Roshlets are how you run rosh scripts as standalone ROS nodes.
Here is an example 'roshlet' that simply echoes one topic to another:
And here is the command to run it:
rosrun rosh rosh rosh/echolet.py
The main convenience of roshlets is that they eliminate much of the setup code that would normally be associated with writing a Python script. You are provided the same environment you get when you invoke the rosh interpreter.
If you use plugins, you specify those as a comma-separated list at the command-line:
rosrun rosh rosh rosh/echolet.py --plugins=rosh_common,rosh_geometry
The plugins will be automatically loaded so that you can use them immediately.
Hash Bang (#!)
Just like python scripts, rosh scripts should start with a hash-bang line. This enables making the script executable and running it without needing to pass it as an argument to rosh.
1 #!/usr/bin/env rosh
However, the hash-bang spec does not consistently allow for passing of arguments, which means that if you use hash-bang, you need to explicitly load plugins in your script. For example: