#!/usr/bin/env bash

set -eu

CURDIR=$(cd $(dirname ${BASH_SOURCE[0]}); pwd)
if [ -e /etc/os-release ]; then
  VERSION_ID=$(source /etc/os-release; echo ${VERSION_ID})
  OS_NAME=$(source /etc/os-release; echo ${NAME})
  OS_NAME=${OS_NAME,,}
else #Basically Centos 5/6
  VERSION_ID=($(head -n 1 /etc/redhat-release | \grep -Eo '[0-9]+'))
  OS_NAME=$(awk '{print tolower($1)}' /etc/redhat-release)
  #Stupid ancient bash 3...
fi

case "${OS_NAME}" in
  centos*|red*|almalinux)
    RPM_DIST=".el${VERSION_ID}"
    ;;
  fedora)
    RPM_DIST=".fc${VERSION_ID}"
    ;;
  sles)
    RPM_DIST=".sles${VERSION_ID}"
    ;;
  opensuse)
    RPM_DIST=".opensuse${VERSION_ID}"
    ;;
  *)
    RPM_DIST="%{nil}"
    ;;
esac

RPMBUILD=(rpmbuild --define "_topdir ${CURDIR}" --define "dist ${RPM_DIST}")
if [[ ${NODEPS:-0} != 0 ]]; then
  RPMBUILD=("${RPMBUILD[@]}" --nodeps)
fi

SUDO=${SUDO=`if command -v sudo > /dev/null 2>&1; then echo sudo; fi`}
export PATH=${PATH}:/usr/local/bin

set -vx

echo "Downloading/checking for some essentials..."
if command -v git > /dev/null 2>&1; then
  GIT_VERSION=($(git --version))
  IFS_OLD=${IFS}
  IFS=.
  GIT_VERSION=(${GIT_VERSION[2]})
  IFS=${IFS_OLD}
else
  GIT_VERSION=(0 0 0)
fi

SPEC=${CURDIR}/SPECS/git-lfs.spec

if [[ ${VERSION_ID[0]} == 5 ]]; then
  if ! rpm -q epel-release > /dev/null 2>&1; then
    $SUDO yum install -y epel-release
  fi
fi
$SUDO yum install -y make curl rpm-build tar bison perl-Digest-SHA

mkdir -p ${CURDIR}/{BUILD,BUILDROOT,SOURCES,RPMS,SRPMS}

if ( [[ ${GIT_VERSION[0]} == 1 ]] && [[ ${GIT_VERSION[1]} < 8 ]] ) || [[ ${GIT_VERSION[0]} < 1 ]]; then
  if [[ ${VERSION_ID[0]} != 6 ]]; then
    $SUDO yum install -y git
  else
    curl https://setup.ius.io/ | $SUDO bash
    yum install -y "git >= 1.8.2"
  fi
fi

if ! command -v go; then
  echo "Installing go... one way or another"
  if [[ ${VERSION_ID[0]} == 5 ]]; then
    $SUDO yum install -y curl.x86_64 glibc gcc
    ${CURDIR}/golang_patch.bsh
    "${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/golang.spec
    $SUDO yum install -y --nogpgcheck ${CURDIR}/RPMS/noarch/golang-1*.rpm \
    ${CURDIR}/RPMS/noarch/golang-pkg-bin-linux-amd64-1*.rpm \
    ${CURDIR}/RPMS/noarch/golang-src-1*.noarch.rpm \
    ${CURDIR}/RPMS/noarch/golang-pkg-linux-amd64-1*.noarch.rpm \
    ${CURDIR}/RPMS/noarch/golang-pkg-linux-386-1*.noarch.rpm
  else
    $SUDO yum install -y epel-release
    $SUDO yum install -y golang
  fi
fi

if command -v ruby > /dev/null 2>&1; then
  IFS_OLD=${IFS}
  IFS=.
  RUBY_VERSION=($(ruby -e "print RUBY_VERSION"))
  IFS=${IFS_OLD}
else
  RUBY_VERSION=(0 0 0)
fi

if [[ ${RUBY_VERSION[0]} < 2 ]]; then
  if [[ ${VERSION_ID[0]} < 7 ]]; then
    echo "Downloading ruby..."

