Jenkins when expression

Like so:. If we want to say it is dependent in someway then we need to make that relationship explicit. When stage "Full Build" is not what? Not skipped, not run, not stable? That isn't clear. Right now the use case described is easily done as shown. To me that is much more clear than the alternative. We can explore having some stage conditions but they need to be clear. Patrick Wolf I'm open to discussion of how it should look, but I think we need some form of this.

Also, stages run in serial and failure in a previous stage would generally stop the pipeline right? Oh, and the conditional syntax is stageHasRun "some-stage" - just stage caused things to blow up at parse-time due to stage being overloaded twice already. Since stages don't yet have their own statuses in a real way, we don't have any way to compare against stage status. Has there been any progress on this? I find myself in need of a solution to know if an earlier stage has been built.

I found myself needing something similar - a set of mutually exclusive stages of which only one should execute. I would actually prefer something like this:.

jenkins when expression

This means "If condition A, do Stage A. Else if condition B, do Stage B. Else, do Stage C. This allows Blue Ocean to clearly display the mutually exclusive stages probably in a vertical arrangement, like it does for parallel. Jesse Rittner Wow. Yeah, I like that idea. It is a separate idea from this, though I see the relation. Please file an issue for it. Brian Nacey No there hasn't been more progress on this issue.

It stalled out. Restarting it would require some effort.The following plugin provides functionality available through Pipeline-compatible steps.

Read more about how to integrate steps into your Pipeline in the Steps section of the Pipeline Syntax page. For a list of other such plugins, see the Pipeline Steps Reference page. View this plugin on the Plugins site. This step pauses Pipeline execution and allows the user to interact and control the flow of the build.

Jenkins: Testing conditional logic for stages in your pipeline

Only a basic "process" or "abort" option is provided in the stage view. You can optionally request information back, hence the name of the step. The parameter entry screen can be accessed via a link at the bottom of the build console log or via link in the sidebar for a build. If you click "Proceed" the build will proceed to the next step, if you click "Abort" the build will be aborted.

Every input step has an unique ID. It is used in the generated URL to proceed or abort. Request that the submitter specify one or more parameter values when approving. If just one parameter is listed, its value will become the value of the input step. If multiple parameters are listed, the return value will be a map keyed by the parameter names. If parameters are not requested, the step returns nothing if approved. On the parameter entry screen you are able to enter values for parameters that are defined in this field.

Display is the text the user will see when inserting tokens. Use this field to control how the text will be shown to the user. If the data provider returns a simple list of strings, each value can be referred by the variable 'value' in javascript expressions.

Value is the text the job will receive in the parameter. Use this field to control how the text will provided to the job. Defines a parameter where users can pick an active release from a BuildMaster application.

The following environment variables will be injected into the build job:. When used within pipeline script the applicationId parameter can contain either the id or name of a BuildMaster application. Triggering a build from an external source As the two fields are still presented to Jenkins as a single parameter, a slightly different approach is required to to pass in both the application id and release number from other jobs or via a build api request.

This is supported by separating the two values using the pipe character ' '. The applicationId is optional, can contain either an Id or applicaton name, and is only supported if this field is checked. For data providers that returns JSON arrays, there are display and values.

Value is the value that will be given to the build. When used, this parameter will present at build-time a choice to select a Git tag or revision number which set a parameter for parametrized build.

Often the parameter defined in the "Name" field is used to specify the branch of the git checkout. The mode that you select here will influence the final value of the parameter, when you build the child:.

Do note that, if trimming is selected, this has an effect on both the default value used for automatically started builds, as well as user-initiated builds where the user had a chance to alter the parameter value. Optionally, specify a comma-delimited list of fields to use instead of the issue summary as the title in the dropdown. Fields will be concatenated with spaces. Specify a regular expression which release names have to match to be listed.

Leave this blank to match all issues. When used, this parameter will display a field at build-time so that user is able to select a git branch or tag as a parameter for parametrized build.

Jenkins stage skip - Conditional Stage Execution - Skipped Stages in Jenkins Scripted Pipeline

Note that this plugin is specifically designed for pipeline jobs that do not configure SCM but still want to see remote repository branches or tags before build begins. The plugin is highly motivated by Git Parameter Plugin.Some steps in your development or release process can only be executed when the conditions are right.

An example of this is that releases to Production can only be done from the production branch, or that deployments to Acceptance can only occur when they are approved by a specific user. This is where conditions shine, and they are implemented in Jenkins Pipelines as a when block.

