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#!/bin/sh
# Copyright (C) 2022 Sean Whitton
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# emacsclient(1) wrapper to handle updating the environment of existing
# daemons and choosing between installed and in-tree builds of Emacs.
for arg do
shift
case "$arg" in
'--spw/installed') mode=--spw/installed ;;
'--spw/update-environment') update=true ;;
*) set -- "$@" "$arg" ;;
esac
done
processes=$(ps -o exe -u "$LOGNAME" -U "$LOGNAME")
echo "$processes" | grep -q "$HOME/src/emacs/src/emacs" && devel_running=true
echo "$processes" | grep -q $(command -v emacs) && installed_running=true
if [ "$devel_running" = true -a "$mode" = --spw/installed ]; then
pgrep --full "$HOME/src/emacs/src/emacs" | while read pid; do
kill $pid
done
socket="/run/user/$(id -u)/emacs/server"
[ -e $socket ] && inotifywait -qqt 2 -e delete $socket
devel_running=false
fi
# We check whether there is something which looks like the installed Emacs
# running because we do not want the in-tree emacsclient to try to connect to
# that, and we check whether there is a build in progress and no running
# daemon, as we don't want to start a new daemon until the build is finished.
# The idea is that I can always hit C-i e without worrying about builds.
if [ "$mode" != --spw/installed -a "$installed_running" != true \
-a -e "$HOME/src/emacs/admin/flagfile.melete" \
-a -x "$HOME/src/emacs/lib-src/emacsclient" \
-a -d "/usr/share/emacs-snapshot/site-lisp/elpa" ] \
&& ! ( [ "$devel_running" != true ] && ps h -o pid -C make \
| xargs pwdx | grep -q "$HOME/src/emacs" ); then
emacs="$HOME/src/emacs/src/emacs"
emacsclient="$HOME/src/emacs/lib-src/emacsclient"
else
emacs=$(command -v emacs)
emacsclient=$(PATH=$(echo "$PATH" | sed -e "s#$HOME/src/dotfiles/bin:##") \
command -v emacsclient)
fi
# Update Emacs daemon environment vars for a new interactive session. This
# allows us to have the Emacs daemon survive restarts of the graphical desktop
# environment, and to update Emacs on a remote host when there is a new
# forwarded SSH agent socket. See 'upenv' in .bash_defns.
if [ "$update" = true \
-a \( "$devel_running" = true \
-o "$installed_running" = true \) ]; then
for var in DISPLAY WAYLAND_DISPLAY \
XAUTHORITY WINDOWID \
XDG_SESSION_TYPE XDG_CURRENT_DESKTOP \
SWAYSOCK I3SOCK \
SSH_ASKPASS SSH_CONNECTION \
SSH_AUTH_SOCK SSH_AGENT_PID; do
eval isset=\${$var+x}
if [ "$isset" = "x" ]; then
eval val=\$$var
args="$args"' (setenv "'$var'" "'$val'")'
fi
done
"$emacsclient" --eval "(progn$args (spw/propagate-new-environment))"
fi
# emacsclient(1) requires an argument. As a special case, if there are no
# arguments and no daemon is running, just start one. And if there were no
# arguments but we were requested just to update env vars, exit peacefully.
if [ "$#" -eq 0 \
-a "$devel_running" != true -a "$installed_running" != true ]; then
exec "$emacs" --daemon
elif ! [ "$#" -eq 0 -a "$update" = true ]; then
exec "$emacsclient" -a "" "$@"
fi
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