#!/bin/bash
#
# Use this automated bash script to install Ghost blog on Ubuntu, Debian or CentOS,
# with Nginx (as a reverse proxy) and Naxsi web application firewall.
#
# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC!
#
# Copyright (C) 2015-2018 Lin Song <linsongui@gmail.com>
# Based on the work of Herman Stevens (Copyright 2013)
#
# 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/.

max_blogs=10

export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

echoerr() { echo "Error: $1" >&2; }

ghost_blog_install() {

# Check operating system
os_type="$(lsb_release -si 2>/dev/null)"
os_vers="$(lsb_release -sr 2>/dev/null)"
if [ -z "$os_type" ]; then
  [ -f /etc/os-release  ] && os_type="$(. /etc/os-release  && printf '%s' "$ID")"
  [ -f /etc/os-release  ] && os_vers="$(. /etc/os-release  && printf '%s' "$VERSION_ID")"
  [ -f /etc/lsb-release ] && os_type="$(. /etc/lsb-release && printf '%s' "$DISTRIB_ID")"
  [ -f /etc/lsb-release ] && os_vers="$(. /etc/lsb-release && printf '%s' "$DISTRIB_RELEASE")"
  [ "$os_type" = "debian" ] && os_type=Debian
  [ "$os_type" = "ubuntu" ] && os_type=Ubuntu
fi
if [ "$os_type" = "Ubuntu" ]; then
  if [ "$os_vers" != "16.04" ] && [ "$os_vers" != "14.04" ]; then
    echoerr "This script only supports Ubuntu 16.04 and 14.04."
    exit 1
  fi
elif [ "$os_type" = "Debian" ]; then
  os_vers="$(sed 's/\..*//' /etc/debian_version 2>/dev/null)"
  if [ "$os_vers" != "8" ] && [ "$os_vers" != "9" ]; then
    echoerr "This script only supports Debian 9 and 8."
    exit 1
  fi
else
  if [ ! -f /etc/redhat-release ]; then
    echoerr "This script only supports Ubuntu, Debian and CentOS."
    exit 1
  elif ! grep -qs -e "release 6" -e "release 7" /etc/redhat-release; then
    echoerr "This script only supports CentOS 7 and 6."
    exit 1
  fi
  os_type="CentOS"
fi

# Check for root permission
if [ "$(id -u)" != 0 ]; then
  echoerr "Script must be run as root. Try 'sudo bash $0'"
  exit 1
fi

# Check if the server has enough RAM
phymem="$(free | awk '/^Mem:/{print $2}')"
[ -z "$phymem" ] && phymem=0
if [ "$phymem" -lt 500000 ]; then
  echoerr "A minimum of 512 MB RAM is required for Ghost blog install."
  exit 1
fi

# Check for valid blog domain name (FQDN)
if [ "$1" = "" ] || [ "$1" = "BLOG_FULL_DOMAIN_NAME" ]; then
  script_name=$(basename "$0")
  echo "Usage: bash $script_name BLOG_FULL_DOMAIN_NAME (Replace with actual value)"
  exit 1
fi

FQDN_REGEX='^([a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$'
if ! printf %s "$1" | grep -Eq "$FQDN_REGEX"; then
  echoerr "Invalid parameter. You must enter a fully qualified domain name (FQDN)."
  exit 1
fi

if id -u "ghost$max_blogs" >/dev/null 2>&1; then
  echoerr "Maximum number of Ghost blogs ($max_blogs) reached."
  exit 1
fi

ghost_num=1
ghost_user=ghost
ghost_port=2368

if id -u ghost >/dev/null 2>&1; then
  echo 'It looks like this server already has Ghost blog installed! '
  if [ -d "/var/www/$1" ]; then
    echo
    echo "To install additional blogs, you must use a new full domain name."
    exit 1
  fi
  
  for count in $(seq 2 $max_blogs); do
    if ! id -u "ghost$count" >/dev/null 2>&1; then
      ghost_num="$count"
      ghost_user="ghost$count"
      ghost_port=$((ghost_port+count))
      ghost_port=$((ghost_port-1))
      break
    fi
  done
  
  echo
  read -r -p "Install another Ghost blog on this server? [y/N] " response
  case $response in
    [yY][eE][sS]|[yY])
      echo
      ;;
    *)
      echo "Aborting."
      exit 1
      ;;
  esac
  
