#!/bin/bash
#
# Script to build khaganat server
#
#    Copyright (C) 2017  AleaJactaEst
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

declare -i REMOVE=0
declare -i IMAGE=0
declare -i BUILD=1
declare -i DEBUG=0
declare JOBS=""
declare CMAKEOPTS=""
declare DOCKEROPTS=""
declare DIRBUILD=""
declare CLEANDOCKER=0
declare -i CLEANIMAGENONE=0
declare -i AUTODETEC=1
declare DOCKERBUILDOPT=""

declare IMAGEDOCKER="builder_khanat_debian_jessie_i686"
declare LOCALBUILDDIR="build/$IMAGEDOCKER"
declare LOCALSRC="debian/jessie/i686"


usage()
{
cat << EOF
usage:$0 [options]
  script to build under docker

  Step: 
   1) clean old build directory
   2) create image builder
   3) launch build under docker (launch script build-under-docker.sh)
   4) remove docker container with state exited

options:
  -h, --help       : Show this help
  -d, --debug      : Show debug message
  -r, --remove     : Remove old build repository
  -f, --force-create-image : force to create docker image (use to build khanat) - default autodetec.
  -j [N], --jobs[=N]          Allow N jobs at once; infinite jobs with no arg.
  -a OPTS, --add-opts-cmake=OPTS : Adding options on cmake command (before build)
  -c, --clean-container : remove all container in state Exited
  -w, --clean-images-none : Remove images docker (with name 'none')
  -m OPTS, --add-opts-docker=OPTS : Adding options on docker command (when build)
  
Example :
  cd [root Khanat directory]
  ./build.sh -c -r
  ./build.sh -c -r -j 4 -a '-DWITH_SYMBOLS=ON' -a '-DWITH_RYZOM_TOOLS=OFF' -a '-DWITH_NEL_TOOLS=OFF' -m '-m 20g'
EOF
}

function msg_debug()
{
   if [[ $DEBUG -ne 0 ]]
   then
      echo "$(date "+%Y/%m/%d %H:%M:%S") DEBUG - $*"
   fi
}

function msg_info()
{
   echo "$(date "+%Y/%m/%d %H:%M:%S") INFO - $*"
}

function msg_error()
{
   echo "$(date "+%Y/%m/%d %H:%M:%S") ERROR - $*" >&2
}

#
# MAIN
#

calldir="$(dirname $0)"
basedir=$(cd $calldir; pwd)
rootdir="$(dirname $(dirname $(dirname $(dirname $(dirname $(dirname ${basedir}))))))"

while test $# -gt 0
do
   case "$1" in
      -h|--help)
         usage
         exit 1
         ;;
      -d|--debug) 
         DEBUG=1
         shift
         ;;
      -c|--clean-container) 
         CLEANDOCKER=1
         shift
         ;;
      -r|--remove) 
         REMOVE=1
         shift
         ;;
      -f|--force-create-image)
         IMAGE=1
         DOCKERBUILDOPT="$DOCKERBUILDOPT --no-cache"
         shift
         ;;
      -j)
         shift
         # search next argument is value or new argument
         if [[ ${1:0:1} == "-" ]]
         then
            JOBS="-j"
         else
            JOBS="-j $1"
            shift
         fi
         ;;
      --jobs*)
         if [[ ${1#*=} == "" ]]
         then
            JOBS="-j"
         else
            JOBS="-j ${1#*=}"
         fi
         shift
         ;;
      -a)
         shift
         CMAKEOPTS="$CMAKEOPTS $1"
         shift
         ;;
      --add-opts-cmake=*)
         CMAKEOPTS="$CMAKEOPTS ${1#*=}"
         shift
         ;;
      -m)
         shift
         DOCKEROPTS="$DOCKEROPTS $1"
         shift
         ;;
      --add-opts-docker=*)
         DOCKEROPTS="$DOCKEROPTS ${1#*=}"
         shift
         ;;
      -w|--clean-images-none)
         CLEANIMAGENONE=1
         shift
         ;;
      *)
         msg_error "options '$1' not recoginze"
         usage
         exit 1
         ;;
   esac
done

function chrashed()
{
   msg_error "BUILD FAILED (code:$?)"
   exit 2
}

trap chrashed EXIT

msg_debug "prg: $0"

docker -v 1>/dev/null
if [[ $? -ne 0 ]]
then
   echo "*** ERROR docker not installed"
   exit 2
fi

if [[ $AUTODETEC -ne 0 ]]
then
   if [[ $(docker images -f "reference=$IMAGEDOCKER" | wc -l) -lt 2 ]]
   then
      IMAGE=1
   fi
fi

DIRBUILD="${rootdir}/code/${LOCALBUILDDIR}"

msg_debug "calldir: $calldir"
msg_debug "basedir: $basedir"
msg_debug "rootdir: $rootdir"
msg_debug "JOBS: '$JOBS'"
msg_debug "CMAKEOPTS: '$CMAKEOPTS'"
msg_debug "DOCKEROPTS: '$DOCKEROPTS'"

mkdir -p "${DIRBUILD}"
if [[ $REMOVE -ne 0 ]]
then
   msg_info "REMOVE OLD BUILD"
   rm -rf ${DIRBUILD}/* || exit 2
fi

touch ${DIRBUILD}/build.log

cat << EOF > ${DIRBUILD}/envi.sh
#!/bin/bash
export MAKEOPTS="$JOBS"
export CMAKEOPTS="$CMAKEOPTS"
EOF

if [[ $IMAGE -ne 0 ]]
then
   msg_info "GENERATE DOCKER IMAGE"
   cd $rootdir; docker build . ${DOCKERBUILDOPT} -t ${IMAGEDOCKER} \
           --file "${basedir}/Dockerfile" || exit 2
fi

if [[ $BUILD -ne 0 ]]
then
   msg_info "BUILD"
   cd $rootdir; docker run -it \
           --hostname=builder \
           -u "$(id -u $USERNAME):$(id -g $USERNAME)" \
           -v $rootdir/dist:/opt/dist \
           -v $rootdir/code:/opt/code \
           ${DOCKEROPTS} \
           ${IMAGEDOCKER} \
           /opt/dist/docker/builder/${LOCALSRC}/build-under-docker.sh "/opt/code/${LOCALBUILDDIR}" || exit 2
fi

if [[ $CLEANDOCKER -ne 0 ]]
then
   msg_info "CLEAN CONTAINER"
   docker rm --force `docker ps -qf 'status=exited' -f "ancestor=${IMAGEDOCKER}"` || exit 2
fi

if [[ $CLEANIMAGENONE -ne 0 ]]
then
   msg_info "CLEAN IMAGE DOCKER 'NONE'"
   listimages=( $(docker images | awk '{if ($1=="<none>")print $3}') )

   msg_debug "IMAGES NONE : ${listimages[@]}"
   if [[ -n "${listimages[@]}" ]]
   then
      docker rmi --force "${listimages[@]}" || exit 2
   fi
fi

trap '' EXIT
msg_info "END"