AS: adding first phase of orientation

ros2_ws/install/examples_rclpy_guard_conditions/lib/examples_rclpy_guard_conditions/trigger_guard_condition

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+#!/usr/bin/python3
+# EASY-INSTALL-ENTRY-SCRIPT: 'examples-rclpy-guard-conditions==0.15.3','console_scripts','trigger_guard_condition'
+import re
+import sys
+
+# for compatibility with easy_install; see #2198
+__requires__ = 'examples-rclpy-guard-conditions==0.15.3'
+
+try:
+    from importlib.metadata import distribution
+except ImportError:
+    try:
+        from importlib_metadata import distribution
+    except ImportError:
+        from pkg_resources import load_entry_point
+
+
+def importlib_load_entry_point(spec, group, name):
+    dist_name, _, _ = spec.partition('==')
+    matches = (
+        entry_point
+        for entry_point in distribution(dist_name).entry_points
+        if entry_point.group == group and entry_point.name == name
+    )
+    return next(matches).load()
+
+
+globals().setdefault('load_entry_point', importlib_load_entry_point)
+
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(load_entry_point('examples-rclpy-guard-conditions==0.15.3', 'console_scripts', 'trigger_guard_condition')())

ros2_ws/install/examples_rclpy_guard_conditions/lib/python3.10/site-packages/examples_rclpy_guard_conditions-0.15.3-py3.10.egg-info/PKG-INFO

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+Metadata-Version: 2.1
+Name: examples-rclpy-guard-conditions
+Version: 0.15.3
+Summary: Examples of using guard conditions.
+Home-page: UNKNOWN
+Maintainer: Aditya Pande, Shane Loretz
+Maintainer-email: aditya.pande@openrobotics.org, shane@openrobotics.org
+License: Apache License, Version 2.0
+Keywords: ROS
+Platform: UNKNOWN
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: Apache Software License
+Classifier: Programming Language :: Python
+Classifier: Topic :: Software Development
+
+UNKNOWN
+

ros2_ws/install/examples_rclpy_guard_conditions/lib/python3.10/site-packages/examples_rclpy_guard_conditions-0.15.3-py3.10.egg-info/SOURCES.txt

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+package.xml
+setup.cfg
+setup.py
+../../../../build/examples_rclpy_guard_conditions/examples_rclpy_guard_conditions.egg-info/PKG-INFO
+../../../../build/examples_rclpy_guard_conditions/examples_rclpy_guard_conditions.egg-info/SOURCES.txt
+../../../../build/examples_rclpy_guard_conditions/examples_rclpy_guard_conditions.egg-info/dependency_links.txt
+../../../../build/examples_rclpy_guard_conditions/examples_rclpy_guard_conditions.egg-info/entry_points.txt
+../../../../build/examples_rclpy_guard_conditions/examples_rclpy_guard_conditions.egg-info/requires.txt
+../../../../build/examples_rclpy_guard_conditions/examples_rclpy_guard_conditions.egg-info/top_level.txt
+../../../../build/examples_rclpy_guard_conditions/examples_rclpy_guard_conditions.egg-info/zip-safe
+examples_rclpy_guard_conditions/__init__.py
+examples_rclpy_guard_conditions/trigger_guard_condition.py
+resource/examples_rclpy_guard_conditions
+test/test_copyright.py
+test/test_flake8.py
+test/test_pep257.py

ros2_ws/install/examples_rclpy_guard_conditions/lib/python3.10/site-packages/examples_rclpy_guard_conditions-0.15.3-py3.10.egg-info/dependency_links.txt

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+

ros2_ws/install/examples_rclpy_guard_conditions/lib/python3.10/site-packages/examples_rclpy_guard_conditions-0.15.3-py3.10.egg-info/entry_points.txt

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+[console_scripts]
+trigger_guard_condition = examples_rclpy_guard_conditions.trigger_guard_condition:main
+

ros2_ws/install/examples_rclpy_guard_conditions/lib/python3.10/site-packages/examples_rclpy_guard_conditions-0.15.3-py3.10.egg-info/requires.txt

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+setuptools

ros2_ws/install/examples_rclpy_guard_conditions/lib/python3.10/site-packages/examples_rclpy_guard_conditions-0.15.3-py3.10.egg-info/top_level.txt

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+examples_rclpy_guard_conditions

ros2_ws/install/examples_rclpy_guard_conditions/lib/python3.10/site-packages/examples_rclpy_guard_conditions-0.15.3-py3.10.egg-info/zip-safe

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+

ros2_ws/install/examples_rclpy_guard_conditions/lib/python3.10/site-packages/examples_rclpy_guard_conditions/trigger_guard_condition.py

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+# Copyright 2020 Open Source Robotics Foundation, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import rclpy
+
+
+def main(args=None):
+
+    rclpy.init(args=args)
+    node = rclpy.create_node('demo_guard_condition')
+    executor = rclpy.executors.SingleThreadedExecutor()
+    executor.add_node(node)
+
+    def guard_condition_callback():
+        rclpy.shutdown()
+        node.get_logger().info('guard callback called shutdown')
+
+    def timer_callback():
+        guard_condition.trigger()
+        node.get_logger().info('timer callback triggered guard condition')
+
+    node.create_timer(timer_period_sec=2, callback=timer_callback)
+    guard_condition = node.create_guard_condition(guard_condition_callback)
+
+    while rclpy.ok():
+        # First loop: `spin_once` waits for timer to be ready, then calls
+        #   the timer's callback, which triggers the guard condition.
+        # Second loop: The guard condition is ready so it's callback is
+        #   called. The callback calls shutdown, so the loop doesn't run
+        #   again and the program exits.
+        node.get_logger().info("waiting for 'spin_once' to finish...")
+        executor.spin_once()
+        node.get_logger().info("...'spin_once' finished!\n")
+
+
+if __name__ == '__main__':
+    main()