old_contents: import logging
  import os
  
  LOGGER = logging.getLogger(__name__)
  
  class NoRepoFoundError(Exception):
      pass
  
  class PreCommitExists(Exception):
      pass
  
  def find_git_repo():
      location = os.path.abspath('.')
      while location != '/':
          check = os.path.join(location, '.git')
          if os.path.exists(check) and os.path.isdir(check):
              return check
          location = os.path.dirname(location)
      raise NoRepoFoundError("Could not find a git repository (.git) in {}".format(os.path.abspath('.')))
  
  HOOK_CONTENT = """
  mothermayi run
  """
  
  def write_hook(pre_commit):
      with open(pre_commit, 'w') as f:
          f.write(HOOK_CONTENT)
  
  def install():
      repo = find_git_repo()
      LOGGER.debug("Found git repo at %s", repo)
      hooks = os.path.join(repo, 'hooks')
      pre_commit = os.path.join(hooks, 'pre-commit')
      if os.path.exists(pre_commit):
          raise PreCommitExists("A git hook already exists at {}. Refusing to overwrite. Please remove it manually".format(pre_commit))
      write_hook(pre_commit)
  
new_contents: import logging
  import os
  
  LOGGER = logging.getLogger(__name__)
  
  class NoRepoFoundError(Exception):
      pass
  
  class PreCommitExists(Exception):
      pass
  
  def find_git_repo():
      location = os.path.abspath('.')
      while location != '/':
          check = os.path.join(location, '.git')
          if os.path.exists(check) and os.path.isdir(check):
              return check
          location = os.path.dirname(location)
      raise NoRepoFoundError("Could not find a git repository (.git) in {}".format(os.path.abspath('.')))
  
  HOOK_CONTENT = """
  mothermayi pre-commit
  """
  
  def write_hook(pre_commit):
      with open(pre_commit, 'w') as f:
          f.write(HOOK_CONTENT)
  
  def install():
      repo = find_git_repo()
      LOGGER.debug("Found git repo at %s", repo)
      hooks = os.path.join(repo, 'hooks')
      pre_commit = os.path.join(hooks, 'pre-commit')
      if os.path.exists(pre_commit):
          raise PreCommitExists("A git hook already exists at {}. Refusing to overwrite. Please remove it manually".format(pre_commit))
      write_hook(pre_commit)
  
subject: Make the hook content say the right thing