GitVersion doesn't detect pull requests for Buildkite

[santhonisz]

Since GitVersion 5.8.2, support for running in Buildkite has been added. However when running GitVersion for pull requests in Buildkite, the returned version strings do not match the expected format.

Expected Behavior

The format of the returned variables e.g. SemVer should match the respective pull-request branch configuration as per the documentation.

For example if we had a repo that where main was currently on version 6.9.0, we would expect to see a version number on PRs such as "SemVer": "6.10.0-PullRequest022.1"

Actual Behavior

The format of the returned variables match the branch configuration of feature branches e.g. "SemVer": "6.10.0-foo.1"

Possible Fix

The problem is likely that for pull requests the BUILDKITE_BRANCH env var value references the head i.e. source branch of the PR. I assume this causes the regex pattern on the branch configuration to not match.

Steps to Reproduce

Follow the instructions as per the GitVersion documentation example, but run it for a PR.

Context

This creates a difference when running in Buildkite compared to our other CI systems (including TeamCity).

Your Environment

• Version Used: 5.8.2
• Operating System and version: Windows 10/ Windows Server 2019

[github-actions]

🎉 This issue has been resolved in version 5.8.3 🎉
The release is available on:

• GitHub Release
• Chocolatey Package
• .Net Global Tool

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