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[Newbie] Jenkins.instance vs Hudson.instance?

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Calvin-2

[Newbie] Jenkins.instance vs Hudson.instance?

I recently watched Sam's video guides on how to modify Jenkins settings via Groovy scripts.

I'm trying to modify the default shell programmatically and running into difficulties.

On a different Jenkins instance, I see that hudson.tasks.Shell.xml contains this config

<hudson.tasks.Shell_-DescriptorImpl>
<shell>bash</shell>
</hudson.tasks.Shell_-DescriptorImpl>

How do I access that field using Groovy?

I found hudson.tasks.Shell.DescriptorImpl.setShell(String shell) doc.

When I tried to access hudson.tasks via Hudson.instance.tasks.dump() I got this error

groovy.lang.MissingPropertyException: No such property: tasks for class: hudson.model.Hudson
Possible solutions: class

1. Jenkins.instance vs Hudson.instance? Which contains what and why?

2. How do I access the setShell() method?

Thanks for your help in advance

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Oleg Nenashev

Re: [Newbie] Jenkins.instance vs Hudson.instance?

Hi Calvin,

Jenkins.instance vs Hudson.instance? Which contains what and why?

There is no real difference. "Hudson.getInstance()" xists for compatibility reasons but returns the same object

Hudson.instance.tasks.dump()

As designed, there is no "tasks" in the Jenkins object: https://github.com/jenkinsci/jenkins/blob/master/core/src/main/java/jenkins/model/Jenkins.java . Likely you got confused by package names.

How do I access the setShell() method?

It should be something like that (untested):
Jenkins.instance.getDescriptor(hudson.tasks.Shell.class).setShell()

Hopefully it helps,
Oleg

On Sunday, April 15, 2018 at 10:32:45 PM UTC+2, Calvin wrote:

I recently watched Sam's <a href="https://www.youtube.com/watch?v=T1x2kCGRY1w" target="_blank" rel="nofollow" onmousedown="this.href='https://www.youtube.com/watch?v\x3dT1x2kCGRY1w';return true;" onclick="this.href='https://www.youtube.com/watch?v\x3dT1x2kCGRY1w';return true;">video guides on how to modify Jenkins settings via Groovy scripts.

I'm trying to modify the default shell programmatically and running into difficulties.
<a href="https://lh3.googleusercontent.com/-gHahg9EX2x4/WtOVApeTG7I/AAAAAAAA2jY/4boTZPBwJ_E83FqdzhYEPo89ZsG0SLfyQCLcBGAs/s1600/Screen%2BShot%2B2018-04-15%2Bat%2B11.07.49%2BAM.png" style="text-align:center;margin-left:1em;margin-right:1em" title="" target="_blank" rel="nofollow" onmousedown="this.href='https://lh3.googleusercontent.com/-gHahg9EX2x4/WtOVApeTG7I/AAAAAAAA2jY/4boTZPBwJ_E83FqdzhYEPo89ZsG0SLfyQCLcBGAs/s1600/Screen%2BShot%2B2018-04-15%2Bat%2B11.07.49%2BAM.png';return true;" onclick="this.href='https://lh3.googleusercontent.com/-gHahg9EX2x4/WtOVApeTG7I/AAAAAAAA2jY/4boTZPBwJ_E83FqdzhYEPo89ZsG0SLfyQCLcBGAs/s1600/Screen%2BShot%2B2018-04-15%2Bat%2B11.07.49%2BAM.png';return true;">

On a different Jenkins instance, I see that hudson.tasks.Shell.xml contains this config
<hudson.tasks.Shell_-DescriptorImpl>
<shell>bash</shell>
</hudson.tasks.Shell_-DescriptorImpl>

How do I access that field using Groovy?

I found hudson.tasks.Shell.DescriptorImpl.setShell(String shell) <a href="http://javadoc.jenkins-ci.org/hudson/tasks/Shell.DescriptorImpl.html" target="_blank" rel="nofollow" onmousedown="this.href='http://www.google.com/url?q\x3dhttp%3A%2F%2Fjavadoc.jenkins-ci.org%2Fhudson%2Ftasks%2FShell.DescriptorImpl.html\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNFwduw7ZmJb20m8VWeSiB0W-qntLw';return true;" onclick="this.href='http://www.google.com/url?q\x3dhttp%3A%2F%2Fjavadoc.jenkins-ci.org%2Fhudson%2Ftasks%2FShell.DescriptorImpl.html\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNFwduw7ZmJb20m8VWeSiB0W-qntLw';return true;">doc.
When I tried to access hudson.tasks via Hudson.instance.tasks.dump() I got this error
groovy.lang.MissingPropertyException: No such property: tasks for class: hudson.model.Hudson
Possible solutions: class

1. Jenkins.instance vs Hudson.instance? Which contains what and why?
2. How do I access the setShell() method?

Thanks for your help in advance

--
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To unsubscribe from this group and stop receiving emails from it, send an email to [hidden email].
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For more options, visit https://groups.google.com/d/optout.

Calvin-2

Re: [Newbie] Jenkins.instance vs Hudson.instance?

