dotfiles/.config/nvim/lua/plugin/lsp_installer.lua

-- Author        : swytch
-- Created       : Saturday Sept. 11, 2021 22:12:33 CET
-- License       : GPLv3
-- Description   : nvim-lsp-installer plugin config file

local lsp_installer = require("nvim-lsp-installer")

lsp_installer.settings {
    ui = {
        icons = {
            server_installed = "✓",
            server_pending = "o",
            server_uninstalled = "x"
        }
    }
}

local servers = {
        "clangd",
	"sumneko_lua",
}

for _, name in ipairs(servers) do
	local ok, server = lsp_installer.get_server(name)
	-- Check that the server is supported in nvim-lsp-installer
	if ok then
		if not server:is_installed() then
			print("Installing " .. name)
			server:install()
		end
	end
end

local lsp_root_path = vim.fn.stdpath("data") .. "/lsp_servers/"
local runtime_path = vim.split(package.path, ';')


local clangd_binary = lsp_root_path .. "clangd/clangd/bin/clangd"

table.insert(runtime_path, "lua/?.lua")
table.insert(runtime_path, "lua/?/init.lua")

local enhance_server_opts = {
    ["clangd"] = function(opts)
        opts.settings = {
            cmd = { clangd_binary,
                "--background-index",
                "--suggest-missing-includes",
                "--clang-tidy",
                "--header-insertion=iwyu"
            },
        }
    end,
    ["sumneko_lua"] = function(opts)
        opts.settings = {
            Lua = {
                runtime = {
                    -- Tell the language server which version of Lua you're
                    -- using (most likely LuaJIT in the case of Neovim)
                    version = 'LuaJIT',
                    -- Setup your lua path
                    path = runtime_path,
                },
                diagnostics = {
                    -- Get the language server to recognize the `vim` global
                    globals = {
                        "vim",
                        "globals",
                        "utils"
                    },
                },
                workspace = {
                    -- Make the server aware of Neovim runtime files
                    library =
                        vim.api.nvim_get_runtime_file("", true),
                },
                -- Do not send telemetry data containing a randomized but
                -- unique identifier
                telemetry = {
                        enable = false,
                },
            },
        }
    end,
}

local on_attach = function(_, bufnr)
    local opts = { buffer = bufnr }
    vim.keymap.set("n", "gD", vim.lsp.buf.declaration, opts)
    vim.keymap.set("n", "gd", vim.lsp.buf.definition, opts)
    vim.keymap.set("n", "gr", vim.lsp.buf.references, opts)
    vim.keymap.set("n", "K", vim.lsp.buf.hover, opts)
    vim.keymap.set("n", "gi", vim.lsp.buf.implementation, opts)
    vim.keymap.set("n", "<leader>ln", vim.diagnostic.goto_next, opts)
    vim.keymap.set("n", "<leader>lp", vim.diagnostic.goto_prev, opts)
    vim.keymap.set("n", "<leader>lf", vim.lsp.buf.formatting, opts)
    vim.keymap.set("n", "<C-k>", vim.lsp.buf.signature_help, opts)
    vim.keymap.set("n", "<leader>wa",
        vim.lsp.buf.add_workspace_folder, opts)
    vim.keymap.set("n", "<leader>wr",
        vim.lsp.buf.remove_workspace_folder, opts)
    vim.keymap.set("n", "<leader>wl", function()
        vim.inspect(vim.lsp.buf.list_workspace_folders())
    end, opts)
    vim.keymap.set("n", "<leader>D", vim.lsp.buf.type_definition, opts)
    vim.keymap.set("n", "<leader>rn", vim.lsp.buf.rename, opts)
    vim.keymap.set("n", "<leader>ca", vim.lsp.buf.code_action, opts)
    vim.keymap.set("n", "<leader>so",
        require("telescope.builtin").lsp_document_symbols, opts)
end

-- nvim-cmp supports additional completion capabilities
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require("cmp_nvim_lsp").update_capabilities(capabilities)

lsp_installer.on_server_ready(function(server)
    -- Specify the default options which we'll use to setup all servers
    local opts = {
        on_attach = on_attach,
        capabilities = capabilities,
    }

    if enhance_server_opts[server.name] then
        -- Enhance the default opts with the server-specific ones
        enhance_server_opts[server.name](opts)
    end

    server:setup(opts)
end)