1. Starting version 2.11, git changed the way the pre-receive flow works.
- Previously, the new potential objects would be added to the main repo. If the
pre-receive passes, the new objects stay in the repo but are linked up. If
the pre-receive fails, the new objects stay orphaned in the repo, and are
cleaned up during the next `git gc`.
- In 2.11, the new potential objects are added to a temporary "alternate object
directory", that git creates for this purpose. If the pre-receive passes, the
objects from the alternate object directory are migrated to the main repo. If
the pre-receive fails the alternate object directory is simply deleted.
2. In our workflow, the pre-recieve script (in `gitlab-shell) calls the
`/allowed` endpoint, which calls out directly to git to perform
various checks. These direct calls to git do _not_ have the necessary
environment variables set which allow access to the "alternate object
directory" (explained above). Therefore these calls to git are not able to
access any of the new potential objects to be added during this push.
3. We fix this by accepting the relevant environment variables
(GIT_ALTERNATE_OBJECT_DIRECTORIES, GIT_OBJECT_DIRECTORY) on the
`/allowed` endpoint, and then include these environment variables while
calling out to git.
4. This commit includes (whitelisted) these environment variables while making
the "force push" check. A `Gitlab::Git::RevList` module is extracted to
prevent `ForcePush` from being littered with these checks.
GitlabShell verify access sending ‘_any’ as the changes made on the git command, in those cases Gitlab::Checks::ChangeAccess won’t receive a branch_name so we don’t need to check for access to the
protected branches on that repository. So we avoid some git operations in case the are not cached (empty_repo?) and some database lookups to get protected branches.
These request is happening in every push.
DRY code + fix rubocop
Add more test cases
Append to changelog
DRY changes list
find_url service for merge_requests
use GET for getting merge request links
remove files
rename to get_url_service
reduce loop
add test case for cross project
refactor tiny thing
update changelog
1. When a merge request is being merged, save the merge commit SHA in
the `in_progress_merge_commit_sha` database column.
2. The `pre-receive` hook looks for any locked (in progress) merge
request with `in_progress_merge_commit_sha` matching the `newrev` it
is passed.
3. If it finds a matching MR, the merge is legitimate.
4. Update `git_access_spec` to test the behaviour we added here. Also
refactored this spec a bit to make it easier to add more contexts / conditions.
