Revert of shutil recipe_module: port chromium_utils rmtree implementation.

recipe_modules/shutil/resources/rmtree.py

-# Copyright 2016 The LUCI Authors. All rights reserved.
-# Use of this source code is governed under the Apache License, Version 2.0
-# that can be found in the LICENSE file.
-
-# Copy of RemoveDirectory from scripts/common/chromium_utils.
-# See also http://crbug.com/584783.
-# The only difference is that now the method will properly report failures.
-# The recipe can choose to ignore them explicitely with ok_ret='any'.
-
-import argparse
-import os
-import shutil
-import subprocess
-import sys
-import time
-
-
-def RemoveDirectory(file_path):
-  """Recursively removes a directory, even if it's marked read-only.
-
-  Remove the directory located at *path, if it exists.
-
-  shutil.rmtree() doesn't work on Windows if any of the files or directories
-  are read-only, which svn repositories and some .svn files are.  We need to
-  be able to force the files to be writable (i.e., deletable) as we traverse
-  the tree.
-
-  Even with all this, Windows still sometimes fails to delete a file, citing
-  a permission error (maybe something to do with antivirus scans or disk
-  indexing).  The best suggestion any of the user forums had was to wait a
-  bit and try again, so we do that too.  It's hand-waving, but sometimes it
-  works. :/
-  """
-  if not os.path.exists(file_path):
-    return 0
-
-  if sys.platform == 'win32':
-    # Give up and use cmd.exe's rd command.
-    file_path = os.path.normcase(file_path)
-    for _ in xrange(3):
-      print 'RemoveDirectory running %s' % (' '.join(
-          ['cmd.exe', '/c', 'rd', '/q', '/s', file_path]))
-      if not subprocess.call(['cmd.exe', '/c', 'rd', '/q', '/s', file_path]):
-        return 0
-      print '  Failed'
-      time.sleep(3)
-    return 1
-
-  def RemoveWithRetry_non_win(rmfunc, path):
-    if os.path.islink(path):
-      return os.remove(path)
-    else:
-      return rmfunc(path)
-
-  remove_with_retry = RemoveWithRetry_non_win
-
-  def RmTreeOnError(function, path, excinfo):
-    r"""This works around a problem whereby python 2.x on Windows has no ability
-    to check for symbolic links.  os.path.islink always returns False.  But
-    shutil.rmtree will fail if invoked on a symbolic link whose target was
-    deleted before the link.  E.g., reproduce like this:
-    > mkdir test
-    > mkdir test\1
-    > mklink /D test\current test\1
-    > python -c "import chromium_utils; chromium_utils.RemoveDirectory('test')"
-    To avoid this issue, we pass this error-handling function to rmtree.  If
-    we see the exact sort of failure, we ignore it.  All other failures we re-
-    raise.
-    """
-
-    exception_type = excinfo[0]
-    exception_value = excinfo[1]
-    # If shutil.rmtree encounters a symbolic link on Windows, os.listdir will
-    # fail with a WindowsError exception with an ENOENT errno (i.e., file not
-    # found).  We'll ignore that error.  Note that WindowsError is not defined
-    # for non-Windows platforms, so we use OSError (of which it is a subclass)
-    # to avoid lint complaints about an undefined global on non-Windows
-    # platforms.
-    if (function is os.listdir) and issubclass(exception_type, OSError):
-      if exception_value.errno == errno.ENOENT:
-        # File does not exist, and we're trying to delete, so we can ignore the
-        # failure.
-        print 'WARNING:  Failed to list %s during rmtree.  Ignoring.\n' % path
-      else:
-        raise
-    else:
-      raise
-
-  for root, dirs, files in os.walk(file_path, topdown=False):
-    # For POSIX:  making the directory writable guarantees removability.
-    # Windows will ignore the non-read-only bits in the chmod value.
-    os.chmod(root, 0770)
-    for name in files:
-      remove_with_retry(os.remove, os.path.join(root, name))
-    for name in dirs:
-      remove_with_retry(lambda p: shutil.rmtree(p, onerror=RmTreeOnError),
-                        os.path.join(root, name))
-
-  remove_with_retry(os.rmdir, file_path)
-  return 0
-
-
-def main(args):
-  parser = argparse.ArgumentParser()
-  parser.add_argument('path', help='Absolute path to remove')
-  options = parser.parse_args(args)
-  return RemoveDirectory(options.path)
-
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv[1:]))