Enable virtual terminal processing on Windows (microsoft#511)

Author: Sainan

cmd/tsgo/enablevtprocessing_other.go

@@ -0,0 +1,5 @@
+//go:build !windows
+
+package main
+
+func enableVirtualTerminalProcessing() {}

cmd/tsgo/enablevtprocessing_windows.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"golang.org/x/sys/windows"
+)
+
+func enableVirtualTerminalProcessing() {
+	hStdout, err := windows.GetStdHandle(windows.STD_OUTPUT_HANDLE)
+	if err == nil && hStdout != windows.InvalidHandle {
+		var mode uint32
+		err = windows.GetConsoleMode(windows.Handle(hStdout), &mode)
+		if err == nil {
+			windows.SetConsoleMode(windows.Handle(hStdout), mode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+		}
+	}
+}

cmd/tsgo/main.go

@@ -121,6 +121,9 @@ func parseArgs() *cliOptions {
 }
 
 func main() {
+	// TypeScript uses ANSI escape sequences which cmd.exe won't parse without enabling virtual terminal processing.
+	enableVirtualTerminalProcessing()
+
 	if args := os.Args[1:]; len(args) > 0 {
 		switch args[0] {
 		case "tsc":