#!/bin/bash

# CONSTANTS

MIAOU_BASH_DIR=${MIAOU_BASH_DIR:-/opt/miaou-bash}
ORIGINAL="ORIGINAL"
PREDEFINED_CONFIG_FILES=(/etc/bash.bashrc /etc/inputrc /etc/vim/vimrc)
readonly MIAOU_BASH_DIR ORIGINAL

# FUNCTIONS

function no_more_skeleton {
  [[ -e /etc/skel/.bashrc ]] && rm /etc/skel/.bashrc && echo "skeleton .bashrc removed!"
}

function predefine_config_files {
  for i in "${PREDEFINED_CONFIG_FILES[@]}"; do
    if [[ -f "$i" ]] && [[ ! -f "$i.$ORIGINAL" ]]; then
      mv "$i" "$i.$ORIGINAL"
      basefile=$(basename "$i")
      ln -s "$MIAOU_BASH_DIR/$basefile" "$i"
    fi
  done
}

function bin_miaou_bash {
  [[ ! -e /usr/bin/miaou-bash ]] &&
    ln -s "$MIAOU_BASH_DIR/bin/miaou-bash" /usr/bin/ &&
    echo "miaou-bash globally defined!"
}

# MAIN

set -TEeu -o pipefail
[ "$(id -u)" -ne 0 ] && echo 'root privilege required' && exit 1

no_more_skeleton
predefine_config_files
bin_miaou_bash