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# This module sets up LSP server configurations for Neovim. It is waaay
# overcomplicated as it kind of turned into an experiment in generating Lua
# code from a Nix attrset.
{ pkgs, lib, ... }:
{
programs.neovim.plugins = [
{
plugin = pkgs.vimPlugins.nvim-lspconfig;
type = "lua";
config = ''
local lspconfig = require("lspconfig")
local util = require("lspconfig.util")
-- Mappings.
-- See `:help vim.diagnostic.*` for documentation on any of the below functions
local opts = { noremap=true, silent=true }
vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float, opts)
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, opts)
-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_attach = function(client, bufnr)
-- Enable completion triggered by <c-x><c-o>
vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
-- Mappings.
-- See `:help vim.lsp.*` for documentation on any of the below functions
local bufopts = { noremap=true, silent=true, buffer=bufnr }
vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
vim.keymap.set('n', '<leader>wa', vim.lsp.buf.add_workspace_folder, bufopts)
vim.keymap.set('n', '<leader>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
vim.keymap.set('n', '<leader>wl', function()
print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
end, bufopts)
vim.keymap.set('n', '<leader>D', vim.lsp.buf.type_definition, bufopts)
vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, bufopts)
vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, bufopts)
vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
vim.keymap.set('n', '<leader>f', function() vim.lsp.buf.format { async = true } end, bufopts)
vim.keymap.set('n', '<leader>s', function() vim.cmd[[ClangdSwitchSourceHeader]] end, bufopts)
end
-- Use a loop to conveniently call 'setup' on multiple servers and
-- map buffer local keybindings when the language server attaches
local servers = {
pyright = { cmd = { "${pkgs.pyright}/bin/pyright-langserver", "--stdio" } },
rnix = { cmd = { "${pkgs.rnix-lsp}/bin/rnix-lsp" } },
denols = {
init_options = {
enable = true,
unstable = true,
lint = true,
},
cmd = { "${pkgs.deno}/bin/deno", "lsp", "--unstable" },
root_dir = function(startpath)
if util.find_package_json_ancestor(startpath) then
-- This is a Node project; let tsserver handle this one.
return nil
else
-- Otherwise, we try to find the root or
-- default to the current directory.
return util.root_pattern("deno.json", "deno.jsonc", ".git")(startpath)
or util.path.dirname(startpath)
end
end,
},
};
for server, config in pairs(servers) do
-- set common options
config.on_attach = on_attach;
config.debounce_text_changes = 150;
lspconfig[server].setup(config)
end
'';
}
];
}
# I spent like an hour writing this, only to find it was a pretty bad idea.
#
# nixToLua = s:
# if builtins.isAttrs s then
# let
# renderAttr = name: value: "[ [==========[" + name + "]==========] ] = " + (nixToLua value);
# attrsList = map (name: renderAttr name s.${name}) (lib.attrNames s);
# attrsListStr = lib.concatStringsSep ", " attrsList;
# in
# "{ ${attrsListStr} }"
# else if builtins.isList s then
# "{ " + (lib.concatStringsSep ", " (map nixToLua s)) + " }"
# else if builtins.isString s then
# # Oh boy I sure hope `s` doesn't contain "]==========]".
# "[==========[" + s + "]==========]"
# else if builtins.isInt s || builtins.isFloat s then
# toString s
# else
# throw "Cannot convert ${builtins.typeOf s} to Lua value!";
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