A Fast and Minimalism Style Completion Plugin for vim/nvim.

There are many excellent vim auto-completion plugins such as nvim-cmp, vim-lsp, YouCompleteMe and coc.nvim etc. However I still want a simpler plugin without any redundant configurations. And it's a good idea to incorporate an AI coding assistant as well.

Vim-easycomplete is a fast and minimalism style completion plugin for vim/nvim. It aims to be available out of the box on linux and mac. It is implemented in pure VimScript and is extremely simple to configure without installing Node and a bunch of Node modules.

It contains these features:

• AI coding assistant via tabnine. (Highly Recommend!)
• Buffer Keywords/Directory support
• LSP(language-server-protocol) support. Easy to install LSP Server with one command
• Written in pure vim script for vim8 and neovim
• Snippet support
• Fast performance

Easycomplete requires Vim 8.2 or higher version with MacOS/Linux/FreeBSD. For neovim users, 0.6.0 or higher is required.

Vimscript config with vim-plug:

Plug 'jayli/vim-easycomplete'
Plug 'SirVer/ultisnips'

Run :PlugInstall.

Lua config with Packer.nvim:

use { 'jayli/vim-easycomplete', requires = {'SirVer/ultisnips'}}

Run :PackerInstall

Full configuration example.

All commands:

The plugin is out of box and config nothing. (If you want full features, please refer to my full configuration). Use Tab to trigger the completion suggestions and select matched items. By default use Ctrl-] for definition jumping, Ctrl-t for jumping back (Same as tags jumping).

Lua configuration:

-- Highlight the symbol when holding the cursor if you need it
vim.g.easycomplete_cursor_word_hl = 1
-- Using nerdfont is highly recommended
vim.g.easycomplete_nerd_font = 1

-- GoTo code navigation
vim.keymap.set('n', 'gr', ':EasyCompleteReference<CR>')
vim.keymap.set('n', 'gd', ':EasyCompleteGotoDefinition<CR>')
vim.keymap.set('n', 'rn', ':EasyCompleteRename<CR>')
vim.keymap.set('n', 'gb', ':BackToOriginalBuffer<CR>')

Vimscript configuration:

" Highlight the symbol when holding the cursor
let g:easycomplete_cursor_word_hl = 1
" Using nerdfont is highly recommended
let g:easycomplete_nerd_font = 1

" GoTo code navigation
noremap gr :EasyCompleteReference<CR>
noremap gd :EasyCompleteGotoDefinition<CR>
noremap rn :EasyCompleteRename<CR>
noremap gb :BackToOriginalBuffer<CR>

set updatetime=300 (in lua vim.opt.updatetime = 300) is highly recommended.

Global configurations:

Typing :h easycomplete for help.

There are tow ways to install lsp server.

1. For vim/nvim: via integrated installer by :InstallLspServer.
2. For nvim only: via nvim-lsp-installer by :LspInstall

Plug 'williamboman/nvim-lsp-installer'

LSP Server will all be installed in ~/.config/vim-easycomplete/servers.

You can give a specified plugin name for InstallLspServer command. Both of the following useage are avilable:

• :InstallLspServer
• :InstallLspServer lua

All supported languages:

More info about semantic completion for each supported language:

• JavaScript & TypeScript: tsserver required.
• Python: There are 2 avilable python-language-server branches:
  • pyls support python 3.5 ~ 3.10 (pyls breaks autocomplete on Python 3.11), pip3 install python-language-server
  • pylsp work well with python 3.11, pip3 install python-lsp-server, (Recommend)
• Go: gopls required. (go get golang.org/x/tools/gopls)
• Vim Script: vimls required.
• C++/C/OC：Clangd required.
• CSS: cssls required. (css-languageserver)，Css-languageserver dose not support CompletionProvider by default as it requires Snippets，You must install it manually.
• JSON: json-languageserver required.
• PHP: intelephense
• Dart: dartls
• HTML: html required. html-languageserver dose not support CompletionProvider by default. You must install Snippets manually.
• Shell: bashls required.
• Java: jdtls, java 11 and upper version required.
• Cmake: cmake required.
• Kotlin: kotlin language server required.
• Rust: rust-analyzer required.
• Lua: sumneko lua required. Local configuration file path is ~/.config/vim-easycomplete/servers/lua/config.json. Get more information here.
• Xml: lemminx required.
• Groovy: groovyls required.
• Yaml: yamlls required.
• Ruby: solargraph required.
• Nim: nimlsp required. packages.json downloading is very slow, You'd better intall minlsp manually via choosenim follow this guide.
• Deno: denols required. Use :DenoCache command for deno cache current ts/js file.
• C# : omnisharp required.
• R: r-languageserver required.
• TabNine: TabNine

Add filetypes whitelist for specified language plugin:

let g:easycomplete_filetypes = {
      \   "sh": {
      \     "whitelist": ["shell"]
      \   },
      \   "r": {
      \     "whitelist": ["rmd", "rmarkdown"]
      \   },
      \ }

Vim-EasyComplete does not support snippets by default. If you want snippet integration, you will first have to install ultisnips. UltiSnips is compatible with Vim-EasyComplete out of the box. UltiSnips required python3 installed.

Solution of "E319: No python3 provider found" Error in neovim 0.4.4 with ultisnips

Install TabNine: :InstallLspServer tabnine. Then restart your vim/nvim.

Set let g:easycomplete_tabnine_enable = 0 to disable TabNine. You can config TabNine by g:easycomplete_tabnine_config witch contains two properties:

• line_limit: The number of lines before and after the cursor to send to TabNine. If the option is smaller, the performance may be improved. (default: 1000)
• max_num_result: Max results from TabNine. (default: 3)

let g:easycomplete_tabnine_config = {
    \ 'line_limit': 1000,
    \ 'max_num_result' : 3,
    \ }

TabNine works well without APIKey. If you have a Tabnine's Pro API key or purchased a subscription license. To configure, you'll need to use the TabNine' magic string. Type Tabnine::config in insert mode to open the configuration panel.

Disable TabNine inline suggestion: let g:easycomplete_tabnine_suggestion = 0.

Set g:easycomplete_nerd_font = 1 to enable default nerdfonts configuration.

If you want to customize the kind icon, you can modify the configuration with https://nerdfonts.com installed. Examples.

You can add custom Pmenu styles by defining these highlight groups:

• EasyFuzzyMatch: highlight fuzzy matching character. It links to "Constant" by default if it's not defined.
• EasyPmenu: Pmenu style. It links to "Pmenu" by default.
• EasyPmenuKind: PmenuKind style. It links to "PmenuKind" by default.
• EasyPmenuExtra: PmenuExtra style. It links to "PmenuExtra" by default.
• EasyFunction: Function kind icon style. links to "Conditional" by default.
• EasySnippet: Snippet kind icon style. links to "Number" by default.
• EasyTabNine: TabNine kind icon style. links to "Character" by default.
• EasySnippets: TabNine snippets suggestion style. links to "LineNr" by default

More examples here: full config example

My custom config:my-custom-config

→ add custom completion plugin

[WIP] If you have bug reports or feature suggestions, please use the issue tracker. In the meantime feel free to read some of my thoughts at https://zhuanlan.zhihu.com/p/366496399, https://zhuanlan.zhihu.com/p/425555993, https://medium.com/@lijing00333/vim-easycomplete

TabNine snippets inline suggestion

Update Deno Cache via :DenoCache

Directory selecting:

Handle backsapce typing

Snip Support

Diagnostics jumping

Signature

TabNine supporting:

MIT