Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/9206

Signed-off-by: NRémy Coutable <remy@rymai.me>

Signed-off-by: NRémy Coutable <remy@rymai.me>

Signed-off-by: NRémy Coutable <remy@rymai.me>

Signed-off-by: NRémy Coutable <remy@rymai.me>

Introduce `default:` configuration entry setting that makes it possible
to configure a default value of an entry, what overrides class-level
`def self.default` value.

Retries in Sidekiq and in the remote mirror scheduler can cause repeated
attempts in quick succession if the sync fails. Each failure will then
send an e-mail to all project maintainers, which can spam users
unnecessarily.

Modify the logic to send one notification the first time the mirror
fails by setting `error_notification_sent` to `true` and reset the
flag after a successful sync.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56222

This backports changes made in
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9134.

In theory the case could happen that the initial linking of the pool
fails and so do all the retries that Sidekiq performs. This could lead
to data loss.

To prevent that case, linking is done before Gits GC too. This makes
sure that case doesn't happen.

For features the feature gates are sometimes projects, not groups or
users. For example for git object pools:
https://gitlab.com/gitlab-com/gl-infra/infrastructure/issues/5872

This commit allows for setting feature group gates based on projects, by its
path as that seems most convenient.

- Add tests for project topics

GitLab Pages supports projects hosted under a subgroup, but not subgroup
websites. That means that only the highest-level group supports

i.e.:
You created a group for your engineering department called
`engineering`, a subgroup for all your documentation websites called
`docs`,and a project within this subgroup is called `workflows`.
Your project URL is `https://gitlab.com/engineering/docs/workflows/`.
Once you enable GitLab Pages for this project, the site will live under
`https://engineering.gitlab.io/docs/workflows`.

After upgrading to Ruby 2.5.3, we switched `URI.join` in favor of
`Gitlab::Utils.append_path`. However,
ActionController::Base.helpers.image_path can return a full URL if a CDN
host is present.

Rails provides a way to generate the full URL using the asset path, but
that doesn't appear to work because `request` is nil`.

Revert to the previous behavior to handle CDNs and relative URLs.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56268

The importer would display a 500 error page if you attempted to import
using a non-existent DNS entry. This commit rescues known network issues
and consolidates them into
BitbucketServer::Connection::ConnectionError`.  The previous error
handling in the paginator doesn't work because it returns a lazy
collection.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56154

1. Avoid suggestions being applied on the same file
from reverting previous changes
2. Gracefully use and handle file changes error
when updating the file (though, it does not totally
solves the sync problem for multiple suggestion
applications at once)

* Remove headerAction getter from job getters
* Remove prop from being passed into header_ci_component
* Remove no longer needed tests

Avoid doing sequential database queries to load the namespaces and the
routes of projects and namespaces.

