installwordpress.sh

#!/bin/bash

# Copyright Rimuhosting.com
#
# script to install wordpress
#
#

## Detect distro version
if [ -e /etc/redhat-release ]; then
     DISTRO="centos"
elif [ -e /etc/debian_version ]; then
     DISTRO="debian"
fi


set_global_default_env(){

	## Wordpress domain
	WP_DOMAIN=$(hostname)

	## Wordpress location
	if [ $DISTRO = "debian" ]; then
		WP_LOCATION="/var/www/wordpress"
		APACHE_USER="www-data"
	fi
	if [ $DISTRO = "centos" ]; then
		WP_LOCATION="/var/www/html/wordpress"
		APACHE_USER="apache"
	fi

	WP_LOCATION_USER_OWNER=$APACHE_USER
	
	
	## Database credentials for postfixadmin
	WP_DB_PASS=$(</dev/urandom tr -dc A-Za-z0-9 | head -c8)
	WP_DB_USER="wordpress"
	WP_DB_DATABASE="wordpress"
	

	TASKS="all"
	FORCE="no"
	
	if ! getent passwd | grep -q "^$APACHE_USER:"; then

		echo "#################################################################"
		echo "# error: apache user $APACHE_USER does not exist"
		echo "#################################################################"
		exit 1
	fi
	
	if ! getent passwd | grep -q "^$WP_LOCATION_USER_OWNER:"; then
		echo "#################################################################"
		echo "# error: wordpress location user owner $WP_LOCATION_USER_OWNER does not exist"
		echo "#################################################################"
		exit 1
	fi

}

install_deps(){
	
	## Install required packages and configure global enviroment	
	if ! ps aux | grep -q '^mysql.*mysqld'; then
		echo "#################################################################"
                echo "# mysql server not running, attempt to install? (Ctrl-c to abort)"
                echo "#################################################################"		
		[ $FORCE = "no" ] && read 
		MYSQL_INSTALL_SCRIPT_URL='http://proj.ri.mu/installmysql.sh'
		wget $MYSQL_INSTALL_SCRIPT_URL -O /root/installmysql.sh
		if [ $FORCE = "no" ]; then
			bash /root/installmysql.sh --noperl --noapache --nophp
			export MYSQL_ROOT_PASS=$(cat /root/.mysqlp)
		else
			bash /root/installmysql.sh --noprompt --adminpass $MYSQL_ROOT_PASS --noperl --noapache --nophp
		fi
	fi
	
	## Specific distribution packages
	if [ $DISTRO = "debian" ]; then
		a2enmod rewrite
		/etc/init.d/apache2 restart
	fi
	
	#if [ $DISTRO = "centos" ]; then

	#fi
	return 0
}

install_wordpress(){
	GENERIC_PACKAGE_LOCATION='http://wordpress.org/latest.tar.gz'

	wget $GENERIC_PACKAGE_LOCATION -O /tmp/wordpress.tar.gz
	tar -xz -C /tmp -f /tmp/wordpress.tar.gz

	rm -f /tmp/wordpress.tar.gz

	if [ -d $WP_LOCATION ]; then
		echo "#################################################################"
		echo "# Directory $WP_LOCATION already exists, move away and proceed? (Ctrl-c to abort)"
		echo "#################################################################"
		[ $FORCE = "no" ] && read
		mv -v $WP_LOCATION $WP_LOCATION.$(date '+%s')
	fi
	mv /tmp/wordpress $WP_LOCATION
	
	# http://codex.wordpress.org/Hardening_WordPress
	find $WP_LOCATION -type d -exec chmod 755 {} \;
	find $WP_LOCATION -type f -exec chmod 644 {} \;	
	
	chown -R $WP_LOCATION_USER_OWNER: $WP_LOCATION

	# make specific locations writeable by the apache user
	touch $WP_LOCATION/.htaccess
	touch $WP_LOCATION/robots.txt
	chown -R $APACHE_USER: $WP_LOCATION/.htaccess  $WP_LOCATION/wp-content $WP_LOCATION/robots.txt

	
	return 0
}

configure_wordpress_database(){
	echo <<EOFMW "
#################################################################
#								
# $0 is about to create the mysql database for wordpress 
# called '$WP_DB_DATABASE', and also will setup a mysql database
# user '$WP_DB_USER'.
#
# Warning: if the database exists it will be dropped, if the user
# exists the password will be reset. (Ctrl-c to abort)
#
# Please provide the mysql root password if required
#################################################################
"	
EOFMW
	[ $FORCE = "no" ] && read	

