maven-sync-setup/sync/download-gradle.sh

#!/bin/sh

USAGE="Usage: $0 MAIN_GRADLE_VERSION OTHER_GRADLE_VERSIONS..."

if ["$#" == "0" ]; then
    echo $USAGE
    exit 1
fi

MAIN_VERSION=$1
shift

# Download the main version manually
GRADLE_URL="https://services.gradle.org/distributions/gradle-${MAIN_VERSION}-bin.zip"
DOWNLOAD_PATH=/tmp/gradle.zip

echo "Downloading gradle $MAIN_VERSION"
wget --output-document=$DOWNLOAD_PATH $GRADLE_URL
unzip -d /tmp $DOWNLOAD_PATH
mv /tmp/gradle-${MAIN_VERSION} $GRADLE_HOME
ln -s ${GRADLE_HOME}/bin/gradle /usr/local/bin/gradle
rm -rf $DOWNLOAD_PATH

# Use the main version to download the others
# This is done by creating a fake project for each version,
# and setting up the gradle wrapper. This causes gradle to
# download the required Gradle version to GRADLE_HOME or GRADLE_USER_HOME,
# where it can be reused later.
MAIN_PROJECT_DIR="/tmp/gradle-wrapper-setup"
while (( "$#" )); do
    OTHER_VERSION=$1
    shift

    echo "Downloading gradle $OTHER_VERSION"
    PROJECT_DIR="$MAIN_PROJECT_DIR/gradle-$OTHER_VERSION"
    mkdir -p "$PROJECT_DIR"
    cd "$PROJECT_DIR"
    touch "./settings.gradle.kts"
    gradle wrapper --gradle-version "$OTHER_VERSION"
    ./gradlew build
    cd -
done