dotfiles/vim/lua/lsp_config.lua

local nvim_lsp = require("lspconfig")

local on_attach = function(client, bufnr)
	-- TODO: use vim.api.nvim_create_autocmd
	vim.api.nvim_exec2([[autocmd User LspDiagnosticsChanged call lightline#update()]], { output = false })

	local opts = { noremap = true, silent = false }
	vim.api.nvim_buf_set_keymap(bufnr, "n", "gd", "<Cmd>lua vim.lsp.buf.definition()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "gD", "<Cmd>lua vim.lsp.buf.type_definition()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>gd", "<Cmd>lua vim.lsp.buf.definition()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>gD", "<Cmd>lua vim.lsp.buf.type_definition()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>e", "<Cmd>lua vim.lsp.buf.rename()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>r", "<Cmd>lua vim.lsp.buf.references()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>i", "<Cmd>lua vim.lsp.buf.implementation()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ca", "<Cmd>lua vim.lsp.buf.code_action()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ci", "<Cmd>lua vim.lsp.buf.incoming_calls()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>co", "<Cmd>lua vim.lsp.buf.outgoing_calls()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "K", "<Cmd>lua vim.lsp.buf.hover()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "]e", '<Cmd>lua vim.diagnostic.goto_next({severity="Error"})<CR>', opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "[e", '<Cmd>lua vim.diagnostic.goto_prev({severity="Error"})<CR>', opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "]d", "<Cmd>lua vim.diagnostic.goto_next()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "[d", "<Cmd>lua vim.diagnostic.goto_prev()<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "cd", "<Cmd>lua vim.diagnostic.hide(nil, 0)<CR>", opts)

	-- fzf triggers:
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fr", "<Cmd>References<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fi", "<Cmd>Implementations<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fs", "<Cmd>DocumentSymbols<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fw", "<Cmd>WorkspaceSymbols<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fc", "<Cmd>CodeActions<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fci", "<Cmd>IncomingCalls<CR>", opts)
	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>fco", "<Cmd>OutgoingCalls<CR>", opts)

	require("lsp_signature").on_attach({
		hint_enable = false,
	})

	require("copilot_cmp").setup()
end

-- Go

local capabilities = require("cmp_nvim_lsp").default_capabilities()
capabilities.textDocument.completion.completionItem.snippetSupport = true
capabilities.textDocument.completion.completionItem.resolveSupport = {
	properties = {
		"documentation",
		"detail",
		"additionalTextEdits",
	},
}

nvim_lsp.gopls.setup({
	settings = {
		gopls = {
			staticcheck = true,
			-- Disalbing linksInHover may not be working as expected:
			linksInHover = false,
			usePlaceholders = true,
			analyses = {
				unusedparams = true,
				shadow = true,
				unusedwrite = true,
				unusedresult = true,
				nilness = true,
			},
		},
	},
	capabilities = capabilities,
	on_attach = on_attach,
})

-- Rust
nvim_lsp.rust_analyzer.setup({
	capabilities = capabilities,
	on_attach = on_attach,
	settings = {
		["rust-analyzer"] = {
			imports = {
				granularity = {
					group = "module",
				},
				prefix = "self",
			},
			cargo = {
				buildScripts = {
					enable = true,
				},
			},
			procMacro = {
				enable = false,
			},
			diagnostics = {
				disabled = { "unresolved-proc-macro" },
			},
		},
	},
})

-- Ruby

nvim_lsp.solargraph.setup({
	on_attach = on_attach,
})

-- Typescript
-- https://jose-elias-alvarez.medium.com/configuring-neovims-lsp-client-for-typescript-development-5789d58ea9c

nvim_lsp.tsserver.setup({
	on_attach = on_attach,
})

local filetypes = {
	typescript = "eslint",
	typescriptreact = "eslint",
}

-- diagnosticls

local linters = {
	eslint = {
		sourceName = "eslint",
		-- fallback to global eslint if the local is not found?
		-- https://github.com/creativenull/diagnosticls-configs-nvim/blob/e7d6f7e99f6b416d2aeee89314bc46fc36df7b22/lua/diagnosticls-configs/fs.lua#L20
		command = "./node_modules/.bin/eslint",
		rootPatterns = { ".eslintrc", ".eslintrc.js" },
		debounce = 100,
		args = { "--stdin", "--stdin-filename", "%filepath", "--format", "json" },
		parseJson = {
			errorsRoot = "[0].messages",
			line = "line",
			column = "column",
			endLine = "endLine",
			endColumn = "endColumn",
			message = "${message} [${ruleId}]",
			security = "severity",
		},
		securities = { [1] = "error", [2] = "warning" },
	},
}

nvim_lsp.diagnosticls.setup({
	on_attach = on_attach,
	filetypes = vim.tbl_keys(filetypes),
	init_options = {
		linters = linters,
		filetypes = filetypes,
	},
})

-- Lua

local runtime_path = vim.split(package.path, ";")
table.insert(runtime_path, "lua/?.lua")
table.insert(runtime_path, "lua/?/init.lua")

nvim_lsp.lua_ls.setup({
	settings = {
		Lua = {
			runtime = {
				version = "LuaJIT",
				path = runtime_path,
			},
			diagnostics = {
				globals = { "vim" },
			},
			workspace = {
				library = vim.api.nvim_get_runtime_file("", true),
			},
			telemetry = {
				enable = false,
			},
		},
	},
	on_attach = on_attach,
})