将路径扩展名 \\?\ 用于 windows 7 和 python 脚本

Question

我正在使用工具 ac2git to convert my Accurev depot to git repository. I'm facing a problem when the os.walk() function in the python file runs. Since my project has a pretty complicated build path I have nested files that have path length exceeding the 260 limitation on Windows 7.I tried using the work-arounds provided by microsoft support，但它没有解决错误。我仍然收到错误 [Winerror 3]: File not found ，实际上它存在但由于长度限制而无法访问。

这是 ac2git.py 脚本中的部分代码：

def PreserveEmptyDirs(self):
    preservedDirs = []
    for root, dirs, files in os.walk(self.gitRepo.path, topdown=True):
        for name in dirs:

            path ="\\?\"+ToUnixPath(os.path.join(root, name))


            # Preserve empty directories that are not under the .git/ directory.
            if git.GetGitDirPrefix(path) is None and len(os.listdir(path)) == 0:
                filename = os.path.join(path, '.gitignore')
                with codecs.open(filename, 'w', 'utf-8') as file:
                    #file.write('# accurev2git.py preserve empty dirs\n')
                    preservedDirs.append(filename)
                if not os.path.exists(filename):
                    logger.error("Failed to preserve directory. Couldn't create '{0}'.".format(filename))
    return preservedDirs


def ToUnixPath(path):
rv = SplitPath(path)
if rv is not None:
    if rv[0] == '/':
        rv = '/' + '/'.join(rv[1:])
    else:
        rv = '/'.join(rv)
return rv

def SplitPath(path):
rv = None
if path is not None:
    path = str(path)
    rv = []
    drive, path = os.path.splitdrive(path)
    head, tail = os.path.split(path)
    while len(head) > 0 and head != '/' and head != '\': # For an absolute path the starting slash isn't removed from head.
        rv.append(tail)
        head, tail = os.path.split(head)
    if len(tail) > 0:
        rv.append(tail)
    if len(head) > 0: # For absolute paths.
        rv.append(head)
    if len(drive) > 0:
        rv.append(drive)
    rv.reverse()
return rv

我附加了“\\?\”以允许更长的路径长度，但现在我收到此错误：

FileNotFoundError: [WinError 3] The system cannot find the path specified: '\\?\C:///s/cms'

我是 Python 的新手，我不太确定解决它的正确方法是什么。我只能继续使用 Windows 7。如果这个问题可以通过其他方式解决，有什么建议吗？

Answer 1

所以费了九牛二虎之力，我对python代码进行了修改，

显然此信息非常重要" File I/O Windows API 中的函数将“/”转换为“\”作为转换名称的一部分到 NT 样式的名称，除非使用“\?\”前缀，如以下部分所述。"

所以我刚刚将这段代码添加到函数中：

def ToUnixPath(path):
rv = SplitPath(path)
rv[:] = [item for item in rv if item != '/']
     rv = '\'.join(rv)
     return r"\?"+"\"+rv

成功了！

将路径扩展名 \\?\ 用于 windows 7 和 python 脚本

Using path extension \\?\ for windows 7 with python script

python

git

accurev

windows-7-x64