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, 2008
   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 of the License, or
  13 ## (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ### Commentary:
  24
  25 ## This defines a bash command named `edit' which contacts/resumes an
  26 ## existing emacs or starts a new one if none exists.
  27
  28 ## One way or another, any arguments are passed to emacs to specify files
  29 ## (provided you have loaded `resume.el').
  30
  31 ## This function assumes the emacs program is named `emacs' and is somewhere
  32 ## in your load path.  If either of these is not true, the most portable
  33 ## (and convenient) thing to do is to make an alias called emacs which
  34 ## refers to the real program, e.g.
  35 ##
  36 ##        alias emacs=/usr/local/bin/gemacs
  37
  38 function edit ()
  39 {
  40  local windowsys="${WINDOW_PARENT+sun}"
  41
  42  windowsys="${windowsys:-${DISPLAY+x}}"
  43
  44  if [ -n "${windowsys:+set}" ]; then
  45     # Do not just test if these files are sockets.  On some systems
  46     # ordinary files or fifos are used instead.  Just see if they exist.
  47     if [ -e "${HOME}/.emacs_server" -o -e "/tmp/emacs${UID}/server" ]; then
  48        emacsclient "$@"
  49        return $?
  50     else
  51        echo "edit: starting emacs in background..." 1>&2
  52     fi
  53
  54     case "${windowsys}" in
  55       x ) (emacs "$@" &) ;;
  56       sun ) echo "unsupported window system"; return 1 ;;
  57     esac
  58  else
  59     if jobs %emacs 2> /dev/null ; then
  60        echo "$(pwd)" "$@" >| ${HOME}/.emacs_args && fg %emacs
  61     else
  62        emacs "$@"
  63     fi
  64  fi
  65 }
  66
  67
  68 # arch-tag: 1e1b74b9-bf2c-4b23-870f-9eebff7515cb
  69 ### emacs.bash ends here