Merge branch 'allow-deploy-key-to-download-public-projects' into 'master'

Allow to pull code with deploy key from public projects

## What does this MR do?
With deploy keys you can download any public projects stored in GitLab.

## What are the relevant issue numbers?
Fixes: https://gitlab.com/gitlab-org/gitlab-ce/issues/1217

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5316

CHANGELOG

@@ -22,6 +22,7 @@ v 8.10.0 (unreleased)
   - Escape file extension when parsing search results !5141 (winniehell)
   - Apply the trusted_proxies config to the rack request object for use with rack_attack
   - Upgrade to Rails 4.2.7. !5236
+  - Allow to pull code with deploy key from public projects
   - Add Sidekiq queue duration to transaction metrics.
   - Add a new column `artifacts_size` to table `ci_builds` !4964
   - Let Workhorse serve format-patch diffs

lib/gitlab/git_access.rb

@@ -110,6 +110,7 @@ module Gitlab
 
     def deploy_key_can_read_project?
       if deploy_key
+        return true if project.public?
         deploy_key.projects.include?(project)
       else
         false

spec/lib/gitlab/git_access_spec.rb

@@ -44,12 +44,12 @@ describe Gitlab::GitAccess, lib: true do
   end
 
   describe 'download_access_check' do
+    subject { access.check('git-upload-pack') }
+
     describe 'master permissions' do
       before { project.team << [user, :master] }
 
       context 'pull code' do
-        subject { access.download_access_check }
-
         it { expect(subject.allowed?).to be_truthy }
       end
     end
@@ -58,8 +58,6 @@ describe Gitlab::GitAccess, lib: true do
       before { project.team << [user, :guest] }
 
       context 'pull code' do
-        subject { access.download_access_check }
-
         it { expect(subject.allowed?).to be_falsey }
       end
     end
@@ -71,16 +69,12 @@ describe Gitlab::GitAccess, lib: true do
       end
 
       context 'pull code' do
-        subject { access.download_access_check }
-
         it { expect(subject.allowed?).to be_falsey }
       end
     end
 
     describe 'without acccess to project' do
       context 'pull code' do
-        subject { access.download_access_check }
-
         it { expect(subject.allowed?).to be_falsey }
       end
     end
@@ -90,10 +84,31 @@ describe Gitlab::GitAccess, lib: true do
       let(:actor) { key }
 
       context 'pull code' do
-        before { key.projects << project }
-        subject { access.download_access_check }
+        context 'when project is authorized' do
+          before { key.projects << project }
 
-        it { expect(subject.allowed?).to be_truthy }
+          it { expect(subject).to be_allowed }
+        end
+
+        context 'when unauthorized' do
+          context 'from public project' do
+            let(:project) { create(:project, :public) }
+
+            it { expect(subject).to be_allowed }
+          end
+
+          context 'from internal project' do
+            let(:project) { create(:project, :internal) }
+
+            it { expect(subject).not_to be_allowed }
+          end
+
+          context 'from private project' do
+            let(:project) { create(:project, :internal) }
+
+            it { expect(subject).not_to be_allowed }
+          end
+        end
       end
     end
   end
@@ -240,5 +255,40 @@ describe Gitlab::GitAccess, lib: true do
         run_permission_checks(permissions_matrix.deep_merge(developer: { push_protected_branch: true, push_all: true, merge_into_protected_branch: true }))
       end
     end
+
+    describe 'deploy key permissions' do
+      let(:key) { create(:deploy_key) }
+      let(:actor) { key }
+
+      context 'push code' do
+        subject { access.check('git-receive-pack') }
+
+        context 'when project is authorized' do
+          before { key.projects << project }
+
+          it { expect(subject).not_to be_allowed }
+        end
+
+        context 'when unauthorized' do
+          context 'to public project' do
+            let(:project) { create(:project, :public) }
+
+            it { expect(subject).not_to be_allowed }
+          end
+
+          context 'to internal project' do
+            let(:project) { create(:project, :internal) }
+
+            it { expect(subject).not_to be_allowed }
+          end
+
+          context 'to private project' do
+            let(:project) { create(:project, :internal) }
+
+            it { expect(subject).not_to be_allowed }
+          end
+        end
+      end
+    end
   end
 end