#!/usr/bin/env bash

# Usage: 
#  ./run_dockers.bsh - Run all the docker images
#  ./run_dockers.bsh lfs_centos_5 lfs_centos_7 - Run only CentOS 5 & 7 image
#  ./run_dockers.bsh lfs_centos_6 -- bash #Runs bash in the CentOS 6 docker 
#
# Special Environmet Variables
#  REPO_HOSTNAME - Override the hostname for all the repos generated/tested
#  BUILD_LOCAL - Set to 1 (default) to use the current checkout version of
#                git-lfs to build against. Else the released archived is
#                downloaded and built against.
#                Currently only works for RPMs. DEB always builds the current
#                checkout version
#  DOCKER_AUTOBUILD - Default 1. If set to 0, it will not build docker images 
#                before running
#  AUTO_REMOVE - Default 1. If set to 0, it will not automatically delete the
#                docker instance when done. This can be useful for a post mortem
#                analysis. Just make sure you clean up the docker instances 
#                manually

set -eu

CUR_DIR=$(cd $(dirname "${BASH_SOURCE[0]}"); pwd)
REPO_DIR=$(cd ${CUR_DIR}/..; pwd)
PACKAGE_DIR=${REPO_DIR}/repos

#If you are not in docker group and you have sudo, default value is sudo
: ${SUDO=`if id -nG | grep -qwv docker && which sudo > /dev/null 2>&1; then echo sudo; fi`}

function split_image_name()
{ #$1 - image directory name or dockerfile
  #sets IMAGE_NAME to the basename of the dir containing the docker file
  #sets IMAGE_INFO to be the array name following my pattern
  IMAGE_NAME=$(basename $1)
  if [ "${IMAGE_NAME,,}" == "dockerfile" ]; then
    IMAGE_NAME=$(basename $(dirname $1))
  fi
  
  local IFS=_
  IMAGE_INFO=(${IMAGE_NAME})
}

# Parse Arguments
IMAGES=()
while [[ $# > 0 ]]; do
  if [ "$1" == "--" ]; then
    shift
    DOCKER_CMD="${@}"
    break
  else
    IMAGES+=("$1")
  fi
  shift
done

if [[ ${#IMAGES} == 0 ]]; then
  IMAGES=($(ls -d ${CUR_DIR}/git-lfs_*/Dockerfile))
fi

mkdir -p "${PACKAGE_DIR}"
#Run docker to build pacakges
for DOCKER_FILE in "${IMAGES[@]}"; do
  split_image_name "${DOCKER_FILE}" #set IMAGE_NAME and IMAGE_INFO

  #TODO REMOVE THIS AFTER THE REAL git-lfs-repo packages
  if [ "${IMAGE_INFO[1]}" == "debian" ]; then
    if [ "${IMAGE_INFO[2]}" == "7" ]; then
      echo "deb http://${REPO_HOSTNAME:-git-lfs.github.com}/debian/7 wheezy main" > ${CUR_DIR}/git-lfs-main_7.list
    elif [ "${IMAGE_INFO[2]}" == "8" ]; then
      echo "deb http://${REPO_HOSTNAME:-git-lfs.github.com}/debian/8 jessie main" > ${CUR_DIR}/git-lfs-main_8.list
    fi
  fi
  #END TODO

  #Auto build docker unless DOCKER_AUTOBUILD=0
  if [[ ${DOCKER_AUTOBUILD-1} != 0 ]]; then
    ${CUR_DIR}/build_dockers.bsh ${DOCKER_FILE}
  fi

  #It CAN'T be empty () with set -u...
  OTHER_OPTIONS=("-it" "-e" "BUILD_LOCAL=${BUILD_LOCAL-1}")
  
  if [ "${AUTO_REMOVE-1}" == "1" ]; then
    OTHER_OPTIONS+=("--rm")
  fi

  if [ -s ${CUR_DIR}/signing.key ]; then
    set +e
    source ${CUR_DIR}/preload_key.bsh
    set -e
    OTHER_OPTIONS+=("-e" "GPG_AGENT_INFO=${GPG_AGENT_INFO}")
    OTHER_OPTIONS+=("-v" "$(dirname ${GPG_AGENT_INFO}):$(dirname ${GPG_AGENT_INFO})")
  fi

  echo Compiling LFS in docker image ${IMAGE_NAME}
  IMAGE_REPO_DIR="${PACKAGE_DIR}"/"${IMAGE_INFO[1]}"/"${IMAGE_INFO[2]}"
  $SUDO docker run "${OTHER_OPTIONS[@]}" \
                   -e REPO_HOSTNAME=${REPO_HOSTNAME:-git-lfs.github.com} \
                   -v ${REPO_DIR}:/src \
                   -v ${IMAGE_REPO_DIR}:/repo \
                   ${IMAGE_NAME} ${DOCKER_CMD-}

done