Thank you Oleg. I'll dig more into Descriptor.java to get a better understanding.

On Monday, April 16, 2018 at 2:11:23 AM UTC-7, Oleg Nenashev wrote:

Hi Calvin,

Jenkins.instance vs Hudson.instance? Which contains what and why?
There is no real difference. "Hudson.getInstance()" xists for compatibility reasons but returns the same object
Hudson.instance.tasks.dump()

As designed, there is no "tasks" in the Jenkins object: <a href="https://github.com/jenkinsci/jenkins/blob/master/core/src/main/java/jenkins/model/Jenkins.java" target="_blank" rel="nofollow" onmousedown="this.href='https://www.google.com/url?q\x3dhttps%3A%2F%2Fgithub.com%2Fjenkinsci%2Fjenkins%2Fblob%2Fmaster%2Fcore%2Fsrc%2Fmain%2Fjava%2Fjenkins%2Fmodel%2FJenkins.java\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNEf0WhO69ZusSs0Ug11My1NXVKvtA';return true;" onclick="this.href='https://www.google.com/url?q\x3dhttps%3A%2F%2Fgithub.com%2Fjenkinsci%2Fjenkins%2Fblob%2Fmaster%2Fcore%2Fsrc%2Fmain%2Fjava%2Fjenkins%2Fmodel%2FJenkins.java\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNEf0WhO69ZusSs0Ug11My1NXVKvtA';return true;">https://github.com/jenkinsci/jenkins/blob/master/core/src/main/java/jenkins/model/Jenkins.java . Likely you got confused by package names.

How do I access the setShell() method?

It should be something like that (untested):
Jenkins.instance.getDescriptor(hudson.tasks.Shell.class).setShell()

Hopefully it helps,
Oleg

On Sunday, April 15, 2018 at 10:32:45 PM UTC+2, Calvin wrote:
I recently watched Sam's <a href="https://www.youtube.com/watch?v=T1x2kCGRY1w" rel="nofollow" target="_blank" onmousedown="this.href='https://www.youtube.com/watch?v\x3dT1x2kCGRY1w';return true;" onclick="this.href='https://www.youtube.com/watch?v\x3dT1x2kCGRY1w';return true;">video guides on how to modify Jenkins settings via Groovy scripts.

I'm trying to modify the default shell programmatically and running into difficulties.
<a href="https://lh3.googleusercontent.com/-gHahg9EX2x4/WtOVApeTG7I/AAAAAAAA2jY/4boTZPBwJ_E83FqdzhYEPo89ZsG0SLfyQCLcBGAs/s1600/Screen%2BShot%2B2018-04-15%2Bat%2B11.07.49%2BAM.png" style="text-align:center;margin-left:1em;margin-right:1em" title="" rel="nofollow" target="_blank" onmousedown="this.href='https://lh3.googleusercontent.com/-gHahg9EX2x4/WtOVApeTG7I/AAAAAAAA2jY/4boTZPBwJ_E83FqdzhYEPo89ZsG0SLfyQCLcBGAs/s1600/Screen%2BShot%2B2018-04-15%2Bat%2B11.07.49%2BAM.png';return true;" onclick="this.href='https://lh3.googleusercontent.com/-gHahg9EX2x4/WtOVApeTG7I/AAAAAAAA2jY/4boTZPBwJ_E83FqdzhYEPo89ZsG0SLfyQCLcBGAs/s1600/Screen%2BShot%2B2018-04-15%2Bat%2B11.07.49%2BAM.png';return true;">

On a different Jenkins instance, I see that hudson.tasks.Shell.xml contains this config
<hudson.tasks.Shell_-DescriptorImpl>
<shell>bash</shell>
</hudson.tasks.Shell_-DescriptorImpl>

How do I access that field using Groovy?

I found hudson.tasks.Shell.DescriptorImpl.setShell(String shell) <a href="http://javadoc.jenkins-ci.org/hudson/tasks/Shell.DescriptorImpl.html" rel="nofollow" target="_blank" onmousedown="this.href='http://www.google.com/url?q\x3dhttp%3A%2F%2Fjavadoc.jenkins-ci.org%2Fhudson%2Ftasks%2FShell.DescriptorImpl.html\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNFwduw7ZmJb20m8VWeSiB0W-qntLw';return true;" onclick="this.href='http://www.google.com/url?q\x3dhttp%3A%2F%2Fjavadoc.jenkins-ci.org%2Fhudson%2Ftasks%2FShell.DescriptorImpl.html\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNFwduw7ZmJb20m8VWeSiB0W-qntLw';return true;">doc.
When I tried to access hudson.tasks via Hudson.instance.tasks.dump() I got this error
groovy.lang.MissingPropertyException: No such property: tasks for class: hudson.model.Hudson
Possible solutions: class

1. Jenkins.instance vs Hudson.instance? Which contains what and why?
2. How do I access the setShell() method?

Thanks for your help in advance

--
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 [hidden email].
To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-dev/61b81205-cee0-456c-bd9d-7f19e921a6b0%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.