Dependency missed in README.md

[J-HowHuang]

Error encountered

Error message:

$ ros2 fgr load
2024-04-05 20:55:19.824849: I external/local_tsl/tsl/cuda/cudart_stub.cc:32] Could not find cuda drivers on your machine, GPU will not be used.
2024-04-05 20:55:19.832571: I external/local_tsl/tsl/cuda/cudart_stub.cc:32] Could not find cuda drivers on your machine, GPU will not be used.
2024-04-05 20:55:19.891309: I tensorflow/core/platform/cpu_feature_guard.cc:210] This TensorFlow binary is optimized to use available CPU instructions in performance-critical operations.
To enable the following instructions: AVX2 AVX512F FMA, in other operations, rebuild TensorFlow with the appropriate compiler flags.
2024-04-05 20:55:21.079621: W tensorflow/compiler/tf2tensorrt/utils/py_utils.cc:38] TF-TRT Warning: Could not find TensorRT
Failed to load entry point 'fgr': No module named 'cv_bridge'
Traceback (most recent call last):
  File "/opt/ros/humble/bin/ros2", line 33, in <module>
    sys.exit(load_entry_point('ros2cli==0.18.9', 'console_scripts', 'ros2')())
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2cli/cli.py", line 52, in main
    add_subparsers_on_demand(
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2cli/command/__init__.py", line 237, in add_subparsers_on_demand
    extension = command_extensions[name]
KeyError: 'fgr'

$ ros2 fgr load
2024-04-05 21:03:05.573081: I external/local_tsl/tsl/cuda/cudart_stub.cc:32] Could not find cuda drivers on your machine, GPU will not be used.
2024-04-05 21:03:05.585411: I external/local_tsl/tsl/cuda/cudart_stub.cc:32] Could not find cuda drivers on your machine, GPU will not be used.
2024-04-05 21:03:05.655669: I tensorflow/core/platform/cpu_feature_guard.cc:210] This TensorFlow binary is optimized to use available CPU instructions in performance-critical operations.
To enable the following instructions: AVX2 AVX512F FMA, in other operations, rebuild TensorFlow with the appropriate compiler flags.
2024-04-05 21:03:07.047345: W tensorflow/compiler/tf2tensorrt/utils/py_utils.cc:38] TF-TRT Warning: Could not find TensorRT
Failed to load entry point 'fgr': No module named 'cv2'
Traceback (most recent call last):
  File "/opt/ros/humble/bin/ros2", line 33, in <module>
    sys.exit(load_entry_point('ros2cli==0.18.9', 'console_scripts', 'ros2')())
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2cli/cli.py", line 52, in main
    add_subparsers_on_demand(
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2cli/command/__init__.py", line 237, in add_subparsers_on_demand
    extension = command_extensions[name]
KeyError: 'fgr'

$ ros2 fgr load
2024-04-05 21:06:03.893815: I external/local_tsl/tsl/cuda/cudart_stub.cc:32] Could not find cuda drivers on your machine, GPU will not be used.
2024-04-05 21:06:03.898654: I external/local_tsl/tsl/cuda/cudart_stub.cc:32] Could not find cuda drivers on your machine, GPU will not be used.
2024-04-05 21:06:04.001071: I tensorflow/core/platform/cpu_feature_guard.cc:210] This TensorFlow binary is optimized to use available CPU instructions in performance-critical operations.
To enable the following instructions: AVX2 AVX512F FMA, in other operations, rebuild TensorFlow with the appropriate compiler flags.
2024-04-05 21:06:05.598441: W tensorflow/compiler/tf2tensorrt/utils/py_utils.cc:38] TF-TRT Warning: Could not find TensorRT
Failed to load entry point 'fgr': libGL.so.1: cannot open shared object file: No such file or directory
Traceback (most recent call last):
  File "/opt/ros/humble/bin/ros2", line 33, in <module>
    sys.exit(load_entry_point('ros2cli==0.18.9', 'console_scripts', 'ros2')())
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2cli/cli.py", line 52, in main
    add_subparsers_on_demand(
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2cli/command/__init__.py", line 237, in add_subparsers_on_demand
    extension = command_extensions[name]
KeyError: 'fgr'

Reproduce:

Installed from scratch following instructions in readme.
Run:

ros2 fgr load

Solution

pip install cv_bridge opencv-python
sudo apt-get update && sudo apt-get install ffmpeg libsm6 libxext6  -y

Suggest change

In the readme#Installation, step 2 should add these dependencies:

apt-get install libgmp-dev sqlite3 ros-$ROS_DISTRO-tf-transformations ros-$ROS_DISTRO-ament-cmake-nose ros-$ROS_DISTRO-rosbag2 ffmpeg libsm6 libxext6 
pip install imageio tensorflow envlogger[tfds] numpy transforms3d rosbags cv_bridge opencv-python