Tests help with both. Again, we are working with the Pipeline from the previous posts, but this time we have to alter it slightly to use the when directive. This is what we have now:. Jenkins should also check this before a suitable agent is found, to avoid unnecessary usage of agents and slower builds.

Please also note that this condition could have been written in plain Groovy as:. The when directive allows the Pipeline to determine whether the stage should be executed depending on the given condition.

With these boolean logic operators, we would be able to create very intricate condition statements if required. However, it can be considered best practice to at least keep the conditions readable and concise. I would recommend using one or two conditions at best, to keep the pipeline easily understandable for all users. The test frameworks we have selected Jenkins PipelineUnitSpock and pipelineUnit support the majority of these conditions, but it is still incomplete.

It will, however, correctly interpret the boolean conditions. We are testing a condition which checks for the name of the branch the build is running on. A new scenario where we actively set the branch to be something different would look like this:. After this, it checks for a call to Maven but does not expect a call to publish the artefact in Nexus as it would be skipped due to the conditional. The pipeline should complete successfully, as the condition merely instructs Jenkins to skip the stage but not fail on this.

Great, this is what we need! The test frameworks do not set the value beforehand, so the author of the test is responsible for a correct value. These snippets would both check whether the build runs on a tag, and the second snippet even checks if the tag is according to the glob-style matcher it provides.

Functionally, it would evaluate to true and then run the correct stage when the build is running on a tag for a release.With the upgrade to 1. After saving the view does not show any jobs, and when going back in to edit the view again the regular expression field contains the word "on". No exceptions or errors in log files that I can see. A workaround at this moment is to change the config. I am changing the component on this, because this is not part of the View Job Filters plugin, it is part of the Jenkins core.

If this bug does not get resolved, you might also consider using the View Job Filters plugin, which allows you to filter jobs based on many more things than just the job name. An upgrade to 1. Unsure if 1. Issues Reports Components Test sessions. Log In. XML Word Printable. Type: Bug. Status: Closed View Workflow. Priority: Blocker. Resolution: Fixed. Labels: jenkins. Environment: Jenkins 1. Similar Issues:. Hide Permalink.

Bruce Coveny added a comment - Show Bruce Coveny added a comment - A workaround at this moment is to change the config. Jacob Robertson added a comment - Show Jacob Robertson added a comment - I am changing the component on this, because this is not part of the View Job Filters plugin, it is part of the Jenkins core. Show Bruce Coveny added a comment - An upgrade to 1.

Show Bruce Coveny added a comment - This appears to be fixed in version 1.

Jenkins Declarative Pipeline Tutorial

Created: Updated: Resolved: This section builds on the information introduced in Getting started with Pipeline and should be treated solely as a reference. For more information on how to use Pipeline syntax in practical examples, refer to the Using a Jenkinsfile section of this chapter. As of version 2. For the pros and cons of each, see the Syntax Comparison. As discussed at the start of this chapterthe most fundamental part of a Pipeline is the "step".

Basically, steps tell Jenkins what to do and serve as the basic building block for both Declarative and Scripted Pipeline syntax. For an overview of available steps, please refer to the Pipeline Steps reference which contains a comprehensive list of steps built into Pipeline as well as steps provided by plugins. Declarative Pipeline is a relatively recent addition to Jenkins Pipeline [ 1 ] which presents a more simplified and opinionated syntax on top of the Pipeline sub-systems.

All valid Declarative Pipelines must be enclosed within a pipeline block, for example:. Blocks must only consist of SectionsDirectivesStepsor assignment statements. A property reference statement is treated as a no-argument method invocation. So, for example, input is treated as input. You can use the Declarative Directive Generator to help you get started with configuring the directives and sections in your Declarative Pipeline.

Sections in Declarative Pipeline typically contain one or more Directives or Steps. The agent section specifies where the entire Pipeline, or a specific stage, will execute in the Jenkins environment depending on where the agent section is placed. The section must be defined at the top-level inside the pipeline block, but stage-level usage is optional. There are some nuances when adding an agent to the top level or a stage level, and this when the options directive is applied.

In agents declared at the outermost level of the Pipeline, the options are invoked after entering the agent. As an example, when using timeout it will be only applied to the execution within the agent. In agents declared within a stage, the options are invoked before entering the agent and before checking any when conditions.

In this case, when using timeoutit is applied before the agent is allocated. The timeout will include the agent provisioning time. Because the timeout includes the agent provisioning time, the Pipeline may fail in cases where agent allocation is delayed. When using timeoutit will applied before the agent therefore the timeout will account for the provisioning time.

