Setup for Java, Maven, Git, Jenkins and LAMP

setup.sh

# setup Java, Maven, Git, Jenkins and LAMP in ubuntu
#!/bin/bash
sudo apt-get update
echo "Starting setup"
echo "Will install Java, Maven, Git, Jenkins and LAMP"
process_id=""
resetVar() {
    while [ "${#}" -ge 1 ]; do
        unset "${1}"
        shift
    done
}

waitForProcess() {
    echo "Waiting for $1 to complete"
    local process_id=$1
    echo "Process ID: $process_id"
    wait $process_id
}

updateAll() {
    echo "Updating all"
    sudo apt-get update
    waitForProcess $!
    sudo apt-get upgrade
    waitForProcess $!
}

checkFunction() {
    echo "Checking if $1 is already installed"
    $1 --version
    # $? is the exit status of the last executed command.
    if [ "$?" = "0" ]; then
        echo "$1 is already installed"
    else
        echo "$1 is not installed"
        echo "Installing $1"
        sudo apt-get install $1 -y
        waitForProcess $!
        updateAll
    fi
}

resetVar process_id

echo "Checking if java is already installed"

JAVA_VERSION=$(java --version)
if [ "$JAVA_VERSION" = "" ]; then
    echo "Java is not installed"
    echo "Installing Java"
    updateAll
    sudo apt install default-jre
    updateAll
    sudo apt install default-jdk
    updateAll
    
else
    echo "Java is already installed"
fi

resetVar JAVA_VERSION

updateAll

checkFunction "maven"
checkFunction "git"

echo "Checking if jenkins is installed"

JENKINS_VERSION=$(sudo service jenkins status)
if [ "$JENKINS_VERSION" = "" ]; then
    echo "Jenkins is not installed"
    echo "Installing Jenkins"
    wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
    waitForProcess $!
    sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
    waitForProcess $!
    updateAll
    sudo apt install jenkins -y
    waitForProcess $!
    echo "Opening the Firewall for 8080 for jenkins"
    sudo ufw allow 8080
    sudo ufw status
    echo "Starting Jenkins"
    # sudo systemctl start jenkins
    # waitForProcess $!
else
    echo "Jenkins is already installed"
fi
resetVar JENKINS_VERSION

LAMPSetup() {
    echo "Checking if lamp is installed"
    LAMP_VERSION=$(sudo service apache2 status)
    if [ "$LAMP_VERSION" = "" ]; then
        echo "LAMP is not installed"
        echo "Installing LAMP"
        sudo apt-get install apache2 apache2-doc apache2-npm-prefork apache2-utils libexpat1 ssl-cert -y
        waitForProcess $!
        echo "Apache installation completed"
        sudo apt-get install mysql-server -y
        waitForProcess $!
        sudo apt-get install mysql-client libmysqlclient-dev -y
        waitForProcess $!
        echo "Mysql installation completed"
        echo "Installing PHP"
        sudo apt-get install php libapache2-mod-php php-mysql -y
        waitForProcess $!
        echo "PHP installation completed"
        echo "Installing PHP extensions"
        sudo apt-get install php-common -y
        waitForProcess $!
        sudo apt-get install php-dev -y
        waitForProcess $!
        sudo apt-get install php-curl -y
        waitForProcess $!
        sudo apt-get install php-gd -y
        waitForProcess $!
        sudo apt-get install php-pear -y
        waitForProcess $!
        sudo apt-get install php-mbstring -y
        waitForProcess $!
        sudo apt-get install php-xml -y
        waitForProcess $!
        sudo apt-get install php-mcrypt -y
        waitForProcess $!
        sudo apt-get install php-soap -y
        waitForProcess $!
        sudo apt-get install php-intl -y
        waitForProcess $!
        sudo apt-get install php-ldap -y
        waitForProcess $!
        sudo apt-get install php-imagick -y
        waitForProcess $!
        sudo apt-get install php-ps -y
        waitForProcess $!
        sudo apt-get install php-xsl -y
        waitForProcess $!
        sudo apt-get install php-imap -y
        waitForProcess $!
        sudo apt-get install php-bz2 -y
        waitForProcess $!
        sudo apt-get install php-json -y
        waitForProcess $!
        sudo apt-get install php-xmlrpc -y
        waitForProcess $!
        sudo apt-get install php-zip -y
        waitForProcess $!
        echo "PHP extensions installation completed"
        echo "Installing PHPMyAdmin"
        sudo apt-get install phpmyadmin -y
        waitForProcess $!
        echo "PHPMyAdmin installation completed"
    else
        echo "LAMP is already installed"
    fi

    echo "LAMP installation completed"
    resetVar LAMP_VERSION
}

LAMPSetup

echo "Setup completed"