Crash on Windows due to improper backslash handling in autojump_match.py

[agorgl]

Executing any normal autojump command in Windows leads to this:

Traceback (most recent call last):
  File "C:\Program Files (x86)\CowShell\Vendor\AutoJump\bin\\autojump", line 320, in <module>
    sys.exit(main(parse_arguments()))
  File "C:\Program Files (x86)\CowShell\Vendor\AutoJump\bin\\autojump", line 314, in main
    ['.'])))
  File "C:\Program Files (x86)\CowShell\Vendor\AutoJump\bin\autojump_utils.py", line 42, in first
    return it.next()
  File "C:\Program Files (x86)\CowShell\Vendor\AutoJump\bin\autojump_match.py", line 86, in <lambda>
    flags=regex_flags,
  File "F:\Programs\Python\lib\re.py", line 146, in search
    return _compile(pattern, flags).search(string)
  File "F:\Programs\Python\lib\re.py", line 251, in _compile
    raise error, v # invalid expression
sre_constants.error: unexpected end of regular expression
ECHO is off.

The highlighted change here: 7c7865e#diff-4b97c2fd2ae952c567c1646bc80e5d43L78
lead to the dysfunction in Windows systems.

The proposed solution is basically changing the lines 78-80 in autojump_match.py to:

    sep = '\\\\' if os.sep == '\\' else os.sep
    regex_no_sep = '[^' + sep + ']*'
    regex_no_sep_end = regex_no_sep + '$'
    regex_one_sep = regex_no_sep + sep + regex_no_sep

(Conditionally setting the separator value used in the regex construction)

[wting]

Hey thanks for the detailed bug report!

Unfortunately I don't have access to a Windows machine. Can you update these Windows tests such that they reproduce the error you have? That way we can prevent future regression bugs.

[glucas]

Just trying out autojump on Win10 and hit this. The proposed patch seems to work for me.

[glucas]

@wting If the tests are not actually executed on Windows, won't the match_consecutive tests pick up the wrong os.sep? The tests won't actually fail unless os.sep is a backslash.

[wting]

You can mock it out for tests like so:

In [1]: import os, mock

In [2]: os.sep
Out[2]: '/'

In [3]: with mock.patch.object(os, 'sep', '\\'):
   ...:     print(os.sep)
   ...:     
\

[willyd]

I had the same problem and the suggested fix solved the problem. I guess that an alternative solution would be to run the tests on a windows CI platform such as appveyor.

[com314159]

win 10 64 , the same issue. change autojump_match.py worked. thank you.

[shukebeta]

Window 10 professional, I met this issue today....and the suggested patch works like a charm! Many thanks. I just wonder why the patch is not merged into the master while four years have been passed?