#!/bin/bash
#
# Entrypoint script should be pure bash.
#

#
# Support three arguments (this recommend but not required):
#   -f <file>              Execute file on host, print the result and exit
#   -c <command>           Execute command on host, print the result and exit
#   -v <level>             Verbose mode: 1 - verbose, 2 - super verbose
#   -e <NAME=B64> -e ...   Environement variables (B64 is base64 encoded string)
#   -b <BASE64> -b ...     Base64 encoded bash command
#
while getopts f:c:v:e:b: option
do
case "${option}"
in
f) EXECUTE_FILE=${OPTARG};;
c) EXECUTE_COMMAND=${OPTARG};;
v) VERBOSE=${OPTARG};;
e) ENV+=("$OPTARG");;
b) EBASH+=("$OPTARG");;
esac
done

if [[ $VERBOSE != '' ]]; then
  export XXH_VERBOSE=$VERBOSE
fi

for env in "${ENV[@]}"; do
  name="$( cut -d '=' -f 1 <<< "$env" )";
  val="$( cut -d '=' -f 2- <<< "$env" )";
  val=`echo $val | base64 -d`

  if [[ $XXH_VERBOSE == '1' || $XXH_VERBOSE == '2' ]]; then
    echo Environment variable "$env": name=$name, value=$val
  fi

  export $name="$val"
done

for eb in "${EBASH[@]}"; do
  bash_command=`echo $eb | base64 -d`

  if [[ $XXH_VERBOSE == '1' || $XXH_VERBOSE == '2' ]]; then
    echo Entrypoint bash execute: $bash_command
  fi
  eval $bash_command
done

## Example disabling option:
#if [[ $EXECUTE_COMMAND ]]; then
#  echo '<THIS> entrypoint is not support command execution.'
#  exit 1
#fi

## Example command argument:
#if [[ $EXECUTE_COMMAND ]]; then
#  EXECUTE_COMMAND=(-c "${EXECUTE_COMMAND}")
#fi
#
#if [[ $EXECUTE_FILE ]]; then
#  EXECUTE_COMMAND=""
#fi

## Example of adding argument `-f` before
#EXECUTE_FILE=`[ $EXECUTE_FILE ] && echo -n "-f $EXECUTE_FILE" || echo -n ""`
#

#
# Move to current directory
#
CURRENT_DIR="$(cd "$(dirname "$0")" && pwd)"
cd $CURRENT_DIR

export XXH_HOME=`realpath -m $CURRENT_DIR/../../../../`
#export HISTORY_FILE=$XXH_HOME/.your_portable_shell_history

#
# Run the portable shell
#
./your_portable_shell

# Example:
# ./your_portable_shell $EXECUTE_FILE "${EXECUTE_COMMAND[@]}"