Get all parent directories of a given path

iter_parent_dirs.py

import os

def iter_parent_dirs(endpath):
	previous = ''
	basepath = endpath
	while previous != '/':
		yield basepath
		previous = basepath
		basepath, _ = os.path.split(basepath)

usage_example.py

from __future__ import print_function

import os

from iter_parent_dirs import iter_parent_dirs

for dirpath in iter_parent_dirs(os.getcwd()):
	if os.path.isdir(os.path.join(dirpath, '.git')):
		print('Found git repository at {path}'.format(path=dirpath))
	else:
		print('No git repository at {path}'.format(path=dirpath))

useful_functions.py

def find_git_repo(dirpath):
	for dirpath in iter_parent_dirs(dirpath):
		repo_path = os.path.join(dirpath, '.git')
		if os.path.isdir(repo_path):
			return repo_path
	return None

REPODIRS = ('.cvs', '.svn', '.git', '.hg', '.bzr')

def find_repo(dirpath):
	for dirpath in iter_parent_dirs(dirpath):
		for repo_dir in REPODIRS:
			repo_path = os.path.join(dirpath, repo_dir)
			if os.path.isdir(repo_path):
				return repo_path
	return None

def find_all_repos(dirpath, return_dict=False):
	if return_dict:
		repos = {}
	else:
		repos = []

	for dirpath in iter_parent_dirs(dirpath):
		for repo_dir in REPODIRS:
			repo_path = os.path.join(dirpath, repo_dir)
			if os.path.isdir(repo_path):
				if return_dict:
					key = repo_dir.lstrip('.')
					try:
						repos[key].append(repo_path)
					except KeyError:
						repos[key] = [repo_path]
				else:
					repos.append(repo_path)

	return repos