build

#!/bin/bash

PROGRAM=$(basename $0)

function usage() {
  echo "Usage: $PROGRAM --config config_file --name image_name"
  echo "-------------------------------------------------------------------------------------"
  echo "Example: $PROGRAM --config dev.conf --name dev"
}

function error() {
    echo $1
    echo ""
    usage
    exit 1
}

check_args() {
  if [ -z "$CONFIG" ]
  then
        error "Error: {config} argument is missed!"
  fi

  if [ ! -f "$CONFIG" ]
    then
          error "Error: $CONFIG file does not exist!"
  fi

  if [ -z "$NAME" ]
  then
        error "Error: {name} argument is missed!"
  fi

  _configLastString=$(cat -e $CONFIG)
  if [ ${_configLastString: -1} != "$" ]
  then
    error "Configuration file \"$CONFIG\" must end with an empty line"
  fi


  lineNumber=0
  _files=$(cat $CONFIG)
  for _file in $_files
  do
     if [ ! -f "./$_file" ]
     then
       error "Invalid configuration file \"$CONFIG\" at line $lineNumber: \"$_file\" not found"
     fi
     ((lineNumber=lineNumber+1))
  done
}

function cleanup() {
    rm -f $1
}

while true; do
    case $1 in
    --config) CONFIG="$2" ; shift ;;
    --name) NAME="$2" ; shift ;;
    --dryrun) DEBUG=true ;;
    --help) usage ; exit 0; shift ;;
    (--) shift;;
    (-*) error "$PROGRAM: unrecognized option \"$1\"";;
    (*) break;;
    esac
    shift
done


check_args

TMP_DOCKER_FILE="./$(uuidgen).Dockerfile"
touch $TMP_DOCKER_FILE

cat $CONFIG | while read line
do
   echo "Merging from $line"
   echo "# [ $line ]--------------------------------------------------------" >> $TMP_DOCKER_FILE
   cat $line >> $TMP_DOCKER_FILE
   echo "" >> $TMP_DOCKER_FILE
   echo "" >> $TMP_DOCKER_FILE
done

CMD="docker build -t $NAME -f $TMP_DOCKER_FILE ."

 if [ "$DEBUG" = true ] ; then
     echo "Resulting config:"
     cat $TMP_DOCKER_FILE
     echo "Resulting command to execute:"
     echo "$CMD"
     exit 0
 fi

eval $CMD

if [ $? -eq 0 ]; then
   echo "OK"
else
   echo "FAIL"
fi

echo "Resulting Dockerfile located here: $TMP_DOCKER_FILE"