fix(command): command action not triggered for standalone options wit…

…hout action handler (#654)

command/command.ts

@@ -1766,15 +1766,15 @@ export class Command<
         await Promise.all(
           ctx.actions.map((action) => action.call(this, options, ...args)),
         );
-      }
 
-      if (ctx.standalone) {
-        return {
-          options,
-          args,
-          cmd: this,
-          literal: this.literalArgs,
-        };
+        if (ctx.standalone) {
+          return {
+            options,
+            args,
+            cmd: this,
+            literal: this.literalArgs,
+          };
+        }
       }
 
       return await this.execute(options, args);

command/test/command/standalone_test.ts

@@ -0,0 +1,63 @@
+import {
+  assertEquals,
+  assertRejects,
+  assertSpyCalls,
+  spy,
+} from "../../../dev_deps.ts";
+import { Command } from "../../command.ts";
+
+Deno.test("[command] should execute standalone option action", async () => {
+  const actionSpy = spy();
+  const optionActionSpy = spy();
+
+  const cmd = new Command()
+    .throwErrors()
+    .option("--standalone", "description ...", {
+      action: optionActionSpy,
+      standalone: true,
+    })
+    .action(actionSpy);
+
+  const { options } = await cmd.parse(["--standalone"]);
+
+  assertSpyCalls(optionActionSpy, 1);
+  assertSpyCalls(actionSpy, 0);
+  assertEquals(options, { standalone: true });
+});
+
+Deno.test("[command] should execute main action with standalone option", async () => {
+  const actionSpy = spy();
+
+  const cmd = new Command()
+    .throwErrors()
+    .option("--standalone", "description ...", {
+      standalone: true,
+    })
+    .action(actionSpy);
+
+  const { options } = await cmd.parse(["--standalone"]);
+
+  assertSpyCalls(actionSpy, 1);
+  assertEquals(options, { standalone: true });
+});
+
+Deno.test("[command] should throw an error if standalone option is combined with other options", async () => {
+  const actionSpy = spy();
+
+  const cmd = new Command()
+    .throwErrors()
+    .option("--standalone", "description ...", {
+      standalone: true,
+    })
+    .option("--foo", "description ...")
+    .action(actionSpy);
+
+  await assertRejects(
+    () =>
+      cmd.parse(
+        ["--standalone", "--foo"],
+      ),
+    Error,
+    'Option "--standalone" cannot be combined with other options.',
+  );
+});