Migrate cache bash script to Go for helper image

Steve Xuereb - Out of Office back 2026-01-05requested to merge
3755-helper-image-for-windows-container-execution-bash-gitalb-runner-cache into master

What does this MR do?

Migrate cache bash script to Go for helper image

Why was this MR needed?

gitlab-runner-cache was being used to change the permissions, port this script to Go so that it is cross-platform.

The bash script loops through the paths but separating them with spaces, which will not work for Windows since it is a lot more common to have a directory with spaces. Looking at the usage of the script we always send 1 path so the loop was a bit redundant.

Are there points in the code the reviewer needs to double check?

Does this MR meet the acceptance criteria?

  • Documentation created/updated
  • Added tests for this feature/bug
  • In case of conflicts with master - branch was rebased

What are the relevant issue numbers?

#3755 (closed)

Edited by Kamil Trzciński

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