• About
• Screenshots
• Installation
• Usage
  • Setup
  • Commands
  • Configuration
• Available LSPs
• Custom servers
• Logo
• Default configuration

About

Neovim plugin that allows you to manage LSP servers (servers are installed inside :echo stdpath("data") by default). It works in tandem with lspconfig¹ by registering a hook that enhances the PATH environment variable, allowing neovim's LSP client to locate the installed server executable.²

On top of just providing commands for installing & uninstalling LSP servers, it:

• provides a graphical UI
• provides the ability to check for, and upgrade to, new server versions through a single interface
• supports installing custom versions of LSP servers (for example :LspInstall rust_analyzer@nightly)
• relaxes the minimum requirements by attempting multiple different utilities (for example, only one of wget, curl, or Invoke-WebRequest is required for HTTP requests)
• hosts a suite of system tests for all supported servers
• has full support for Windows

^{1 - while lspconfig is the main target, this plugin may also be used for other use cases
2 - some servers don't provide an executable, in which case the full command to spawn the server is provided instead}

Screenshots

Installation

Requires neovim >= 0.7.0 and nvim-lspconfig. The full requirements to install all servers are:

• For Unix systems: git(1), curl(1) or wget(1), unzip(1), tar(1), gzip(1)
• For Windows systems: powershell, git, tar, and 7zip or peazip or archiver or winzip or WinRAR
• Node.js (LTS) & npm
• Python3 & pip3
• go >= 1.17
• JDK
• Ruby & gem
• PHP & Composer
• dotnet
• pwsh
• Julia
• valac (and meson & ninja)
• rebar3
• cargo

Packer

use {
    "williamboman/nvim-lsp-installer",
    {
        "neovim/nvim-lspconfig",
        setup = function()
            require("nvim-lsp-installer").setup {}
        end
    }
}

vim-plug

Plug "williamboman/nvim-lsp-installer"
Plug "neovim/nvim-lspconfig"

Usage

Setup

In order for nvim-lsp-installer to register the necessary hooks at the right moment, make sure you call the .setup() function before you set up any servers with lspconfig!

require("nvim-lsp-installer").setup {}

Important if you use packer.nvim! (click to expand)

Do not separate the nvim-lsp-installer setup from lspconfig, for example via the config hook. Make sure to colocate the nvim-lsp-installer setup with the lspconfig setup. This is because load order of plugins is not guaranteed, leading to nvim-lsp-installer's config function potentially executing after lspconfig's.

❌ Do not do this:

use {
    {
        "williamboman/nvim-lsp-installer",
        config = function()
            require("nvim-lsp-installer").setup {}
        end
    },
    {
        "neovim/nvim-lspconfig",
        config = function()
            local lspconfig = require("lspconfig")
            lspconfig.sumneko_lua.setup {}
        end
    },
}

✅ Instead, do this:

use {
    "williamboman/nvim-lsp-installer",
    {
        "neovim/nvim-lspconfig",
        config = function()
            require("nvim-lsp-installer").setup {}
            local lspconfig = require("lspconfig")
            lspconfig.sumneko_lua.setup {}
        end
    }
}

Refer to the Configuration section for information about which settings are available.

Commands

• :LspInstallInfo - opens a graphical overview of your language servers
• :LspInstall [--sync] [server] ... - installs/reinstalls language servers. Runs in a blocking fashion if the --sync argument is passed (only recommended for scripting purposes).
• :LspUninstall [--sync] <server> ... - uninstalls language servers. Runs in a blocking fashion if the --sync argument is passed (only recommended for scripting purposes).
• :LspUninstallAll [--no-confirm] - uninstalls all language servers
• :LspInstallLog - opens the log file in a new tab window
• :LspPrintInstalled - prints all installed language servers

Configuration

You may optionally configure certain behavior of nvim-lsp-installer when calling the .setup() function.

Refer to the default configuration for all available settings.

Example:

require("nvim-lsp-installer").setup({
    ensure_installed = { "rust_analyzer", "sumneko_lua" }, -- ensure these servers are always installed
    automatic_installation = true, -- automatically detect which servers to install (based on which servers are set up via lspconfig)
    ui = {
        icons = {
            server_installed = "✓",
            server_pending = "➜",
            server_uninstalled = "✗"
        }
    }
})

