tree 9e9a2d679ccaae38d5840e781dfa434642cdddbe
parent ec664ac370e11edb07d070ce35b7c53d5575bdea
author Harrison Mutai <harrison.mutai@arm.com> 1752654418 +0000
committer Govindraj Raja <govindraj.raja@arm.com> 1752772368 -0500

fix: make merge base fetching more robust

Several static check scripts rely on identifying the Git merge base via
get_merge_base, which may fail if the local Git history is too shallow.
This causes issues when checking patches on CI or LTS branches with
limited fetch depth.

To address this:

- Reuse a single evaluated merge_base instead of invoking get_merge_base
  multiple times.
- If merge_base is not found initially, attempt to fetch more history
  from the remote using the appropriate GERRIT_REFSPEC.
- Exit with an error if a merge base cannot be found even after
  fetching.

This improves reliability of static checks when working on partial
clones or CI environments where fetch depth is restricted.

Change-Id: Icccec0eb2f29d254e54bbd6b639f6c1ef11291a3
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
(cherry picked from commit 789decfc87c56fc559c6b0212f82217cbc905797)