#!/usr/bin/zsh
# zsh-sysbackup.zsh
# Ashton Hellwig @ashellwig
# Purpose: Performs a full system backup using Rsync

# --- Pre-Backup ---
function pre_run_func() {
  local build_dir="~/tmp/BUILDS"
  mkdir -p "${build_dir}"
  cat << END > "${build_dir}/rsync-exclude.txt"
/home/ahellwig/tmp/***
/home/ahellwig/.cache/***
/home/ahellwig/.vscode/***
/home/ahellwig/.cargo/***
/home/ahellwig/.rustup/***
/home/ahellwig/.cargo/***
/home/ahellwig/.g*/***
/dev/*
/proc/*
/sys/*
/tmp/*
/run/*
/mnt/*
/media/*
/lost+found
/swapfile
/srv/*
/var/log/*
END
  cd "${build_dir}"
  return
}

# --- Backup Function ---
function run_func() {
  # For production, replace '--dry-run' with '--info=flist2,name,progress'
  local build_dir="~/tmp/BUILDS"
  sudo rsync '-aAxXhHv' '--partial' '--delete' '--dry-run' '--exclude-from="${build_dir}/rsync-exclude.txt"' '/' '/mnt/backup'
  return
}

# --- Clean Function ---
function clean_func() {
  local build_dir="~/tmp/BUILDS"
  if [[ "$(pwd)" = "${build_dir}"]]; then
    cd ~
  fi
  rm '-rf' "${build_dir}"
  return
}

# --- Call to Functions ---
function main_func() {
  print -f "\033[3;33m\nCreating Necessary Directories...\033[0m\n"
  pre_run_func

  print -f "\n\033[3;4;32mBeginning Backup\033[0m\n"
  run_func

  print -f "\n\033[3;33m \033[0m\n"
  clean_func

  print -f "\n\033[3;33mUnsetting functions and variables...\033[0m\n"
  if [[ -v build_dir ]]; then
    unset build_dir
  fi
  unfunction pre_run_func &
  unfunction run_func &
  unfunction clean_func

  print -f "\n\033[1;32mDone!\033[0m\n"
  return 0
}

# --- Script ---
main_func

# Final Cleanup
unfunction main_func
return 0

# vim: set et ts=2 sw=2 ft=zsh: