how to configure options for each server?

[shaeinst]

for example, in following code snippet, i have configured sumneko_lua and clangd. Or what would be mason.nvim for following code snippet

local function setup_lsp(on_attach)
	local installed_servers = lspinstaller.get_installed_servers()
	local capabilities = lsp.protocol.make_client_capabilities()
	local lsp_options = {
		on_attach = on_attach,
		flags = {debounce_text_changes = 150, },
		capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities),
	}

	-- don't setup servers if atleast one server is installed, or it will throw an error
	if #installed_servers == 0 then return end

	for _, server in ipairs(installed_servers) do
		local server_options = {}

		-- for lua
		if server.name == "sumneko_lua" then
			server_options.settings = {
				Lua = {
					diagnostics = {
						-- Get the language server to recognize the 'vim', 'use' global
						globals = {'vim', 'use', 'require'},
					},
					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

		-- for clangd (c/c++)
		-- [https://github.com/jose-elias-alvarez/null-ls.nvim/issues/428]
		if server.name == "clangd" then
			capabilities.offsetEncoding = { "utf-16" }
			server_options.capabilities = capabilities
		end

		lspconfig[server.name].setup(vim.tbl_deep_extend('force', lsp_options, server_options))
	end
end

[williamboman]

Hello! What have you tried so far? Have you seen :h mason-lspconfig and :h mason-lspconfig-automatic-server-setup in particular?

[shaeinst]

i did something like this

local lspconfig_imported, lspconfig = pcall(require, 'lspconfig')
if not lspconfig_imported then return end
local lsp = vim.lsp


local function setup_lsp(on_attach)
	local capabilities = lsp.protocol.make_client_capabilities()
	local lsp_options = {
		on_attach = on_attach,
		flags = {
			debounce_text_changes = 150,
		},
		capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities),
	}

	local mason_lspconfig = require("mason-lspconfig")

	mason_lspconfig.setup_handlers {
		function()

			local server_options = {}

			server_options.settings = {
				Lua = {
					diagnostics = {
						-- Get the language server to recognize the 'vim', 'use' global
						globals = {'vim', 'use', 'require'},
					},
					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},
				},
			}
			lspconfig["sumneko_lua"].setup(vim.tbl_deep_extend('force', lsp_options, server_options))
		end
	}
end


local imported_mason, mason = pcall(require, 'mason')
if not imported_mason then return end

local imported_mason_config, mason_config = pcall(require, "plugins.mason_nvim")
if not imported_mason_config then return end

-- `lspconfig` needs to be available when setting up `mason-lspconfig` - so if you lazy load,
-- either plugin make sure `lspconfig` is not loaded after `mason-lspconfig`.
setup_lsp_config() -- setup lsp configs (mainly UI)
mason.setup(mason_config.setup)
setup_lsp(on_attach) -- setup lsp (like pyright, ccls ...)

and i am not sure if option is applying to sumneko_lua or not.

[williamboman]

Hm not quite sure. The .setup_handlers() usage is a bit problematic due to how you don't read the server_name argument to the function and instead hard-coded a sumneko_lua setup. Did you read :h mason-lspconfig.setup_handlers? I'd otherwise suggest following lspconfig's suggested config if you can't get it to work!

[shaeinst]

yep

Did you read :h mason-lspconfig.setup_handlers?

ok, i reconfigured it as

local function setup_lsp(on_attach)

	local installed_packages = require('mason-registry').get_installed_packages()
	local capabilities = lsp.protocol.make_client_capabilities()
	local lsp_options = {
		on_attach = on_attach,
		flags = {
			debounce_text_changes = 150,
		},
		capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities),
	}

	-- for Flutter and Dart
	-- don't put this on loop to set it because dart LSP installed and maintained by akinsho/flutter-tools.nvim
	lspconfig["dartls"].setup(lsp_options)

	-- don't setup servers if atleast one server is installed, or it will throw an error
	if #installed_packages == 0 then return end

	for _, server in ipairs(installed_packages) do
		local server_options = {}

		-- for lua
		if server.name == "sumneko_lua" then
			server_options.settings = {
				Lua = {
					diagnostics = {
						-- Get the language server to recognize the 'vim', 'use' global
						globals = {'vim', 'use', 'require'},
					},
					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

