regex filter for lsp_references

[serranomorante]

Thank you for this

I just tried the regex_filter but Lua patterns are just extremely extremely limiting 😢
Vim search patterns are a better matching tool (although I don't know about performance)
I also tried with fzf_opts = { ['--query'] = ...} on lsp_references but that will use a fuzzy matcher, not regex 😮‍💨 .

I want to generate a list of regex "matchers" for several languages, that will exclude the import statements from the lsp_references result.

Something like:

local exclude_imports = {
  python = {"regex_pattern_1", ...}, -- could match anything but "from main import main" or "import main"
  javascript = {"regex_pattern_1", ...}, -- could match anything but "import React from 'react'" or "const react = require('react')"
  etc, etc
}

I don't think fzf-lua should worry about implementing a new config option just for this (something like include_imports...)

Are there any other available options to use regex on the lsp_references?

Maybe any of the advance entries could help on this? I'm willing to dig further and maybe create my own lsp_references just for my config.

Thanks!

[ibhagwan]

I just tried the regex_filter but Lua patterns are just extremely extremely limiting
I don't think fzf-lua should worry about implementing a new config option just for this

We can have regex_filter accept a function so you can filter the items as you please, the only minor issue would be the ability to display the custom filter in the header (can be displayed as <function>).

[serranomorante]

It make sense to me! As long as this is not a maintainability burden for you. Thank you so much ❤️

[ibhagwan]

@serranomorante, see a9e5755

Added some improvements including the below:

:FzfLua lsp_references regex_filter={"import.*from.*",exclude=true}
-- equal to:
:lua require("fzf-lua").lsp_finder({ regex_filter = {"import.*from.*", exclude=true} })

You can also define regex_filter as a function, when it returns false the item will be filtered out:

-- Explore `ctx` and `item` with `vim.print` so you can decide on your filtering logic
-- `ctx` contains buffer number and so you can determine `filetype`, etc
:lua require("fzf-lua").lsp_finder({regex_filter=function(e,ctx) vim.print(ctx); return true end})

When a function is used the header will display <function> , can be disabled with header=false:

[serranomorante]

This is so beautiful. Tested it, works like charm! Thank you so much.

Now I can just do something like this:

M.javascript_regex_filter = function(item)
  if item.text:match("^import%s.*from.*") then return false end
  return true
end
M.python_regex_filter = function(item)
  if item.text:match("^from%s.*import.*") then return false end
  if item.text:match("^import%s.*") then return false end
  return true
end

Very convenient ❤️ ❤️ ❤️

[ibhagwan]

Very nice indeed!