This example shows how to use named parameters in tasks.

This task builds the executable binary for the OS and CPU specified as parameters (of course not, it just displays the parameters). Both parameters have a default (linux operating system and amd64 processor)

echo "operating system: ${os:-linux}"
echo "processor: ${cpu:-amd64}"

The os and cpu parameters can be specified as variable assignments on the command line:

cdo build os=windows cpu=arm64