This may cause the pipeline to timeout if it takes too long to allocate an agent.

jenkins when expression

In order to support the wide variety of use-cases Pipeline authors may have, the agent section supports a few different types of parameters. These parameters can be applied at the top-level of the pipeline block, or within each stage directive. When applied at the top-level of the pipeline block no global agent will be allocated for the entire Pipeline run and each stage section will need to contain its own agent section. For example: agent none. Execute the Pipeline, or stage, on an agent available in the Jenkins environment with the provided label.There are number of plugins, some that have been around since the very beginning, that enable users to create "pipelines" in Jenkins.

For example, basic job chaining worked well in many cases, and the Parameterized Trigger plugin made chaining more flexible. However, creating chained jobs with conditional behavior was still one of the harder things to do in Jenkins. The Conditional BuildStep plugin is a powerful tool that has allowed Jenkins users to write Jenkins jobs with complex conditional logic.

Unlike Freestyle jobs, implementing conditional operations in Jenkins Pipeline is trivial, but matching the behavior of complex conditional build steps will require a bit more care. It does this by:. Adding two types of Conditional BuildStep "Single" and "Multiple" - these build steps contain one or more other build steps to be run when the configured condition is met.

Adding a set of Condition operations - these control whether the Conditional BuildStep execute the contained step s. This is a simple example but the conditional step can contain any regular build step. When combined with other plugins, it can control whether to send notifications, gather data from other sources, wait for user feedback, or call other projects.

The Conditional BuildStep plugin does a great job of leveraging strengths of the Jenkins web UI, Freestyle jobs, and UI-based programming, but it is also hampered by their limitations. The Jenkins web UI can be clunky and confusing at times. Like the steps in any Freestyle job, these conditional steps are only stored and viewable in Jenkins.

Like any number of UI-based programming tools, it has to make trade-offs between clarity and flexibility: more options or clearer presentation. Jenkins Pipeline, on the other hand, enables users to implement their pipeline as code. Pipeline code can be written directly in the Jenkins Web UI or in any text editor.

It is a full-featured programming language, which gives users access to much broader set of conditional statements without the restrictions of UI-based programming. Some might argue that the Pipeline code is a bit harder to understand on first reading.

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Others would say the UI is just as confusing if not more so. Either way, the Pipeline representation is considerably more compact than the Jenkins UI presentation. And we can easily put this Pipeline in a Jenkinsfile to be code-reviewed, checked-in, and versioned along with the rest of our code. The previous example showed the "Strings match" condition and its Pipeline equivalent.

jenkins when expression

Since it works with string values from tokens, the Conditional BuildStep plugin offers a number of ways to indicate true or false. Pipeline can duplicate these, but depending on the scenario we might consider whether a simpler expression would suffice. This condition wraps other conditions. It takes their results as inputs and performs a logical "or" of the results. Tokens can be considerably more work than conditions. There are more of them and they cover a much broader range of behaviors.

The previous example showed one of the simpler cases, accessing a build parameter, where the token has a direct equivalent in Pipeline. So, determining how to migrate tokens needs to be done on case-by-case basis. Expands to the contents of a file.Jenkins Pipeline is the workflow that implements Continuous Delivery pipeline with the Jenkins features, tools and plugins. There are two different ways to create Jenkins pipeline.

One is Declarative Pipeline, and another is Scripted Pipeline. In this article, we will see about how to create Jenkins Declarative pipeline. This tutorial will give you insight on the structure and directives of declarative pipeline and syntax. Basically, this pipeline label opens the block where following directives and blocks are present. Let us see all these directives and blocks one by one in this Jenkins Declarative Pipeline Tutorial.

Pipeline is a block where all other blocks and directives are declared. This is the starting of the Declarative pipeline. So, Pipeline label will be declared as follows. Jenkins is popular for one of its best feature called distributed build process to the agent nodes. Jenkins build pipeline plugin ensures the same feature present in the pipeline that are created in the Declarative method. Normally, agent will be declared at the top-level as a global agent declaration.

So, Agent label is ideally mentioned with following parameters. Stages is the section which contain one or more stage tag. So, In this section we can write the part of continuous delivery process. This is the section which contain steps section or agent section which is isolated for the particular stage and other directives. A stage can have multiple commands to run for completing the continuous delivery process.

Environment is the directive which contains the Key-value pairs of environment variable that should be available for the steps that are going to be executed in the stages. Ideally, Environment directive supports special helper method called credentials type which is very helpful for dynamically passing the credentials into the steps. So, Following are the types of credentials that can be passed in to the environments. Input Directive is declared inside stage and it will help us getting input by prompting users.

Basically, The stage section will wait until any Input is submitted. So, Following are the configuration options.


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