How to filter by content of files within selected files or list of files showing

[wjdwndud0114]

Hi, I have custom rg/fd functions like this (one example):

  vim.keymap.set('n', '<leader><C-p>', function()
    fzf.fzf_exec('fd -H --type f --strip-cwd-prefix | ~/.dotfiles/file-web-devicon', {
      actions = fzf.defaults.actions.files,
      cwd = vim.api.nvim_eval("expand('%:p:~:.:h')"),
      prompt = vim.api.nvim_eval("expand('%:p:~:.:h')") .. '> ',
      fzf_opts = {
        ['--multi'] = 999,
        ['--nth'] = 2,
        ['--delimiter'] = fzf.utils.nbsp
      },
      previewer = 'builtin',
    })
  end, { noremap = true })

The purpose being to replace the icon generating logic with something faster which is essential with enormous monorepos.

This lets me find files within the current parent directory.

However, I often need to do an additional search within the files that were searched. Is there a way to "rg" for content insides these files? Looking for suggestions for a solution.

I'm thinking I would have to implement a kepmap that would get the list of current files or selections from fzf-lua and then open a live grep window filtered with the given files?

I know there is a <C-g> with the builtin live_grep but I can't use that due to it being too slow (icons slow without the custom icon calculation). If it's possible to change my setup to use this as well as custom icons, please let me know!

Thank you!

[ibhagwan]

I'm thinking I would have to implement a kepmap that would get the list of current files or selections from fzf-lua and then open a live grep window filtered with the given files?

Correct, you’d need to construct a special rg command from the list of files and feed that into live_grep({ cmd = … }).

I know there is a with the builtin live_grep but I can't use that due to it being too slow (icons slow without the custom icon calculation). If it's possible to change my setup to use this as well as custom icons, please let me know!

Not sure if I understand this question, you can always use file_icons=false,git_icons=false if you feel the overhead is too big.

[ibhagwan]

I missed the part where your icon generating logic is actually in the shell:

fd -H --type f --strip-cwd-prefix | ~/.dotfiles/file-web-devicon

I know there is a with the builtin live_grep but I can't use that due to it being too slow (icons slow without the custom icon calculation). If it's possible to change my setup to use this as well as custom icons, please let me know!

Why don’t you call fzf_live with a custom rg command piped into your iconifier in the same way you called fzf_exec?

Assuming your iconifier can handle file:line:col:text output from rg

fzf.fzf_live(
    "rg --line-number --column --color=always -- <query> | ~/.dotfiles/file-web-devicon", {
      actions = fzf.defaults.actions.files,
      cwd = vim.api.nvim_eval("expand('%:p:~:.:h')"),
      prompt = vim.api.nvim_eval("expand('%:p:~:.:h')") .. '> ',
      fzf_opts = {
        ['--multi'] = 999,
        ['--nth'] = 2,
        ['--delimiter'] = fzf.utils.nbsp
      },
      previewer = 'builtin',
  })

[wjdwndud0114]

Or maybe I should just disable icons and use live_grep, git_files 🤔

[wjdwndud0114]

Although, it would be very useful to be able to rg within files showing such as in oldfiles, gitfiles, etc...

[ibhagwan]

I do have that already for rg but that doesn't come with <C-g> functionality

It is possible but that would require creating your own version of the function switching between your custom fzf_exec / fzf_live, you can take a look at the action to see how it’s done.

SAlternatively it’s possible to reuse grep|live_grep, use the opts.filter field as your icon generator and nullify the make entry processor to avoid adding the icons twice with __mt_transform = 'return function(x) return x end', you can explore the code for tags to see how grep is reused:

fzf-lua/lua/fzf-lua/providers/tags.lua

Lines 152 to 175 in 9c953df

	if opts.lgrep then
	-- we need this for 'actions.grep_lgrep'
	opts.__ACT_TO = opts.__ACT_TO or M.grep
	-- live_grep requested by caller ('tags_live_grep')
	local cmd, filter = get_tags_cmd({ search = "dummy" })
	if not cmd then return end -- cmd only used for this test
	opts.filter = (opts.filter == nil) and filter or opts.filter
	-- rg globs are meaningless here since we are searching a single file
	opts.rg_glob = false
	-- tags has it's own formatter
	opts.formatter, opts._fmt = false, { _to = false, to = false, from = false }
	opts.filename = opts._ctags_file
	if opts.multiprocess then
	return require "fzf-lua.providers.grep".live_grep_mt(opts)
	else
	-- 'live_grep_st' uses different signature 'fn_transform'
	opts.fn_transform = function(x)
	return make_entry.tag(x, opts)
	end
	return require "fzf-lua.providers.grep".live_grep_st(opts)
	end
	else
	-- we need this for 'actions.grep_lgrep'
	opts.__ACT_TO = opts.__ACT_TO or M.live_grep

Or maybe I should just disable icons and use live_grep, git_files

Certainly an option :)

How much faster is your script anyways (vs the lua code)?

Although, it would be very useful to be able to rg within files showing such as in oldfiles, gitfiles, etc...

These seems like a different issue/feature unrelated to the “faster icons”, as I mentioned, this would require crafting your own rg command from the selected files (searching only in these) and feeding that command as cmd.

[wjdwndud0114]

Thank you, will explore and see what I can do when I have time.

How much faster is your script anyways (vs the lua code)?

Hmm just tested it and around ~2seconds faster to load although I remember the difference being much greater. Maybe something changed since then :) This is for 500k+ files. (this is the binary)

[ibhagwan]

2s shouldn't make such a difference for such a large project, is it possible the difference was due to git_icons=true (which requires running git status for the git indicators)?

I've since added a warning to alert users if there's a git status which is taking more than 3s:

fzf-lua/lua/fzf-lua/make_entry.lua

Lines 79 to 80 in 7109a18

	local exec_str = string.format([[require"fzf-lua".utils.warn(]] ..
	[["`git status` took %d seconds, consider using `:FzfLua files git_icons=false` in this repository.")]]

https://github.com/MaartenStaa/file-web-devicons

Nice project! in the past I looked at https://github.com/coreyja/devicon-lookup but the benefit wasn't worth the hassle (having to supply a precompiled binary with fzf-lua) but you might find it interesting as well as the writeup.

[ibhagwan]

@wjdwndud0114, FYI, ty for letting me know this existed, might be useful one day :-)

MaartenStaa/file-web-devicons#4