pkg/homedir: implement GetShortcutString()

Signed-off-by: Ahmet Alp Balkan <ahmetalpbalkan@gmail.com>

pkg/homedir/homedir.go

@@ -14,3 +14,12 @@ func Get() string {
 	}
 	return os.Getenv("HOME")
 }
+
+// GetShortcutString returns the string that is shortcut to user's home directory
+// in the native shell of the platform running on.
+func GetShortcutString() string {
+	if runtime.GOOS == "windows" {
+		return "%USERPROFILE%" // be careful while using in format functions
+	}
+	return "~"
+}

pkg/homedir/homedir_test.go

@@ -15,3 +15,10 @@ func TestGet(t *testing.T) {
 		t.Fatalf("returned path is not absolute: %s", home)
 	}
 }
+
+func TestGetShortcutString(t *testing.T) {
+	shortcut := GetShortcutString()
+	if shortcut == "" {
+		t.Fatal("returned shortcut string is empty")
+	}
+}