Make Merge Request source and target branch available in GitLabCIPullRequestInfo

[ap0llo]

Prerequisites

• I have written a descriptive issue title
• I have searched issues to ensure it has not already been reported

Cake runner

Cake Frosting

Cake version

5.0.0

Operating system

Windows

Operating system architecture

x64

CI Server

GitLab CI

What are you seeing?

GitLabCIPullRequestInfo provides information about the current pull request/merge request when running in GitLab CI.

However, it does not make available the source and target branch of the Merge Request.

What is expected?

GitLabCIPullRequestInfo should provide the source and target branch, analogous to e.g. AzurePipelinesPullRequestInfo

Steps to Reproduce

N/A

Output log

N/A

Workaround

The source and target branch can be determined by reading the environment variable CI_MERGE_REQUEST_SOURCE_BRANCH_NAME respectively CI_MERGE_REQUEST_TARGET_BRANCH_NAME