prepare new user and config file for nginx

prepare_nginx_app.sh

#!/bash/bin

if [ $# != 2 ]; then
    echo "usage: $0 app_name app_port" 1>&2
    exit 0
fi

app_name=$1
port=$2

echo "checking the port"

port_used=`lsof -iTCP:${port} | wc -c`

if [ $port_used -ne 0 ]; then
    echo "the port is already used"
    exit 1
fi

echo "checking the user"

user_exists=false
getent passwd $app_name >/dev/null 2>&1 && user_exists=true

if $user_exists; then
    echo "this user already exists"
    exit 1
fi

echo "preparing user for the site"

useradd $app_name
gpasswd -a nginx $app_name

echo "preparing setting for nginx"

nginx_conf="/opt/nginx/conf"

cp $nginx_conf/rails_template.conf $nginx_conf/$app_name.conf

sed -i -E "s/\\\$PORT/${port}/" $nginx_conf/$app_name.conf
sed -i -E "s/\\\$APP_HOME/${app_name}\/${app_name}\/public/" $nginx_conf/$app_name.conf

sed -i -E "s/(#app_conf_setting)/\1\n    include    ${app_name}.conf;/" /opt/nginx/conf/nginx.conf

service nginx restart

echo 1>&2
exit 1
?