Use shelling out to git to write refs instead of rugged, hoping to
avoid creating invalid refs.

To update HEAD we switched to using `git symbolic-ref`.

Batch load only data from same repository when lazy object is accessed

See merge request gitlab-org/gitlab-ce!23309

Cache project HEAD to prevent unnecessary Gitaly calls

See merge request gitlab-org/gitlab-ce!23307

Allow to store null variables

Closes #54379

See merge request gitlab-org/gitlab-ce!23299

CE Backport: Extract Gitlab::Prometheus::QueryVariables

See merge request gitlab-org/gitlab-ce!23335

Refactor issue boards switcher to single file Vue component (CE-port)

See merge request gitlab-org/gitlab-ce!23274

CE port for qa-193-ldap-group-sync EE branch

See merge request gitlab-org/gitlab-ce!22834

Add @vue/test-utils as dev dependency

See merge request gitlab-org/gitlab-ce!23345

By specifying `key`, we get a different lazy batch loader for each
repository, which means that accessing a lazy object from one repository
will only result in that repository's objects being fetched, not those
of other repositories, saving us some unnecessary Gitaly lookups.

Externalize strings from `/app/views/project/runners`

See merge request gitlab-org/gitlab-ce!23208

Exclude qa-frontend from running on docs-only branches

See merge request gitlab-org/gitlab-ce!23327

Instruct against squashing in CE to EE MRs

See merge request gitlab-org/gitlab-ce!23330

Attempt to fix lazy loader spec transient failure

Closes #49511

See merge request gitlab-org/gitlab-ce!22918

Fix documentation on using prettier for a specific directory

See merge request gitlab-org/gitlab-ce!23336

Use Gitaly 1.0.0

Closes gitaly#1406

See merge request gitlab-org/gitlab-ce!23323

WebIDE: Make Ctrl+Enter automatically commit when commit textarea is focused

Closes #46544

See merge request gitlab-org/gitlab-ce!23049

Update to properly reference users instead of projects

See merge request gitlab-org/gitlab-ce!23325

Run `yarn prettier-all-save`

Closes #54462

See merge request gitlab-org/gitlab-ce!23342

Add month unit

See merge request gitlab-org/gitlab-ce!23297

If the `check` parameter is used, the `allFiles` parameter is `false`,
which causes the prettier.js script only to process staged files.
The correct parameters are `check-all` and `save-all`.

Speed up setting of relative position

See merge request gitlab-org/gitlab-ce!23324

Resolve "Filter by `None`/`Any` for labels in issues/mrs API"

Closes #52371

See merge request gitlab-org/gitlab-ce!22622

Add docs note for Reverting MR availability

See merge request gitlab-org/gitlab-ce!22289