pygments_parser.py exception: KeyError: '.Bat'

[skywind3000]

I am here because found your name in the head of pygments_parser.py, and google tells me you have a project here.

Running gnu global 6.6.2 on windows with pygments_parser.py, I encountered this:

E:\Lesson\lesson>gtags
Traceback (most recent call last):
  File "d:\acm\github\support\tools\gtags\bin\../share/gtags/script/pygments_parser.py", line 259, in <module>
    main()
  File "d:\acm\github\support\tools\gtags\bin\../share/gtags/script/pygments_parser.py", line 256, in main
    handle_requests(langmap, parser_options)
  File "d:\acm\github\support\tools\gtags\bin\../share/gtags/script/pygments_parser.py", line 218, in handle_requests
    tags = parser.parse(path)
  File "d:\acm\github\support\tools\gtags\bin\../share/gtags/script/pygments_parser.py", line 175, in parse
    ref_result = self.ref_parser.parse(path)
  File "d:\acm\github\support\tools\gtags\bin\../share/gtags/script/pygments_parser.py", line 104, in parse
    lexer = self.get_lexer_by_langmap(path)
  File "d:\acm\github\support\tools\gtags\bin\../share/gtags/script/pygments_parser.py", line 114, in get_lexer_by_langmap
    lang = self.langmap[ext]
KeyError: '.Bat'
gtags: unexpected EOF.

after looking into pygments_parser.py, I found:

    def get_lexer_by_langmap(self, path):
        ext = os.path.splitext(path)[1]
 ->     lang = self.langmap[ext]
        if lang:
            name = lang.lower()
            if name in LANGUAGE_ALIASES:
                name = LANGUAGE_ALIASES[name]
            lexer = pygments.lexers.get_lexer_by_name(name)
            return lexer
        return None

the third line cannot handle extnames which don't exist in the langmap, and should be fixed as:

-     lang = self.langmap[ext]
+     lang = self.langmap.get(ext, None)

same problem in pygments_parser.py.in:

https://github.com/yoshizow/global-pygments-plugin/blob/aebed6d2c77c01c82319aa6577c3b51c57e20ecc/pygments_parser.py.in#L105-L110

[skywind3000]

Would you please make a patch to pygments_parser.py in gnu global after fixing this ?

[skywind3000]

It can be reproduced easily on Windows, just put an empty "hello.Bat" (keep the first letter of .bat upcase) file in your project, than run gtags with pygments label enabled.

[skywind3000]

I believe, gtags will lower case ext-names on windows, but pygments_parser.py won't, that works fine on linux but will crash on windows when you got a .C, .Cpp, .Py or .Bat filename.