A groovy script to decide the order of the combinations. There are several parameters available in the script

• combinations

This is a List of a String map of all the matrix combinations

For example, [{axis1: 'a', axis2: 'x'}, {axis1: 'b', axis2: 'y'...

• workspace

a string of the workspace

• jenkins which references Jenkins.instance
• execution which is the OneOffExecutor running the setup for the matrix job

A failure will stop the build on the next entry.

The return should be a TreeMap of combination lists. These will be executed in the natural order. Items in each section will be executed in parallel and the separate map entries in sequence. Any combination not in the map will not be executed.

This is passed into the script as result and needs to be returned from the script

• result TreeMap<String, List<Combination>>

If no script is specified, all combinations will be run in parallel in one go.