Fix: need quote for help subcommand

src/cleo/application.py

@@ -428,6 +428,32 @@ def _run(self, io: IO) -> int:
             io.input.set_stream(stream)
             io.input.interactive(interactive)
 
+        if name == "help" and isinstance(io.input, ArgvInput):
+            # If the command is `help` we suppose
+            # that all without `-` is a command (possible namespaced)
+            argv = io.input._tokens[:]
+
+            if io.input.script_name is not None:
+                argv.insert(0, io.input.script_name)
+            else:
+                # Needs because `ApplicationTester` doesn't add script name
+                argv.insert(0, self.name)
+
+            # filter all words after `help` without `-`
+            start = argv.index(name)
+            words = list(filter(lambda arg: "-" not in arg, argv[start + 1 :]))
+
+            if words:
+                index = argv.index(words[0])
+                argv[index] = " ".join(argv[index:])
+                del argv[index + 1 :]
+
+            stream = io.input.stream
+            interactive = io.input.is_interactive()
+            io.set_input(ArgvInput(argv))
+            io.input.set_stream(stream)
+            io.input.interactive(interactive)
+
         exit_code = self._run_command(command, io)
         self._running_command = None
 

tests/fixtures/application_help_multiple_word.txt

@@ -0,0 +1,16 @@
+
+Description:
+  The foo bar command
+
+Usage:
+  foo bar [options]
+  afoobar
+
+Options:
+  -h, --help            Display help for the given command. When no command is given display help for the list command.
+  -q, --quiet           Do not output any message.
+  -V, --version         Display this application version.
+      --ansi            Force ANSI output.
+      --no-ansi         Disable ANSI output.
+  -n, --no-interaction  Do not ask any interactive question.
+  -v|vv|vvv, --verbose  Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug.

tests/test_application.py

@@ -118,6 +118,21 @@ def test_silent_help(app: Application) -> None:
     assert tester.io.fetch_output() == ""
 
 
+def test_help_multiple_word_command(app: Application) -> None:
+    app.catch_exceptions(False)
+
+    foo = FooCommand()
+    app.add(foo)
+
+    tester = ApplicationTester(app)
+    tester.execute("help foo bar")
+
+    assert (
+        tester.io.fetch_output()
+        == FIXTURES_PATH.joinpath("application_help_multiple_word.txt").read_text()
+    )
+
+
 def test_get_namespaces(app: Application) -> None:
     app.add(FooCommand())
     app.add(Foo1Command())