Re: [E-devel] Entrance patch to for obtaining system sessions list

[Morten Nilsen]

Morten Nilsen wrote:
If I understand correctly, this patch was written for Slackware? If so I
can't take it...what we would want is a script that at least covers most
of the major distros (Debian, Mandriva, Fedora, Ubuntu, Gentoo,
Slackware) and understands how each of them stores X sessions. For
example, Mandriva does not use .desktop files to store sessions - it
keeps entries under /etc/X11/wmsession.d/. This is probably much better
done as a script that determines the system's linux distribution,
obtains the X sessions accordingly, and outputs a session list that can
then be compiled into the configuration at build time.

I see your point..

I'll see what I can do in the scripting department.. at least for a bare 
bones script that handles the .desktop way as a start .. people on 
systems that actually have different methods would have to pitch in :)


Here's a basic skeleton script.. running it produces (on my system);
E16:starte16:enlightenment.png
Enlightenment:/usr/bin/enlightenment:enlightenment.png

which is pretty much just taken verbatim from the .desktops, only an 
icon has been guessed for "Enlightenment" (a file that exists)

There's a ton of improvements one could do, but I'd like to just put 
this basic implementation out there for people to start poking at with 
sticks :)

--
Morten
:wq
#!/bin/bash
# Session lister originally written by Morten Nilsen <[EMAIL PROTECTED]>
# This code is covered by entrance's license

## Function declarations

function desktop_parse
{
   awk -F= '
     BEGIN{ type=""; session=""; icon=""; name=""; valid = 0; }

     $0=="[Desktop Entry]"{ valid = 1; next; } 

     $1=="Type"{    type    = $2; next; }
     $1=="Name"{    name    = $2; next; } 
     $1=="Icon"{    icon    = $2; next; } 
     $1=="Exec"{    session = $2; next; }
     $1=="TryExec"{ session = $2; next; }
     { next; }

     END{
           if(type == "XSession")
             printf("%s:%s:%s\n", name, session, icon);
        }
   ' $1
}

function guess_icon
{
   if [ "x$1" == "x" ]; then
     return;
   fi

   guess=`basename $1 | tr A-Z a-z`
   for icondir in /usr/share/pixmaps /usr/share/entrance/images/sessions; do
     for ext in png jpg; do
        if [ -f "${icondir}/${guess}.${ext}" ]; then
           echo "${guess}.${ext}";
           return;
        fi
     done
   done
}

function session_parse
{
      name=`echo $1 | awk -F: '{print $1}'`;
   session=`echo $1 | awk -F: '{print $2}'`;
      icon=`echo $1 | awk -F: '{print $3}'`;

   if [ "x$session" == "x" ]; then
     return;
   fi

   # Guess an icon
   if [ "x$icon" == "x" ]; then
     icon=`guess_icon $name`
     if [ "x$icon" == "x" ]; then
        icon=`guess_icon $session`
     fi
   fi

   # if no name is given, use lowercased session entry
   if [ "x$name" == "x" ]; then
     name=`basename $session | tr A-Z a-z`
   fi

   echo "$name:$session:$icon"
}

## Session list builder

sessions=""

## parse xsession .desktop files
if [ -d /usr/share/xsessions ]; then
   for desktop in /usr/share/xsessions/*.desktop; do
     sessions="${sessions} `desktop_parse $desktop`";
   done
fi

## TODO Implement other parsers here, 
## and associated functions above as needed

## Final step, prints out NAME:SESSION:ICON\n
for session in $sessions; do
   session_parse $session;
done