add tty module to color text

pkgs/clan-cli/clan_cli/tty.py

@@ -0,0 +1,25 @@
+import sys
+from typing import IO, Any, Callable
+
+
+def is_interactive() -> bool:
+    """Returns true if the current process is interactive"""
+    return sys.stdin.isatty() and sys.stdout.isatty()
+
+
+def color_text(code: int, file: IO[Any] = sys.stdout) -> Callable[[str], None]:
+    """
+    Print with color if stderr is a tty
+    """
+
+    def wrapper(text: str) -> None:
+        if file.isatty():
+            print(f"\x1b[{code}m{text}\x1b[0m", file=file)
+        else:
+            print(text, file=file)
+
+    return wrapper
+
+
+warn = color_text(91, file=sys.stderr)
+info = color_text(92, file=sys.stderr)