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#!/bin/sh
#
# Copyright (C) 2020 Kevin J. McCarthy <kevin@8t8.us>
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# Invoke a background edit session in a new GNU Screen or tmux window.
#
# This script is derived from Aaron Schrab's tmuxwait script, posted to
# mutt-dev at
# <http://lists.mutt.org/pipermail/mutt-dev/Week-of-Mon-20200406/000591.html>.
#
# If you run mutt inside screen or tmux, add to your muttrc:
# set background_edit
# set editor = '/path/to/bgedit-screen-tmux.sh [youreditor]'
#
# It may also be useful to modify something like contrib/bgedit-detectgui.sh
# to look for the $STY or $TMUX environment variables and set those
# configuration variables appropriately.
#
set -e
if [ "$#" -lt 2 ]; then
echo "Usage: $0 editor tempfile" >&2
exit 1
fi
editor=$1
shift
tmpdir=$(mktemp -d)
trap 'rm -rf "$tmpdir"' EXIT INT QUIT
mkfifo "$tmpdir/status"
cat >"$tmpdir/run" <<END_SCRIPT
exitval=1
trap 'echo \$exitval > "$tmpdir/status"' EXIT INT QUIT
$editor "\$@"
exitval=\$?
END_SCRIPT
if test x$STY != x; then
screen -X screen /bin/sh "$tmpdir/run" "$@"
elif test x$TMUX != x; then
tmux neww /bin/sh "$tmpdir/run" "$@"
else
echo "Not running inside a terminal emulator" >&2
exit 1
fi
read exitval <"$tmpdir/status"
exit "$exitval"
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