brew-uninstall-mysql

#!/usr/bin/env bash

set -o errexit
set -o pipefail
set -o nounset
# set -o xtrace

shopt -s extglob

declare PKGNAME

main() {
  echo "$0"
  PKGNAME="$1"
  verify_macos
  kill_processes
  uninstall_mysql
}

verify_macos() {
  local os
  os="$(uname)"
  [[ "${os}" != 'Darwin' ]] && fail $? 'This script only works on MacOS'
  return 0
}

kill_processes() {
  msg1 "Processes using 'mysql':"
  ps -ax | grep 'mysql' | grep -v 'grep mysql' | grep -v "$0" || [[ $? == 1 ]]
  msg1 "If any processes were listed above which use 'mysql', kill them (in another terminal)"
  read -rp 'Press any key to continue:'
}

uninstall_mysql() {
  msg1 "Uninstalling '${PKGNAME}':"
  sudo -v
  brew remove "${PKGNAME}" || fail $? "Failed to run \"brew remove '${PKGNAME}'\""
  brew cleanup
  rm_file '/usr/local/mysql'
  rm_dir '/usr/local/var/mysql'
  rm_dir '/usr/local/mysql'*
  rm_file "${HOME}/Library/LaunchAgents/homebrew.mxcl.mysql.plist"
  rm_dir '/Library/StartupItems/MySQLCOM'
  rm_dir '/Library/PreferencePanes/My'*
  launchctl unload -w "${HOME}/Library/LaunchAgents/homebrew.mxcl.mysql.plist"
  # edit /etc/hostconfig and remove the line MYSQLCOM=-YES-
  rm_dir "${HOME}/Library/PreferencePanes/My"*
  rm_dir '/Library/Receipts/mysql'*
  rm_dir '/Library/Receipts/MySQL'*
  rm_dir '/private/var/db/receipts/'*'mysql'*
}

rm_file() {
  local -r fpath="$1"
  [[ -f "${fpath}" ]] && sudo rm "${fpath}"
}

rm_dir() {
  local -r dpath="$1"
  # [[ -d "${dpath}" ]] && sudo rm -rf "${dpath}"
  sudo rm -rf "${dpath}"
}

fail() {
  local -r scode="$1"
  local -r msg="$2"
  err "${msg}"
  exit "${scode}"
}

err() {
  local -r msg="$1"
  echo "[$(timestamp)]: ${msg}" >&2
}

msg1() {
  local -r msg="$1"
  echo "[$(timestamp)]: ${msg}"
}

timestamp() {
  date +'%Y-%m-%d %H:%M:%S'
  # date +'%Y-%m-%dT%H:%M:%S%z'
  # date -u +'%Y-%m-%dT%H:%M:%SZ'
}

main "$@"