uninstall

#!/usr/bin/env bash

set -e

# ---------------------------------------------- #
#
# "uninstall --help" for more information.
#
# ---------------------------------------------- #

# ---------------------------------------------- #
#                   shell-utils                  #
# ---------------------------------------------- #

# Colors
red="\e[31m"
green="\e[32m"
yellow="\e[33m"
normal="\e[0m"

function alert_die() {
  local error="${1}"

  print_new_line
  alert "Error: ${error}"
  die
}

function print() {
  echo "${*}"
}

function print_error() {
  print >&2 "${*}"
}

function print_new_line() {
  print ""
}

# Prints a green success message.
function success() {
  print "${green}${*}${normal}"
}

# Prints a yellow warning message.
function warning() {
  print "${yellow}${*}${normal}"
}

# Prints a red error message.
function alert() {
  print_error "${red}${*}${normal}"
}

# Wrapper for "exit" when error.
function die() {
  exit 1
}

# Wrapper for "exit" without error.
function close() {
  exit 0
}

# Remove directory and its files.
function remove() {
  print "Remove ${1}"
  rm -rf "${1}"
}

# Remove files in a directory from a pattern.
function remove_by_pattern() {
  local target_dir=${1}
  local target_files=$2

  if [[ ! -d $target_dir ]]; then
    warning "$target_dir already removed: skipped"
    return 0
  fi

  print "Remove $target_files in $target_dir"
  find "$target_dir" -name "$target_files" -delete
}

# ---------------------------------------------- #
#                    Uninstall                   #
# ---------------------------------------------- #

function help() {
  cat <<EOF

Uninstall dotfiles.

Syntax: $0

Options:
  -h, --help:     Show this message"

EOF
}

function uninstall_zsh() {
  sudo apt remove -y zsh

  remove "${HOME}"/.zinit
  remove_by_pattern "${HOME}" .zcompdump*
  remove "${HOME}"/.cache/p10k*
  remove_by_pattern "${HOME}"/.cache p10k*
  remove "${HOME}"/.p10k.zsh
  remove_by_pattern "${HOME}" .zsh*
  remove "${HOME}"/.config/lsd
  remove "${HOME}"/.config/znt
  remove "${HOME}/.cache/gitstatus"

  success "✓ zinit uninstalled"
}

function uninstall_fonts() {
  fonts_dir=${HOME}/.local/share/fonts

  remove_by_pattern "${fonts_dir}" Fura*Code*.ttf

  success "✓ Fonts uninstalled"
}

function uninstall_asdf() {
  remove "${HOME}/.asdf"
  remove "${HOME}/.tool-versions"

  sed -i "/^. \$HOME\/.asdf\/asdf.sh$/d" "${dot_bashrc}"
  sed -i "/^. \$HOME\/.asdf\/completions\/asdf.bash$/d" "${dot_bashrc}"

  success "✓ asdf uninstalled"
}

function remove_wsl_gpg() {
  remove "${HOME}/.gnupg/gpg-agent.conf"

  gpg-connect-agent reloadagent /bye

  success "✓ Setup for SSH for WSL removed"
}

function remove_wsl_ssh() {
  sudo apt remove -y keychain

  remove "${HOME}/.keychain"

  sed -i "/^eval \"\$(keychain --eval --agents ssh id_rsa)\"$/d" "${dot_bashrc}"

  success "✓ Setup for GPG for WSL removed"
}

function parse_options() {
  for opt in "$@"; do
    case $opt in
      -h | --help)
        help
        close
        ;;
      --* | -*)
        alert "Error: Unknown option $opt"
        help
        die
        ;;
    esac
  done
}

function uninstall() {
  remove_wsl_ssh
  remove_wsl_gpg
  uninstall_fonts
  uninstall_zsh
  uninstall_asdf

  success "✓ Uninstall done"
}

parse_options "$@"

dot_bashrc="${HOME}/.bashrc"

uninstall "$@"