[Zope-CVS] CVS: Packages/zpkgtools/zpkgtools - svnloader.py:1.1

[Fred L. Drake, Jr.]

Update of /cvs-repository/Packages/zpkgtools/zpkgtools
In directory cvs.zope.org:/tmp/cvs-serv9205

Added Files:
	svnloader.py 
Log Message:
start code to support Subversion


=== Added File Packages/zpkgtools/zpkgtools/svnloader.py ===
##############################################################################
#
# Copyright (c) 2004 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Subversion support functions."""

import os
import sys
import urllib
import urlparse

if sys.platform[:3].lower() == "win":
    ROOTDIR = "\\"
else:
    ROOTDIR = "/"


def is_subversion_url(url):
    """Return `True` if the URL should be used for Subversion."""
    type, rest = urllib.splittype(url)
    if type in ("svn", "svn+ssh"):
        return True
    if type == "file":
        if not url.startswith("file://"):
            return False
        parts = urlparse.urlsplit(url)
        if not parts[1] in ("", "localhost"):
            return False
        path = urllib.url2pathname(parts[2])
        # need to look for a subversion repository along the path
        while path and path != ROOTDIR and not os.path.exists(path):
            path = os.path.dirname(path)
        # path exists; is there a Subversion repository there?
        if is_repository(path):
            return True
        path = os.path.dirname(path)
        if is_repository(path):
            return True
        path = os.path.dirname(path)
        if is_repository(path):
            return True
    # We just don't handle http: and https: repositories, and I've no
    # idea how to detect them yet.
    return False


REPOSITORY_CONTENT = [
    # name, isdir
    ("conf", True),
    ("dav", True),
    (os.path.join("db", "DB_CONFIG"), False),
    ("hooks", True),
    ("locks", True),
    ]

def is_repository(path):
    # internal use
    """Return true if `path` is a Subversion repository.

    This uses some general expectations of what the repository is
    supposed to look like; some repositories may not have everything
    this looks for, but that's pretty unlikely.
    """
    if not os.path.isdir(path):
        return False
    for name, isdir in REPOSITORY_CONTENT:
        fn = os.path.join(path, name)
        if isdir:
            ok = os.path.isdir(fn)
        else:
            ok = os.path.isfile(fn)
        if not ok:
            return False
    return True