v0.1.0 initial commit

detect_unix.go

@@ -0,0 +1,52 @@
+//go:build unix
+
+package terminal
+
+import (
+	"os"
+	"strings"
+
+	"golang.org/x/sys/unix"
+)
+
+// DetectColorMode determines terminal color capability from environment
+func DetectColorMode() ColorMode {
+	colorterm := os.Getenv("COLORTERM")
+	if colorterm == "truecolor" || colorterm == "24bit" {
+		return ColorModeTrueColor
+	}
+
+	if os.Getenv("KITTY_WINDOW_ID") != "" ||
+		os.Getenv("KONSOLE_VERSION") != "" ||
+		os.Getenv("ITERM_SESSION_ID") != "" ||
+		os.Getenv("ALACRITTY_WINDOW_ID") != "" ||
+		os.Getenv("ALACRITTY_LOG") != "" ||
+		os.Getenv("WEZTERM_PANE") != "" {
+		return ColorModeTrueColor
+	}
+
+	term := os.Getenv("TERM")
+	if strings.Contains(term, "truecolor") ||
+		strings.Contains(term, "24bit") ||
+		strings.Contains(term, "direct") {
+		return ColorModeTrueColor
+	}
+
+	return ColorMode256
+}
+
+// resetTerminalMode attempts to restore terminal to cooked mode
+// Best-effort for crash recovery; errors ignored
+func resetTerminalMode() {
+	// Try to restore via /dev/tty (works even if stdin redirected)
+	if tty, err := os.OpenFile("/dev/tty", os.O_RDWR, 0); err == nil {
+		defer tty.Close()
+		fd := int(tty.Fd())
+		// Get current termios, enable ECHO and ICANON
+		if termios, err := unix.IoctlGetTermios(fd, unix.TCGETS); err == nil {
+			termios.Lflag |= unix.ECHO | unix.ICANON | unix.ISIG | unix.IEXTEN
+			termios.Iflag |= unix.ICRNL
+			unix.IoctlSetTermios(fd, unix.TCSETS, termios)
+		}
+	}
+}