Mavericks MySQL Installer

OS X 10.7 MySQL Installer

#!/bin/bash

# Vars
greetingLine=$'\n\n#############################################\n\n\n';
mysqlInstalledErr=$'\nYou already have MySQL installed!\n';
osError=$'\nOS X 10.7+ Required. Exiting...\n';
downloadMessage=$'\nDownloading MySQL Installers ... may take a few moments\n';
installMessage=$'\nAttempting to install MySQL. Administrator password Required to continue\n'
mountError=$'\nNo Mountable MySQL Volume found\n';
installDir='/Volumes/mysql-5.6.17-osx10.7-x86_64/';

# ############# #
#   Functions   #
# ############# #

# Check the os version before continuing
checkOSVersion() {
    if [[  $(sw_vers -productVersion | grep '10.[7-9]')  ]]
        then
        return 1;
    fi
    return 0
}
# Simple greeting message
greeting() {
    echo $greetingLine;
    echo $'\nMySQL Installer for OSX 10.7+';
    echo $'Before continuing make sure that you do not';
    echo $'have any mysql running otherwise this script will fail.\n';
    echo $greetingLine;
}
# Check if there is a version of MySQL currently installed
# If there is then exit
mysqlCheck() {
    if [[ -d /usr/local/mysql && -d /var/mysql ]]
        then
        echo $mysqlInstalledErr;
        exit;
    fi
    return 1;
}
# Download MySQL
mysqlDownload() {
    echo $downloadMessage;
    curl -# -o ~/Downloads/MySQL.dmg http://cdn.mysql.com/Downloads/MySQL-5.6/mysql-5.6.17-osx10.7-x86_64.dmg
    hdiutil attach -quiet ~/Downloads/MySQL.dmg;
    cd $installDir;

    if [ -d "$installDir" ]; then
        mysqlInstall;
    else
        echo $mountError;
        exit;
    fi
    return 1;
}
# Install MySQL
mysqlInstall() {
    echo $installMessage;
    sudo installer -pkg mysql-5.6.17-osx10.7-x86_64.pkg -target /;
    return 1;
}
# Move Preference pane and start MySQL
mysqlInit() {
    cp -R MySQL.prefPane ~/Downloads/MySQL.prefpane;
    open ~/Downloads/MySQL.prefPane/;
    sleep 15;
    sudo /usr/local/mysql/support-files/mysql.server start;
    echo "export PATH=$PATH:/usr/local/mysql/bin" >> ~/.bash_profile;
    sudo mkdir /var/mysql; sudo ln -s /tmp/mysql.sock /var/mysql/mysql.sock;
}
# ############# #
# End functions #
# ############# #






if [[ checkOSVersion ]]
    then
    # display initial header message
    greeting;
else
    echo $osError;
    exit;
fi

# does user want to continue?
while [[ true ]] ; do
    read -p "DO YOU WANT TO CONTINUE? [Y/N]" yn
    case $yn in
    [Yy]) break ;;
    [Nn]) exit ;;
    * ) echo "Please answer yes or no.";
    esac
done

# check if MySQL is installed
mysqlCheck;

# download and install MySQL
mysqlDownload;

# move files and start MySQL
mysqlInit;