"non-repeatable" pipeline option

Hi,

Currently when a default step is defined the same commit pushed to different branches triggers parallel pipeline execution (attached a screenshot, notice the times and the same commit hash).

In many cases (such as testing and linting) this is just a waste of compute time. But, since it is true that some Pipelines steps are for sure needed to be executed, even multiple times, on the same commit, I would like to suggest a new pipeline feature:

It would be really nice if there will be a 'non-repeatable' option of some sort which will indicate the a certain step does not need to be re-executed on the same commit if it already have.

Maybe something like this:

pipelines:
default:

• step:
  options:
  
• non-repeatable <--- this is the suggestion
  caches:
  
• node
  script:
  
• yarn install
  
• npm test