    if ! rpm -q epel-release; then
      $SUDO yum install -y epel-release #Optional part of centos
    fi

    $SUDO yum install -y patch libyaml-devel glibc-headers autoconf gcc-c++ glibc-devel readline-devel zlib-devel libffi-devel openssl-devel automake libtool sqlite-devel
    pushd ${CURDIR}/SOURCES
      curl -L -O http://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.2.tar.gz
    popd
    echo "Building ruby..."
    "${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/ruby.spec
    echo "Installing ruby..."
    $SUDO yum install -y --nogpgcheck ${CURDIR}/RPMS/x86_64/ruby*.rpm
    $SUDO yum erase -y libyaml-devel autoconf gcc-c++ readline-devel zlib-devel openssl-devel automake libtool sqlite-devel
  else
    $SUDO yum install -y ruby ruby-devel
  fi
fi

if [[ ${VERSION_ID[0]} == 8 ]]; then
  $SUDO yum install -y rubygems-devel
fi

if ! command -v ronn; then
  echo "Downloading some ruby gems..."
  pushd ${CURDIR}/SOURCES
    curl -L -O https://rubygems.org/downloads/rdiscount-2.1.8.gem
    curl -L -O https://rubygems.org/downloads/hpricot-0.8.6.gem
    curl -L -O https://rubygems.org/downloads/mustache-1.0.1.gem
    curl -L -O https://rubygems.org/downloads/ronn-0.7.3.gem
  popd

  echo "Building ruby gems..."
  "${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/rubygem-rdiscount.spec
  "${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/rubygem-mustache.spec
  "${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/rubygem-hpricot.spec
  "${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/rubygem-ronn.spec

  echo "Installing ruby gems..."
  $SUDO yum install -y --nogpgcheck $(ls ${CURDIR}/RPMS/noarch/rubygem-*.rpm ${CURDIR}/RPMS/x86_64/rubygem-*.rpm | grep -v debuginfo)
fi

rm -fr ${CURDIR}/{BUILD,BUILDROOT}
mkdir -p ${CURDIR}/{BUILD,BUILDROOT}

pushd ${CURDIR}/..
  #Yes, compile lfs before compiling lfs...
  make
  #Use the version output to grab the version number and short sha
  #(that yes, I could have gotten from git myself)
  LFS_VERSION=$(./bin/git-lfs version | sed -r 's|.*/([0-9.]*).*|\1|')
  sed -i 's|\(^Version:\s*\).*|\1'"${LFS_VERSION}"'|' ${CURDIR}/SPECS/git-lfs.spec
popd

#Prep the SOURCES dir for git-lfs
echo "Zipping up current checkout of git-lfs..."

echo "Cleaning ${CURDIR}/tmptar"
rm -rf ${CURDIR}/tmptar

mkdir -p ${CURDIR}/tmptar/git-lfs-${LFS_VERSION}
pushd ${CURDIR}/..
  #I started running out of space in the docker, so I needed to copy a little less waste
  tar -c --exclude tmptar --exclude repos . | tar -x -C ${CURDIR}/tmptar/git-lfs-${LFS_VERSION}/
popd
pushd ${CURDIR}/tmptar
  tar -zcf ${CURDIR}/SOURCES/git-lfs-${LFS_VERSION}.tar.gz git-lfs-${LFS_VERSION}
popd

echo "Cleaning ${CURDIR}/tmptar again"
rm -rf ${CURDIR}/tmptar

#TODO TASK 2
#cp ${CURDIR}/../docker/public.key ${CURDIR}/SOURCES/RPM-GPG-KEY-GITLFS
touch ${CURDIR}/SOURCES/RPM-GPG-KEY-GITLFS

echo "Build git-lfs rpm..."

#--no-deps added for now so you can compile without official rpms installed
"${RPMBUILD[@]}" --nodeps -ba ${CURDIR}/SPECS/git-lfs.spec

echo "All Done!"
