[PATCH] Allow specifying multiple 2 or 3 way file comparison in command line

["Alexandre BERDERY" <mail_lists berdery com>]

Hi,

And first of all, congratulations to meld developpers. I'm certainly not the first one to thanks for this very useful but neither the last.

I was looking at the possibility to allow either multiple file 2 way file comparison OR multiple 3 way file comparison in command line. 
For me it was a very useful feature when using meld to compute standard output of a configuration management list of files for example
Looking at your mailing list archive I saw "[PATCH] Allow specifying > 2 files at command line" on the 5th of April but it wasn't giving the possibility for 3.

Anyway, it showed me the handling of args wasn't so difficult even for a "totally non Python developper" like me.
Thanks for that.

So, here's my 1st dirty Python "dev" in meldapp.py
 (from meld 1.1.4): 
832,835c832,833
<     -h, --help      Show this help text and exit
<     -v, --version   Display the version and exit
<     -d, --double   For multiple 2 way file/dir comparison (require a %2 num of files as arg)
<     -t, --triple      For multiple 3 way file/dir comparison (require a %3 num of files as arg)
---
>     -h, --help                  Show this help text and exit
>     -v, --version               Display the version and exit
872,891c870
<     if "-d" in args or "--double" in args:
<       if (len(args)-1) % 2 == 0:
<          i = 1
<          while i < len(args):
<               app.append_diff
([args[i], args[i+1]])
<               i = i + 2
<       else:
<          app.usage( _("Wrong number of arguments (Got %i)") % (len(args)-1))
<
<     elif "-t" in args or "--triple" in args:
<       if (len(args)-1) % 3 == 0:
<          i = 1
<          while i < len(args):
<               app.append_diff([args[i], args[i+1], args[i+2]])
<               i = i + 3
<       else:
<          app.usage( _("Wrong number of arguments (Got %i)") % (len(args)-1))
<
<
<     elif len(args) == 0:
---
>     if len(args) == 0:

Regards.

Alexandre