Update nn

Direct input into Y/N questions

bin/nn

@@ -6,6 +6,8 @@ import re
 import shutil
 import subprocess
 import sys
+import termios
+import tty
 from datetime import datetime
 from pathlib import Path
 
@@ -273,13 +275,23 @@ def apply_renames(plan):
 
 
 def confirm(prompt='Apply renames? [y/n] '):
-    """Ask the user for confirmation."""
-    while True:
-        answer = input(prompt).strip().lower()
-        if answer == 'y':
-            return True
-        if answer == 'n':
-            return False
+    """Ask the user for confirmation, reacting to a single keypress."""
+    print(prompt, end='', flush=True)
+    if not sys.stdin.isatty():
+        return sys.stdin.read(1).strip().lower() == 'y'
+
+    fd = sys.stdin.fileno()
+    old_settings = termios.tcgetattr(fd)
+    try:
+        # cbreak (not raw) keeps Ctrl-C as SIGINT and newlines well behaved.
+        tty.setcbreak(fd)
+        while (key := sys.stdin.read(1).lower()) not in ('y', 'n', ''):
+            pass
+    finally:
+        termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+
+    print(key)
+    return key == 'y'
 
 
 def main():
@@ -337,4 +349,8 @@ def main():
 
 
 if __name__ == '__main__':
-    main()
+    try:
+        main()
+    except KeyboardInterrupt:
+        print('\nAborted.')
+        sys.exit(1)