Скачать или смотреть How to Assign Value to PowerShell Variable Within Jenkins Pipeline

Learn how to effectively assign and use `PowerShell` variable values within a `Jenkins` pipeline for enhanced automation and scripting capabilities.
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Harnessing PowerShell Variables in a Jenkins Pipeline

When automating processes in Jenkins, you may find yourself needing to run PowerShell scripts and wanting to use the output from one script in subsequent scripts. This issue arises quite often, especially when you want to perform additional operations with the result of a prior command.

In this post, we'll discuss how to capture output from a PowerShell script in a Jenkins pipeline and use it in a subsequent node. This approach streamlines your pipeline and allows for greater flexibility in your automation scripts.

The Problem

You might have a Jenkins pipeline where you want to execute a PowerShell script that outputs a message, and then you want to utilize that output in another PowerShell script in a different node. Using a regular variable won't work between nodes, so how do you share that output?

Example of the Situation

Consider the following example where we want to execute a script and capture the output:

[[See Video to Reveal this Text or Code Snippet]]

After capturing the output in msg, the challenge is how to use this in the next PowerShell script.

The Solution

To solve this problem, we can utilize environment variables to store the output in one node and access it in another. Here’s how to do it in a step-by-step format:

Step 1: Assign the Output to an Environment Variable

In your Jenkins pipeline, use env to store the script output as follows:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Access the Environment Variable in the Next Node

In the subsequent node, you can retrieve the value of env.msg by referencing it as an environment variable. Here’s how to write the next node:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of Key Elements

env.msg: Prefixing with env allows you to use the variable across different nodes of the pipeline.

Accessing Variables in PowerShell: In PowerShell, you use $env: to reference environment variables.

Trimming Output: Always remember to apply .trim() to remove any extra newline characters from the captured output. This prevents unexpected formatting issues later on.

Additional Tips

Make sure to follow the proper syntax when writing your PowerShell script.

Test your outputs in a controlled manner to ensure that you are getting the expected results at each stage of your pipeline.

Conclusion

By assigning PowerShell output to environment variables in Jenkins, you can achieve a seamless flow of information between different nodes in your pipeline. This approach not only simplifies your scripts but also enhances the overall maintainability of your Jenkins jobs.

Now you're equipped to capture and utilize PowerShell outputs effectively in Jenkins pipelines. Happy scripting!