neovim插件telescope

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今天发现一些网友配置了模糊查找插件telescope.nvim, 尝试了一下，发现相当好用。于是决定将其README.md文件搬于此处，以备查询，今天我的Neovim又获得了一项功能。开启查找使用\ff, 退出使用Esc 或 <Ctl+c>, 具体参考文章：telescope.nvim: 查找、筛选、预览、拾取。所有的lua，所有的时间。 和 你们的vim配置都换成lua了吗？

telescope.nvim

Gitter LuaRocks

Gaze deeply into unknown regions using the power of the moon.

What Is Telescope?

telescope.nvim is a highly extendable fuzzy finder over lists. Built on the latest awesome features from neovim core. Telescope is centered around modularity, allowing for easy customization.

Community driven builtin pickers, sorters and previewers.

Preview For more showcases of Telescope, please visit the Showcase section in the Telescope Wiki

Telescope Table of Contents

Getting Started

This section should guide you to run your first builtin pickers.

Neovim (v0.9.0) or the latest neovim nightly commit is required for telescope.nvim to work. The neovim version also needs to be compiled with LuaJIT, we currently do not support Lua5.1 because of some ongoing issues.

Required dependencies

Suggested dependencies

  • BurntSushi/ripgrep is required for live_grep and grep_string and is the first priority for find_files.

We also suggest you install one native telescope sorter to significantly improve sorting performance. Take a look at either telescope-fzf-native.nvim or telescope-fzy-native.nvim. For more information and a performance benchmark take a look at the Extensions wiki.

Optional dependencies

Installation

It is suggested to either use the latest release tag or our release branch (which will get consistent updates) 0.1.x.

It is not suggested to run latest master.

Using vim-plug

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Plug 'nvim-lua/plenary.nvim'
Plug 'nvim-telescope/telescope.nvim', { 'tag': '0.1.4' }
" or                                , { 'branch': '0.1.x' }

Using dein

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call dein#add('nvim-lua/plenary.nvim')
call dein#add('nvim-telescope/telescope.nvim', { 'rev': '0.1.4' })
" or                                         , { 'rev': '0.1.x' })

Using packer.nvim

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use {
  'nvim-telescope/telescope.nvim', tag = '0.1.4',
-- or                            , branch = '0.1.x',
  requires = { {'nvim-lua/plenary.nvim'} }
}

Using lazy.nvim

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-- init.lua:
    {
    'nvim-telescope/telescope.nvim', tag = '0.1.4',
-- or                              , branch = '0.1.x',
      dependencies = { 'nvim-lua/plenary.nvim' }
    }

-- plugins/telescope.lua:
return {
    'nvim-telescope/telescope.nvim', tag = '0.1.4',
-- or                              , branch = '0.1.x',
      dependencies = { 'nvim-lua/plenary.nvim' }
    }

checkhealth

Make sure you call :checkhealth telescope after installing telescope to ensure everything is set up correctly.

After this setup you can continue reading here or switch to :help telescope to get an understanding of how to use Telescope and how to configure it.

Usage

Try the command :Telescope find_files<cr> to see if telescope.nvim is installed correctly.

Using VimL:

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" Find files using Telescope command-line sugar.
nnoremap <leader>ff <cmd>Telescope find_files<cr>
nnoremap <leader>fg <cmd>Telescope live_grep<cr>
nnoremap <leader>fb <cmd>Telescope buffers<cr>
nnoremap <leader>fh <cmd>Telescope help_tags<cr>

" Using Lua functions
nnoremap <leader>ff <cmd>lua require('telescope.builtin').find_files()<cr>
nnoremap <leader>fg <cmd>lua require('telescope.builtin').live_grep()<cr>
nnoremap <leader>fb <cmd>lua require('telescope.builtin').buffers()<cr>
nnoremap <leader>fh <cmd>lua require('telescope.builtin').help_tags()<cr>

Using Lua:

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local builtin = require('telescope.builtin')
vim.keymap.set('n', '<leader>ff', builtin.find_files, {})
vim.keymap.set('n', '<leader>fg', builtin.live_grep, {})
vim.keymap.set('n', '<leader>fb', builtin.buffers, {})
vim.keymap.set('n', '<leader>fh', builtin.help_tags, {})

See builtin pickers for a list of all builtin functions.

Customization

This section should help you explore available options to configure and customize your telescope.nvim.

Unlike most vim plugins, telescope.nvim can be customized by either applying customizations globally, or individually per picker.

  • Global Customization affecting all pickers can be done through the main setup() method (see defaults below)
  • Individual Customization affecting a single picker by passing opts to builtin pickers (e.g. builtin.find_files(opts)) see Configuration recipes wiki page for ideas.

