lazy loading

[mathjiajia]

Describe the bug
When using lazy loading (by default),
aerial will not fallback to lsp if treesitter is not support.

System information

• OS: [mac]
• Neovim version: NVIM v0.9.0-dev-169+gfef8ff908
• AerialInfo: [
  Filetype: tex
  Configured backends:
  treesitter (not supported) [No query file for 'latex']
  lsp (not supported) [LSP client available, but not attached]
  markdown (not supported) [Filetype is not markdown]
  man (not supported) [Filetype is not man]
  Show symbols: Class, Constant, Constructor, Enum, EnumMember, Function, Interface, Method, Module, Object, Struct, Variable]
• Aerial config:

require('aerial').setup({
	filter_kind = {
		'Class', 'Constant', 'Constructor', 'Enum',
		'EnumMember', 'Function', 'Interface', 'Method',
		'Module', 'Object', 'Struct', 'Variable',
	},
	-- lazy_load = false,
	show_guides = true,
})

To Reproduce
Steps to reproduce the behavior:

1. Open a file that haven't been supported by treesitter, say tex
2. Use AerialToggle

If possible, provide a minimal file that will trigger the issue:

minimal code here

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Maybe you can call create_autocmds() in the lazy mode??

[rebelot]

To me, aerial does not attach to lsp if lazy_mode is true, unless I reload the buffer.

this is my workaround

    use({
        "stevearc/aerial.nvim",
        event = "BufRead",
        cmd = { "AerialToggle", "AerialInfo" },
        keys = { { "n", "<leader>at" } },
        config = function()
            require("aerial").setup({
                lazy_load = false,
                ...
            })
        end
    })

[stevearc]

This was because we were relying too much on the LspAttach autocmd, and that isn't set up when aerial is in lazy (pending loading) mode. I've refactored it to not lean so much on the autocmd, and it should be fixed now.

[mathjiajia]

It resolves this problem.
Thank you.