Fix No such file or directory: '' error

[katsusuke]

#138

I also encountered the same issue.

My current computer is following envrionment. Machine: M1 Macbook Air OS: macOS Monterey 12.6 Python: 3.10.6

$ python migrate.py -bu katsusuke "my-organization/my-repo" "my-organization/myrepo" katsusuke
Traceback (most recent call last):
  File "/Users/katsusuke/git/github.com/jeffwidman/bitbucket-issue-migration/migrate.py", line 897, in <module>
    sys.exit(main(options))
  File "/Users/katsusuke/git/github.com/jeffwidman/bitbucket-issue-migration/migrate.py", line 142, in main
    users_bb_gh_mapping = [line.rstrip() for line in open(''.join(options._map_users), "r")]
FileNotFoundError: [Errno 2] No such file or directory: ''

python --version
Python 3.10.6

I think open('') throws FileNotFoundError.

$ python
Python 3.10.6 (main, Aug 24 2022, 13:55:36) [Clang 13.1.6 (clang-1316.0.21.2.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> open("")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
FileNotFoundError: [Errno 2] No such file or directory: ''

I tried it on Linux, but open function have the same behavior.

$ uname -a
uname -a
Linux ip-10-0-10-74 5.13.0-1022-aws #24~20.04.1-Ubuntu SMP Thu Apr 7 22:10:15 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.3 LTS"
$ python3
Python 3.8.10 (default, Mar 15 2022, 12:22:08)
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> open('')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
FileNotFoundError: [Errno 2] No such file or directory: ''