  phymem_req=250
  phymem_req1=$((phymem_req*ghost_num))
  phymem_req2=$((phymem_req*ghost_num*1000))
  
  if [ "$phymem" -lt "$phymem_req2" ]; then
    echo "This server might not have enough RAM to install another Ghost blog."
    echo "It is estimated that at least $phymem_req1 MB total RAM is required."
    echo
    echo 'WARNING! If you continue, the install could fail and your blog will NOT work!'
    echo
    read -r -p "Do you REALLY want to continue (at your own risk)? [y/N] " response
    case $response in
      [yY][eE][sS]|[yY])
        echo
        ;;
      *)
        echo "Aborting."
        exit 1
        ;;
    esac
    
  fi
fi

clear

cat <<EOF
Welcome! This script will install Ghost blog version 0.11.14
on your server, with Nginx (as a reverse proxy) and Naxsi WAF.

The full domain name for your new blog is:

>> $1 <<

Please double check. This MUST be correct for it to work!

IMPORTANT: DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC!

It should only be used on a virtual private server (VPS) or dedicated server,
with *freshly installed* Ubuntu 16.04/14.04, Debian 9/8 or CentOS 7/6.

EOF

read -r -p "Confirm and proceed with the install? [y/N] " response
case $response in
  [yY][eE][sS]|[yY])
    echo
    echo "Please be patient. Setup is continuing..."
    echo
    ;;
  *)
    echo "Aborting."
    exit 1
    ;;
esac

BLOG_FQDN=$1

# Create and change to working dir
mkdir -p /opt/src
cd /opt/src || exit 1

if [ "$os_type" = "CentOS" ]; then

  # Add the EPEL repository
  yum -y install epel-release || { echoerr "Cannot add EPEL repo."; exit 1; }

  # We need some more software
  yum --enablerepo=epel -y install unzip fail2ban gcc gcc-c++ make openssl-devel \
    wget curl sudo libxml2-devel curl-devel httpd-devel pcre-devel \
    || { echoerr "'yum install' failed."; exit 1; }

  # Create basic Fail2Ban rules
  if [ ! -f /etc/fail2ban/jail.local ] ; then
cat > /etc/fail2ban/jail.local <<'EOF'
[ssh-iptables]
enabled  = true
filter   = sshd
action   = iptables[name=SSH, port=ssh, protocol=tcp]
logpath  = /var/log/secure
EOF
  fi

else

  # Update package index
  export DEBIAN_FRONTEND=noninteractive
  apt-get -yq update || { echoerr "'apt-get update' failed."; exit 1; }

  # We need some more software
  apt-get -yq install unzip fail2ban \
    build-essential apache2-dev libxml2-dev wget curl sudo \
    libcurl4-openssl-dev libpcre3-dev libssl-dev zlib1g-dev \
    || { echoerr "'apt-get install' failed."; exit 1; }

fi

# Insert required IPTables rules
if ! iptables -C INPUT -p tcp --dport 80 -j ACCEPT 2>/dev/null; then
  iptables -I INPUT -p tcp --dport 80 -j ACCEPT
fi
if ! iptables -C INPUT -p tcp --dport 443 -j ACCEPT 2>/dev/null; then
  iptables -I INPUT -p tcp --dport 443 -j ACCEPT
fi

# Start Fail2ban
service fail2ban stop >/dev/null 2>&1
service fail2ban start

# Insert IPTables rules on boot
if ! grep -qs "ghost blog setup script" /etc/rc.local; then
  if [ -f /etc/rc.local ]; then
    if [ "$os_type" != "CentOS" ]; then
      sed --follow-symlinks -i -e '/^exit 0/d' /etc/rc.local
    fi
  else
    echo '#!/bin/sh' > /etc/rc.local
  fi
cat >> /etc/rc.local <<'EOF'

# Added by ghost blog setup script
(sleep 15
iptables -I INPUT -p tcp --dport 80 -j ACCEPT
iptables -I INPUT -p tcp --dport 443 -j ACCEPT
service fail2ban restart)&
EOF
  if [ "$os_type" != "CentOS" ]; then
    echo "exit 0" >> /etc/rc.local
  fi
  chmod +x /etc/rc.local
fi

