Expose ci_default_git_depth via project API

Enable Get and Update of ci_default_git_depth for
Project API.

Renaming Project#default_git_depth to :ci_default_git_depth
to give more context through the API usage.

Add API documentation

app/models/project.rb

@@ -311,7 +311,7 @@ class Project < ApplicationRecord
   delegate :root_ancestor, to: :namespace, allow_nil: true
   delegate :last_pipeline, to: :commit, allow_nil: true
   delegate :external_dashboard_url, to: :metrics_setting, allow_nil: true, prefix: true
-  delegate :default_git_depth, :default_git_depth=, to: :ci_cd_settings
+  delegate :default_git_depth, :default_git_depth=, to: :ci_cd_settings, prefix: :ci
   # Validations
   validates :creator, presence: true, on: :create

app/presenters/ci/build_runner_presenter.rb

@@ -28,7 +28,7 @@ module Ci
       if git_depth_variable
         git_depth_variable[:value]
       elsif Feature.enabled?(:ci_project_git_depth, default_enabled: true)
-        project.default_git_depth
+        project.ci_default_git_depth
       end.to_i
     end

app/services/projects/fork_service.rb

@@ -43,10 +43,10 @@ module Projects
         shared_runners_enabled:    @project.shared_runners_enabled,
         namespace_id:              target_namespace.id,
         fork_network:              fork_network,
-        # We need to set default_git_depth to 0 for the forked project when
-        # @project.default_git_depth is nil in order to keep the same behaviour
+        # We need to set ci_default_git_depth to 0 for the forked project when
+        # @project.ci_default_git_depth is nil in order to keep the same behaviour
         # and not get ProjectCiCdSetting::DEFAULT_GIT_DEPTH set on create
-        ci_cd_settings_attributes: { default_git_depth: @project.default_git_depth || 0 },
+        ci_cd_settings_attributes: { default_git_depth: @project.ci_default_git_depth || 0 },
         # We need to assign the fork network membership after the project has
         # been instantiated to avoid ActiveRecord trying to create it when
         # initializing the project, as that would cause a foreign key constraint

changelogs/unreleased/expose-project-git-depth-via-api.yml

+---
+title: Get and edit ci_default_git_depth via project API
+merge_request: 29353
+author:
+type: added

doc/api/projects.md

@@ -143,6 +143,7 @@ When the user is authenticated and `simple` is not set this returns something li
     "forks_count": 0,
     "star_count": 0,
     "runners_token": "b8547b1dc37721d05889db52fa2f02",
+    "ci_default_git_depth": 50,
     "public_jobs": true,
     "shared_with_groups": [],
     "only_allow_merge_if_pipeline_succeeds": false,
@@ -225,6 +226,7 @@ When the user is authenticated and `simple` is not set this returns something li
     "forks_count": 0,
     "star_count": 0,
     "runners_token": "b8547b1dc37721d05889db52fa2f02",
+    "ci_default_git_depth": 0,
     "public_jobs": true,
     "shared_with_groups": [],
     "only_allow_merge_if_pipeline_succeeds": false,
@@ -334,6 +336,7 @@ GET /users/:user_id/projects
     "forks_count": 0,
     "star_count": 0,
     "runners_token": "b8547b1dc37721d05889db52fa2f02",
+    "ci_default_git_depth": 50,
     "public_jobs": true,
     "shared_with_groups": [],
     "only_allow_merge_if_pipeline_succeeds": false,
@@ -416,6 +419,7 @@ GET /users/:user_id/projects
     "forks_count": 0,
     "star_count": 0,
     "runners_token": "b8547b1dc37721d05889db52fa2f02",
+    "ci_default_git_depth": 0,
     "public_jobs": true,
     "shared_with_groups": [],
     "only_allow_merge_if_pipeline_succeeds": false,
@@ -528,6 +532,7 @@ GET /projects/:id
   "forks_count": 0,
   "star_count": 0,
   "runners_token": "b8bc4a7a29eb76ea83cf79e4908c2b",
+  "ci_default_git_depth": 50,
   "public_jobs": true,
   "shared_with_groups": [
     {
@@ -763,6 +768,7 @@ PUT /projects/:id
 | `tag_list`    | array   | no       | The list of tags for a project; put array of tags, that should be finally assigned to a project |
 | `avatar`    | mixed   | no      | Image file for avatar of the project                |
 | `ci_config_path` | string | no | The path to CI config file |
+| `ci_default_git_depth` | integer | no | Default number of revisions for [shallow cloning](../user/project/pipelines/settings.md#git-shallow-clone) |
 ## Fork project
@@ -1160,6 +1166,7 @@ Example response:
   "forks_count": 0,
   "star_count": 0,
   "runners_token": "b8bc4a7a29eb76ea83cf79e4908c2b",
+  "ci_default_git_depth": 50,
   "public_jobs": true,
   "shared_with_groups": [],
   "only_allow_merge_if_pipeline_succeeds": false,
@@ -1264,6 +1271,7 @@ Example response:
   "forks_count": 0,
   "star_count": 0,
   "runners_token": "b8bc4a7a29eb76ea83cf79e4908c2b",
+  "ci_default_git_depth": 50,
   "public_jobs": true,
   "shared_with_groups": [],
   "only_allow_merge_if_pipeline_succeeds": false,