Telescope setup structure

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require('telescope').setup{
  defaults = {
    -- Default configuration for telescope goes here:
    -- config_key = value,
    mappings = {
      i = {
        -- map actions.which_key to <C-h> (default: <C-/>)
        -- actions.which_key shows the mappings for your picker,
        -- e.g. git_{create, delete, ...}_branch for the git_branches picker
        ["<C-h>"] = "which_key"
      }
    }
  },
  pickers = {
    -- Default configuration for builtin pickers goes here:
    -- picker_name = {
    --   picker_config_key = value,
    --   ...
    -- }
    -- Now the picker_config_key will be applied every time you call this
    -- builtin picker
  },
  extensions = {
    -- Your extension configuration goes here:
    -- extension_name = {
    --   extension_config_key = value,
    -- }
    -- please take a look at the readme of the extension you want to configure
  }
}

To look at what default configuration options exist please read: :help telescope.setup(). For picker specific opts please read: :help telescope.builtin.

To embed the above code snippet in a .vim file (for example in after/plugin/telescope.nvim.vim), wrap it in lua << EOF code-snippet EOF:

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lua << EOF
require('telescope').setup{
  -- ...
}
EOF

Default Mappings

Mappings are fully customizable. Many familiar mapping patterns are set up as defaults.

Mappings Action
<C-n>/<Down> Next item
<C-p>/<Up> Previous item
j/k Next/previous (in normal mode)
H/M/L Select High/Middle/Low (in normal mode)
gg/G Select the first/last item (in normal mode)
<CR> Confirm selection
<C-x> Go to file selection as a split
<C-v> Go to file selection as a vsplit
<C-t> Go to a file in a new tab
<C-u> Scroll up in preview window
<C-d> Scroll down in preview window
<C-f> Scroll left in preview window
<C-k> Scroll right in preview window
<M-f> Scroll left in results window
<M-k> Scroll right in results window
<C-/> Show mappings for picker actions (insert mode)
? Show mappings for picker actions (normal mode)
<C-c> Close telescope (insert mode)
<Esc> Close telescope (in normal mode)
<Tab> Toggle selection and move to next selection
<S-Tab> Toggle selection and move to prev selection
<C-q> Send all items not filtered to quickfixlist (qflist)
<M-q> Send all selected items to qflist

To see the full list of mappings, check out lua/telescope/mappings.lua and the default_mappings table.

Tip: you can use <C-/> and ? in insert and normal mode, respectively, to show the actions mapped to your picker.

Much like builtin pickers, there are a number of actions you can pick from to remap your telescope buffer mappings, or create a new custom action:

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-- Built-in actions
local transform_mod = require('telescope.actions.mt').transform_mod

-- or create your custom action
local my_cool_custom_action = transform_mod({
  x = function(prompt_bufnr)
    print("This function ran after another action. Prompt_bufnr: " .. prompt_bufnr)
    -- Enter your function logic here. You can take inspiration from lua/telescope/actions.lua
  end,
})

To remap telescope mappings, please read :help telescope.defaults.mappings. To do picker specific mappings, its suggested to do this with the pickers table in telescope.setup. Each picker accepts a mappings table like its explained in :help telescope.defaults.mappings.

Pickers

Built-in functions. Ready to be bound to any key you like.

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:lua require'telescope.builtin'.planets{}

:nnoremap <Leader>pp :lua require'telescope.builtin'.planets{}

File Pickers

Functions Description
builtin.find_files Lists files in your current working directory, respects .gitignore
builtin.git_files Fuzzy search through the output of git ls-files command, respects .gitignore
builtin.grep_string Searches for the string under your cursor or selection in your current working directory
builtin.live_grep Search for a string in your current working directory and get results live as you type, respects .gitignore. (Requires ripgrep)

Vim Pickers

Functions Description
builtin.buffers Lists open buffers in current neovim instance
builtin.oldfiles Lists previously open files
builtin.commands Lists available plugin/user commands and runs them on <cr>
builtin.tags Lists tags in current directory with tag location file preview (users are required to run ctags -R to generate tags or update when introducing new changes)
builtin.command_history Lists commands that were executed recently, and reruns them on <cr>
builtin.search_history Lists searches that were executed recently, and reruns them on <cr>
builtin.help_tags Lists available help tags and opens a new window with the relevant help info on <cr>
builtin.man_pages Lists manpage entries, opens them in a help window on <cr>
builtin.marks Lists vim marks and their value
builtin.colorscheme Lists available colorschemes and applies them on <cr>
builtin.quickfix Lists items in the quickfix list
builtin.quickfixhistory Lists all quickfix lists in your history and open them with builtin.quickfix or quickfix window
builtin.loclist Lists items from the current window's location list
builtin.jumplist Lists Jump List entries
builtin.vim_options Lists vim options, allows you to edit the current value on <cr>
builtin.registers Lists vim registers, pastes the contents of the register on <cr>
builtin.autocommands Lists vim autocommands and goes to their declaration on <cr>
builtin.spell_suggest Lists spelling suggestions for the current word under the cursor, replaces word with selected suggestion on <cr>
builtin.keymaps Lists normal mode keymappings
builtin.filetypes Lists all available filetypes
builtin.highlights Lists all available highlights
builtin.current_buffer_fuzzy_find Live fuzzy search inside of the currently open buffer
builtin.current_buffer_tags Lists all of the tags for the currently open buffer, with a preview
builtin.resume Lists the results incl. multi-selections of the previous picker
builtin.pickers Lists the previous pickers incl. multi-selections (see :h telescope.defaults.cache_picker)