This results in the following query:

```sql
SELECT "projects"."id" AS t0_r0,
       "projects"."name" AS t0_r1,
       "projects"."path" AS t0_r2,
       "projects"."description" AS t0_r3,
       "projects"."created_at" AS t0_r4,
       "projects"."updated_at" AS t0_r5,
       "projects"."creator_id" AS t0_r6,
       "projects"."namespace_id" AS t0_r7,
       "projects"."last_activity_at" AS t0_r8,
       "projects"."import_url" AS t0_r9,
       "projects"."visibility_level" AS t0_r10,
       "projects"."archived" AS t0_r11,
       "projects"."avatar" AS t0_r12,
       "projects"."import_status" AS t0_r13,
       "projects"."star_count" AS t0_r14,
       "projects"."import_type" AS t0_r15,
       "projects"."import_source" AS t0_r16,
       "projects"."import_error" AS t0_r17,
       "projects"."ci_id" AS t0_r18,
       "projects"."shared_runners_enabled" AS t0_r19,
       "projects"."runners_token" AS t0_r20,
       "projects"."build_coverage_regex" AS t0_r21,
       "projects"."build_allow_git_fetch" AS t0_r22,
       "projects"."build_timeout" AS t0_r23,
       "projects"."pending_delete" AS t0_r24,
       "projects"."public_builds" AS t0_r25,
       "projects"."last_repository_check_failed" AS t0_r26,
       "projects"."last_repository_check_at" AS t0_r27,
       "projects"."container_registry_enabled" AS t0_r28,
       "projects"."only_allow_merge_if_pipeline_succeeds" AS t0_r29,
       "projects"."has_external_issue_tracker" AS t0_r30,
       "projects"."repository_storage" AS t0_r31,
       "projects"."request_access_enabled" AS t0_r32,
       "projects"."has_external_wiki" AS t0_r33,
       "projects"."ci_config_path" AS t0_r34,
       "projects"."lfs_enabled" AS t0_r35,
       "projects"."description_html" AS t0_r36,
       "projects"."only_allow_merge_if_all_discussions_are_resolved" AS t0_r37,
       "projects"."printing_merge_request_link_enabled" AS t0_r38,
       "projects"."auto_cancel_pending_pipelines" AS t0_r39,
       "projects"."import_jid" AS t0_r40,
       "projects"."cached_markdown_version" AS t0_r41,
       "projects"."delete_error" AS t0_r42,
       "projects"."last_repository_updated_at" AS t0_r43,
       "projects"."storage_version" AS t0_r44,
       "projects"."resolve_outdated_diff_discussions" AS t0_r45,
       "projects"."repository_read_only" AS t0_r46,
       "projects"."merge_requests_ff_only_enabled" AS t0_r47,
       "projects"."merge_requests_rebase_enabled" AS t0_r48,
       "projects"."jobs_cache_index" AS t0_r49,
       "projects"."pages_https_only" AS t0_r50,
       "projects"."remote_mirror_available_overridden" AS t0_r51,
       "projects"."pool_repository_id" AS t0_r52,
       "projects"."runners_token_encrypted" AS t0_r53,
       "projects"."bfg_object_map" AS t0_r54,
       "namespaces"."id" AS t1_r0,
       "namespaces"."name" AS t1_r1,
       "namespaces"."path" AS t1_r2,
       "namespaces"."owner_id" AS t1_r3,
       "namespaces"."created_at" AS t1_r4,
       "namespaces"."updated_at" AS t1_r5,
       "namespaces"."type" AS t1_r6,
       "namespaces"."description" AS t1_r7,
       "namespaces"."avatar" AS t1_r8,
       "namespaces"."share_with_group_lock" AS t1_r9,
       "namespaces"."visibility_level" AS t1_r10,
       "namespaces"."request_access_enabled" AS t1_r11,
       "namespaces"."description_html" AS t1_r12,
       "namespaces"."lfs_enabled" AS t1_r13,
       "namespaces"."parent_id" AS t1_r14,
       "namespaces"."require_two_factor_authentication" AS t1_r15,
       "namespaces"."two_factor_grace_period" AS t1_r16,
       "namespaces"."cached_markdown_version" AS t1_r17,
       "namespaces"."runners_token" AS t1_r18,
       "namespaces"."runners_token_encrypted" AS t1_r19,
       "routes"."id" AS t2_r0,
       "routes"."source_id" AS t2_r1,
       "routes"."source_type" AS t2_r2,
       "routes"."path" AS t2_r3,
       "routes"."created_at" AS t2_r4,
       "routes"."updated_at" AS t2_r5,
       "routes"."name" AS t2_r6,
       "routes_projects"."id" AS t3_r0,
       "routes_projects"."source_id" AS t3_r1,
       "routes_projects"."source_type" AS t3_r2,
       "routes_projects"."path" AS t3_r3,
       "routes_projects"."created_at" AS t3_r4,
       "routes_projects"."updated_at" AS t3_r5,
       "routes_projects"."name" AS t3_r6
FROM "projects"
LEFT OUTER JOIN "namespaces" ON "namespaces"."id" = "projects"."namespace_id"
LEFT OUTER JOIN "routes" ON "routes"."source_id" = "namespaces"."id"
AND "routes"."source_type" = $1
LEFT OUTER JOIN "routes" "routes_projects" ON "routes_projects"."source_id" = "projects"."id"
AND "routes_projects"."source_type" = $2
LEFT OUTER JOIN "project_repositories" ON "projects"."id" = "project_repositories"."project_id"
WHERE ("projects"."storage_version" IS NULL
       OR "projects"."storage_version" = 0)
  AND "project_repositories"."project_id" IS NULL
  AND ("projects"."id" BETWEEN $3 AND $4);
  -- [["source_type", "Namespace"],
  --  ["source_type", "Project"],
  --  ["id", 1],
  --  ["id", 4]]
```

On GitLab.com, we saw numerous duplicate disk entry inserts because
the migration was not taking the routes table into account. We now
implement this in the migration to be consistent.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56061

Previously the nullification wasn't done, as the only caller would later
destroy the model all together. In
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9070 this change
was made. This commit is basically a backport before that MR is merged.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/31910, https://gitlab.com/gitlab-org/gitlab-ce/issues/32588

We introduced releases_page feature flag.
Given this feature is deemed stable, we should remove
this flag before 19th.

Modifies authorize! method to accept a third param, and then use it in
combination with 'add_cluster' policy to appropriately restrict adding
multiple clusters

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56110