	mysql -f -u root -p$MYSQL_ROOT_PASS -e <<EOSQL "DROP DATABASE IF EXISTS $WP_DB_DATABASE ;
CREATE DATABASE $WP_DB_DATABASE;
GRANT ALL PRIVILEGES ON $WP_DB_DATABASE.* TO '$WP_DB_USER'@'localhost' IDENTIFIED BY '$WP_DB_PASS'; 
FLUSH PRIVILEGES;" 
EOSQL
}

configure_wordpress(){
	WP_CONFIG=$WP_LOCATION/wp-config.php

	cp $WP_LOCATION/wp-config-sample.php $WP_CONFIG
	## Edits wordpress config:
	#
	sed -i "s/^define('DB_NAME'.*);/define('DB_NAME', '$WP_DB_DATABASE');/g"  $WP_CONFIG
	sed -i "s/^define('DB_USER'.*);/define('DB_USER', '$WP_DB_USER');/g"  $WP_CONFIG
	sed -i "s/^define('DB_PASSWORD'.*);/define('DB_PASSWORD', '$WP_DB_PASS');/g"  $WP_CONFIG

	SALTSLIST="AUTH_KEY SECURE_AUTH_KEY LOGGED_IN_KEY NONCE_KEY AUTH_SALT SECURE_AUTH_SALT LOGGED_IN_SALT NONCE_SALT"
	
	for s in $SALTSLIST; do
		sed -i "s/^define('"$s".*);/define('"$s"', '"$(</dev/urandom tr -dc A-Za-z0-9 | head -c64)"');/g" $WP_CONFIG
	done
	
	return 0
}

configure_apache(){
	if [ $DISTRO = "debian" ]; then
		APACHE_CONFIG="/etc/apache2/sites-available/$WP_DOMAIN"
		APACHE_INIT="/etc/init.d/apache2"
		APACHE_ERROR_LOG="\${APACHE_LOG_DIR}/$WP_DOMAIN.error.log"
		APACHE_ACCESS_LOG="\${APACHE_LOG_DIR}/$WP_DOMAIN.access.log"
		if [ -f $APACHE_CONFIG ]; then
			echo "#################################################################"
			echo "# Virtual host configuration file $APACHE_CONFIG already exists, move away and proceed? (Ctrl-c to abort)"
			echo "#################################################################"
			[ $FORCE = "no" ] && read
			mv -v $APACHE_CONFIG $APACHE_CONFIG.$(date '+%s')
		fi
      	fi

      	if [ $DISTRO = "centos" ]; then
		APACHE_CONFIG="/etc/httpd/conf/httpd.conf"
		APACHE_INIT="/etc/init.d/httpd"
		APACHE_ERROR_LOG="/var/log/httpd/$WP_DOMAIN.error.log"
		APACHE_ACCESS_LOG="/var/log/httpd/$WP_DOMAIN.access.log"
		if grep -q "DocumentRoot $WP_LOCATION" $APACHE_CONFIG; then
			echo "#################################################################"
			echo "# There seems to be a virtual host pointing to $WP_LOCATION at $APACHE_CONFIG, proceed adding the config anyways? (Ctrl-c to abort)"
			echo "#################################################################"
			[ $FORCE = "no" ] && read
		fi
		echo "#################################################################"
		echo "# Saving httpd config backup"
		echo "#################################################################"
		cp -v $APACHE_CONFIG $APACHE_CONFIG.$(date '+%s')
      	fi

	echo <<EOFVH >>$APACHE_CONFIG "
<VirtualHost *:80>
	ServerAdmin webmaster@localhost
	ServerName $WP_DOMAIN
	DocumentRoot $WP_LOCATION
	<Directory $WP_LOCATION>
		Options Indexes FollowSymLinks MultiViews
		AllowOverride None
		Order allow,deny
		allow from all
	</Directory>

	ErrorLog $APACHE_ERROR_LOG

	LogLevel warn

	CustomLog $APACHE_ACCESS_LOG combined
</VirtualHost>
"
EOFVH

	if [ $DISTRO = "debian" ]; then
		a2ensite $WP_DOMAIN
	fi

	$APACHE_INIT restart

	return 0
}


usage(){
	echo <<USAGE "
Usage: $(basename $0) [OPTION...]
$(basename $0) will attempt to install all configurations for wordpress  by default,
it will generate random passwords and the relevant ones will be informed.This script 
is provided as it is, no warraties implied. 