# Next, we need to install Node.js.
# Ref: https://github.com/nodesource/distributions
if [ "$ghost_num" = "1" ] || [ ! -f /usr/bin/node ]; then
  if [ "$os_type" = "CentOS" ]; then
    curl -sL https://rpm.nodesource.com/setup_6.x | bash -
    sed -i '/gpgkey/a exclude=nodejs' /etc/yum.repos.d/epel.repo
    yum -y --disablerepo=epel install nodejs || { echoerr "Failed to install 'nodejs'."; exit 1; }
  else
    curl -sL https://deb.nodesource.com/setup_6.x | bash -
    apt-get -yq install nodejs || { echoerr "Failed to install 'nodejs'."; exit 1; }
  fi
fi

# To keep your Ghost blog running, install "forever".
npm install forever -g

# Create a user to run Ghost:
mkdir -p /var/www
useradd -d "/var/www/$BLOG_FQDN" -m -s /bin/false "$ghost_user"

# Stop running Ghost blog processes, if any.
su - "$ghost_user" -s /bin/bash -c "forever stopall"

# Create temporary swap file to prevent out of memory errors during install
# Do not create if OpenVZ VPS
swap_tmp="/tmp/swapfile_temp.tmp"
if [ ! -f /proc/user_beancounters ]; then
  echo
  echo "Creating temporary swap file, please wait ..."
  echo
  dd if=/dev/zero of="$swap_tmp" bs=1M count=512 2>/dev/null || /bin/rm -f "$swap_tmp"
  chmod 600 "$swap_tmp" && mkswap "$swap_tmp" &>/dev/null && swapon "$swap_tmp"
fi

# Switch to Ghost blog user. We use a "here document" to run multiple commands as this user.
cd "/var/www/$BLOG_FQDN" || exit 1
sudo -u "$ghost_user" BLOG_FQDN="$BLOG_FQDN" ghost_num="$ghost_num" ghost_port="$ghost_port" HOME="/var/www/$BLOG_FQDN" /bin/bash <<'SU_END'

# Get the Ghost blog source, unzip and install.
ghost_url="https://github.com/TryGhost/Ghost/releases/download/0.11.14/Ghost-0.11.14.zip"
if ! wget -t 3 -T 30 -nv -O ghost-latest.zip "$ghost_url"; then
  echo "Error: Cannot download Ghost blog source." >&2
  exit 1
fi
unzip -o -qq ghost-latest.zip && /bin/rm -f ghost-latest.zip
# Fix for https://github.com/TryGhost/Ghost/issues/10244
sed -i -e '1322s/5\.1\.2/5.1.3/' -e '1324s/5\.1\.2/5.1.3/' npm-shrinkwrap.json
npm install --production

# Generate config file and make sure that Ghost uses your actual domain name
/bin/cp -f config.js config.js.old 2>/dev/null
sed "s/my-ghost-blog.com/$BLOG_FQDN/" <config.example.js >config.js
sed -i "s/port: '2368'/port: '$ghost_port'/" config.js

# We need to make certain that Ghost will start automatically after a reboot
cat > starter.sh <<'EOF'
#!/bin/sh
pgrep -u ghost -f "/usr/bin/node" >/dev/null
if [ $? -ne 0 ]; then
  export PATH=/usr/local/bin:$PATH
  export NODE_ENV=production
  NODE_ENV=production forever start --sourceDir /var/www/YOUR.DOMAIN.NAME index.js >> /var/log/nodelog.txt 2>&1
else
  echo "Already running!"
fi
EOF

# Replace placeholder with your actual domain name:
sed -i "s/YOUR.DOMAIN.NAME/$BLOG_FQDN/" starter.sh

if [ "$ghost_num" != "1" ]; then
  sed -i "/^pgrep/s/ghost/ghost$ghost_num/" starter.sh
  sed -i "s/nodelog\.txt/nodelog$ghost_num.txt/" starter.sh
fi

# Make the script executable with:
chmod +x starter.sh

# We use crontab to start this script after a reboot:
crontab -r 2>/dev/null
crontab -l 2>/dev/null | { cat; echo "@reboot /var/www/$BLOG_FQDN/starter.sh"; } | crontab -

