Git pre-commit hook to prevent accidental mistakes

pre-commit.rb

#!/usr/bin/env ruby
# vim: set syntax=ruby

TESTS = [
  [
    :has_no_staged_migrations,
    %x[ git status -s| egrep "^\?\?\sdb\/migrate/.+\.rb$" ].empty?,
    "You probably forgot to add newly created migrations."
  ],
  [
    :db_config_not_changed,
    %x[ git status -s| egrep "^\sM\sconfig\/database\.yml$" ].empty?,
    "DB config has changed accidentally?!"
  ]
]

def tests_passed?(checklist)
  passed = true
  checklist.each do |test_item|
    unless test_item[1]
      puts "\e[3m\33[1;31m \tSTOP! #{test_item[2]}\33[m\e[0m"
      passed = false
    end
  end
  passed
end

exit( tests_passed?(TESTS) ? 0 : 1 )