MergeRequest#show performance improvements
This is a first pass on improving the performance of the `MergeRequests#show` page. Notable changes:
- The "Commits" tab is loaded lazily, so the initial page load should be much faster for MRs with many commits.
- Relative timestamps via `timeago` are only initialized once per load instead of `O(n^2)`. This greatly improves frontend rendering times for a large number of commits.
- Refactored `User.find_for_commit` to use a single ARel-generated SQL query instead of the old method which resulted in one query, and could result in up to three.
See merge request !838
Fix Error 500 when one user attempts to access another's personal, internal snippet
### What does this MR do?
This MR fixes an Error 500 that occurred if one user tried to access another's personal, internal snippet. Steps to reproduce:
### Why was this MR needed?
1. Go to `<hostname>/snippets/new`.
2. Select "Internal".
3. Create a snippet. Save the URL (e.g. `<hostname>/snippets/20`)
4. Logout and sign in as another user.
5. Go to the URL in step 3.
### What are the relevant issue numbers?
Closes#1815
See merge request !854
Refactor and spec line highlighting Javascript
- Replaces the fragile Spinach tests for this feature with Jasmine tests
- The "Don't scroll the page when we click a line number" behavior now works as expected
See merge request !820
Fix 403 Access Denied error messages when accessing Labels section in a project
This would occur if the project's issues or merge requests features were disabled. The change in 9bcd36396b caused `can?(current_user, :read_merge_request, project)` to be false if the merge request feature were disabled, so `authorize_labels!` needs to be changed accordingly.
Closes#1813
See merge request !836
Code tweaks in 45e9150a caused the ldap_person method to not return expected results.
Improved tests to cover the ldap_person method, which was previously stubbed.
Fix hooks for web based events with external issue references
The creation of cross references for external issues (which would fail)
is now prevented. This fixes a 500 error and the execution of hooks when
creating a merge request or commenting on one.
Fixes#1650, GH-9333.
This regression might have been introduced by
8f8a8ab32b. There is actually a TODO by
@rspeicher mentioning external issues which is lost (unhandled) in a
later commit.
This fix is related to !766 and !804 which fix a similar issue for hooks for
Git based events.
See merge request !794
Fix post-receive errors on a push when an external issue tracker is configured
### What does this MR do?
This MR improves upon !766, fixing errors upon a git push that occur only when an external issue tracker (not JIRA) is used. This MR takes into account that external issue trackers, such as JIRA, may close issues. Disabling the processing of post-receive commits when an external issue tracker is configured seems like the wrong behavior.
### Why was this MR needed?
When a user adds an issue reference, the refactoring in 8f8a8ab and a6defd157 caused `project.get_issue` to be called, causing `ExternalIssue` to be returned when an external issue tracker was configured. This object does not have a `close` method, as needed in `CloseService`. Nor does it make sense to associate a `SystemNote` with this object.
GitLab EE uses a [special case for JIRA](https://gitlab.com/gitlab-org/gitlab-ee/blob/master/app/services/git_push_service.rb#L87). I would recommend moving this logic into `CloseService` too.
### What are the relevant issue numbers?
* Closes#1700
* Closes#1720
See merge request !804