SU_END

# Remove temporary swap file
[ -f "$swap_tmp" ] && swapoff "$swap_tmp" && /bin/rm -f "$swap_tmp"

# Check if Ghost blog download was successful
[ ! -f "/var/www/$BLOG_FQDN/index.js" ] && exit 1

# Create the logfile:
if [ "$ghost_num" = "1" ]; then
  touch /var/log/nodelog.txt
  chown ghost.ghost /var/log/nodelog.txt
else
  touch "/var/log/nodelog$ghost_num.txt"
  chown "ghost$ghost_num.ghost$ghost_num" "/var/log/nodelog$ghost_num.txt"
fi

if [ "$ghost_num" = "1" ] || [ ! -f /opt/nginx/sbin/nginx ]; then
  
  # Download and extract Naxsi:
  cd /opt/src || exit 1
  wget -t 3 -T 30 -qO- https://github.com/nbs-system/naxsi/archive/0.55.3.tar.gz | tar xz
  [ ! -d naxsi-0.55.3 ] && { echoerr "Cannot download Naxsi source."; exit 1; }
  
  # Ref: https://github.com/nbs-system/naxsi/commit/c7e8cff427eaf6b6ece1b0b1c8ddaba11bb21d45
  sed -i -e 's/127\.0\.0\.1:443/127.0.0.1:9200/' -e '/use_ssl/s/"True"/false/' naxsi-0.55.3/nxapi/nxapi.json
  
  # Next we create a user for nginx:
  if [ "$os_type" != "CentOS" ]; then
    adduser --system --no-create-home --disabled-login --disabled-password --group nginx
  else
    useradd --system --no-create-home -s /bin/false -U nginx
  fi
  
  # Download and compile Nginx:
  cd /opt/src || exit 1
  wget -t 3 -T 30 -qO- https://nginx.org/download/nginx-1.14.2.tar.gz | tar xz
  [ ! -d nginx-1.14.2 ] && { echoerr "Cannot download Nginx source."; exit 1; }
  cd nginx-1.14.2 || exit 1
  ./configure --add-module=../naxsi-0.55.3/naxsi_src/ \
  --prefix=/opt/nginx --user=nginx --group=nginx \
  --with-http_ssl_module --with-http_v2_module --with-http_realip_module
  make -s && make -s install
  
  # Add Naxsi core rules
  mkdir -p /etc/nginx
  /bin/cp -f /opt/src/naxsi-0.55.3/naxsi_config/naxsi_core.rules /etc/nginx/
  
  # Add Naxsi whitelist rules needed for Ghost blog.
  # Ref: https://github.com/nbs-system/naxsi/wiki/whitelists
  
cat > /etc/nginx/mysite.rules <<'EOF'
#LearningMode; #Enables learning mode
SecRulesEnabled;
#SecRulesDisabled;
DeniedUrl "/RequestDenied";
## check rules
CheckRule "$SQL >= 8" BLOCK;
CheckRule "$RFI >= 8" BLOCK;
CheckRule "$TRAVERSAL >= 4" BLOCK;
CheckRule "$EVADE >= 4" BLOCK;
CheckRule "$XSS >= 8" BLOCK;
BasicRule  wl:1000 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/users/([0-9]+/)?$|BODY|NAME";
BasicRule  wl:1000 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/posts/([0-9]+/)?$|BODY|NAME";
BasicRule  wl:1000 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/tags/([0-9]+/)?$|BODY|NAME";
BasicRule  wl:1000,1001,1007,1008,1009,1010,1011,1013,1015 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/posts/([0-9]+/)?$|BODY";
BasicRule  wl:1016,1100,1101,1205,1302,1303,1310,1311,1314 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/posts/([0-9]+/)?$|BODY";
BasicRule  wl:1000,1001,1007,1008,1009,1010,1011,1013,1015 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/posts/([0-9]+/)?$|$BODY_VAR_X:^markdown$";
BasicRule  wl:1016,1100,1101,1205,1302,1303,1310,1311,1314 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/posts/([0-9]+/)?$|$BODY_VAR_X:^markdown$";
BasicRule  wl:1015 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/posts/$|ARGS";
BasicRule  wl:1015 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/posts/$|$ARGS_VAR_X:^type$";
BasicRule  wl:1015 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/settings/$|ARGS";
BasicRule  wl:1015 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/settings/$|$ARGS_VAR_X:^type$";
BasicRule  wl:1310,1311 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/users/password/$|BODY|NAME";
BasicRule  wl:1310,1311 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/authentication/setup/$|BODY|NAME";
BasicRule  wl:1310,1311 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/authentication/passwordreset/$|BODY|NAME";
BasicRule  wl:1001,1015,1205,1302,1303,1310,1311 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/settings/$|BODY";
BasicRule  wl:1001,1015,1205,1302,1303,1310,1311 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/settings/$|$BODY_VAR_X:^value$";
BasicRule  wl:16 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/mail/test/$|BODY";
BasicRule  wl:2 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/uploads/$|BODY";
BasicRule  wl:15,1101 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/settings/$|BODY";
BasicRule  wl:1010,1011 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/slugs/post/\(Untitled\)/$|URL";
BasicRule  wl:0 "mz:$URL_X:^/ghost/api/v[0-9]+\.[0-9]+/users/password/$|BODY";
EOF
  
