Add restart custom command

.dialyzer_ignore.exs

@@ -1 +1,3 @@
-[]
+[
+  {"lib/language_server/providers/execute_command/restart.ex", :no_return}
+]

apps/language_server/.dialyzer_ignore.exs

@@ -0,0 +1,3 @@
+[
+  {"lib/language_server/providers/execute_command/restart.ex", :no_return}
+]

apps/language_server/lib/language_server/providers/execute_command.ex

@@ -3,29 +3,31 @@ defmodule ElixirLS.LanguageServer.Providers.ExecuteCommand do
   Adds a @spec annotation to the document when the user clicks on a code lens.
   """
 
-  @callback execute([any], %ElixirLS.LanguageServer.Server{}) ::
-              {:ok, any} | {:error, atom, String.t()}
-
-  def execute(command, args, state) do
-    handler =
-      case command do
-        "spec:" <> _ ->
-          ElixirLS.LanguageServer.Providers.ExecuteCommand.ApplySpec
+  alias ElixirLS.LanguageServer.Providers.ExecuteCommand
 
-        "expandMacro:" <> _ ->
-          ElixirLS.LanguageServer.Providers.ExecuteCommand.ExpandMacro
+  @handlers %{
+    "spec" => ExecuteCommand.ApplySpec,
+    "expandMacro" => ExecuteCommand.ExpandMacro,
+    "manipulatePipes" => ExecuteCommand.ManipulatePipes,
+    "restart" => ExecuteCommand.Restart
+  }
 
-        "manipulatePipes:" <> _ ->
-          ElixirLS.LanguageServer.Providers.ExecuteCommand.ManipulatePipes
-
-        _ ->
-          nil
-      end
+  @callback execute([any], %ElixirLS.LanguageServer.Server{}) ::
+              {:ok, any} | {:error, atom, String.t()}
 
-    if handler do
+  def execute(command_with_server_id, args, state) do
+    with [command, _server_id] <- String.split(command_with_server_id, ":"),
+         handler when not is_nil(handler) <- Map.get(@handlers, command) do
       handler.execute(args, state)
     else
-      {:error, :invalid_request, nil}
+      _ ->
+        {:error, :invalid_request, nil}
+    end
+  end
+
+  def get_commands(server_instance_id) do
+    for {k, _v} <- @handlers do
+      "#{k}:#{server_instance_id}"
     end
   end
 end

apps/language_server/lib/language_server/providers/execute_command/restart.ex

@@ -0,0 +1,8 @@
+defmodule ElixirLS.LanguageServer.Providers.ExecuteCommand.Restart do
+  @behaviour ElixirLS.LanguageServer.Providers.ExecuteCommand
+
+  @impl ElixirLS.LanguageServer.Providers.ExecuteCommand
+  def execute(_args, _state) do
+    System.halt(0)
+  end
+end

apps/language_server/lib/language_server/server.ex

@@ -810,11 +810,7 @@ defmodule ElixirLS.LanguageServer.Server do
       "documentOnTypeFormattingProvider" => %{"firstTriggerCharacter" => "\n"},
       "codeLensProvider" => %{"resolveProvider" => false},
       "executeCommandProvider" => %{
-        "commands" => [
-          "spec:#{server_instance_id}",
-          "expandMacro:#{server_instance_id}",
-          "manipulatePipes:#{server_instance_id}"
-        ]
+        "commands" => ExecuteCommand.get_commands(server_instance_id)
       },
       "workspace" => %{
         "workspaceFolders" => %{"supported" => false, "changeNotifications" => false}