feat(extension,credo): ability to disable Credo extension (#321)

lib/next_ls.ex

@@ -67,7 +67,7 @@ defmodule NextLS do
 
     registry = Keyword.fetch!(args, :registry)
 
-    extensions = Keyword.get(args, :extensions, [NextLS.ElixirExtension, NextLS.CredoExtension])
+    extensions = Keyword.get(args, :extensions, elixir: NextLS.ElixirExtension, credo: NextLS.CredoExtension)
     cache = Keyword.fetch!(args, :cache)
     {:ok, logger} = DynamicSupervisor.start_child(dynamic_supervisor, {NextLS.Logger, lsp: lsp})
 
@@ -598,16 +598,23 @@ defmodule NextLS do
         )
     end
 
-    for extension <- lsp.assigns.extensions do
-      {:ok, _} =
+    for {id, extension} <- lsp.assigns.extensions do
+      child =
         DynamicSupervisor.start_child(
           lsp.assigns.dynamic_supervisor,
           {extension,
+           settings: Map.fetch!(lsp.assigns.init_opts.extensions, id),
+           logger: lsp.assigns.logger,
            cache: lsp.assigns.cache,
            registry: lsp.assigns.registry,
            publisher: self(),
            task_supervisor: lsp.assigns.runtime_task_supervisor}
         )
+
+      case child do
+        {:ok, _pid} -> :ok
+        :ignore -> :ok
+      end
     end
 
     with %{dynamic_registration: true} <- lsp.assigns.client_capabilities.workspace.did_change_watched_files do
@@ -1092,11 +1099,25 @@ defmodule NextLS do
     defstruct completions: %{enable: false}
   end
 
+  defmodule InitOpts.Extensions.Credo do
+    @moduledoc false
+    defstruct enable: true
+  end
+
+  defmodule InitOpts.Extensions do
+    @moduledoc false
+    defstruct elixir: %{enable: true},
+              credo: %NextLS.InitOpts.Extensions.Credo{}
+  end
+
   defmodule InitOpts do
     @moduledoc false
     import Schematic
 
-    defstruct mix_target: "host", mix_env: "dev", experimental: %NextLS.InitOpts.Experimental{}
+    defstruct mix_target: "host",
+              mix_env: "dev",
+              experimental: %NextLS.InitOpts.Experimental{},
+              extensions: %NextLS.InitOpts.Extensions{}
 
     def validate(opts) do
       schematic =
@@ -1110,6 +1131,17 @@ defmodule NextLS do
                   map(%{
                     {"enable", :enable} => bool()
                   })
+              }),
+            optional(:extensions) =>
+              schema(NextLS.InitOpts.Extensions, %{
+                optional(:credo) =>
+                  schema(NextLS.InitOpts.Extensions.Credo, %{
+                    optional(:enable) => bool()
+                  }),
+                optional(:elixir) =>
+                  map(%{
+                    {"enable", :enable} => bool()
+                  })
               })
           })
         )

lib/next_ls/extensions/credo_extension.ex

@@ -13,7 +13,7 @@ defmodule NextLS.CredoExtension do
   def start_link(args) do
     GenServer.start_link(
       __MODULE__,
-      Keyword.take(args, [:cache, :registry, :publisher, :task_supervisor]),
+      Keyword.take(args, [:cache, :registry, :publisher, :task_supervisor, :settings, :logger]),
       Keyword.take(args, [:name])
     )
   end
@@ -24,18 +24,29 @@ defmodule NextLS.CredoExtension do
     registry = Keyword.fetch!(args, :registry)
     publisher = Keyword.fetch!(args, :publisher)
     task_supervisor = Keyword.fetch!(args, :task_supervisor)
-
-    Registry.register(registry, :extensions, :credo)
-
-    {:ok,
-     %{
-       runtimes: Map.new(),
-       cache: cache,
-       registry: registry,
-       task_supervisor: task_supervisor,
-       publisher: publisher,
-       refresh_refs: Map.new()
-     }}
+    settings = Keyword.fetch!(args, :settings)
+    logger = Keyword.fetch!(args, :logger)
+
+    if settings.enable do
+      Registry.register(registry, :extensions, :credo)
+
+      NextLS.Logger.log(logger, "[extension] Credo initializing with options #{inspect(settings)}")
+
+      {:ok,
+       %{
+         runtimes: Map.new(),
+         cache: cache,
+         registry: registry,
+         task_supervisor: task_supervisor,
+         publisher: publisher,
+         settings: settings,
+         logger: logger,
+         refresh_refs: Map.new()
+       }}
+    else
+      NextLS.Logger.log(logger, "[extension] Credo disabled")
+      :ignore
+    end
   end
 
   @impl GenServer

test/next_ls/extensions/credo_extension_test.exs

@@ -38,13 +38,31 @@ defmodule NextLS.CredoExtensionTest do
 
   setup :with_lsp
 
+  @tag init_options: %{"extensions" => %{"credo" => %{"enable" => false}}}
+  test "disables Credo", %{client: client, foo: foo} = context do
+    assert :ok == notify(client, %{method: "initialized", jsonrpc: "2.0", params: %{}})
+
+    assert_is_ready(context, "my_proj")
+    assert_compiled(context, "my_proj")
+
+    assert_notification "window/logMessage", %{
+      "message" => "[NextLS] [extension] Credo disabled",
+      "type" => 4
+    }
+  end
+
   test "publishes credo diagnostics", %{client: client, foo: foo} = context do
     assert :ok == notify(client, %{method: "initialized", jsonrpc: "2.0", params: %{}})
 
     assert_is_ready(context, "my_proj")
     assert_compiled(context, "my_proj")
     assert_notification "$/progress", %{"value" => %{"kind" => "end", "message" => "Finished indexing!"}}
 
+    assert_notification "window/logMessage", %{
+      "message" => "[NextLS] [extension] Credo initializing with options" <> _,
+      "type" => 4
+    }
+
     uri = uri(foo)
 
     assert_notification "textDocument/publishDiagnostics", %{

test/support/utils.ex

@@ -44,8 +44,9 @@ defmodule NextLS.Support.Utils do
     r_tvisor = start_supervised!(Supervisor.child_spec(Task.Supervisor, id: :two))
     rvisor = start_supervised!({DynamicSupervisor, [strategy: :one_for_one]})
     start_supervised!({Registry, [keys: :duplicate, name: context.module]})
-    extensions = [NextLS.ElixirExtension, NextLS.CredoExtension]
+    extensions = [elixir: NextLS.ElixirExtension, credo: NextLS.CredoExtension]
     cache = start_supervised!(NextLS.DiagnosticCache)
+    init_options = context[:init_options] || %{}
 
     server =
       server(NextLS,
@@ -67,6 +68,7 @@ defmodule NextLS.Support.Utils do
                id: 1,
                jsonrpc: "2.0",
                params: %{
+                 initializationOptions: init_options,
                  capabilities: %{
                    workspace: %{
                      workspaceFolders: true