#!/bin/sh
#
#    dirs: some dirs needed by all library status scripts
#
#    Copyright (C) 2011-2014 Dustin Kirkland
#
#    Authors: Dustin Kirkland <kirkland@byobu.org>
#
#    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, version 3 of the License.
#
#    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/>.

PKG="byobu"

# Some users build and install byobu themselves, rather than from a distro
[ -r "$HOME/.byoburc" ] && . "$HOME/.byoburc"
[ -n "$BYOBU_PREFIX" ] || BYOBU_PREFIX="/usr"

# Create and export the user configuration directory
# BYOBU_CONFIG_DIR if set, ~/.byobu if it exists, otherwise XDG_CONFIG_HOME/byobu
if [ -z "$BYOBU_CONFIG_DIR" ]; then
	if [ -d "$HOME/.$PKG" ]; then
		export BYOBU_CONFIG_DIR="$HOME/.$PKG"
	else
		_xdg="${XDG_CONFIG_HOME:-"$HOME"/.config}"
		# Spec says XDG_CONFIG_HOME must not be world-readable
		[ -d "$_xdg" ] || mkdir -p -m 700 "$_xdg"
		export BYOBU_CONFIG_DIR="$_xdg/$PKG"
		unset _xdg
	fi
fi
[ -d "$BYOBU_CONFIG_DIR/bin" ] || mkdir -p "$BYOBU_CONFIG_DIR/bin"

# Grab the global, then local socket directory
[ -r "/etc/$PKG/socketdir" ] && . "/etc/$PKG/socketdir"
[ -r "$BYOBU_CONFIG_DIR/socketdir" ] && . "$BYOBU_CONFIG_DIR/socketdir"

# Create and export the runtime cache directory
if [ -w /dev/shm ]; then
	# Use shm for performance, if possible
	for i in /dev/shm/$PKG-$USER-*; do
		if [ -d "$i" ] && [ -O "$i" ]; then
			export BYOBU_RUN_DIR="$i"
			break
		fi
	done
	# Still empty, make a new one
	if [ ! -d "$BYOBU_RUN_DIR" ] || [ ! -O "$BYOBU_RUN_DIR" ]; then
		export BYOBU_RUN_DIR=$(mktemp -d /dev/shm/$PKG-$USER-XXXXXXXX)
	fi
fi
if [ ! -d "$BYOBU_RUN_DIR" ] || [ ! -O "$BYOBU_RUN_DIR" ] || [ ! -w "$BYOBU_RUN_DIR" ]; then
	# For distros that don't have a /dev/shm, use local disk
	if [ -d "$XDG_CACHE_HOME" ]; then
		# Use XDG, as some users insist on such nonsense :-)
		export BYOBU_RUN_DIR="$XDG_CACHE_HOME/$PKG"
	else
		# But if not, we'll use a cache directory
		export BYOBU_RUN_DIR="$HOME/.cache/$PKG"
	fi
fi