[matplotlib-devel] ghostscript version fix

Hi all,

I just installed mpl on ubuntu gutsy, and got errors after setting
text.usetex  :  True and ps.usedistiller  :  ghostscript. The problem seems
to be in checkdep_ghostscript() in __init__.py, specifically the command 'gs
-v' (should be replaced by 'gs --version').
For my system I get:
$ gs -v
GPL Ghostscript SVN PRE-RELEASE 8.61 (2007-08-02)
Copyright (C) 2007 Artifex Software, Inc.  All rights reserved.

and:
$ gs --version
8.61

Below I give a modified version of checkdep_ghostscript() that should work
for all version of ghostscript.

Cheers,
Ralf



def checkdep_ghostscript():
    try:
        if sys.platform == 'win32':
            command = 'gswin32c -v'
        else:
            command = 'gs --version'
        stdin, stdout = os.popen4(command)
        line = stdout.readlines()[0]
    vtest = '.'.join(line.split('.')[:2]) # deal with version numbers like '
7.07.1'
    float(vtest)
        return vtest
    except (IndexError, ValueError):
        return None