lib/api/entities.rb

@@ -265,6 +265,7 @@ module API
       expose :open_issues_count, if: lambda { |project, options| project.feature_available?(:issues, options[:current_user]) }
       expose :runners_token, if: lambda { |_project, options| options[:user_can_admin_project] }
+      expose :ci_default_git_depth
       expose :public_builds, as: :public_jobs
       expose :ci_config_path, if: -> (project, options) { Ability.allowed?(options[:current_user], :download_code, project) }
       expose :shared_with_groups do |project, options|
@@ -287,6 +288,7 @@ module API
         # N+1 is solved then by using `subject.tags.map(&:name)`
         # MR describing the solution: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20555
         super(projects_relation).preload(:group)
+                                .preload(:ci_cd_settings)
                                 .preload(project_group_links: { group: :route },
                                          fork_network: :root_project,
                                          fork_network_member: :forked_from_project,

lib/api/helpers/projects_helpers.rb

@@ -29,6 +29,7 @@ module API
         optional :merge_method, type: String, values: %w(ff rebase_merge merge), desc: 'The merge method used when merging merge requests'
         optional :initialize_with_readme, type: Boolean, desc: "Initialize a project with a README.md"
         optional :external_authorization_classification_label, type: String, desc: 'The classification label for the project'
+        optional :ci_default_git_depth, type: Integer, desc: 'Default number of revisions for shallow cloning'
       end
       params :optional_project_params_ee do

spec/controllers/projects/settings/ci_cd_controller_spec.rb

@@ -212,7 +212,7 @@ describe Projects::Settings::CiCdController do
           subject
           project.reload
-          expect(project.default_git_depth).to eq(10)
+          expect(project.ci_default_git_depth).to eq(10)
         end
       end
     end

spec/presenters/ci/build_runner_presenter_spec.rb

@@ -134,7 +134,7 @@ describe Ci::BuildRunnerPresenter do
     end
     it 'defaults to git depth setting for the project' do
-      expect(git_depth).to eq(build.project.default_git_depth)
+      expect(git_depth).to eq(build.project.ci_default_git_depth)
     end
     context 'when feature flag :ci_project_git_depth is disabled' do

spec/requests/api/projects_spec.rb

@@ -1125,6 +1125,7 @@ describe API::Projects do
         expect(json_response['shared_with_groups'][0]['expires_at']).to be_nil
         expect(json_response['only_allow_merge_if_pipeline_succeeds']).to eq(project.only_allow_merge_if_pipeline_succeeds)
         expect(json_response['only_allow_merge_if_all_discussions_are_resolved']).to eq(project.only_allow_merge_if_all_discussions_are_resolved)
+        expect(json_response['ci_default_git_depth']).to eq(project.ci_default_git_depth)
         expect(json_response['merge_method']).to eq(project.merge_method.to_s)
         expect(json_response['readme_url']).to eq(project.readme_url)
       end
@@ -1963,6 +1964,7 @@ describe API::Projects do
                           snippets_enabled: true,
                           merge_requests_enabled: true,
                           merge_method: 'ff',
+                          ci_default_git_depth: 20,
                           description: 'new description' }
         put api("/projects/#{project3.id}", user4), params: project_param

spec/requests/api/runner_spec.rb

@@ -445,7 +445,7 @@ describe API::Runner, :clean_gitlab_redis_shared_state do
               'before_sha' => job.before_sha,
               'ref_type' => 'branch',
               'refspecs' => ["+refs/heads/#{job.ref}:refs/remotes/origin/#{job.ref}"],
-              'depth' => project.default_git_depth }
+              'depth' => project.ci_default_git_depth }
           end
           let(:expected_steps) do
@@ -533,7 +533,7 @@ describe API::Runner, :clean_gitlab_redis_shared_state do
             context 'when GIT_DEPTH is not specified and there is no default git depth for the project' do
               before do
-                project.update!(default_git_depth: nil)
+                project.update!(ci_default_git_depth: nil)
               end
               it 'specifies refspecs' do
@@ -593,7 +593,7 @@ describe API::Runner, :clean_gitlab_redis_shared_state do
             context 'when GIT_DEPTH is not specified and there is no default git depth for the project' do
               before do
-                project.update!(default_git_depth: nil)
+                project.update!(ci_default_git_depth: nil)
               end
               it 'specifies refspecs' do

spec/services/projects/fork_service_spec.rb

@@ -150,21 +150,21 @@ describe Projects::ForkService do
         context "when origin has git depth specified" do
           before do
-            @from_project.update(default_git_depth: 42)
+            @from_project.update(ci_default_git_depth: 42)
           end
           it "inherits default_git_depth from the origin project" do
-            expect(to_project.default_git_depth).to eq(42)
+            expect(to_project.ci_default_git_depth).to eq(42)
           end
         end
         context "when origin does not define git depth" do
           before do
-            @from_project.update!(default_git_depth: nil)
+            @from_project.update!(ci_default_git_depth: nil)
           end
           it "the fork has git depth set to 0" do
-            expect(to_project.default_git_depth).to eq(0)
+            expect(to_project.ci_default_git_depth).to eq(0)
           end
         end
       end