Hi. We're in the process of creating a new <icon> in the hope of allowing more control over icons in the UI [1]. As part of that, we want to allow plugins that adopt this new tag to remain backward compatible with older versions of Jenkins.
Up to now, the convention seems to have been that all core jelly taglibs (forms etc) live in Jenkins core and plugins get them from there: <https://lh5.googleusercontent.com/-bnwMqmtmK4I/U7HdvP9_azI/AAAAAAAABIg/9ZtjRLr_kQU/s1600/Screenshot+2014-06-30+22.54.39.png> Of course, this means that a given plugin has a dependency on a particular version of Jenkins on which it is installed. For that reason, we talked [1] about creating "shim" plugin. This would be a plugin that defines an intermediate icon tag (maybe call it <icon-shim>) that has Jenkins version switching code inside it i.e. if (jenkinsVersion >= 1.571) { // use new <l:icon> tag ... } else { // use display icon in traditional way (as <img>) } <https://lh3.googleusercontent.com/-po0x1R8HUj0/U7HioP8dtXI/AAAAAAAABIw/wBNp2arHqD8/s1600/Screenshot+2014-06-30+23.09.04.png> This all seemed a bit clumsy/ugly/messy to me, requiring multiple icon related tags... plugin release management for the shim plugin etc etc. So I decided to try creating a simple <icon> taglib jar (i.e. not putting the <icon> taglib in Jenkins Core). Then, Jenkins Core and whatever plugins wish to upgrade (to using the new <icon> tag) simple add this new taglib as a dependency, independently of each other. So long as the <icon> taglib does not use anything in a newer release of Jenkins, then the plugin should work all the way back down the Jenkins releases: <https://lh6.googleusercontent.com/-OMgCDihqezQ/U7HjQ9oJoUI/AAAAAAAABI4/pVCDvV2M2TI/s1600/Screenshot+2014-06-30+23.09.17.png> I have some code here [2]. It works fine from a Jenkins Core perspective. I'm going to change the Credentials plugin now and test that it works on new and old versions of Jenkins. I'm fairly confident it will. The icon taglib is currently in an "icon" module of the root the project. I know that's probably not a good long-term location - if the idea sticks, we can easily move it to a new home. So.... what's "wrong" with doing it this way Vs using a "shim" plugin ? :) [1] https://groups.google.com/forum/?hl=en#!topic/jenkinsci-dev/GOiQdvctBB0 [2] https://github.com/tfennelly/jenkins/compare/icon-tag -- You received this message because you are subscribed to the Google Groups "Jenkins Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
