Add completion spec: ROS 2 (ros2)

[lucieleblanc]

Adds a completion spec for the ros2 CLI command (ROS 2 command line interface).

What's included

JSON spec (command-signatures/json/ros2.json):

• All core subcommands: action, bag, component, daemon, doctor, extension_points, extensions, interface, launch, lifecycle, multicast, node, param, pkg, run, security, service, test, topic, wtf
• Full option coverage for each subcommand
• Static suggestions for enum-valued options (log levels, storage IDs, QoS settings, lifecycle transitions, build types)

Generators (command-signatures/src/generators/ros2.rs):

• packages — lists installed ROS 2 packages via ros2 pkg list
• executables — token-based: reads the package name from tokens and runs ros2 pkg executables <pkg>
• topics — lists active topics via ros2 topic list
• nodes — lists running nodes via ros2 node list
• services — lists running services via ros2 service list
• actions — lists running actions via ros2 action list
• interfaces — lists all interface types via ros2 interface list

The dynamic generators (topics, nodes, services, actions) require a running ROS 2 system but degrade gracefully to empty results when none is available.

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Conversation: https://staging.warp.dev/conversation/3716f6a7-7335-4f2d-93e2-8f4972406b10

[lucieleblanc]

Generator Validation Results

All 7 ros2 generators were tested against a local Warp build with ROS 2 Jazzy installed on Ubuntu 24.04. Demo nodes (talker, listener, add_two_ints_server, fibonacci_action_server) were running to provide live ROS 2 data.

Test Results

Generator	Command Tested	Result	Sample Completions
packages	ros2 pkg prefix	✅ Working	action_msgs, action_tutorials_cpp, ament_cmake, ... (scrollable list of ~199 packages)
topics	ros2 topic echo	✅ Working	/chatter, /parameter_events, /rosout
nodes	ros2 node info	✅ Working	/add_two_ints_server, /fibonacci_action_server, /listener, /talker
services	ros2 service info	✅ Working	/add_two_ints, /add_two_ints_server/describe_parameters, /listener/set_parameters, ... (scrollable list)
actions	ros2 action info	✅ Working	/fibonacci
interfaces	ros2 interface show	✅ Working	action_msgs/msg/GoalInfo, action_msgs/msg/GoalStatus, action_tutorials_interfaces/action/Fibonacci, ... (scrollable list)
executables	ros2 run demo_nodes_cpp	✅ Working	add_two_ints_client, talker, listener, parameter_blackboard, ... (scrollable list of ~30 executables)

Notes

• Static completions (subcommands, flags/options) from the JSON spec also work correctly
• Generators execute ros2 CLI commands as subprocesses; the ROS 2 environment (PYTHONPATH, AMENT_PREFIX_PATH, etc.) must be available in the Warp process's environment for generators to work
• The executables generator correctly uses context (the preceding package name token) to scope executables to the specified package

[lucieleblanc]

Uploading screenshots here since they didn't make it in:

packages:

topics:

nodes:

services:

actions:

interfaces:

executables: