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  1. Jenkins
  2. JENKINS-61101

Mutually exclusive stages in declarative pipeline

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      There have been a few cases where I've needed to define a set of mutually exclusive stages of which only one should execute. Right now this can be accomplished with a parallel block containing stages with inter-related when conditions, but this is annoying to manage. I propose adding a new switch block to stage.

       

      stage ("Do It") {
          switch {
              stage("Stage A") {
                  when { expression { return conditionA } }
                  steps { ... }
              }
              stage("Stage B") {
                   when { expression { return conditionB } }
                   steps { ... }
              }
              stage("Stage C") {
                  steps { ... }
              }
          }
      }
      

      This means "If condition A, do Stage A. Else if condition B, do Stage B. Else, do Stage C." switch would be at the same level as stagesparallel, and matrix today. This allows Blue Ocean to clearly display the mutually exclusive stages (probably in a vertical arrangement, like it does for parallel).

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          bitwiseman Liam Newman added a comment -

          I love this syntax. Very elegant.

          I'm not sure exactly how it should be implemented yet.

          I agree it would be nice to have blue ocean display these vertically, but that would mean implementing/exposing the switch as though it were a parallel with would limit where it could be used - for instance then we couldn't have a switch inside a switch.

          bitwiseman Liam Newman added a comment - I love this syntax. Very elegant. I'm not sure exactly how it should be implemented yet. I agree it would be nice to have blue ocean display these vertically, but that would mean implementing/exposing the switch as though it were a parallel with would limit where it could be used - for instance then we couldn't have a switch inside a switch.

          People

            bitwiseman Liam Newman
            rittneje Jesse Rittner
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