6 files changed, 72 insertions, 41 deletions
diff --git a/lua/mason-lspconfig/automatic_enable.lua b/lua/mason-lspconfig/automatic_enable.lua
deleted file mode 100644
index b1f0046..0000000
--- a/lua/mason-lspconfig/automatic_enable.lua
+++ /dev/null
@@ -1,32 +0,0 @@
-local _ = require "mason-core.functional"
-local mappings = require "mason-lspconfig.mappings"
-local registry = require "mason-registry"
-local settings = require "mason-lspconfig.settings"
-
----@param mason_pkg string
-local function setup_server(mason_pkg)
-    local lspconfig_name = mappings.get_mason_map().package_to_lspconfig[mason_pkg]
-    if not lspconfig_name then
-        return
-    end
-
-    -- We don't provide LSP configurations in the lsp/ directory because it risks overriding configurations in a way the
-    -- user doesn't want. Instead we only override LSP configurations for servers that are installed via Mason.
-    local ok, config = pcall(require, ("mason-lspconfig.lsp.%s"):format(lspconfig_name))
-    if ok then
-        vim.lsp.config(lspconfig_name, config)
-    end
-
-    if settings.current.automatic_enable then
-        vim.lsp.enable(lspconfig_name)
-    end
-end
-
-_.each(setup_server, registry.get_installed_package_names())
-
-registry:on(
-    "package:install:success",
-    vim.schedule_wrap(function(pkg)
-        setup_server(pkg.name)
-    end)
-)
diff --git a/lua/mason-lspconfig/features/automatic_enable.lua b/lua/mason-lspconfig/features/automatic_enable.lua
new file mode 100644
index 0000000..34ae265
--- /dev/null
+++ b/lua/mason-lspconfig/features/automatic_enable.lua
@@ -0,0 +1,54 @@
+local _ = require "mason-core.functional"
+local mappings = require "mason-lspconfig.mappings"
+local registry = require "mason-registry"
+local settings = require "mason-lspconfig.settings"
+
+---@param mason_pkg string | Package
+local function enable_server(mason_pkg)
+    if type(mason_pkg) ~= "string" then
+        mason_pkg = mason_pkg.name
+    end
+    local lspconfig_name = mappings.get_mason_map().package_to_lspconfig[mason_pkg]
+    if not lspconfig_name then
+        return
+    end
+
+    local automatic_enable = settings.current.automatic_enable
+
+    if type(automatic_enable) == "table" then
+        local exclude = automatic_enable.exclude
+        if exclude then
+            if _.any(_.equals(lspconfig_name), exclude) then
+                -- This server is explicitly excluded.
+                return
+            end
+        else
+            if not _.any(_.equals(lspconfig_name), automatic_enable) then
+                -- This server is not explicitly enabled.
+                return
+            end
+        end
+    elseif automatic_enable == false then
+        return
+    end
+
+    -- We don't provide LSP configurations in the lsp/ directory because it risks overriding configurations in a way the
+    -- user doesn't want. Instead we only override LSP configurations for servers that are installed via Mason.
+    local ok, config = pcall(require, ("mason-lspconfig.lsp.%s"):format(lspconfig_name))
+    if ok then
+        vim.lsp.config(lspconfig_name, config)
+    end
+
+    vim.lsp.enable(lspconfig_name)
+end
+
+local enable_server_scheduled = vim.schedule_wrap(enable_server)
+
+return function()
+    _.each(enable_server, registry.get_installed_package_names())
+
+    -- We deregister the event handler primarily for testing purposes where .setup() is called multiple times in the
+    -- same instance
+    registry:off("package:install:success", enable_server_scheduled)
+    registry:on("package:install:success", enable_server_scheduled)
+end
diff --git a/lua/mason-lspconfig/ensure_installed.lua b/lua/mason-lspconfig/features/ensure_installed.lua
index 583feec..583feec 100644
--- a/lua/mason-lspconfig/ensure_installed.lua
+++ b/lua/mason-lspconfig/features/ensure_installed.lua
diff --git a/lua/mason-lspconfig/init.lua b/lua/mason-lspconfig/init.lua
index ff37463..631a78f 100644
--- a/lua/mason-lspconfig/init.lua
+++ b/lua/mason-lspconfig/init.lua
@@ -27,9 +27,9 @@ function M.setup(config)
     local registry = require "mason-registry"
     registry.refresh(vim.schedule_wrap(function()
         if not platform.is_headless and #settings.current.ensure_installed > 0 then
-            require "mason-lspconfig.ensure_installed"()
+            require "lua.mason-lspconfig.features.ensure_installed"()
         end
-        require "mason-lspconfig.automatic_enable"
+        require "lua.mason-lspconfig.features.automatic_enable"()
         registry.register_package_aliases(_.map(function(server_name)
             return { server_name }
         end, require("mason-lspconfig.mappings").get_mason_map().package_to_lspconfig))
diff --git a/lua/mason-lspconfig/mappings.lua b/lua/mason-lspconfig/mappings.lua
index 98cc8c4..2523aed 100644
--- a/lua/mason-lspconfig/mappings.lua
+++ b/lua/mason-lspconfig/mappings.lua
@@ -4,13 +4,6 @@ local registry = require "mason-registry"
 local M = {}
 
 function M.get_mason_map()
-    if not registry.get_all_package_specs then
-        return {
-            lspconfig_to_package = {},
-            package_to_lspconfig = {},
-        }
-    end
-
     ---@type table<string, string>
     local package_to_lspconfig = {}
     for _, pkg_spec in ipairs(registry.get_all_package_specs()) do
diff --git a/lua/mason-lspconfig/settings.lua b/lua/mason-lspconfig/settings.lua
index cadc31e..1c6b3ec 100644
--- a/lua/mason-lspconfig/settings.lua
+++ b/lua/mason-lspconfig/settings.lua
@@ -7,6 +7,22 @@ local DEFAULT_SETTINGS = {
     ensure_installed = {},
 
     -- Whether installed servers should automatically be enabled via `:h vim.lsp.enable()`.
+    --
+    -- To exclude certain servers from being automatically enabled:
+    -- ```lua
+    --   automatic_enable = {
+    --     exclude = { "rust_analyzer", "ts_ls" }
+    --   }
+    -- ```
+    --
+    -- To only enable certain servers to be automatically enabled:
+    -- ```lua
+    --   automatic_enable = {
+    --     "lua_ls",
+    --     "vimls"
+    --   }
+    -- ```
+    ---@type boolean | string[] | { exclude: string[] }
     automatic_enable = true,
 }