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dupeguru/hscommon/conflict.py
Andrew Senetar 7ba8aa3514
Format files with black
- Format all files with black
- Update tox.ini flake8 arguments to be compatible
- Add black to requirements-extra.txt
- Reduce ignored flake8 rules and fix a few violations
2019-12-31 20:16:27 -06:00

89 lines
2.8 KiB
Python

# Created By: Virgil Dupras
# Created On: 2008-01-08
# Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
# This software is licensed under the "GPLv3" License as described in the "LICENSE" file,
# which should be included with this package. The terms are also available at
# http://www.gnu.org/licenses/gpl-3.0.html
"""When you have to deal with names that have to be unique and can conflict together, you can use
this module that deals with conflicts by prepending unique numbers in ``[]`` brackets to the name.
"""
import re
import os
import shutil
from .path import Path, pathify
# This matches [123], but not [12] (3 digits being the minimum).
# It also matches [1234] [12345] etc..
# And only at the start of the string
re_conflict = re.compile(r"^\[\d{3}\d*\] ")
def get_conflicted_name(other_names, name):
"""Returns name with a ``[000]`` number in front of it.
The number between brackets depends on how many conlicted filenames
there already are in other_names.
"""
name = get_unconflicted_name(name)
if name not in other_names:
return name
i = 0
while True:
newname = "[%03d] %s" % (i, name)
if newname not in other_names:
return newname
i += 1
def get_unconflicted_name(name):
"""Returns ``name`` without ``[]`` brackets.
Brackets which, of course, might have been added by func:`get_conflicted_name`.
"""
return re_conflict.sub("", name, 1)
def is_conflicted(name):
"""Returns whether ``name`` is prepended with a bracketed number.
"""
return re_conflict.match(name) is not None
@pathify
def _smart_move_or_copy(operation, source_path: Path, dest_path: Path):
"""Use move() or copy() to move and copy file with the conflict management.
"""
if dest_path.isdir() and not source_path.isdir():
dest_path = dest_path[source_path.name]
if dest_path.exists():
filename = dest_path.name
dest_dir_path = dest_path.parent()
newname = get_conflicted_name(os.listdir(str(dest_dir_path)), filename)
dest_path = dest_dir_path[newname]
operation(str(source_path), str(dest_path))
def smart_move(source_path, dest_path):
"""Same as :func:`smart_copy`, but it moves files instead.
"""
_smart_move_or_copy(shutil.move, source_path, dest_path)
def smart_copy(source_path, dest_path):
"""Copies ``source_path`` to ``dest_path``, recursively and with conflict resolution.
"""
try:
_smart_move_or_copy(shutil.copy, source_path, dest_path)
except IOError as e:
if e.errno in {
21,
13,
}: # it's a directory, code is 21 on OS X / Linux and 13 on Windows
_smart_move_or_copy(shutil.copytree, source_path, dest_path)
else:
raise