Add support for cross project references for labels
## Summary
Support for cross project references for labels.
## Rationale
1. Cross project label references are currently not supported in GitLab
1. `to_reference` method signature in `Label` model breaks the abstraction introduced in `Referable`.
`concerns/referable.rb: def to_reference(_from_project = nil)`
Signatures:
```
label.rb: def to_reference(format = :id)
commit_range.rb: def to_reference(from_project = nil)
commit.rb: def to_reference(from_project = nil)
external_issue.rb: def to_reference(_from_project = nil)
group.rb: def to_reference(_from_project = nil)
issue.rb: def to_reference(from_project = nil)
merge_request.rb: def to_reference(from_project = nil)
milestone.rb: def to_reference(from_project = nil)
project.rb: def to_reference(_from_project = nil)
snippet.rb: def to_reference(from_project = nil)
user.rb: def to_reference(_from_project = nil)
```
This MR suggests using `def to_reference(from_project = nil, format: :id)` which makes use of keyword arguments and preserves abstract interface.
1. We need support for cross project label references when we want to move issue to another project
It may happen that issue description, system notes or comments contain reference to label and this reference will be invalid after moving issue to another project and will not be displayed correctly unless we have support for cross project references.
Merge request that needs this feature: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/2831
I think that cross project label references may be useful, (example: `Hey, see our issues for CI in GitLab CE! - gitab-org/gitlab-ce~"CI"`).
cc @JobV @DouweM @rspeicher
See merge request !2966
Indicate when an MR diverged from the target branch
This adds an indicator to the "Merge MR" box, to tell if and how much an MR diverged from its target branch.
For instance, consider an MR to merge the branch `feature` into `master`. Some other commits were added to `master` since `feature` was created, and the two branches diverged.
```text
o master
|
o o feature
| |
o o
| /
o
```
In this case, there will be a label in the MR Merge box stating:
> This MR is by 3 commits behind the target branch `master`.
## Screenshots
### The branch diverged from the target (UI Proposal)

### The branch diverged from the target (alternative UI Proposal)

## How is this useful?
- In a _rebase-workflow_ (MR are preferably rebased before being merged), the reviewer wants to know if an MR is rebased on the target branch before merging it.
_With this indicator, the reviewer knows immediately if the branch is rebased, or if she needs to ask the committer to rebase its branch._
<br>
- To keep the git history readable, a team prefers to avoid merging branches that really lag a lot behind the target branch. Merging an MR that is 10 commits behind is fine, but 200 is too much.
_With this indicator, the reviewer can see on the MR page if the branch is really far behind the target – or only a few commits behind._
## Open questions
We've been using this at @captaintrain for a few months now, and found it quite useful.
I guess the open-questions are mostly: what UI would be the more adequate? Any thoughts on this, on the general usefulness and/or on the code?
See merge request !2217
Flush repository caches before renaming projects
This should hopefully solve gitlab-org/gitlab-ce#13790. Once I know the exact steps to reproduce the problem I should be able to confirm this.
cc @dblessing @inem
See merge request !2974
Prior, if the user enabled 2FA, then disabled it and came back some time
after the grace period expired, they would be forced to enable 2FA
immediately.
Branded appearance to CE
Closes#11489
The difference with the EE version is only that there is no distinction between light and dark logos, though this wasn't used anyway. If this is fine, I'll create a MR on EE too.
TODO:
- [x] Copy docs
- [x] Make new screenshots
- [ ] Remove Custom Welcome message feature?
@rymai: I was unsure what labels to add to ping you, so I just ping you like this 😉
/cc @DouweM
See merge request !2927
Strip leading and trailing spaces in URL validator
_Originally opened at !2914 by @evuez._
It makes URLs in webhooks valid even if they contain leading and/or trailing spaces.
Spaces are hard to notice in input fields, this helps users by accepting leading and trailing spaces in webhooks URLs.
Fixes#13652
See merge request !2939
The only major difference with the EE version is the change from a light and dark logo to only a header logo
The dark logo wasn't used anyway, so it seemed to make sense to me to rename the field to the actual function of it
This ensures that if a project is later re-created using the old path it
doesn't end up re-using the old cache. This also ensures we don't keep
the cache around until its expired by Redis itself.
Fixesgitlab-org/gitlab-ce#13790
Add Todos
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/2425
Tasks:
- Prepare database
- [X] Create a new table (`todos`)
- Tasks Queue view
- [X] Add a number icon showing the number of todos on the top right next to the new and logout button that will redirect the user to the todos page
- [X] Add a chronological list of todos, with the 'Todos' tab active by default
- [X] Add a 'Done' button to each todo
- [x] Add filters (project, author, type, and action)
- Todos generation
- [X] When user issue/mr is assgined to someone
- [x] When user is mentioned on (issues/mr's/comments)
- Mark todo as `done`
- [X] When clicks on the 'Done' button
- [X] When edit issue/mr
- [X] When left/edit a comment
- [X] When reassign issue/mr
- [X] When add/remove labels to issue/mr
- [X] When issue/mr is closed
- [X] When mr is merged
- [X] When added an emoji
- [X] When changed the issue/mr milestone
* Screenshot:

See merge request !2817
This ensures that the emptiness cache (used for Repository#empty? and
Repository#has_visible_content?) is flushed after comitting changes
(using the web editor, API or Git) for new repositories. Once a
repository is no longer empty there's no need to explicitly flush the
cache for Repository#empty?. The cache for
Repository#has_visible_content? in turn is already flushed whenever
needed.
Fixesgitlab-org/gitlab-ce#13387
Add a `Blob` model that wraps `Gitlab::Git::Blob`
This allows us to take advantage of Rails' `to_partial_path` to render
the correct partial based on the Blob type, rather than cluttering the
view with conditionals.
It also allows (and will allow in the future) better encapsulation for
Blob-related logic which makes sense for our Rails app but might not
make as much sense for the core `gitlab_git` library, such as detecting
if the blob is an SVG.
See merge request !2887
Introduce API for serving the artifacts archive
Add API to download build artifacts archive in context of GitLab API
/cc @DouweM @grzesiek
See merge request !2893