#!/bin/sh -e
 
PORT=$(basename $(pwd)|awk -F- '{print $2}')
HAPROXY_PORT=$(basename $(pwd)|awk -F- '{print $3}')
USER=$(id -un)
BASE=$(dirname $(readlink $0))
APP_DIR=$($BASE/readlink_canonical $BASE/app)
 
if [ -e $BASE/nginx ]; then
  NGINX=$BASE/nginx
else
  NGINX=nginx
fi
 
TEMP_BASE_DIR=/var/tmp/${USER}-nginx-${PORT}
if [ ! -d $TEMP_BASE_DIR ]; then
  mkdir -p $TEMP_BASE_DIR;
  chmod og-rwx $TEMP_BASE_DIR;
fi
 
cat <<EOF > nginx.conf
### DO NOT EDIT - THIS IS REGENERATED WHEN NGINX STARTS: SEE $0 ###
daemon off;
 
pid ${TEMP_BASE_DIR}/pid;  # we don't want this, but it's mandatory
 
worker_processes 2;
 
error_log ${APP_DIR}/log/nginx-errors.log;
 
events {
    worker_connections  1024;
}
 
http {
  access_log ${APP_DIR}/log/access.log;
 
  fastcgi_temp_path ${TEMP_BASE_DIR}/fastcgi;
  client_body_temp_path ${TEMP_BASE_DIR}/client-body 1 2;
  proxy_temp_path ${TEMP_BASE_DIR}/proxy;
 
  include       mime.types;
  default_type  application/octet-stream;
 
  sendfile        on;
 
  tcp_nopush     on;
  keepalive_timeout  65;
  tcp_nodelay        on;
 
  gzip  on;
  gzip_min_length  1100;
  gzip_buffers     4 8k;
  gzip_proxied     any;
  gzip_types       text/plain text/html text/xhtml text/css text/js text/csv;
 
  upstream haproxy {
    server 127.0.0.1:$HAPROXY_PORT;
  }
 
  server {
    listen       127.0.0.1:${PORT};
    #server_name  example.com;
 
    root ${APP_DIR}/public;
    index  index.html index.htm;
 
    location / {
      proxy_set_header X-Real-IP       \$remote_addr;
      proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
      proxy_set_header Host            \$http_host;
      proxy_redirect false;
      if (-f \$request_filename/index.html) {
        rewrite (.*) \$1/index.html break;
      }
 
      if (-f \$request_filename.html) {
        rewrite (.*) \$1.html break;
      }
 
      # Can be used by upstream caches (e.g. varnish) if desired
      add_header X-FromFile yes;
      if (!-f \$request_filename) {
        proxy_pass http://haproxy;
        add_header X-FromFile no;
        break;
      }
    }
 
    # For sendfile headers, e.g. "X-Accel-Redirect: /RAILS_ROOT/data/photos/123"
    location /RAILS_ROOT/ {
      internal;
      root ${APP_DIR};
    }
 
    error_page   500 502 503 504  /500.html;
  }
}
EOF
 
exec $NGINX -c nginx.conf || echo "do you need to create the symlink '$BASE/nginx?'"