A Bash script that builds nginx from source

nginx_setup.sh

#!/bin/bash

# This script builds the popular nginx server (https://nginx.org) on *nix systems with
# thread pool support and the following modules:
#
# ngx_http_ssl_module (https://nginx.org/en/docs/http/ngx_http_ssl_module.html)
# ngx_http_v2_module (https://nginx.org/en/docs/http/ngx_http_v2_module.html)
# ngx_http_mp4_module (https://nginx.org/en/docs/http/ngx_http_mp4_module.html)
# ngx_http_gzip_static_module (https://nginx.org/en/docs/http/ngx_http_gzip_static_module.html)
# ngx_http_gunzip_module (https://nginx.org/en/docs/http/ngx_http_gunzip_module.html)
# ngx_http_perl_module (https://nginx.org/en/docs/http/ngx_http_perl_module.html)
# ngx_mail_core_module (https://nginx.org/en/docs/mail/ngx_mail_core_module.html)
# ngx_mail_ssl_module (https://nginx.org/en/docs/mail/ngx_mail_ssl_module.html)
# ngx_stream_core_module (https://nginx.org/en/docs/stream/ngx_stream_core_module.html)
# ngx_stream_ssl_module (https://nginx.org/en/docs/stream/ngx_stream_ssl_module.html)
#
# To specify an installation path other than /usr/local/nginx, pass the path as the first
# argument to the script.

read -d '' HELP_STRING <<'EOF'

This script builds and installs Nginx 1.12.1 on *nix systems with HTTPS,
HTTP/2, thread pool, auto-compression, MP4 streaming, Perl scripting,
debugging and mail proxy and stream proxy support.

Usage:
  ./nginx_setup.sh <options>

Options:
  -h:             Display this help menu
  --path=PATH:    Installation path for Nginx (default /usr/local/nginx)
                  This must be an absolute path
  -v:             Verbose (shows output of make command)

Examples:
  ./nginx_setup.sh -h
  ./nginx_setup.sh --path=/home/ubuntu/.nginx
  ./nginx_setup.sh -v --path=/etc/nginx

EOF

INSTALL_PATH=/usr/local/nginx
VERBOSE=0

set -e

function check_path() {
  if [ -d "$INSTALL_PATH" ]; then
    if [ -f "$INSTALL_PATH/sbin/nginx" ] || [ -f "$INSTALL_PATH/nginx" ]; then
      echo "An nginx installation already exists at $INSTALL_PATH"
      read -p "Please provide a different installation path (or q to exit): " INSTALL_PATH
      case $INSTALL_PATH in
        q)
        exit 0
        ;;
        *)
        check_path
        ;;
      esac
    fi
  fi
}

function get_nginx_deps() {
  if [ ! -d pcre-8.41 ]; then
    wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.41.tar.gz
  fi

  if [ ! -d zlib-1.2.11 ]; then
    wget http://zlib.net/zlib-1.2.11.tar.gz
  fi

  if [ ! -d openssl-1.1.0f ]; then
    wget http://www.openssl.org/source/openssl-1.1.0f.tar.gz
  fi
  
  if [ ! -d nginx-1.12.1 ]; then
    wget http://nginx.org/download/nginx-1.12.1.tar.gz
  fi

  for archive in *.tar.gz; do
    if [ -f $archive ]; then
      if [ $VERBOSE -eq 0]; then
        tar xf $archive
      else
        tar xvf $archive
      fi
    fi
  done

  rm -rf ./*.tar.gz
}

function configure() {
  ./configure \
    --prefix="$INSTALL_PATH" \
    --with-pcre=../pcre-8.41 \
    --with-zlib=../zlib-1.2.11 \
    --with-openssl=../openssl-1.1.0f \
    --with-debug \
    --with-threads \
    --with-http_ssl_module \
    --with-http_v2_module \
    --with-http_mp4_module \
    --with-http_gzip_static_module \
    --with-http_gunzip_module \
    --with-http_perl_module \
    --with-mail \
    --with-mail_ssl_module \
    --with-stream \
    --with-stream_ssl_module
}

function spinner() {
  spin='-\|/'
  i=0
  while kill -0 $1 2>/dev/null
  do
    i=$(( (i+1) %4 ))
    printf "\r${spin:$i:1}"
    sleep .1
  done
}

function build_nginx() {
  cd nginx-1.12.1
  if [ $VERBOSE -eq 0 ]; then
    echo "Configuring nginx..."
    configure > /dev/null 2>&1
    echo "Building nginx..."
    make -j4 > /dev/null 2>&1 &
    pid=$!
    spinner $pid
    echo
  else
    configure
    make -j4
  fi
}

function install_nginx() {
  read -s -p "Please enter your password so nginx can be installed: " password
  echo
  echo $password | sudo -S make install
  
  if (type -p nginx); then
    echo "You already have an active nginx installation."
    echo "To make this one the default, run the following command:"
    echo
    echo "sudo ln -s $INSTALL_PATH/sbin/nginx $(which nginx)"
    echo
    echo "For safety's sake, please stop any running instances of nginx first."
    echo "Copying existing configuration files..."

    if [ -d "$(dirname $(which nginx))/../conf" ]; then
      CONF_FILES="$(dirname $(which nginx))/../conf"
    elif [ -d "$(dirname $(which nginx))/conf" ]; then
      CONF_FILES="$(dirname $(which nginx))/conf"
    fi
    
    if [ -z "$CONF_FILES" ]; then
      echo "Search for configuration files failed. You may have to copy them yourself."
    else
      cd $CONF_FILES
      echo $password | sudo -S cp -a `ls | grep -v 'default\$'` $INSTALL_PATH/conf/
      echo "Existing configuration copied. Please review before running."
    fi
  else
    echo $password | sudo -S ln -s "$INSTALL_PATH/sbin/nginx" /usr/local/bin/nginx
  fi
}

function show_success() {
  echo "Nginx 1.12.1 is installed at $INSTALL_PATH"
  echo
  ls -lFHa $INSTALL_PATH
}

# Parse options
for opt in "$@"
do
case $opt in
  --path=*)
  INSTALL_PATH="${opt#*=}"
  shift
  ;;
  -h)
  echo "$HELP_STRING"
  exit 1
  ;;
  -v)
  VERBOSE=1
  shift
  ;;
  *)
  echo "Unknown option"
  echo "$HELP_STRING"
  exit 1
  ;;
esac
done

mkdir -p .nginx
cd .nginx
check_path
get_nginx_deps
build_nginx
install_nginx
show_success

set +e