Install / Update Gradle Script (Tested In Fedora 20/CentOS 7)

install_gradle.sh

#!/usr/bin/env bash

: '
    Tested
    ======
    Fedora 20
    CentOS 7

    What?
    =====

    install/update gradle

    Thanks!
    ======
    https://gist.github.com/parzonka/9371885

'

downloadLatestVersion ()
{
    echo "Downloading new version of gradle..."
    sleep 5s
    wget -cN http://services.gradle.org/distributions/gradle-${gradle_version}-all.zip

    echo "Extracting zip file..."
    sleep 5s
    sudo unzip -od /opt/gradle gradle-${gradle_version}-all.zip

    echo "Creating symbolic link..."
    sleep 5s
    sudo ln -sfn gradle-${gradle_version} /opt/gradle/latest

    echo "Setting up environment variables..."
    sudo printf "export GRADLE_HOME=/opt/gradle/latest\nexport PATH=\$PATH:\$GRADLE_HOME/bin\nexport GRADLE_INSTALLED_VERSION='${gradle_version}'" > gradle.sh
    sudo chmod +x gradle.sh
    sudo mv gradle.sh /etc/profile.d/
    . /etc/profile.d/gradle.sh
    echo "Gradle installation done!!!"
}

gradle_service_url='http://services.gradle.org/versions/current'

echo "Fetching latest version number..."
gradle_version=$(echo $(wget -O - -q -t 1 $gradle_service_url) | grep version | awk '{ print $2 }' | sed s/\"//g | sed s/,//g | sed s/version://g)

echo "Current gradle version is:" $gradle_version



if [ -z "$GRADLE_INSTALLED_VERSION" ]
then
    downloadLatestVersion
else
    echo "Your gradle version is:" $GRADLE_INSTALLED_VERSION

    if [ "$gradle_version" != "$GRADLE_INSTALLED_VERSION" ]
    then
        downloadLatestVersion
    else
        echo "You already have the latest version of gradle."
    fi
fi