  # Set up NXAPI (Naxsi log parser, whitelist & report generator)
  # Ref: https://github.com/nbs-system/naxsi/tree/master/nxapi
  cd /opt/src/naxsi-0.55.3/nxapi/ && python setup.py install
  
  # Create the following files to make Nginx autorun:
  
  if [ -d /etc/init ] && [ "$os_type" != "CentOS" ]; then

cat > /etc/init/nginx.conf <<'EOF'
# nginx
description "nginx http daemon"
author "Philipp Klose <me@[thisdomain].de>"
start on (filesystem and net-device-up IFACE!=lo)
stop on runlevel [!2345]
env DAEMON=/opt/nginx/sbin/nginx
env PID=/opt/nginx/logs/nginx.pid
expect fork
respawn
respawn limit 10 5
#oom never
pre-start script
$DAEMON -t
if [ $? -ne 0 ]
  then exit $?
fi
end script
exec $DAEMON
EOF

  fi

  if grep -qs "release 6" /etc/redhat-release; then

# Ref: https://www.nginx.com/resources/wiki/start/topics/examples/redhatnginxinit/
cat > /etc/init.d/nginx <<'EOF'
#!/bin/sh
#
# nginx - this script starts and stops the nginx daemon
#
# chkconfig:   - 85 15
# description:  NGINX is an HTTP(S) server, HTTP(S) reverse \
#               proxy and IMAP/POP3 proxy server
# processname: nginx
# config:      /opt/nginx/conf/nginx.conf
# pidfile:     /var/run/nginx.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0

nginx="/opt/nginx/sbin/nginx"
prog=$(basename $nginx)

NGINX_CONF_FILE="/opt/nginx/conf/nginx.conf"

[ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx

lockfile=/var/lock/subsys/nginx

make_dirs() {
   # make required directories
   user=`$nginx -V 2>&1 | grep "configure arguments:" | sed 's/[^*]*--user=\([^ ]*\).*/\1/g' -`
   if [ -z "`grep $user /etc/passwd`" ]; then
       useradd -M -s /bin/nologin $user
   fi
   options=`$nginx -V 2>&1 | grep 'configure arguments:'`
   for opt in $options; do
       if [ `echo $opt | grep '.*-temp-path'` ]; then
           value=`echo $opt | cut -d "=" -f 2`
           if [ ! -d "$value" ]; then
               # echo "creating" $value
               mkdir -p $value && chown -R $user $value
           fi
       fi
   done
}

start() {
    [ -x $nginx ] || exit 5
    [ -f $NGINX_CONF_FILE ] || exit 6
    make_dirs
    echo -n $"Starting $prog: "
    daemon $nginx -c $NGINX_CONF_FILE
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}

stop() {
    echo -n $"Stopping $prog: "
    killproc $prog -QUIT
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

restart() {
    configtest || return $?
    stop
    sleep 1
    start
}

reload() {
    configtest || return $?
    echo -n $"Reloading $prog: "
    killproc $nginx -HUP
    RETVAL=$?
    echo
}

force_reload() {
    restart
}

configtest() {
  $nginx -t -c $NGINX_CONF_FILE
}

rh_status() {
    status $prog
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}

case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart|configtest)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
            ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
        exit 2
esac
EOF
  chmod +x /etc/init.d/nginx
  chkconfig nginx on

  fi
  
  if [ -d /lib/systemd/system ]; then
    
cat > /lib/systemd/system/nginx.service <<'EOF'
[Unit]
Description=The NGINX HTTP and reverse proxy server
After=syslog.target network.target remote-fs.target nss-lookup.target

