feat (fs_actions): add brace expansion for creating files / folders

[pysan3]

Hi, big thanks for the nice plugin again.

This PR aims to implement the brace expansion feature just like BASH (probly POSIX compatible?) shell as suggested in #647.

The core implementation is in require("neo-tree.utils").brace_expand(s) which handles all expansion and return a list of strings being expanded. If no expansion is found, it returns a one-element list with the raw input.

The calculation is not done by using the shell or anything and is just emulated inside lua, meaning that Windows users can also use this feature with the bash syntax.

More Testing Needed!!

I am pretty sure I was able to cover all edge cases but it would be nice if anyone could double check if I hadn't screwed up anything.
The basic syntax of bash brace expansion can be found here or here or by googling.

Here are some examples I checked myself.

Input	Output
"x{a..e..2}"	{ "xa", "xc", "xe" }
"file.txt{,.bak}"	{ "file.txt", "file.txt.bak" }
"./{a,b}/{00..02}.lua"	{ "./a/00.lua", "./a/01.lua", "./a/02.lua", "./b/00.lua", "./b/01.lua", "./b/02.lua" }

README

I would be very happy if you could mention this feature in the README.

I do not know any other file explorer-like plugin in vim / neovim that has this feature and I think this would be a killing feature against the other options :)

Best,
pysan3

[codecov]

Codecov Report

Merging #661 (3f182dc) into main (73a90f6) will decrease coverage by 0.67%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #661      +/-   ##
==========================================
- Coverage   50.28%   49.60%   -0.68%     
==========================================
  Files          47       47              
  Lines        6227     6304      +77     
==========================================
- Hits         3131     3127       -4     
- Misses       3096     3177      +81     

Impacted Files	Coverage Δ
lua/neo-tree/sources/filesystem/lib/fs_actions.lua	3.81% <0.00%> (-0.03%)	⬇️
lua/neo-tree/utils.lua	38.88% <0.00%> (-7.43%)	⬇️
lua/neo-tree/sources/filesystem/init.lua	64.40% <0.00%> (-1.70%)	⬇️

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[etrnal70]

Hello, sorry for the late response. I'm daily driving it and it works great ! I'll try to find some more edge case this weekend

[cseickel]

I'm ready to merge this based on code and functionality, but I don't want to add to the documentation problem I already have by adding more undocumented features.

Can you please add some explanation to the help file?

You can also add it to the README if you want, or just reference the entry in the help file.

[pysan3]

I'm daily driving it and it works great !

@etrnal70 Thanks for testing!

Can you please add some explanation to the help file?
You can also add it to the README if you want, or just reference the entry in the help file.

@cseickel I have added some documentation for the brace expansion feature in the help file and README.

[cseickel]

Look good @pysan3, thanks!