Neovim LSP Pickers

Functions Description
builtin.lsp_references Lists LSP references for word under the cursor
builtin.lsp_incoming_calls Lists LSP incoming calls for word under the cursor
builtin.lsp_outgoing_calls Lists LSP outgoing calls for word under the cursor
builtin.lsp_document_symbols Lists LSP document symbols in the current buffer
builtin.lsp_workspace_symbols Lists LSP document symbols in the current workspace
builtin.lsp_dynamic_workspace_symbols Dynamically Lists LSP for all workspace symbols
builtin.diagnostics Lists Diagnostics for all open buffers or a specific buffer. Use option bufnr=0 for current buffer.
builtin.lsp_implementations Goto the implementation of the word under the cursor if there's only one, otherwise show all options in Telescope
builtin.lsp_definitions Goto the definition of the word under the cursor, if there's only one, otherwise show all options in Telescope
builtin.lsp_type_definitions Goto the definition of the type of the word under the cursor, if there's only one, otherwise show all options in Telescope

Git Pickers

Functions Description
builtin.git_commits Lists git commits with diff preview, checkout action <cr>, reset mixed <C-r>m, reset soft <C-r>s and reset hard <C-r>h
builtin.git_bcommits Lists buffer's git commits with diff preview and checks them out on <cr>
builtin.git_bcommits_range Lists buffer's git commits in a range of lines. Use options from and to to specify the range. In visual mode, lists commits for the selected lines
builtin.git_branches Lists all branches with log preview, checkout action <cr>, track action <C-t>, rebase action<C-r>, create action <C-a>, switch action <C-s>, delete action <C-d> and merge action <C-y>
builtin.git_status Lists current changes per file with diff preview and add action. (Multi-selection still WIP)
builtin.git_stash Lists stash items in current repository with ability to apply them on <cr>

Treesitter Picker

Functions Description
builtin.treesitter Lists Function names, variables, from Treesitter!

Lists Picker

Functions Description
builtin.planets Use the telescope...
builtin.builtin Lists Built-in pickers and run them on <cr>.
builtin.reloader Lists Lua modules and reload them on <cr>.
builtin.symbols Lists symbols inside a file data/telescope-sources/*.json found in your rtp. More info and symbol sources can be found here

Previewers

Previewers Description
previewers.vim_buffer_cat.new Default previewer for files. Uses vim buffers
previewers.vim_buffer_vimgrep.new Default previewer for grep and similar. Uses vim buffers
previewers.vim_buffer_qflist.new Default previewer for qflist. Uses vim buffers
previewers.cat.new Terminal previewer for files. Uses cat/bat
previewers.vimgrep.new Terminal previewer for grep and similar. Uses cat/bat
previewers.qflist.new Terminal previewer for qflist. Uses cat/bat

The default previewers are from now on vim_buffer_ previewers. They use vim buffers for displaying files and use tree-sitter or regex for file highlighting.

These previewers are using vim.filetype to guess the filetype for the selected file. The guessing is done by inspecting the filename, the head of the file(shebang) and the tail of the file (modeline). If you have trouble with filetype detection you should read :help vim.filetype.

We need to do it manually because we can't determine the filetype in the traditional way: We don't do bufload and instead read the file asynchronously with vim.loop.fs_ and attach only a highlighter; otherwise the speed of the previewer would slow down considerably.

If you want to configure the vim_buffer_ previewer (e.g. you want the line to wrap), do this:

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vim.api.nvim_create_autocmd("User", {
  pattern = "TelescopePreviewerLoaded",
  callback = function(args)
    if args.data.filetype ~= "help" then
      vim.wo.number = true
    elseif args.data.bufname:match("*.csv") then
      vim.wo.wrap = false
    end
  end,
})

A data field is passed to the callback, which contains the filetype and the buffer name.

