A project is needed in order to fetch data from gitaly. Projects can be
absent from commits in certain rare situations (like when viewing a MR
of a deleted fork). In these cases, assume that the enriched data is not
needed.

See this comment:

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/26144#note_152191106

"It's led to a dilemma about where to "fix" this in code. I'm going
to fix it by allowing CommitCollection#enrich! to just return unenriched
commits when a project is missing, essentially "silently failing". I
hope this is the right decision. It's going with the assumption that
calls in these situations in the future are not needing the full data.
The alternative would be to allow CommitCollection#enrich! to still
error, but handle it in the methods that call #enrich!, however that
might lead to brittleness in future when working with project-less MRs."

Previously the code for excluding merge commits from the commit
collection (CommitCollection#without_merge_commits) was not working
when the commits had come from a merge request. Now that this has been
fixed, these tests fails. They should always have been written to
exclude merge commits when comparing.

Allow incomplete commit records to load their full data from gitaly.

Commits can be based on a Hash of data retrieved from PostgreSQL, and
this data can be intentionally incomplete in order to save space.

A new method #gitaly? has been added to Gitlab::Git::Commit, which
returns true if the underlying data source of the Commit is a
Gitaly::GitCommit.

CommitCollection now has a method #enrich which replaces non-gitaly
commits in place with commits from gitaly.

CommitCollection#without_merge_commits has been updated to call this
method, as in order to determine a merge commit we need to have parent
data.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/58805

Quarantine failing test

See merge request gitlab-org/gitlab-ce!26119

Hide 404 errors in Karma locally

See merge request gitlab-org/gitlab-ce!26073

Docs: Cleaning up the merge request workflow

Closes #51355

See merge request gitlab-org/gitlab-ce!24559

Fix bug "Fatal: Could not parse object {COMMIT_HASH}"

See merge request gitlab-org/gitlab-ce!25860

Update rubocop target ruby version

See merge request gitlab-org/gitlab-ce!24804

Fix incorrect link format in docs

See merge request gitlab-org/gitlab-ce!26103

Removes EE differences for folder_view

Closes gitlab-ee#10026

See merge request gitlab-org/gitlab-ce!26053

Fix false positive specs

See merge request gitlab-org/gitlab-ce!26031

Add merge request pipeline flag to pipeline entity

See merge request gitlab-org/gitlab-ce!25846

CE port of "e2e test for creating a project from instance template"

See merge request gitlab-org/gitlab-ce!25760

Allow modifying squash commit message for fast-forward only merge method

Closes #48324, #58805, and #58631

See merge request gitlab-org/gitlab-ce!26017

- fixed tests for edit components

Resolve differences in Webpack config between CE and EE

See merge request gitlab-org/gitlab-ce!26100

Use project name and ID in Review App environment URLs instead of the project path slug

Closes #52990

See merge request gitlab-org/gitlab-ce!25990

Fix some 404ing links

See merge request gitlab-org/gitlab-ce!25789

Update recaptcha gem from 3.x to 4.11

See merge request gitlab-org/gitlab-ce!25921

Add spec

Fix

Fix

Add changelog

Drop attached

Remove attached

Update changelog

ok

Allow filtering labels by a single character

Closes #58795

See merge request gitlab-org/gitlab-ce!26012

Docs: Bring Javascript Style Guide in line with docs standards

See merge request gitlab-org/gitlab-ce!25026

Resolve "Remove jquery-atwho-rails gem"

Closes #58876

See merge request gitlab-org/gitlab-ce!26058

Remove references to the vendored copies of At.js and jquery.carat
as well as the legacy rails wrapper gem.

Refactor all_pipelines in Merge request in order to support all pipelines for merge request

See merge request gitlab-org/gitlab-ce!25676

Fix 500 error caused by CODEOWNERS with no matches

Closes gitlab-ee#10282

See merge request gitlab-org/gitlab-ce!26072

Removes the CDN loading for emojis.json

See merge request gitlab-org/gitlab-ce!26102

Update group policy to reflect all the requirements

See merge request gitlab-org/gitlab-ce!25854

Make it sane

Include merge ref head

Fix union

Improve a bit

Add spec

remove

add spec

Add changelog

fix coding offence

Apply suggestion to spec/models/merge_request_spec.rb

ok

ok

Fix

Fix spec

Fix spec

fix

Simplify the things

Memoize

OK

a

Ignore user status emoji in assertion

Closes gitlab-org/quality/staging#45

See merge request gitlab-org/gitlab-ce!26085