#!/usr/bin/env bash

function usage {
   echo "./$(basename "$0")[-h] [-v] -- Makes a list of installed packages for Solus, and saves it to ~/InstalledPackages

   where:
      -h  show this help text
      -v  Show verbose output
   "
}

function print_out {
   local MESSAGE="$*"
   if [[ "${VERBOSE}" == true ]];then
      echo "$MESSAGE"
   fi
}

function execute {
   local COMMAND="$*"
   if [[ "${VERBOSE}" == true ]];then
      bash -c "${COMMAND}"
   fi
}

FILE=~/InstalledPackages

# list of arguments expected in the input
optstring=":hv"

while getopts ${optstring} option; do
  case "${option}" in
   h) usage
      exit
      ;;
   v)
      VERBOSE='true'
      print_out "Verbose mode is ON"
      ;;
   ?)
      echo "Invalid option: -${OPTARG}." >&2
      echo usage >&2
      exit 1
      ;;
  esac
done
shift $((OPTIND - 1))

print_out "Exporting all installed package names to  ${FILE}"
eopkg li | cut -d " " -f 1 | tr '\n' ' ' > ${FILE}

if [ -s "${FILE}" ]; then
    print_out "${FILE} successfully written."
else
    echo "${FILE} does not exist or is empty! Something went wrong. Trying to cat the file:"

    cat ~/InstalledPackages
fi

print_out "Content of ${FILE}"
execute "cat ${FILE} && echo"

echo "Finished exporting package names"