13 @@ Show the current shell name (ZSH, powershell, bash, ...).
   "foreground": "#ffffff",
   "background": "#0077c2",
   "properties": {
-    "prefix": " \uFCB5 "
+    "mapped_shell_names": {
+      "pwsh": "PS"
+    }
   }
 }
 ```
+
+## Properties
+
+- mapped_shell_names: `object` - custom glyph/text to use in place of specified shell names (case-insensitive)

src/segment_shell.go

@@ -1,16 +1,31 @@
 package main
 
+import "strings"
+
 type shell struct {
 	props *properties
 	env   environmentInfo
 }
 
+const (
+	// MappedShellNames allows for custom text in place of shell names
+	MappedShellNames Property = "mapped_shell_names"
+)
+
 func (s *shell) enabled() bool {
 	return true
 }
 
 func (s *shell) string() string {
-	return s.env.getShellName()
+	mappedNames := s.props.getKeyValueMap(MappedShellNames, make(map[string]string))
+	shellName := s.env.getShellName()
+	for key, val := range mappedNames {
+		if strings.EqualFold(shellName, key) {
+			shellName = val
+			break
+		}
+	}
+	return shellName
 }
 
 func (s *shell) init(props *properties, env environmentInfo) {

src/segment_shell_test.go

@@ -17,3 +17,28 @@ func TestWriteCurrentShell(t *testing.T) {
 	}
 	assert.Equal(t, expected, s.string())
 }
+
+func TestUseMappedShellNames(t *testing.T) {
+	cases := []struct {
+		Shell    string
+		Expected string
+	}{
+		{Shell: "zsh", Expected: "zsh"},
+		{Shell: "pwsh", Expected: "PS"},
+		{Shell: "PWSH", Expected: "PS"},
+	}
+	for _, tc := range cases {
+		env := new(MockedEnvironment)
+		env.On("getShellName", nil).Return(tc.Expected, nil)
+		s := &shell{
+			env: env,
+			props: &properties{
+				values: map[Property]interface{}{
+					MappedShellNames: map[string]string{"pwsh": "PS"},
+				},
+			},
+		}
+		got := s.string()
+		assert.Equal(t, tc.Expected, got)
+	}
+}

themes/schema.json

@@ -1402,7 +1402,19 @@
           },
           "then": {
             "title": "Shell Segment",
-            "description": "https://ohmyposh.dev/docs/shell"
+            "description": "https://ohmyposh.dev/docs/shell",
+            "properties": {
+              "properties": {
+                "properties": {
+                  "custom_text": {
+                    "type": "object",
+                    "title": "Custom Text",
+                    "description": "Custom glyph/text for specific shells",
+                    "default": {}
+                  }
+                }
+              }
+            }
           }
         },
         {