Allow specifying protected branches using wildcards
Closes#18627
# Tasks
- [ ] #18627!4665 Allow specifying protected branches using wildcards
- [x] Find existing usages of protected branches
- Protecting branches
- `ProtectedBranchesController` is used to mark a branch protected/unprotected
- `API::Branches` can be used to mark a branch protected/unprotected
- Enforcing branch protection
- `Gitlab::GitAccess` has helpers (`can_push_to_branch?`, `check`) that are used to deny pushes if a branch is protected
- Over SSH: `gitlab-shell` receives a push, and calls `/allowed` on the GitLab API, which calls `GitAccess.check`
- Over HTTP:
- `gitlab-workhorse` receives the request, and forwards it to rails
- Rails (in the `GitHttpController#git-recieve-pack`) runs basic checks (is the user logged in, not protected branch checks) and returns ok with `GL_ID` and `RepoPath`
- `gitlab-workhorse` looks at the response, and calls the relevant `gitlab-shell` action from `git-http/handlePostRPC`
- Rest of this flow is the same as the SSH flow above
- [x] Implementation
- [x] Backend
- [x] Change `project#protected_branch?` to look at wildcard protected branches
- [x] Change `project#developers_can_push_to_protected_branch?`
- [x] Change `project#open_branches`
- [x] Better error message when creating a disallowed branch from the Web UI
- [x] Frontend
- [x] Protected branches page should allow typing out a wildcard pattern
- [x] Add help text explaining the use of wildcards
- [x] Show matching branches for each protected branch
- [x] ~~On the index page~~
- [x] On a show page
- [x] Index?
- [x] Can't have the "last commit" column for wildcard protected branches
- [x] Fix / write tests
- [x] What happens if a hook is missing in dev?
- [x] Refactor
- [x] Test workflows
- Create a branch matching a wildcard pattern
- Push to a branch matching a wildcard pattern
- Force push to a branch matching a wildcard pattern
- Delete a branch matching a wildcard pattern
- [x] Test using Web UI
- [x] Test over SSH
- [x] Test over HTTP
- [x] Test as developer and master
- [x] Investigate performance
- [x] Test with a large number of protected branches / branches
- [x] Paginate list of protected branches
- [x] ~~Possibly rewrite `open_branches`~~
- [x] Add `iid`s to existing `ProtectedBranch`es
- [x] Add documentation
- [x] Add CHANGELOG entry
- [x] Add screenshots
- [x] Make sure [build](2f753e3ed2/builds) passes
- [x] Assign to endboss for review
- [x] Address @DouweM's comments
- [x] `protected_branch_params`
- [x] `exact_match` instead of `explicit_match`
- [x] When would self.name be blank?
- [x] Move `protected_branches.each` to a partial
- [x] Move `matching_branches.each` to a partial
- [x] If the branch is in @matching_branches, it's not been removed
- [x] move this regex to a method and memoize it
- [x] `commit_sha` directly for exact matches
- [x] Number of matches for wildcard matches, with a link
- [x] Wait for [build](43f9ce0e88/builds) to pass
- [x] Respond to @DouweM's comments
- [x] Don't use iid
- [x] Controller should use `@project.protected_branches.new`
- [x] move the memoization to `def wildcard_regex`
- [x] render with `collection: @protected_branches`
- [x] Wait for [build](f7beedf122/builds) to pass
- [x] Wait for @DouweM's review
- [x] Wait for @jschatz1's review
- [x] Respond to @jschatz1's comments
- [x] Use the new dropdown style
- [x] description should be moved to the description section without the styling
- [x] Protect button should be disabled when no branch is selected
- [x] Update screenshots
- [x] Merge conflicts
- [x] Make sure [build](20f3cfe8d5/builds) passes
- [ ] Revisit performance, possibly with staging/production data
- [ ] Get a dump of staging / run against staging live
- [ ] Get SSH access to staging
- [ ] Wait for review/merge
# Screenshots
## Creating wildcard protected branches
### Using the `GLDropdown` component
## Enforcing wildcard protected branches
### From the Web UI
### Over SSH
### Over HTTPS
## Listing matching branches
See merge request !4665
Note: This feature was developed independently on master while this was
in review. I've removed the conflicting bits and left the relevant
additions, mainly a test for `Gitlab::Git::Hook`. The original commit
message follows:
1. `gitlab-shell` outputs errors to `stderr`, but we weren't using this
information, prior to this commit. Now we capture the `stderr`, and
display it in the flash message when branch creation fails.
2. This can be used to display better errors for other git operation
failures with small tweaks.
3. The return value of `Gitlab::Git::Hook#trigger` is changed from a
simple `true`/`false` to a tuple of `[status, errors]`. All usages
and tests have been updated to reflect this change.
4. This is only relevant to branch creation _from the Web UI_, since SSH
and HTTP pushes access `gitlab-shell` either directly or through
`gitlab-workhorse`.
5. A few minor changes need to be made on the `gitlab-shell` end. Right
now, the `stderr` message it outputs is prefixed by "GitLab: ", which
shows up in our flash message. This is better removed.
