# Copyright 2012 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
# 
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

function mk_build_dir () {
  export TMP_BUILD_DIR=$(mktemp -t -d image.XXXXXXXX)
  [ $? -eq 0 ] || die "Failed to create tmp directory"
  trap cleanup EXIT
  echo Building in $TMP_BUILD_DIR
  export TMP_IMAGE_PATH=$TMP_BUILD_DIR/image
  export TMP_HOOKS_PATH=$TMP_BUILD_DIR/hooks
}

function save_image () {
    # TODO: this really should rename the old file
    if [ -f  $1 ] ; then
       echo "Old Image file Found REMOVING"
       rm -f $1
    fi

    cp $TMP_IMAGE_PATH $1
    rm -r $TMP_BUILD_DIR
    # All done!
    trap EXIT
    echo "Image file $1 created..."
}

function generate_hooks () {
  mkdir -p $TMP_HOOKS_PATH
  for _FLAVOUR in $IMAGE_FLAVOUR ; do 
    [ -d $FLAVOURS_DIR/$_FLAVOUR ] || die "The flavour does not exist." ;
    cp -t $TMP_HOOKS_PATH -a $FLAVOURS_DIR/$_FLAVOUR/* ;
  done
}

# Check that a real flavour has been chosen (prevents foot-guns)
function check_flavour () {
  [ -d $TMP_HOOKS_PATH ] || generate_hooks
}

# Run a hook, looking for a regex in its stdout, and eval the matched lines.
# $1 is the hook to run
# $2 is the regex to look for
function eval_run_d () {
  local TEMP=`run_d $1`
  echo "$TEMP"
  if [ `echo "$TEMP" | grep -s "$2"` ]; then
      TEMP=`echo "$TEMP" | grep "$2"`
      eval "$TEMP"
  fi
}