Available LSPs

Language	Server name
AWK	awk_ls
Angular	angularls
Ansible	ansiblels
Arduino (docs!!!)	arduino_language_server
Assembly (GAS/NASM, GO)	asm_lsp
AsyncAPI	spectral
Bash	bashls
Beancount	beancount
Bicep	bicep
C	ccls
C	clangd
C#	csharp_ls
C#	omnisharp
C++	ccls
C++	clangd
CMake	cmake
CSS	cssls
CSS	cssmodules_ls
Clarity	clarity_lsp
Clojure	clojure_lsp
CodeQL	codeqlls
Crystal	crystalline
Crystal	scry
Cucumber	cucumber_language_server
Dart	dartls
Deno	denols
Dhall	dhall_lsp_server
Diagnostic (general purpose server)	diagnosticls
Dlang	serve_d
Docker	dockerls
Dot	dotls
EFM (general purpose server)	efm
ESLint (docs)	eslint
Elixir	elixirls
Elm	elmls
Ember	ember
Emmet	emmet_ls
Erlang	erlangls
F#	fsautocomplete
Flux	flux_lsp
Foam (OpenFOAM)	foam_ls
Fortran	fortls
Go	golangci_lint_ls
Go	gopls
Grammarly	grammarly
GraphQL	graphql
Groovy	groovyls
HTML	html
Haskell	hls
Haxe	haxe_language_server
Hoon	hoon_ls
JSON	jsonls
Java	jdtls
JavaScript	quick_lint_js
JavaScript	tsserver
Jsonnet	jsonnet_ls
Julia	julials
Kotlin	kotlin_language_server
LaTeX	ltex
LaTeX	texlab
Lelwel	lelwel_ls
Lua	sumneko_lua
Markdown	prosemd_lsp
Markdown	remark_ls
Markdown	zeta_note
Markdown	zk
Metamath Zero	mm0_ls
Nickel	nickel_ls
Nim	nimls
OCaml	ocamlls
OCaml	ocamllsp
Objective C	ccls
OneScript, 1C:Enterprise	bsl_ls
OpenAPI	spectral
OpenCL	opencl_ls
PHP	intelephense
PHP	phpactor
PHP	psalm
Perl	perlnavigator
Powershell	powershell_es
Prisma	prismals
Puppet	puppet
PureScript	purescriptls
Python	jedi_language_server
Python	pyright
Python	sourcery
Python (docs)	pylsp
R	r_language_server
ReScript	rescriptls
Reason	reason_ls
Robot Framework	robotframework_ls
Rome	rome
Ruby	solargraph
Rust	rust_analyzer
SQL	sqlls
SQL	sqls
Salt	salt_ls
Shopify Theme Check	theme_check
Slint	slint_lsp
Solidity	solang
Solidity	solc
Solidity (VSCode)	solidity_ls
Sorbet	sorbet
Sphinx	esbonio
Stylelint	stylelint_lsp
Svelte	svelte
Swift	sourcekit
SystemVerilog	svls
SystemVerilog	verible
TOML	taplo
Tailwind CSS	tailwindcss
Terraform	terraformls
Terraform (docs)	tflint
TypeScript	tsserver
Vala	vala_ls
VimL	vimls
Vue	volar
Vue	vuels
XML	lemminx
YAML	yamlls
Zig	zls

Custom servers

You can create your own installers by using the same APIs nvim-lsp-installer itself uses. Refer to CUSTOM_SERVERS.md for more information.

Logo

Illustrations in the logo are derived from @Kaligule's "Robots" collection.

Default configuration

local DEFAULT_SETTINGS = {
    -- A list of servers to automatically install if they're not already installed. Example: { "rust_analyzer", "sumneko_lua" }
    ensure_installed = {},
    -- Whether servers that are set up (via lspconfig) should be automatically installed if they're not already installed.
    -- Can either be:
    --   - false: Servers are not automatically installed.
    --   - true: All servers set up via lspconfig are automatically installed.
    --   - { exclude: string[] }: All servers set up via lspconfig, except the ones provided in the list, are automatically installed.
    --       Example: automatic_installation = { exclude = { "rust_analyzer", "solargraph" } }
    automatic_installation = false,
    ui = {
        icons = {
            -- The list icon to use for installed servers.
            server_installed = "◍",
            -- The list icon to use for servers that are pending installation.
            server_pending = "◍",
            -- The list icon to use for servers that are not installed.
            server_uninstalled = "◍",
        },
        keymaps = {
            -- Keymap to expand a server in the UI
            toggle_server_expand = "<CR>",
            -- Keymap to install the server under the current cursor position
            install_server = "i",
            -- Keymap to reinstall/update the server under the current cursor position
            update_server = "u",
            -- Keymap to check for new version for the server under the current cursor position
            check_server_version = "c",
            -- Keymap to update all installed servers
            update_all_servers = "U",
            -- Keymap to check which installed servers are outdated
            check_outdated_servers = "C",
            -- Keymap to uninstall a server
            uninstall_server = "X",
        },
    },

    -- The directory in which to install all servers.
    install_root_dir = path.concat { vim.fn.stdpath "data", "lsp_servers" },

    pip = {
        -- These args will be added to `pip install` calls. Note that setting extra args might impact intended behavior
        -- and is not recommended.
        --
        -- Example: { "--proxy", "https://proxyserver" }
        install_args = {},
    },

    -- Controls to which degree logs are written to the log file. It's useful to set this to vim.log.levels.DEBUG when
    -- debugging issues with server installations.
    log_level = vim.log.levels.INFO,

    -- Limit for the maximum amount of servers to be installed at the same time. Once this limit is reached, any further
    -- servers that are requested to be installed will be put in a queue.
    max_concurrent_installers = 4,
}