#!/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 "${OS_NAME}" in
  centos*|red*)
    RPM_DIST=".el${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
LOG=${CURDIR}/build.log
SUDO=${SUDO=`if which sudo > /dev/null 2>&1; then echo sudo; fi`}
export PATH=${PATH}:/usr/local/bin

exec 6>&1
exec 7>&2

exec > $LOG
exec 2>> $LOG

set -vx

echo "Downloading/checking for some essentials..." >&6
if which 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 which 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
    $SUDO yum install -y  curl-devel expat-devel gettext openssl-devel zlib-devel perl-Error perl-ExtUtils-MakeMaker emacs asciidoc xmlto gcc
    #I only include emacs here because the real RHEL rpm create emacs hook, so I will too for MAX compatibility
    pushd ${CURDIR}/SOURCES
      curl -L -O http://vault.centos.org/6.6/os/Source/SPackages/git-1.7.1-3.el6_4.1.src.rpm
      rpm2cpio git-1.7.1-3.el6_4.1.src.rpm | cpio -div git-init.el git.xinetd.in git.conf.httpd git-gui.desktop gitweb.conf.in
      NEW_GIT_VERSION=$(\grep ^Version: ${CURDIR}/SPECS/git.spec | sed  's|Version:\s*\(.*\)|\1|')
      curl -L -O http://kernel.org/pub/software/scm/git/git-${NEW_GIT_VERSION}.tar.xz
      "${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/git.spec
      $SUDO yum install -y --nogpgcheck ${CURDIR}/RPMS/*/git-${NEW_GIT_VERSION}*.rpm ${CURDIR}/RPMS/*/perl-Git-${NEW_GIT_VERSION}*.rpm
    popd
  fi
fi

if ! which go; then
  echo "Installing go... one way or another" >&6
  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 which 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..." >&6

    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 ${CURDIR}/SOURCES
      curl -L -O http://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.2.tar.gz
    popd
    echo "Building ruby..." >&6
    "${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/ruby.spec
    echo "Installing ruby..." >&6
    $SUDO yum install -y --nogpgcheck ${CURDIR}/RPMS/x86_64/ruby*.rpm
  else
    $SUDO yum install -y ruby ruby-devel
  fi
fi

if ! which ronn; then
  echo "Downloading some ruby gems..." >&6
  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..." >&6
  "${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..." >&6
  $SUDO yum install -y --nogpgcheck $(ls ${CURDIR}/RPMS/noarch/rubygem-*.rpm ${CURDIR}/RPMS/x86_64/rubygem-*.rpm | grep -v debuginfo)
fi

pushd ${CURDIR}/..
  #Yes, compile lfs before compiling lfs...
  ./script/bootstrap
  #Use the version output to grab the version number and short sha 
  #(that yes, I could have gotten from git myself)
  LFS_VERSION=$(./bin/git-lfs version | sed -r 's|.*/([0-9.]*).*|\1|')
  sed -i 's|\(^Version:\s*\).*|\1'"${LFS_VERSION}"'|' ${CURDIR}/SPECS/git-lfs.spec
  #LFS_SHA=$(git rev-parse --short HEAD)
  #sed -i 's|\(^commit=*\).*|\1'"${LFS_SHA}"'|' ./script/run
  #Not needed thanks to #549
popd

#Prep the SOURCES dir for git-lfs
echo "Zipping up current checkout of git-lfs..." >&6
  
rm -rvf ${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 ${CURDIR}/tmptar/git-lfs-${LFS_VERSION}
  git clean -xdf
  rm -rvf .git
popd
pushd ${CURDIR}/tmptar
  tar -zcf ${CURDIR}/SOURCES/git-lfs-${LFS_VERSION}.tar.gz git-lfs-${LFS_VERSION}
popd
rm -rvf ${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..." >&6

"${RPMBUILD[@]}" -ba ${CURDIR}/SPECS/git-lfs.spec

echo "All Done!" >&6