add ydb deps

1 files changed, 172 insertions, 0 deletions

diff --git a/contrib/python/ipython-genutils/py3/ipython_genutils/path.py b/contrib/python/ipython-genutils/py3/ipython_genutils/path.py
new file mode 100644
index 0000000000..8d3308ed55
--- /dev/null
+++ b/contrib/python/ipython-genutils/py3/ipython_genutils/path.py
@@ -0,0 +1,172 @@
+# encoding: utf-8
+"""
+Utilities for path handling.
+"""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import os
+import sys
+import errno
+import shutil
+import random
+
+from . import py3compat
+
+
+fs_encoding = sys.getfilesystemencoding()
+
+
+def filefind(filename, path_dirs=None):
+    """Find a file by looking through a sequence of paths.
+
+    This iterates through a sequence of paths looking for a file and returns
+    the full, absolute path of the first occurence of the file.  If no set of
+    path dirs is given, the filename is tested as is, after running through
+    :func:`expandvars` and :func:`expanduser`.  Thus a simple call::
+
+        filefind('myfile.txt')
+
+    will find the file in the current working dir, but::
+
+        filefind('~/myfile.txt')
+
+    Will find the file in the users home directory.  This function does not
+    automatically try any paths, such as the cwd or the user's home directory.
+
+    Parameters
+    ----------
+    filename : str
+        The filename to look for.
+    path_dirs : str, None or sequence of str
+        The sequence of paths to look for the file in.  If None, the filename
+        need to be absolute or be in the cwd.  If a string, the string is
+        put into a sequence and the searched.  If a sequence, walk through
+        each element and join with ``filename``, calling :func:`expandvars`
+        and :func:`expanduser` before testing for existence.
+
+    Returns
+    -------
+    Raises :exc:`IOError` or returns absolute path to file.
+    """
+
+    # If paths are quoted, abspath gets confused, strip them...
+    filename = filename.strip('"').strip("'")
+    # If the input is an absolute path, just check it exists
+    if os.path.isabs(filename) and os.path.isfile(filename):
+        return filename
+
+    if path_dirs is None:
+        path_dirs = ("",)
+    elif isinstance(path_dirs, py3compat.string_types):
+        path_dirs = (path_dirs,)
+
+    for path in path_dirs:
+        if path == '.': path = py3compat.getcwd()
+        testname = expand_path(os.path.join(path, filename))
+        if os.path.isfile(testname):
+            return os.path.abspath(testname)
+
+    raise IOError("File %r does not exist in any of the search paths: %r" %
+                  (filename, path_dirs) )
+
+
+def expand_path(s):
+    """Expand $VARS and ~names in a string, like a shell
+
+    :Examples:
+
+       In [2]: os.environ['FOO']='test'
+
+       In [3]: expand_path('variable FOO is $FOO')
+       Out[3]: 'variable FOO is test'
+    """
+    # This is a pretty subtle hack. When expand user is given a UNC path
+    # on Windows (\\server\share$\%username%), os.path.expandvars, removes
+    # the $ to get (\\server\share\%username%). I think it considered $
+    # alone an empty var. But, we need the $ to remains there (it indicates
+    # a hidden share).
+    if os.name=='nt':
+        s = s.replace('$\\', 'IPYTHON_TEMP')
+    s = os.path.expandvars(os.path.expanduser(s))
+    if os.name=='nt':
+        s = s.replace('IPYTHON_TEMP', '$\\')
+    return s
+
+
+try:
+    ENOLINK = errno.ENOLINK
+except AttributeError:
+    ENOLINK = 1998
+
+def link(src, dst):
+    """Hard links ``src`` to ``dst``, returning 0 or errno.
+
+    Note that the special errno ``ENOLINK`` will be returned if ``os.link`` isn't
+    supported by the operating system.
+    """
+
+    if not hasattr(os, "link"):
+        return ENOLINK
+    link_errno = 0
+    try:
+        os.link(src, dst)
+    except OSError as e:
+        link_errno = e.errno
+    return link_errno
+
+
+def link_or_copy(src, dst):
+    """Attempts to hardlink ``src`` to ``dst``, copying if the link fails.
+
+    Attempts to maintain the semantics of ``shutil.copy``.
+
+    Because ``os.link`` does not overwrite files, a unique temporary file
+    will be used if the target already exists, then that file will be moved
+    into place.
+    """
+
+    if os.path.isdir(dst):
+        dst = os.path.join(dst, os.path.basename(src))
+
+    link_errno = link(src, dst)
+    if link_errno == errno.EEXIST:
+        if os.stat(src).st_ino == os.stat(dst).st_ino:
+            # dst is already a hard link to the correct file, so we don't need
+            # to do anything else. If we try to link and rename the file
+            # anyway, we get duplicate files - see http://bugs.python.org/issue21876
+            return
+
+        new_dst = dst + "-temp-%04X" %(random.randint(1, 16**4), )
+        try:
+            link_or_copy(src, new_dst)
+        except:
+            try:
+                os.remove(new_dst)
+            except OSError:
+                pass
+            raise
+        os.rename(new_dst, dst)
+    elif link_errno != 0:
+        # Either link isn't supported, or the filesystem doesn't support
+        # linking, or 'src' and 'dst' are on different filesystems.
+        shutil.copy(src, dst)
+
+
+def ensure_dir_exists(path, mode=0o755):
+    """ensure that a directory exists
+    
+    If it doesn't exist, try to create it and protect against a race condition
+    if another process is doing the same.
+    
+    The default permissions are 755, which differ from os.makedirs default of 777.
+    """
+    if not os.path.exists(path):
+        try:
+            os.makedirs(path, mode=mode)
+        except OSError as e:
+            if e.errno != errno.EEXIST:
+                raise
+    elif not os.path.isdir(path):
+        raise IOError("%r exists but is not a directory" % path)