etc/emacs.bash

   1 ### emacs.bash --- contact/resume an existing Emacs, or start a new one
   2
   3 ## Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
   4 ##   Free Software Foundation, Inc.
   5
   6 ## Author: Noah Friedman
   7
   8 ## This file is part of GNU Emacs.
   9
  10 ## GNU Emacs is free software; you can redistribute it and/or modify
  11 ## it under the terms of the GNU General Public License as published by
  12 ## the Free Software Foundation; either version 3, or (at your option)
  13 ## any later version.
  14
  15 ## GNU Emacs is distributed in the hope that it will be useful,
  16 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ## GNU General Public License for more details.
  19
  20 ## You should have received a copy of the GNU General Public License
  21 ## along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ## Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  23 ## Boston, MA 02110-1301, USA.
  24
  25 ### Commentary:
  26
  27 ## This defines a bash command named `edit' which contacts/resumes an
  28 ## existing emacs or starts a new one if none exists.
  29
  30 ## One way or another, any arguments are passed to emacs to specify files
  31 ## (provided you have loaded `resume.el').
  32
  33 ## This function assumes the emacs program is named `emacs' and is somewhere
  34 ## in your load path.  If either of these is not true, the most portable
  35 ## (and convenient) thing to do is to make an alias called emacs which
  36 ## refers to the real program, e.g.
  37 ##
  38 ##        alias emacs=/usr/local/bin/gemacs
  39
  40 function edit ()
  41 {
  42  local windowsys="${WINDOW_PARENT+sun}"
  43
  44  windowsys="${windowsys:-${DISPLAY+x}}"
  45
  46  if [ -n "${windowsys:+set}" ]; then
  47     # Do not just test if these files are sockets.  On some systems
  48     # ordinary files or fifos are used instead.  Just see if they exist.
  49     if [ -e "${HOME}/.emacs_server" -o -e "/tmp/emacs${UID}/server" ]; then
  50        emacsclient "$@"
  51        return $?
  52     else
  53        echo "edit: starting emacs in background..." 1>&2
  54     fi
  55
  56     case "${windowsys}" in
  57       x ) (emacs "$@" &) ;;
  58       sun ) echo "unsupported window system"; return 1 ;;
  59     esac
  60  else
  61     if jobs %emacs 2> /dev/null ; then
  62        echo "$(pwd)" "$@" >| ${HOME}/.emacs_args && fg %emacs
  63     else
  64        emacs "$@"
  65     fi
  66  fi
  67 }
  68
  69
  70 # arch-tag: 1e1b74b9-bf2c-4b23-870f-9eebff7515cb
  71 ### emacs.bash ends here