[JIRA] (JENKINS-29922) Promote delegates of metasteps to top-level functions, deprecate $class

[k...@kohsuke.org (JIRA)]

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Kohsuke Kawaguchi commented on JENKINS-29922   Re: Promote delegates of metasteps to top-level functions, deprecate $class I spent some time with Jesse Glick today to figure out the direction of this change. User Experience The proposed syntax for this, assuming @Symbol annotations on relevant classes, is as follows: // symbols on MercurialSCM, Kallithea // as for steps, if only mandatory params, can elide param name // @DataBoundConstructor public Kallithea(String url) hg source: 'https://whatever/', clean: true, browser: kallithea('https://whatever/') kallithea is implemented by DSL.invokeMethod and returns a map-like object that just captures the arguments. We are not going to actually instantiate KallitheaBrowser at this point since disambiguating the symbol might require a context. hg is similarly implemented by DSL.invokeMethod, but Jenkins knows that there's a meta step that can handle SCM, so in this case it instantiates the whole tree (including nested kallithea) into SCM instance and use the meta step to execute it. Design Symbol plugin A class that represents a nested describable object (which was formally a map), say, UninstantiatedDescribable Workflow-Step-API A new boolean method on StepDescriptor to recognize meta steps Workflow-CPS-plugin DSL.invokeMethod recognizes symbol and instantiate UninstantiatedDescribable DSL.invokeMethod recognizes meta step and execute it on the spot Snippetizer to recognize UninstantiatedDescribable during formatting Add Comment   This message was sent by Atlassian JIRA (v7.1.7#71011-sha1:2526d7c) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.