		-- for clangd (c/c++)
		-- [https://github.com/jose-elias-alvarez/null-ls.nvim/issues/428]
		if server.name == "clangd" then
			capabilities.offsetEncoding = { "utf-16" }
			server_options.capabilities = capabilities
		end

		-- for html
		if server.name == "html" then
			server_options.filetypes = {"html", "htmldjango"}
		end

		-- for css / scss / sass
		if server.name == "cssls" then
			capabilities.textDocument.completion.completionItem.snippetSupport = true
			server_options.capabilities = capabilities
		end

		lspconfig[server.name].setup(vim.tbl_deep_extend('force', lsp_options, server_options))
	end
end

local imported_mason_config, mason_config = pcall(require, "plugins.mason_nvim")
if not imported_mason_config then return end

mason.setup(mason_config.setup) -- setup mason
setup_lsp_config() -- setup lsp configs (mainly UI)
setup_lsp(on_attach) -- setup lsp (like pyright, ccls ...)

everything is working as expected, except lua server. i'm getting following error after installing ua-language-server

[lspconfig] Cannot access configuration for lua-language-server. Ensure this server is listed in `server_configurations.md` or added as a custom server.

[williamboman]

The reason it's erroring is because in Mason the Lua language server package is called lua-language-server, and lspconfig calls it by a different name sumneko_lua. I'd really like to avoid spending time providing code snippets for peoples own configs but I feel like we're not progressing, I'll try to see how docs can be made clearer. Try something like this:

require("mason-lspconfig").setup_handlers({
    function (server_name)
        require("lspconfig")[server_name].setup(lsp_options)
    end,
    ["clangd"] = function ()
        require("lspconfig").clangd.setup(vim.tbl_deep_extend("force", lsp_options, {
            capabilities = { offsetEncoding = { "utf-16" } }
        }))
    end,
    ["html"] = function ()
        require("lspconfig").html.setup(vim.tbl_deep_extend("force", lsp_options, {
            filetypes = {"html", "htmldjango"}
        }))
    end,
    ["cssls"] = function ()
        require("lspconfig").cssls.setup(vim.tbl_deep_extend("force", lsp_options, {
            capabilities = {
                textDocument = {
                    completion= {
                        completionItem = { snippetSupport = true }
                    }
                }
            },
        }))
    end,
    ["sumneko_lua"] = function ()
        require("lspconfig").sumneko_lua.setup(vim.tbl_deep_extend("force", lsp_options, {
            settings = {
                Lua = {
                    diagnostics = {
                        -- Get the language server to recognize the 'vim', 'use' global
                        globals = {'vim', 'use', 'require'},
                    },
                    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
})

[punowo]

I know this was already answered but here's how I handled it. Formatting is disabled because I use null-ls for that and I have the lsp mappings in another file.

  local vim = vim
  local lspconfig = require("lspconfig")
  require("mason").setup()
  require("mason-lspconfig").setup({
      ensure_installed = { "bashls", "sumneko_lua" },
  })

  local default_on_attach = function(client)
      require("mappings").keys_lsp()
      client.resolved_capabilities.document_formatting = false
      client.resolved_capabilities.document_range_formatting = false
  end
  local default_capabilities = require("cmp_nvim_lsp").update_capabilities(vim.lsp.protocol.make_client_capabilities())

  lspconfig.util.default_config = vim.tbl_extend("force", lspconfig.util.default_config, {
      on_attach = default_on_attach,
      capabilities = default_capabilities,
  })

  function M.setup_default()
      require("mason-lspconfig").setup_handlers({
          function(server_name)
              lspconfig[server_name].setup({})
          end,
          ["sumneko_lua"] = function()
              lspconfig.sumneko_lua.setup({
                  settings = {
                      Lua = {
                          runtime = {
                              version = "LuaJIT",
                          },
                          diagnostics = {
                              globals = { "vim", "use", "require" },
                          },
                          workspace = {
                              library = vim.api.nvim_get_runtime_file("", true),
                          },
                          telemetry = {
                              enable = false,
                          },
                      },
                  },
              })
          end,
      })
  end