Using Jenkins Git Parameter Plugin to Retrieve Project Branches

In a Jenkins pipeline, the first step is usually to download the source code. This guide explains how Jenkins can retrieve branch information using the git parameter plugin.

First, install the git parameter plugin by searching for the keyword git in the Jenkins plugin manager and restart Jenkins after installation.

Next, obtain the GitLab project URL and configure the Jenkins job with the repository address and the desired branch (default is master). After saving, enable Parameterized Build to display the retrieved branch list.

If the project lacks a git checkout step, Jenkins will show an error image (as illustrated) because the plugin depends on the checkout step to fetch parameters.

To reproduce the error, remove the shared library configuration that provides Git information and save the pipeline without a checkout step; the error will appear.

The plugin simplifies branch retrieval but requires the git checkout step; without it, the parameters cannot be obtained.

Consider scenarios where the pipeline does not download code but only needs project metadata; a future article will show how to create dynamic parameters to achieve the same effect.

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