[Service]
Type=forking
PIDFile=/opt/nginx/logs/nginx.pid
ExecStartPre=/opt/nginx/sbin/nginx -t
ExecStart=/opt/nginx/sbin/nginx
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true

[Install]
WantedBy=multi-user.target
EOF
    
    systemctl daemon-reload 2>/dev/null
    systemctl enable nginx.service 2>/dev/null
    
  fi
  
fi

# Create the public folder which will hold robots.txt, etc.
mkdir -p "/var/www/$BLOG_FQDN/public"

# Download example Nginx configuration file
cd /opt/nginx/conf || exit 1
/bin/cp -f nginx.conf nginx.conf.old
if [ "$ghost_num" = "1" ]; then
  example_conf1=https://github.com/hwdsl2/setup-ghost-blog/raw/master/conf/nginx-naxsi.conf
  if ! wget -t 3 -T 30 -nv -O nginx.conf "$example_conf1"; then
    echoerr "Cannot download example nginx.conf."
    exit 1
  fi
fi

example_conf2=https://github.com/hwdsl2/setup-ghost-blog/raw/master/conf/nginx-naxsi-include.conf
if ! wget -t 3 -T 30 -nv -O nginx-include.conf "$example_conf2"; then
  echoerr "Cannot download example nginx-include.conf."
  exit 1
fi

# Modify example configuration for use
if [ "$ghost_num" = "1" ]; then
  /bin/cp -f nginx-include.conf nginx-blog1.conf
  sed -i "s/YOUR.DOMAIN.NAME/$BLOG_FQDN/g" nginx-blog1.conf
else
  /bin/cp -f nginx-include.conf "nginx-blog$ghost_num.conf"
  sed -i -e "/127\.0\.0\.1:2368/s/2368/$ghost_port/" \
  -e "s/ghost_upstream/ghost_upstream$ghost_num/" \
  -e "s/YOUR.DOMAIN.NAME/$BLOG_FQDN/g" "nginx-blog$ghost_num.conf"
  sed -i "/include nginx-blog1\.conf/a\    include nginx-blog$ghost_num.conf;" nginx.conf
fi

# Check the validity of the nginx.conf file:
echo; /opt/nginx/sbin/nginx -t; echo

# The output should look like:
# nginx: the configuration file /opt/nginx/conf/nginx.conf syntax is ok
# nginx: configuration file /opt/nginx/conf/nginx.conf test is successful

# Make sure Nginx can access the blog files
chmod 755 "/var/www/$BLOG_FQDN"

# Finally, start Ghost blog and Nginx:
su - "$ghost_user" -s /bin/bash -c "./starter.sh"
service nginx stop 2>/dev/null
service nginx start

# Retrieve server IP for display below
PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com)

cat <<EOF

==================================================================================

Setup is complete. Your new Ghost blog is now ready for use!

Ghost blog is installed in: /var/www/$BLOG_FQDN
Naxsi and Nginx config files: /etc/nginx and /opt/nginx/conf
Nginx web server logs: /opt/nginx/logs

[Next Steps]

You must set up DNS (A Record) to point $BLOG_FQDN to this server $PUBLIC_IP

Browse to http://$BLOG_FQDN/ghost (alternatively, set up SSH port forwarding
and browse to http://localhost:$ghost_port/ghost) to complete the initial configuration
of your blog. Choose a very secure password.

To restart this Ghost blog:
su - $ghost_user -s /bin/bash -c 'forever stopall; ./starter.sh'

To restart Nginx web server:
service nginx restart

(Optional) Check out my blog article for more configuration steps:
https://blog.ls20.com/install-ghost-0-4-with-nginx-and-naxsi-on-ubuntu/

Ghost docs: https://docs.ghost.org/v0.11/docs
Real-time chat: https://ghost.org/slack
Naxsi docs: https://github.com/nbs-system/naxsi/wiki

==================================================================================

EOF

}

## Defer setup until we have the complete script
ghost_blog_install "$@"

exit 0
