#!/bin/sh
#  vim:ts=4:sts=4:sw=4:et
#
#  Author: Hari Sekhon
#  Date: 2016-08-01 10:17:55 +0100 (Mon, 01 Aug 2016)
#
#  https://github.com/harisekhon/bash-tools
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/harisekhon
#

set -eu
[ -n "${DEBUG:-}" ] && set -x

echo "================================================================================"
echo "                              S B T   I n s t a l l"
echo "================================================================================"

SBT_VERSION=${1:-${SBT_VERSION:-0.13.12}}

BASE=/opt

echo
date '+%F %T  Starting...'
start_time="$(date +%s)"
echo

if type yum 2>/dev/null; then
    curl -L https://bintray.com/sbt/rpm/rpm | tee /etc/yum.repos.d/bintray-sbt-rpm.repo
    yum install -y java-sdk
    yum install -y --nogpgcheck sbt
elif type apt-get 2>/dev/null; then
    apt-get update
    apt-get install -y openjdk-8-jdk scala gnupg2
    echo "deb https://dl.bintray.com/sbt/debian /" | tee -a /etc/apt/sources.list.d/sbt.list
    apt-get install -y --no-install-recommends apt-transport-https
    apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 642AC823
    apt-get update
    apt-get install -y sbt
else
    echo "No mainstream package managers detected, doing tarball install"
    if ! [ -e "$BASE/sbt" ]; then
        mkdir -p "$BASE"
        cd "$BASE"
        wget -t 10 --retry-connrefused https://dl.bintray.com/sbt/native-packages/sbt/$SBT_VERSION/sbt-$SBT_VERSION.tgz && \
        tar zxvf sbt-$SBT_VERSION.tgz && \
        rm -f sbt-$SBT_VERSION.tgz
        echo
        echo "SBT Install done"
    else
        echo "$BASE/sbt already exists - doing nothing"
    fi
    if ! [ -e /etc/profile.d/sbt.sh ]; then
        echo "Adding /etc/profile.d/sbt.sh"
        # shell execution tracing comes out in the file otherwise
        set +x
        cat >> /etc/profile.d/sbt.sh <<EOF
export SBT_HOME=/opt/sbt
export PATH=\$PATH:\$SBT_HOME/bin
EOF
    fi
fi

echo
date '+%F %T  Finished'
echo
end_time="$(date +%s)"
time_taken="$((end_time - start_time))"
echo "Completed in $time_taken secs"
echo
echo "=================================================="
echo "              SBT Install Completed"
echo "=================================================="
echo