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{
  title: string, # preview window title
  filetype: string,
  bufname: string,
}

Sorters

Sorters Description
sorters.get_fuzzy_file Telescope's default sorter for files
sorters.get_generic_fuzzy_sorter Telescope's default sorter for everything else
sorters.get_levenshtein_sorter Using Levenshtein distance algorithm (don't use :D)
sorters.get_fzy_sorter Using fzy algorithm
sorters.fuzzy_with_index_bias Used to list stuff with consideration to when the item is added

A Sorter is called by the Picker on each item returned by the Finder. It returns a number, which is equivalent to the "distance" between the current prompt and the entry returned by a finder.

Layout (display)

Layout can be configured by choosing a specific layout_strategy and specifying a particular layout_config for that strategy. For more details on available strategies and configuration options, see :help telescope.layout.

Some options for configuring sizes in layouts are "resolvable". This means that they can take different forms, and will be interpreted differently according to which form they take. For example, if we wanted to set the width of a picker using the vertical layout strategy to 50% of the screen width, we would specify that width as 0.5, but if we wanted to specify the width to be exactly 80 characters wide, we would specify it as 80. For more details on resolving sizes, see :help telescope.resolve.

As an example, if we wanted to specify the layout strategy and width, but only for this instance, we could do something like:

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:lua require('telescope.builtin').find_files({layout_strategy='vertical',layout_config={width=0.5}})

If we wanted to change the width for every time we use the vertical layout strategy, we could add the following to our setup() call:

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require('telescope').setup({
  defaults = {
    layout_config = {
      vertical = { width = 0.5 }
      -- other layout configuration here
    },
    -- other defaults configuration here
  },
  -- other configuration values here
})

Themes

Common groups of settings can be set up to allow for themes. We have some built in themes but are looking for more cool options.

dropdown
Themes Description
themes.get_dropdown A list like centered list. dropdown
themes.get_cursor A cursor relative list.
themes.get_ivy Bottom panel overlay. Ivy #771

To use a theme, simply append it to a builtin function:

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nnoremap <Leader>f :lua require'telescope.builtin'.find_files(require('telescope.themes').get_dropdown({}))<cr>
" Change an option
nnoremap <Leader>f :lua require'telescope.builtin'.find_files(require('telescope.themes').get_dropdown({ winblend = 10 }))<cr>

Or use with a command:

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Telescope find_files theme=dropdown

Or you can configure it in the pickers table in telescope.setup:

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require('telescope').setup{
  defaults = {
    -- ...
  },
  pickers = {
    find_files = {
      theme = "dropdown",
    }
  },
  extensions = {
    -- ...
  }
}

Themes should work with every telescope.builtin function. If you wish to make a theme, check out lua/telescope/themes.lua.

Vim Commands

All telescope.nvim functions are wrapped in vim commands for easy access, tab completions and setting options.

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" Show all builtin pickers
:Telescope

" Tab completion
:Telescope |<tab>
:Telescope find_files

" Setting options
:Telescope find_files prompt_prefix=🔍

" If the option accepts a Lua table as its value, you can use, to connect each
" command string, e.g.: find_command, vimgrep_arguments are both options that
" accept a Lua table as a value. So, you can configure them on the command line
"like so:
:Telescope find_files find_command=rg,--ignore,--hidden,--files prompt_prefix=🔍

for more information and how to realize more complex commands please read :help telescope.command.

Autocmds

Telescope user autocmds:

Event Description
User TelescopeFindPre Do it before Telescope creates all the floating windows
User TelescopePreviewerLoaded Do it after Telescope previewer window is created
User TelescopeResumePost Do it after Telescope resume action is fully completed

Extensions

Telescope provides the capabilities to create & register extensions, which improves telescope in a variety of ways.

Some extensions provide integration with external tools, outside of the scope of builtins. Others provide performance enhancements by using compiled C and interfacing directly with Lua over LuaJIT's FFI library.

A list of community extensions can be found in the Extensions wiki. Always read the README of the extension you want to install, but here is a general overview of how most extensions work.

Loading extensions

To load an extension, use the load_extension function as shown in the example below:

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-- This will load fzy_native and have it override the default file sorter
require('telescope').load_extension('fzy_native')

You may skip explicitly loading extensions (they will then be lazy-loaded), but tab completions will not be available right away.

Accessing pickers from extensions

Pickers from extensions are added to the :Telescope command under their respective name. For example:

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" Run the `configurations` picker from nvim-dap
:Telescope dap configurations

They can also be called directly from Lua:

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-- Run the `configurations` picker from nvim-dap
require('telescope').extensions.dap.configurations()

API

For writing your own picker and for information about the API please read the Developers Documentation.

Media

Contributing

All contributions are welcome! Just open a pull request. Please read CONTRIBUTING.md