#!/bin/bash
set -e

# Get the maximum upload file size for Nginx, default to 0: unlimited
USE_NGINX_MAX_UPLOAD=${NGINX_MAX_UPLOAD:-0}
# Generate Nginx config for maximum upload file size
echo "client_max_body_size $USE_NGINX_MAX_UPLOAD;" > /etc/nginx/conf.d/upload.conf

# Get the number of workers for Nginx, default to 1
USE_NGINX_WORKER_PROCESSES=${NGINX_WORKER_PROCESSES:-1}
# Modify the number of worker processes in Nginx config
sed -i "/worker_processes\s/c\worker_processes ${USE_NGINX_WORKER_PROCESSES};" /etc/nginx/nginx.conf

# Set the max number of connections per worker for Nginx, if requested
# Cannot exceed worker_rlimit_nofile, see NGINX_WORKER_OPEN_FILES below
if [[ -v NGINX_WORKER_CONNECTIONS ]] ; then
    sed -i "/worker_connections\s/c\    worker_connections ${NGINX_WORKER_CONNECTIONS};" /etc/nginx/nginx.conf
fi

# Set the max number of open file descriptors for Nginx workers, if requested
if [[ -v NGINX_WORKER_OPEN_FILES ]] ; then
    echo "worker_rlimit_nofile ${NGINX_WORKER_OPEN_FILES};" >> /etc/nginx/nginx.conf
fi

# Get the listen port for Nginx, default to 80
USE_LISTEN_PORT=${LISTEN_PORT:-80}
# Modify Nignx config for listen port
if ! grep -q "listen ${USE_LISTEN_PORT};" /etc/nginx/conf.d/nginx.conf ; then
    sed -i -e "/server {/a\    listen ${USE_LISTEN_PORT};" /etc/nginx/conf.d/nginx.conf
fi
exec "$@"
