#!/bin/bash
#
# Syntax:  eml [-h]
#
# Purpose: Runs emacs on the the most recently changed .tex file
#          in the current directory, if it is present; otherwise,
#          the most recently changed file in the current directory
#          is opened with emacs.
#          The -h flag shows the help info for this command.

# Created: Feb  2, 2001       by Bart De Schutter
# Last revised: Aug  1, 2007  by Bart De Schutter
#
# See http://www.deschutter.info/util/scripts.html for the latest version of
# this script.

# Status: public
# Category: emacs

if [  $# -ge 1   -a   "$1" = "-h"  ];
then
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

if [ $# -ne 0 ];
then 
   echo >&2
   echo >&2 "ERROR: ${0##*/} requires no input arguments."
   echo >&2
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

texfile=$( (ls -t *.tex | head -n 1) 2>/dev/null)

if [ -n "$texfile" ];
then
   emacs "$texfile" &
else
   # List directory contents sorted by modification time, filter out
   # directories, select the most recent file, and remove any trailing
   # @ or *.
   lastfile=$( (ls -tF | grep -v '/$' | head -n 1 | 
                sed -e 's/[@*]$//' ) 2>/dev/null)
   if [ -n "$lastfile"  -a  -f "$lastfile" ];
   then
      emacs "$lastfile" &
   else
      echo "No files found."
   fi
fi