Add info on colcon.pkg - another way to specify module dependency

README.md

@@ -71,14 +71,14 @@ First make sure we have run the unit test already.
 colcon test
 ```
 
-### Test coverage report for "my_controller":
+### Test coverage report for `my_controller`:
 
 ``` bash
 ros2 run my_controller generate_coverage_report.bash
 open build/my_controller/test_coverage/index.html
 ```
 
-### Test coverage report for "my_model":
+### Test coverage report for `my_model`:
 
 ``` bash
 colcon build \

src/my_controller/README.md

@@ -1,4 +1,4 @@
-# my_controller
+# `my_controller`
 
 Here's a simple ROS2 package that demonstrates how integration test
 (aka level 2 unit test) can be done using GoogleTest.
@@ -14,11 +14,26 @@ For a more portable ROS2 integration test framework, consider using catch_ros2:
   https://github.com/ngmor/catch_ros2
 
 
-This ROS2 package depends on the "my_model" module.  This dependency
-is specified in the package's package.xml file:
+This ROS2 package depends on the `my_model` module.  This dependency
+is specified in the package's `package.xml` file:
 
 ```
   <depend>my_model</depend>
 ```
 
+Alternatively, we could also specify the dependency by creating a
+`colcon.pkg` file with the content listed below.  But since this is a
+ROS package, we must use `package.xml` instead of `colcon.pkg`.
+Otherwise the package will not show up in the list of ROS2 packages
+(ie., output of `ros2 pkg list`).
+
+```
+{
+    "name": "my_controller",
+    "type": "cmake",
+    "dependencies" : ["my_model"]
+}
+```
+
+
 

src/my_model/README.md

@@ -1,4 +1,4 @@
-# my_model
+# `my_model`
 
 ## Overview