Indent fallback not working?

[nwaywood]

Neovim version (nvim -v | head -n1)

NVIM v0.8.0

Operating system/version

macOS 12.5

How to reproduce the issue

1. Use this ufo setup from the readme

   
   vim.opt.foldenable = true
   vim.opt.foldlevel = 99
   vim.opt.foldlevelstart = 99

require("ufo").setup({ provider_selector = function(bufnr, filetype, buftype) return { "treesitter", "indent" } end, })

2. Navigate to an indented section of code that doesn't have a treesitter fold
3. Try and fold with `zc`

### Expected behavior

Since no treesitter fold is found, ufo should fallback to indent folding and fold the code by indent 

### Actual behavior

The message `E490: No fold found` is displayed

[kevinhwang91]

Can't reproduce it, check out your shiftwidth, please.

[nwaywood]

@kevinhwang91 what does shiftwidth need to be set to for the indent fallback to work? Maybe that should be added to the readme?

My shiftwidth is set to 2

[kevinhwang91]

Maybe that should be added to the readme?

I don't think it's necessary for Vimer, without a correct shiftwidth value, insert a newline is always buggy.

Does the correct shiftwidth work for you?

[nwaywood]

@kevinhwang91 I don't think my shiftwidth value is the issue. I had it set to 2 and it didn't work, I just tried shiftwidth=4 and the bug is present with both values.

Do you have any other ideas what the issue might be?

If I manually set foldmethod=indent then indent based folding works

[nwaywood]

If it's relevant. I am experiencing this bug in a Scala file

[kevinhwang91]

Make sure that UfoInspect output Selected provider: indent.

Trim the issue file and post it here.

[nwaywood]

@kevinhwang91 oh wait maybe I misunderstood how the fallback works. I am in a file that has some treesitter folds but it isn't able to fold some sections of the file, I thought it is meant to fallback if there is a section of code that treesitter isn't able to fold. Is that not how it works? Does the fallback only work at the file level?

[kevinhwang91]

Does the fallback only work at the file level?

All providers work at the file level. If you want them to work together, you must write an external provider for provider_selector, doc/example may help you understand it.

[nwaywood]

Ah gotcha! Thanks for the help, sorry for my misunderstanding!