bzr doesn't detect correct terminal width

A good workaround for the moment is to just

 export COLUMNS

<Kamion> mpool: the way I get the terminal width in C without relying on COLUMNS being exported is approximately

'struct winsize wsz;
if
               (!ioctl(fileno(stdin), TIOCGWINSZ, &wsz) && wsz.ws_col) line_length = wsz.ws_col;'

Kamions fix looks useful, just need to turn it into python.

Looks like it can be done using fcntl.ioctl and termios.TIOCGWINSZ without needing a C extension.

 From: <email address hidden>
 Subject: [PATCH] obtain terminal_width via curses
 Date: 25 April 2006 8:24:57 AM
 To: <email address hidden>

The attached patch modifies "bzr log --log-format line" to
use the actual terminal width instead of a hard coded 79.

Further osutils.py:terminal_width() is modified to use the
curses module to get the current terminal width.

In order to avoid flickering due to subsequent calls to
curses.initsrc(), the width is saved in a global variable.
It should not change the line buffering of stdout, but still
seems to do it on my terminal/curses/python combination for
the output of "bzr log ..."

Here is the code I use in Smart PM:

def get_screen_width():
    s = struct.pack('HHHH', 0, 0, 0, 0)
    try:
        x = fcntl.ioctl(1, termios.TIOCGWINSZ, s)
    except IOError:
        return 80
    return struct.unpack('HHHH', x)[1]

I'm not sure exactly when this was fixed, but at least the test suite uses the real terminal width.