Don't enable ANSI in cmd.exe until absolutely necessary

ansi_unix.go

@@ -2,5 +2,5 @@
 
 package lipgloss
 
-// enableANSIColors is only needed on Windows.
-func enableANSIColors() {}
+// enableLegacyWindowsANSI is only needed on Windows.
+func enableLegacyWindowsANSI() {}

ansi_windows.go

@@ -4,18 +4,23 @@ package lipgloss
 
 import (
 	"os"
+	"sync"
 
 	"golang.org/x/sys/windows"
 )
 
+var enableANSI sync.Once
+
 // enableANSIColors enables support for ANSI color sequences in the Windows
 // default console (cmd.exe and the PowerShell application). Note that this
 // only works with Windows 10. Also note that Windows Terminal supports colors
 // by default.
-func enableANSIColors() {
-	stdout := windows.Handle(os.Stdout.Fd())
-	var originalMode uint32
+func enableLegacyWindowsANSI() {
+	enableANSI.Do(func() {
+		stdout := windows.Handle(os.Stdout.Fd())
+		var originalMode uint32
 
-	windows.GetConsoleMode(stdout, &originalMode)
-	windows.SetConsoleMode(stdout, originalMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+		windows.GetConsoleMode(stdout, &originalMode)
+		windows.SetConsoleMode(stdout, originalMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+	})
 }

color.go

@@ -18,7 +18,6 @@ var (
 // actual check only once.
 func ColorProfile() termenv.Profile {
 	getColorProfile.Do(func() {
-		enableANSIColors()
 		colorProfile = termenv.ColorProfile()
 	})
 	return colorProfile

style.go

@@ -190,6 +190,10 @@ func (s Style) Render(str string) string {
 		useSpaceStyler = underlineSpaces || strikethroughSpaces
 	)
 
+	// Enable support for ANSI on the legacy Windows cmd.exe console. This is a
+	// no-op on non-Windows systems and on Windows runs only once.
+	enableLegacyWindowsANSI()
+
 	if bold {
 		te = te.Bold()
 	}