Languages

Every language has a switch zenvim.languages.<language>.enable and one sub-option per feature it supports (lsp, format, lint, dap, test, render). Sub-options default to the language switch and can be toggled on their own:

zenvim.languages.python = {
  enable = true;
  dap.enable = false;
};

The supported features per language are declared in nixvim/languages/features.nix. Shared plugins follow the languages: lspconfig, conform, nvim-lint, nvim-dap with dap-ui and neotest with nvim-coverage are only part of the configuration if at least one language enables the corresponding feature (see Plugins).

How tools are provided

Language servers are enabled with Nixvim’s packageFallback = true. The server from nixpkgs is appended to the end of PATH, so a server installed in the project (e.g. through a devshell) is used first.
Formatters and linters are added with extraPackagesAfter, which also appends them to PATH.
Tools marked as not bundled below must come from the system or the project environment.

Overview

Language	LSP	Format	Lint	DAP	Test
`lua`	lua_ls + lazydev	stylua	–	–	neotest-plenary
`nix`	nil	alejandra	statix	–	–
`python`	pyright	isort + ruff_format (not bundled)	ruff (not bundled)	nvim-dap-python	neotest-python
`go`	gopls	gofmt (not bundled) + golines	staticcheck (not bundled)	nvim-dap-go	–
`rust`	rustaceanvim + crates	rustfmt (not bundled)	–	nvim-dap-lldb (codelldb)	neotest-rust
`shell`	bash-language-server	shfmt	shellcheck	–	–
`html`	vscode-html-language-server	prettierd	–	–	–
`css`	–	prettierd	stylelint	–	–
`typescript`	typescript-tools	deno fmt	eslint	–	–
`svelte`	svelte-language-server	prettierd	eslint	–	–
`tailwind`	tailwindcss-language-server	–	–	–	–
`json`	vscode-json-language-server	deno fmt	–	–	–
`yaml`	yaml-language-server	–	–	–	–
`sql`	sqls	–	–	–	–
`docker`	dockerfile-language-server	–	–	–	–
`markdown`	–	deno fmt	–	–	–

Details

Lua

LSP: lua_ls with signature help; vim and hl are known globals and the missing-fields diagnostic is disabled. lazydev provides completion for the Neovim Lua API.
Format: stylua.
Test: neotest-plenary for plenary/busted test files.

Nix

LSP: nil.
Format: alejandra.
Lint: statix.

Python

LSP: pyright.
Format: isort, then ruff format – both not bundled.
Lint: ruff – not bundled.
DAP: nvim-dap-python.
Test: neotest-python with justMyCode = false, so debugging a test also steps into library code.

Go

LSP: gopls.
Format: gofmt (not bundled), then golines.
Lint: staticcheck – not bundled.
DAP: nvim-dap-go.

Rust

LSP: rustaceanvim, plus crates.nvim for Cargo.toml. rust-analyzer is not bundled, so the toolchain version of the project is used.
Format: rustfmt – not bundled.
DAP: nvim-dap-lldb using the bundled codelldb adapter from the vscode-lldb extension.
Test: neotest-rust.

Shell

Applies to the sh and bash filetypes.

LSP: bash-language-server.
Format: shfmt.
Lint: shellcheck.

HTML

LSP: vscode-html-language-server.
Format: prettierd for html and htmldjango.

CSS

Format: prettierd.
Lint: stylelint.

TypeScript

Applies to the javascript and typescript filetypes.

LSP: typescript-tools.nvim.
Format: deno fmt.
Lint: eslint.

Svelte

LSP: svelte-language-server.
Format: prettierd.
Lint: eslint.

Tailwind, JSON, YAML, SQL, Docker

Tailwind: tailwindcss-language-server.
JSON: vscode-json-language-server; formatting with deno fmt.
YAML: yaml-language-server.
SQL: sqls. The default SQL omni-completion mappings of Neovim are disabled (omni_sql_no_default_maps).
Docker: dockerfile-language-server.

Markdown

Format: deno fmt.
Render: render-markdown.nvim. Rendering is off by default and toggled per buffer with <leader>mt; <leader>mp opens a preview.

Keyboard shortcuts

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