feat: dispose action after use

Author: lambdalisue

denops/fall/lib/dispose.ts

@@ -23,3 +23,16 @@ export async function dispose(resource: unknown): Promise<void> {
     await resource[Symbol.asyncDispose]();
   }
 }
+
+/**
+ * Ensure the resource is async disposable.
+ */
+export function ensureAsyncDisposable<T>(resource: T): T & AsyncDisposable {
+  if (isAsyncDisposable(resource)) {
+    return resource as T & AsyncDisposable;
+  }
+  return {
+    ...resource,
+    [Symbol.asyncDispose]: () => Promise.resolve(),
+  };
+}

denops/fall/main/picker.ts

@@ -16,6 +16,7 @@ import type {
   ItemPickerParams,
 } from "jsr:@vim-fall/std@^0.2.0/config";
 
+import { ensureAsyncDisposable } from "../lib/dispose.ts";
 import {
   getActionPickerParams,
   getGlobalConfig,
@@ -183,6 +184,7 @@ async function startPicker(
     if (!action) {
       throw new Error(`Action "${actionName}" is not found`);
     }
+    await using _guardAction = ensureAsyncDisposable(action);
     const actionParams = {
       // for 'submatch' action
       _submatchContext: {