[New-bugs-announce] [issue31583] 2to3 call for file in current directory yields error

[Denis Osipov]

New submission from Denis Osipov:

2to3 doesn't work if called for file in current directory with --add-suffix option.
	
$ /d/repos/cpython/python.bat /d/repos/cpython/Tools/scripts/2to3 -n -W --add-suffix=3 test2to3.py
Running Debug|x64 interpreter...
WARNING: --write-unchanged-files/-W implies -w.
RefactoringTool: Skipping optional fixer: buffer
RefactoringTool: Skipping optional fixer: idioms
RefactoringTool: Skipping optional fixer: set_literal
RefactoringTool: Skipping optional fixer: ws_comma
RefactoringTool: Refactored test2to3.py
--- test2to3.py (original)
+++ test2to3.py (refactored)

--some changes--

Traceback (most recent call last):
  File "D:/repos/cpython/Tools/scripts/2to3", line 5, in <module>
    sys.exit(main("lib2to3.fixes"))
  File "D:\repos\cpython\lib\lib2to3\main.py", line 259, in main
    options.processes)
  File "D:\repos\cpython\lib\lib2to3\refactor.py", line 687, in refactor
    items, write, doctests_only)
  File "D:\repos\cpython\lib\lib2to3\refactor.py", line 282, in refactor
    self.refactor_file(dir_or_file, write, doctests_only)
  File "D:\repos\cpython\lib\lib2to3\refactor.py", line 728, in refactor_file
    *args, **kwargs)
  File "D:\repos\cpython\lib\lib2to3\refactor.py", line 339, in refactor_file
    write=write, encoding=encoding)
  File "D:\repos\cpython\lib\lib2to3\refactor.py", line 505, in processed_file
    self.write_file(new_text, filename, old_text, encoding)
  File "D:\repos\cpython\lib\lib2to3\main.py", line 84, in write_file
    os.makedirs(output_dir)
  File "D:\repos\cpython\\lib\os.py", line 221, in makedirs
    mkdir(name, mode)
FileNotFoundError: [WinError 3] The system cannot find the path specified: ''


It works well if I use absolute path for target file or set -o:

$ /d/repos/cpython/python.bat /d/repos/cpython/Tools/scripts/2to3 -n -W --add-suffix=3 /d/MyPythonScripts/test2to3.py

$ /d/repos/cpython/python.bat /d/repos/cpython/Tools/scripts/2to3 -n -W --add-suffix=3 -o . test2to3.py

----------
components: 2to3 (2.x to 3.x conversion tool)
messages: 303001
nosy: denis-osipov
priority: normal
severity: normal
status: open
title: 2to3 call for file in current directory yields error
type: behavior
versions: Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31583>
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