Windows: terminal color coding doesn't work under cmd.exe

[dangthill]

When running under cmd.exe (CPython 2.7.2 on Windows XP 64), the color escape codes aren't interpreted and make debug output rather messy. I ended up just commenting out:

#if color in _colors:
#    msg = '%s%s%s' % ("\x1b["+_colors[color]+(";1" if bold else "")+"m", msg, "\x1b[0m")

in ui.py to get going. I'm not aware of the coding necessary for cmd.exe, so perhaps it's easiest to just check the SHELL environment variable or os.name and disable it.

[tonyduckles]

Interesting. I could've sworn that back in the MS-DOS days the command prompt fully supported the ANSI escape sequences. Based on some quick searching, it sounds like that's no longer the case:
http://stackoverflow.com/questions/6532295/ansi-escape-sequences-not-working-in-windows-cmd-prompt

I'll probably conditionalize this based on os.name, like some other OS-specific handling in shell.py.

[tonyduckles]

Fixed in f1919fc.