Sometimes, we want to create multiple jobs that use the same Jenkinsfile instead of a single one. This could happen for example because we want to maintain logs divided based on parameters, instead of having a single job on which look for the right log.
However, in this case, we can't use the parameter definition in the Jenkinsfile, because whatever default value we would define on the job instance would be overwritten by the following execution with whatever is defined in the Jenkinsfile (and this is also happening if we don't define a default value).
So, in this situation, the only way we figure out is to remove the parameter definition in the Jenkinsfile and define the parameters directly on the jobs, which is kind of not optimal.
I mean, I agree that this is the right behavior in most of the cases, as you don't want your parameter to be out of synch and not versioned, but is there a way to specify to Jenkins to skip the parameter reconfiguration or to override the default parameter written in the Jenkinsfile? Something that can be activated/deactivated job by job.
Had this problem myself, we solved it like this:
string(name: 'parameterName', defaultValue: params.parameterName ?:'your default value')
Now the default values defined through Jenkins job configuration will not be overridden.
Related
In Jenkins declarative pipeline we can define build parameters like
pipeline {
…
parameters {
string(name: 'PARAMETER', defaultValue: 'INITIAL_DEFAULT')
choice(name: 'CHOICE', choices: ['THIS', 'THAT'])
}
…
}
However the parameter definitions of the job are only updated when the job runs after the build parameters dialog was already shown. That is, when I change the INITIAL_DEFAULT to something else, the next build will still default to INITIAL_DEFAULT and only the one after that will use the new value.
The same problem is with the choices, and there it is even more serious, because string default can be overwritten easily when starting the build, but if the new option isn't there, it cannot be selected at all.
So is there a way to define functions or expressions that will be executed before the parameter dialog to calculate current values (from files, variable in global settings or any other suitable external configuration)?
I remember using some plugins for this in the past with free-style jobs, but searching the plugin repository I can't find any that would mention how to use it with pipelines.
I don't care too much that the same problem applies to adding and removing parameters, because that occurs rarely. But we have some parameters where the default changes often and we need the next nightly to pick up the updated value.
It turns out the extended-choice-parameter does work with pipeline, and the configurations can be generated by the directive generator. It looks something like
extendedChoice(
name: 'PARAMETER',
type: 'PT_TEXTBOX',
defaultPropertyFile: '/var/lib/jenkins/something.properties',
defaultPropertyKey: 'parameter'
)
(there are many more options available in the generator)
Groovy script to get global environment variables can be had from this other answer.
I am having troubles to force Jenkins job to always run with default parameter. Does anyone know the possible plugin to help with that case? Right now I am using extended parameter choice, but still there is no option to just run the job with default value without asking user for parameter.
Solution 1
Currently there is not a straight forward solution to run a parameterized job with default parameter using a plugin. However there is a workaround to accomplish that using the EnvInject Plugin.
As #General_Code noted:
Just add the build step, set the variable like: var1=value and then
use it using ${var1}
Solution 2
As #RejeeshChandran noted:
a more robust solution is the Parameterized Build Plugin which provides the functionality of defaults values for the parameters.
Note
Note that Parameter Defaults Options is a plugin under development which will solve exactly this request. When it is released, you will be able to set it up so your parameter will get a default value when you run it manually.
you can use this plugin Parameterized Scheduler
allow you to write a cron expression with the parameters inside like this
H(0-29)/10 * * * * % name=value; othername=othervalue
Documentations
Use This build is parameterized option in Jenkins configuration. Here you can add default values to the parameters. It will run with default value if the user doesn't change it. It is good to have configurable parameter before running the job.
For configuration details see https://wiki.jenkins-ci.org/display/JENKINS/Parameterized+Build. You can have multiple parameters.
Go to your jenkins job -> Configure -> General Tab
Add all options in "Description" but the default option in "Default Value"
enter image description here
I've got a Jenkins build with a choice box for build prefixes by release. It helps trigger a job based off the value of whatever specific build the person wanted.
I wanted to take the value of that choice box and transform the variable into the correct prefix based off the naming conventions typically used on this server for triggering the job based off its name.
So let's say I've got build prefix choices specifically for,
ReleaseOne
ReleaseTwo
none
For none, meaning the parameters used won't try to access or set any specific release-based info by triggering the non-release-specified build.
I wanted to take the value of Release_Prefix and transform it, if needed, for the job that I trigger later. I was hoping to accomplish this with a dynamic parameter or similar mechanism. I'm not sure if my script is bugged, or something fundamental is not working to my intent. This might be the case, based off some alluded feedback from a similar question.
Can I do something like this snippet below? If not with Dynamic Parameter plugin + GroovyScript, what would you suggest? This currently seems to return nothing, regardless of my choice.
Formatted_Prefix parameter, Dynamic Parameter
switch(binding.getVariables().get("Release_Prefix"))
{
case "none":
return "";
case "ReleaseOne":
return "ReleaseOne_";
case "ReleaseTwo":
return "ReleaseTwo_";
default:
def prefix = binding.getVariables().get("Release_Prefix")
return "$prefix_";
}
There's multiple ways I can overcome this, but if I can do it at the initial parameter stage, that would be best for me.
You can use EnvInject Plugin for this.
check the checkbox Prepare an environment for the run and
write your script inside Evaluated Groovy script text box
def prefix1 = Release_Prefix + "mydata"
return[prefix:prefix1]
I want to add a conditional parameter to jenkins job. In other words, I want to add a boolean parameter when checked, another string parameter appears to the user when they build the job. If not checked the string parameter should not appear as a parameter when the user builds the job (Kind of a similar behaviour to the conditional steps of jenkins but on parameters.). Is their a plugin for that?
In the image below, if repo_update is not checked: Clean and Changesets should not be present to the user if they are building the job.
You might want to look at the Multi job plugin
Make the parent and child two separate jobs. This to me makes more sense logically.
In the build part, run the parent job first.
Based on a condition, the child job can run.
You can add the child params in the child job only, so people who configure the parent job will never see the child params
This to me feels like a cleaner implementation.
I have a jenkins job (jobA) which calls another one (jobB).
I have a string which is generated in a batch file called by jobA which needs to be passed into jobB.
How can I get that string out of jobA and into jobB?
Might it be possible to, say, set an environment variable to that string, somehow turn it into a jenkins parameter, and then pass that parameter into jobB?
Currently, my only other idea is to write the string out to a file in jobA, save that file as an artifact, pass that artifact into jobB, and then have jobB read that file. That seems a really kludgey way to do it, though.
It seems that there must be a better way.
One option is to use Jenkins Parameterized Trigger Plugin.
Then, you can for example set jobB's parameters based on a properties file generated by jobA.