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#!/usr/bin/python -u
# Copyright 2012 Linaro.
"""Allow accessing .git directories without '.git' in the name.
To be used with Apache2 mod_rewrite RewriteMap functionality.
This means that "-u" option to python interpreter above is important
for unbuffered output.
"""
import os
BASE_PATH = '/srv/repositories'
def relativize_path(path):
"""Ensure `path` does not start with '/'."""
path = os.path.normpath(path)
if path[0] == os.sep:
path = path[1:]
return path
def rewrite_path(base_path, file_path):
"""Return a rewritten path with '.git' added where necessary.
Looks for all the directories with '.git' appended that exist
on disk in `base_path`/`file_path` right-to-left until it finds it.
Returns None if `file_path` can not be matched, otherwise,
returns a matched file path relative to `base_path`.
"""
file_path = relativize_path(file_path)
full_path = os.path.join(base_path, file_path)
dirname, current = os.path.split(full_path)
filename = ''
while current != '':
git_dirname = os.path.join(dirname, current)
git_dirname2 = git_dirname + '.git'
# If git_dirname does not exist but a variant with '.git'
# appended does, use the version with '.git' appended.
if os.path.isdir(git_dirname2):
if not os.path.isdir(git_dirname):
git_dirname = git_dirname2
else:
# In case both .git and .git-less dir exists, prefer .git if
# we access files/dirs usually located within .git dir.
for internal in ["info/", "objects/", "refs/", "branches/", "logs/"]:
if filename.startswith(internal):
git_dirname = git_dirname2
break
# 'filename' is a string representing the right-hand side
# of the path being looked at.
if filename:
file_path = os.path.join(git_dirname, filename)
filename = os.path.join(current, filename)
else:
file_path = git_dirname
filename = current
if os.path.exists(file_path):
return os.path.relpath(file_path, base_path)
dirname, current = os.path.split(dirname)
return None
if __name__ == '__main__':
while True:
request_path = raw_input()
desired_path = rewrite_path(BASE_PATH, request_path)
if desired_path is None:
print request_path
else:
if request_path.startswith(os.sep):
print "/" + desired_path
else:
print desired_path
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