[Foxy] Missing python packages pydot, psutil, PyQtGraph

[anion0278]

Describe the bug
Running rqt_graph, and rqt plugins requires manual installation of missing python packages such as pydot, psutil, PyQtGraph and graphviz.
Related to: #266, #267

To Reproduce

• When running the rqt_graph or starting Node Graph from rqt (Plugins-Introspection-Node graph) the following error appears:

ModuleNotFoundError: No module named 'pydot'

RosPluginProvider._parse_plugin_xml() plugin file "c:\opt\ros\foxy\x64\share\rqt_gui_cpp/plugin.xml" in package "rqt_gui_cpp" not found
RosPluginProvider._parse_plugin_xml() plugin file "c:\opt\ros\foxy\x64\share\rqt_gui_cpp/plugin.xml" in package "rqt_gui_cpp" not found
RosPluginProvider._parse_plugin_xml() plugin file "c:\opt\ros\foxy\x64\share\rqt_image_view/plugin.xml" in package "rqt_image_view" not found
RosPluginProvider._parse_plugin_xml() plugin file "c:\opt\ros\foxy\x64\share\rqt_image_view/plugin.xml" in package "rqt_image_view" not found
RosPluginProvider.load(rqt_graph/RosGraph) exception raised in __builtin__.__import__(rqt_graph.ros_graph, [RosGraph]):
Traceback (most recent call last):
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_gui\ros_plugin_provider.py", line 80, in load
    module = __builtin__.__import__(
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_graph\ros_graph.py", line 43, in <module>
    from qt_dotgraph.dot_to_qt import DotToQtGenerator
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_dotgraph\dot_to_qt.py", line 35, in <module>
    import pydot
ModuleNotFoundError: No module named 'pydot'

solved by pip install pydot.

• After another attempt to start:

FileNotFoundError: [WinError 2] "dot" not found in path.

Traceback (most recent call last):
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\plugin_handler_direct.py", line 121, in _restore_settings
    self._plugin.restore_settings(plugin_settings_plugin, instance_settings_plugin)
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_graph\ros_graph.py", line 265, in restore_settings
    self._refresh_rosgraph()
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_graph\ros_graph.py", line 293, in _refresh_rosgraph
    self._update_graph_view(self._generate_dotcode())
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_graph\ros_graph.py", line 312, in _generate_dotcode
    return self.dotcode_generator.generate_dotcode(
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_graph\dotcode.py", line 939, in generate_dotcode
    dotcode = dotcode_factory.create_dot(dotgraph)
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_dotgraph\pydotfactory.py", line 178, in create_dot
    dot = graph.create_dot()
  File "c:\opt\ros\foxy\x64\lib\site-packages\pydot.py", line 1733, in new_method
    return self.create(
  File "c:\opt\ros\foxy\x64\lib\site-packages\pydot.py", line 1933, in create
    raise OSError(*args)
FileNotFoundError: [WinError 2] "dot" not found in path.

solved by choco install graphviz and adding graphviz bin dir to PATH.

• Choosing rqt's Plugins - Introspection - Process monitor throws following error:

ModuleNotFoundError: No module named 'psutil'

PluginManager._load_plugin() could not load plugin "rqt_top/TOP":
Traceback (most recent call last):
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\plugin_handler.py", line 102, in load
    self._load()
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\plugin_handler_direct.py", line 55, in _load
    self._plugin = self._plugin_provider.load(self._instance_id.plugin_id, self._context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\composite_plugin_provider.py", line 72, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\composite_plugin_provider.py", line 72, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_gui_py\ros_py_plugin_provider.py", line 69, in load
    return super(RosPyPluginProvider, self).load(plugin_id, ros_plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\composite_plugin_provider.py", line 72, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_gui\ros_plugin_provider.py", line 91, in load
    raise e
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_gui\ros_plugin_provider.py", line 80, in load
    module = __builtin__.__import__(
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_top\top_plugin.py", line 38, in <module>
    from rqt_top.node_info import NodeInfo
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_top\node_info.py", line 28, in <module>
    import psutil
ModuleNotFoundError: No module named 'psutil'

solved by pip install psutil.

• Choosing rqt's Plugins - Visualization - Plot throws following error:

RuntimeError: No usable plot type found. Install at least one of: PyQtGraph, MatPlotLib (at least 1.4.0) or Python-Qwt5.

PluginManager._load_plugin() could not load plugin "rqt_plot/Plot":
Traceback (most recent call last):
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\plugin_handler.py", line 102, in load
    self._load()
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\plugin_handler_direct.py", line 55, in _load
    self._plugin = self._plugin_provider.load(self._instance_id.plugin_id, self._context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\composite_plugin_provider.py", line 72, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\composite_plugin_provider.py", line 72, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_gui_py\ros_py_plugin_provider.py", line 69, in load
    return super(RosPyPluginProvider, self).load(plugin_id, ros_plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\qt_gui\composite_plugin_provider.py", line 72, in load
    instance = plugin_provider.load(plugin_id, plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_gui\ros_plugin_provider.py", line 107, in load
    return class_ref(plugin_context)
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_plot\plot.py", line 57, in __init__
    self._data_plot = DataPlot(self._widget)
  File "c:\opt\ros\foxy\x64\lib\site-packages\rqt_plot\data_plot\__init__.py", line 159, in __init__
    raise RuntimeError(
RuntimeError: No usable plot type found. Install at least one of: PyQtGraph, MatPlotLib (at least 1.4.0) or Python-Qwt5.

solved by pip install pyqtgraph.

Expected behavior
I guess running rqt_graph and rqt plugins should not require manual installation of dependencies.
Maybe it can be added as part of patch.bat.

Environment information:

• OS version: Win10 22H2
• ROS2 Foxy 20211109.0.220118.0001 installed according to: https://ms-iot.github.io/ROSOnWindows/GettingStarted/SetupRos2.html
• Chocolatey Versions: choco list --local-only

Chocolatey v1.2.1
asio 1.12.1
chocolatey 1.2.1
chocolatey-compatibility.extension 1.0.0
chocolatey-core.extension 1.4.0
chocolatey-windowsupdate.extension 1.0.5
cmake 3.25.2
cmake.install 3.25.2
eigen 3.3.4
KB2919355 1.0.20160915
KB2919442 1.0.20160915
KB2999226 1.0.20170509
KB3033929 1.0.5
KB3035131 1.0.3
log4cxx 0.10.0
python 3.8.0
ros-foxy-desktop 20211109.0.220118.0001
tinyxml-usestl 2.6.2
tinyxml2 6.0.0
vcredist140 14.26.28720.3
vcredist2010 10.0.40219.32503
20 packages installed.