# HG changeset patch
# User Sean Farley <sean@farley.io>
# Date 2015-12-16 18:33:19
# Node ID 7cc654610204bc495d8082e8d52180e87b0097ae
# Parent  707cdf2c370093601865bc4a489fbc3e1b167aa0

crecord: use try/except for import of curses

Not only does this improve fragility with 'if os.name == ...' it will help
future patches enable the behavior to fallback to use plain record when curses
is unavailable (e.g. python compiled without curses support).

diff --git a/mercurial/crecord.py b/mercurial/crecord.py
--- a/mercurial/crecord.py
+++ b/mercurial/crecord.py
@@ -30,15 +30,18 @@ from . import (
 # locale encoding correctly.  --immerrr
 locale.setlocale(locale.LC_ALL, '')
 
-# os.name is one of: 'posix', 'nt', 'dos', 'os2', 'mac', or 'ce'
-if os.name == 'posix':
+try:
     import curses
     import fcntl
     import termios
-else:
+    curses.error
+    fcntl.ioctl
+    termios.TIOCGWINSZ
+except ImportError:
     # I have no idea if wcurses works with crecord...
     try:
         import wcurses as curses
+        curses.error
     except ImportError:
         # wcurses is not shipped on Windows by default
         pass