#!/usr/bin/env bash
# https://github.com/stmuk/rakudup

RAKUDO_ROOT="${HOME}/.rakudup"

set -e

if [ ! -z "$DEBUG" ]
then
    set -x 
fi

if [ ! -d "${RAKUDO_ROOT}" ]; then
    mkdir "${RAKUDO_ROOT}"
fi

if [[ ! $(git --version) =~ ^git ]]; then
    echo "Install git"
    exit 1
fi

if [[ ! $(perl -v) =~ "Perl 5" ]]; then
    echo "Install Perl 5"
    echo "For a local install to your home: curl -L https://install.perlbrew.pl | bash"
    echo "'perlbrew install perl-5.26.1 --notest -Duseshrplib -Dusemultiplicity' to create a version of Perl 5 suitable for use with Perl6's Inline-Perl5"
    exit 1
fi

TMP="${RAKUDO_ROOT}/tmp"

RELEASE=$(git clone -q --no-checkout --depth 1 https://github.com/rakudo/rakudo.git ${TMP} > /dev/null 2>&1 && git -C ${TMP} show master:VERSION && rm -rf ${TMP})

RAKUDO_SRC="${RAKUDO_ROOT}/${RELEASE}/src"
RAKUDO_INSTALL="${RAKUDO_ROOT}/${RELEASE}/install"

if [[ -d ${RAKUDO_INSTALL} ]]; then
    echo "${RELEASE} already installed not updating"
    exit 1
fi

echo "Getting Rakudo ${RELEASE}"

git clone -q -c advice.detachedHead=false --depth=1 -b ${RELEASE} https://github.com/rakudo/rakudo.git "${RAKUDO_SRC}"

cd ${RAKUDO_SRC} || exit 1
echo "Building Rakudo ${RELEASE}. This will take several minutes on a modern CPU and requires ~2Gb of RAM."
echo "'tail -f ${RAKUDO_SRC}/build.log' for progress"

CFLAGS="-pipe" perl Configure.pl --gen-moar --prefix="${RAKUDO_INSTALL}" --make-install > "${RAKUDO_SRC}/build.log" 2>&1

if [[ $? == 1 ]]; then
    exit $?
fi

echo "Built Rakudo ${RELEASE} OK in ${SECONDS} sec(s)"

ln -sf "${RAKUDO_INSTALL}" "${RAKUDO_ROOT}/install"

echo "Installing zef (module installer)"
git clone -q --depth=1 https://github.com/ugexe/zef.git "${RAKUDO_SRC}/zef"
cd "${RAKUDO_SRC}"/zef && "${RAKUDO_INSTALL}"/bin/perl6 -Ilib bin/zef install .

if [[ ! -d ${RAKUDO_ROOT}/site ]]; then
    mkdir "${RAKUDO_ROOT}/site"
fi

ln -sf "${RAKUDO_INSTALL}/share/perl6/site/bin" "${RAKUDO_ROOT}/site/bin"

ADDPATH="export PATH=${RAKUDO_ROOT}/install/bin:${RAKUDO_ROOT}/site/bin:\$PATH"

if [[ -z $(grep .rakudup ${HOME}/.profile) ]]; then
    echo "${ADDPATH}" >> "$HOME/.profile"
    echo "'${ADDPATH}' added to end of .profile for next login"
    echo "or use this command to take effect now"
fi

echo "Installation finished OK"
exit 0