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#!/bin/sh
# Copyright (C) 2014-2016 Miquel Sabaté Solà <mikisabate@gmail.com>
#
# 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/>.
# Launch a background job that deals with SASS/SCSS.
#
# If no arguments were given, then it will try to kill a previous instance
# of the background job and launch another one. You can prevent the
# re-launching by passing the "stop" argument. This way, this script will
# efectively kill the currently running process and quit. Any other argument
# will be ignored.
#
# Therefore, the usage of this script is as follows:
#
# $ sass [stop]
#
##
# Config values.
#
# NOTE: path values should *not* start and/or end with a slash.
# The base directory.
dir="$( cd "$( dirname "$0" )" && pwd )/.."
# The absolute path to the directory where we can store temporary files. You
# don't really want to use this default since it can easily clash with other
# projects ;)
tmp="/tmp"
# The absolute path to the file that will store the PID of the currently
# running background job.
pidfile="$tmp/assets.pid"
# The absolute path to the SASS log.
csslog="$tmp/sass.log"
# The absolute path of the directory containing the SASS files.
cssdir="$dir/public/stylesheets"
##
# And here starts the script itself.
# Get pidfile.
mkdir -p $tmp
touch $pidfile
# Kill off old processes
while read pid; do
kill $pid > /dev/null 2>&1;
done < $pidfile
# Truncate the PID file
> $pidfile
# If the user just wanted to stop all old processes, then exit here.
if [[ $1 == "stop" ]]; then
exit 1
fi
# SASS
sass --watch "$cssdir" > $csslog 2>&1 &
echo $! >> $pidfile
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