refactor(lsp): add "deno.reloadImportRegistries" as a command (#20823)

cli/lsp/capabilities.rs

@@ -121,7 +121,10 @@ pub fn server_capabilities(
     color_provider: None,
     execute_command_provider: Some(ExecuteCommandOptions {
       commands: if enable_builtin_commands {
-        vec!["deno.cache".into()]
+        vec![
+          "deno.cache".to_string(),
+          "deno.reloadImportRegistries".to_string(),
+        ]
       } else {
         vec![]
       },

cli/lsp/language_server.rs

@@ -3035,7 +3035,7 @@ impl tower_lsp::LanguageServer for LanguageServer {
       let referrer = serde_json::to_value(arguments.next()).unwrap();
       let referrer: Url = serde_json::from_value(referrer)
         .map_err(|err| LspError::invalid_params(err.to_string()))?;
-      return self
+      self
         .cache_request(Some(
           serde_json::to_value(lsp_custom::CacheParams {
             referrer: TextDocumentIdentifier { uri: referrer },
@@ -3046,9 +3046,12 @@ impl tower_lsp::LanguageServer for LanguageServer {
           })
           .expect("well formed json"),
         ))
-        .await;
+        .await
+    } else if params.command == "deno.reloadImportRegistries" {
+      self.0.write().await.reload_import_registries().await
+    } else {
+      Ok(None)
     }
-    Ok(None)
   }
 
   async fn initialize(

cli/lsp/mod.rs

@@ -49,6 +49,9 @@ pub async fn start() -> Result<(), AnyError> {
     lsp_custom::PERFORMANCE_REQUEST,
     LanguageServer::performance_request,
   )
+  // TODO(nayeemrmn): The extension has replaced this with the
+  // `deno.reloadImportRegistries` command as of vscode_deno
+  // 3.26.0 / 2023.10.10. Remove this eventually.
   .custom_method(
     lsp_custom::RELOAD_IMPORT_REGISTRIES_REQUEST,
     LanguageServer::reload_import_registries_request,

cli/tests/integration/lsp_tests.rs

@@ -872,6 +872,18 @@ fn lsp_deno_task() {
   );
 }
 
+#[test]
+fn lsp_reload_import_registries_command() {
+  let context = TestContextBuilder::new().use_temp_cwd().build();
+  let mut client = context.new_lsp_command().build();
+  client.initialize_default();
+  let res = client.write_request(
+    "workspace/executeCommand",
+    json!({ "command": "deno.reloadImportRegistries" }),
+  );
+  assert_eq!(res, json!(true));
+}
+
 #[test]
 fn lsp_import_attributes() {
   let context = TestContextBuilder::new().use_temp_cwd().build();