Options:
 -d <domain>		domain where wordpress will operate. DEFAULT: $WP_DOMAIN
 -l <path>		location path where to install wordpress. DEFAULT: $WP_LOCATION
 -j <dbuser>		mysql database username to be setup. DEFAULT: $WP_DB_USER
 -k <dbpass>		password to be assigned to the mysql database user. DEFAULT: RANDOM
 -i <dbname>		mysql Database name. DEFAULT: $WP_DB_DATABASE
 -u <system_user>	set default install location path ownership to the defined user. DEFAULT: $WP_LOCATION_USER_OWNER
 -a <apache_user>	set ownership in specific paths in the location path to webserver user (wordpress requires to write here). DEFAULT: $APACHE_USER
 -f			force the install, prompts in error/warnings are disabled.
 -h			this Help

Advanced Options:
 -t <task1,task2>	Comma separated of tasks to execute manually, may depend on the above 
			options. DEFAULT: all
 Possible Tasks:
   install_deps			installs wordpress dependencies
   install_wordpress		downloads and installs wordpress package
   configure_wordpress_database	configures wordpress database
   configure_wordpress		configures wordpress
   configure_apache		configures apache virtual host
"
USAGE
}


set_global_default_env

## Parse args and execute tasks
while getopts 'd:l:j:k:i:u:a:t:fh' option; do
	case $option in
	d)	WP_DOMAIN=$OPTARG;;
	l)	WP_LOCATION=$OPTARG;;
	j)	WP_DB_USER=$OPTARG;;
	k)	WP_DB_PASS=$OPTARG;;
	i)	WP_DB_DATABASE=$OPTARG;;
	u)	WP_LOCATION_USER_OWNER=$OPTARG
		if ! getent passwd | grep -q "^$WP_LOCATION_USER_OWNER:"; then
			echo "#################################################################"
			echo "# error: wordpress location user owner $WP_LOCATION_USER_OWNER does not exist"
			echo "#################################################################"
		exit 1
		fi

		;;
	a)	APACHE_USER=$OPTARG
		if ! getent passwd | grep -q "^$APACHE_USER:"; then
			echo "#################################################################"
			echo "# error: apache user $APACHE_USER does not exist"
			echo "#################################################################"
			exit 1
		fi
		;;
	t)	TASKS=$OPTARG;;
	f)	FORCE="yes";;
	h)	usage
		exit 0;;
	[?])	usage
		exit 1;;	
    esac
done
shift $(($OPTIND - 1))


echo <<EOF "
#################################################################
#         
# Using the following enviroment:
# 
# Wordpress domain: $WP_DOMAIN                                         
# Wordpress location: $WP_LOCATION
# Wordpress Mysql username: $WP_DB_USER
# Wordpress Mysql password: $WP_DB_PASS
# Wordpress Mysql database: $WP_DB_DATABASE
# Wordpress location owner: $WP_LOCATION_USER_OWNER 
# Wordpress apache user: $APACHE_USER
#
#################################################################
"
EOF


if [ $TASKS = "all" ]; then
	echo <<EOF "
$(basename $0) will attempt to install all configurations for wordpress by default,
it will generate random passwords and the relevant ones will be informed. This script 
is provided as it is, no warraties implied. (Ctrl-c to abort)
"
EOF
	[ $FORCE = "no" ] && read	
	
	install_deps
	[ $? -ne "0" ] && exit 1
	install_wordpress
	[ $? -ne "0" ] && exit 1
	configure_wordpress_database	
	[ $? -ne "0" ] && exit 1
	configure_wordpress
	[ $? -ne "0" ] && exit 1
	#configure_apache
	[ $? -ne "0" ] && exit 1

else
	for t in $( echo $TASKS | tr ',' ' '); do
		$t
	done
fi


echo <<EOF "
#################################################################
#         
# Used the following enviroment:
# 
# Wordpress domain: $WP_DOMAIN                                         
# Wordpress location: $WP_LOCATION
# Wordpress Mysql username: $WP_DB_USER
# Wordpress Mysql password: $WP_DB_PASS
# Wordpress Mysql database: $WP_DB_DATABASE
# Wordpress location owner: $WP_LOCATION_USER_OWNER 
# Wordpress apache user: $APACHE_USER
# 
# Make sure you have a DNS record $WP_DOMAIN pointing to the server ip.
# Finish the setup by going to http://$WP_DOMAIN and complete the famous five 
# minute WordPress installation process. 
#
# Note: In case the $WP_DOMAIN is matching the server hostname (overlaping default site config),
# the site may not work, you may need to disable the default site in debian based systems or check
# apache configuration, for example
# a2dissite default && service apache2 restart
#################################################################
"
EOF


exit 0