luacheck requires a real path to a directory?

[Totktonada]

I found that under the following circumstances I need to pass a real directory path (with resolved symlinks) to the luacheck executable in order to don't miss warnings:

1. .luacheckrc in a project root have include_files with some globs.
2. The current directory is non-real path to the project root.
3. The argument to luacheck is the same non-real path.

How to reproduce:

$ mkdir -p "${HOME}"/tmp/test-luacheck/aaa  # project root
$ cd "${HOME}"/tmp/test-luacheck/aaa
$ echo 'foo = 42' > foo.lua
$ echo "include_files = {'**/*.lua'}" > .luacheckrc
$ luacheck --config .luacheckrc "${HOME}"/tmp/test-luacheck/aaa
Checking /home/alex/tmp/test-luacheck/aaa/foo.lua 1 warning

    /home/alex/tmp/test-luacheck/aaa/foo.lua:1:1: setting non-standard global variable foo

Total: 1 warning / 0 errors in 1 file
$ cd ..
$ ln -s aaa bbb
$ cd bbb
$ luacheck --config .luacheckrc "${HOME}"/tmp/test-luacheck/bbb
Total: 0 warnings / 0 errors in 0 files
$ cd .. && tree
.
├── aaa
│   └── foo.lua
└── bbb -> aaa

2 directories, 1 file

I step into this problem, because I use symlinks to ease access to directories that I use often. I'm not sure this is broad approach, but I hope it is valid. At least, it seems, it does not contradict with the current luacheck documentation.

(I'm aware about the status of the repository, but I think that issues should be filed here until the repository will be properly migrated: otherwise we'll have several issue numerations.)

[Totktonada]

I also found that even if I pass the real path, but the current working directory is different, the files are missed:

$ pwd
/home/alex/tmp/test-luacheck
$ mkdir ccc
$ cd ccc
$ luacheck --config ../aaa/.luacheckrc /home/alex/tmp/test-luacheck/aaa
Total: 0 warnings / 0 errors in 0 files

[ligurio]

I suggest to resolve specified path using readlink, it works:

Total: 1 warning / 0 errors in 1 file
sergeyb@pony:~/sources/MRG/ttt$ luacheck --config .luacheckrc /home/sergeyb/sources/MRG/ttt
Total: 0 warnings / 0 errors in 0 files
sergeyb@pony:~/sources/MRG/ttt$ luacheck --config .luacheckrc $(readlink /home/sergeyb/sources/MRG/ttt)
Checking /home/sergeyb/sources/MRG/tt/test.lua    1 warning

    /home/sergeyb/sources/MRG/tt/test.lua:1:1: setting non-standard global variable a

Total: 1 warning / 0 errors in 1 file
sergeyb@pony:~/sources/MRG/ttt$ 

[Totktonada]

@ligurio It seems it works only when .luacheckrc can be found by upward directories traversal. See #208 (comment).