Add missing group members to export for I/E

app/services/projects/import_export/export_service.rb

@@ -26,7 +26,7 @@ module Projects
       end
       def project_tree_saver
-        Gitlab::ImportExport::ProjectTreeSaver.new(project: project, shared: @shared)
+        Gitlab::ImportExport::ProjectTreeSaver.new(project: project, current_user: @current_user, shared: @shared)
       end
       def uploads_saver

changelogs/unreleased/fix-import-group-members.yml

+---
+title: Add ability to export project inherited group members to Import/Export
+merge_request: 8923
+author: 

doc/user/project/settings/import_export.md

@@ -14,6 +14,11 @@
 >    raketask.
 >  - The exports are stored in a temporary [shared directory][tmp] and are deleted
 >    every 24 hours by a specific worker.
+>  - Group members will get exported as project members, as long as the user has
+>    master or admin access to the group where the exported project lives. An admin
+>    in the import side is required to map the users, based on email or username.
+>    Otherwise, a supplementary comment is left to mention the original author and
+>    the MRs, notes or issues will be owned by the importer.
 Existing projects running on any GitLab instance or GitLab.com can be exported
 with all their related data and be moved into a new GitLab instance.
@@ -22,7 +27,7 @@ with all their related data and be moved into a new GitLab instance.
 | GitLab version | Import/Export version |
 | -------- | -------- |
-| 8.16.2 to current  | 0.1.6    |
+| 8.17.0 to current  | 0.1.6    |
 | 8.13.0   | 0.1.5    |
 | 8.12.0   | 0.1.4    |
 | 8.10.3   | 0.1.3    |

lib/gitlab/import_export/members_mapper.rb

@@ -32,6 +32,10 @@ module Gitlab
         @user.id
       end
+      def include?(old_author_id)
+        map.keys.include?(old_author_id) && map[old_author_id] != default_user_id
+      end
+
       private
       def missing_keys_tracking_hash

lib/gitlab/import_export/project_tree_saver.rb

@@ -5,8 +5,9 @@ module Gitlab
       attr_reader :full_path
-      def initialize(project:, shared:)
+      def initialize(project:, current_user:, shared:)
         @project = project
+        @current_user = current_user
         @shared = shared
         @full_path = File.join(@shared.export_path, ImportExport.project_filename)
       end
@@ -24,7 +25,29 @@ module Gitlab
       private
       def project_json_tree
-        @project.to_json(Gitlab::ImportExport::Reader.new(shared: @shared).project_tree)
+        project_json['project_members'] += group_members_json
+
+        project_json.to_json
+      end
+
+      def project_json
+        @project_json ||= @project.as_json(reader.project_tree)
+      end
+
+      def reader
+        @reader ||= Gitlab::ImportExport::Reader.new(shared: @shared)
+      end
+
+      def group_members_json
+        group_members.as_json(reader.group_members_tree).each do |group_member|
+          group_member['source_type'] = 'Project' # Make group members project members of the future import
+        end
+      end
+
+      def group_members
+        return [] unless @current_user.can?(:admin_group, @project.group)
+
+        MembersFinder.new(@project.project_members, @project.group).execute(@current_user)
       end
     end
   end

lib/gitlab/import_export/reader.rb

@@ -21,6 +21,10 @@ module Gitlab
         false
       end
+      def group_members_tree
+        @attributes_finder.find_included(:project_members).merge(include: @attributes_finder.find(:user))
+      end
+
       private
       # Builds a hash in the format described here: http://api.rubyonrails.org/classes/ActiveModel/Serializers/JSON.html

lib/gitlab/import_export/relation_factory.rb

@@ -89,7 +89,7 @@ module Gitlab
       end
       def has_author?(old_author_id)
-        admin_user? && @members_mapper.map.keys.include?(old_author_id)
+        admin_user? && @members_mapper.include?(old_author_id)
       end
       def missing_author_note(updated_at, author_name)

spec/lib/gitlab/import_export/members_mapper_spec.rb

@@ -116,5 +116,27 @@ describe Gitlab::ImportExport::MembersMapper, services: true do
         expect(members_mapper.map[exported_user_id]).to eq(user2.id)
       end
     end
+
+    context 'importing group members' do
+      let(:group) { create(:group) }
+      let(:project) { create(:empty_project, namespace: group) }
+      let(:members_mapper) do
+        described_class.new(
+          exported_members: exported_members, user: user, project: project)
+      end
+
+      before do
+        group.add_users([user, user2], GroupMember::DEVELOPER)
+        user.update(email: 'invite@test.com')
+      end
+
+      it 'maps the importer' do
+        expect(members_mapper.map[-1]).to eq(user.id)
+      end
+
+      it 'maps the group member' do
+        expect(members_mapper.map[exported_user_id]).to eq(user2.id)
+      end
+    end
   end
 end

spec/lib/gitlab/import_export/project_tree_saver_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe Gitlab::ImportExport::ProjectTreeSaver, services: true do
   describe 'saves the project tree into a json object' do
     let(:shared) { Gitlab::ImportExport::Shared.new(relative_path: project.path_with_namespace) }
-    let(:project_tree_saver) { described_class.new(project: project, shared: shared) }
+    let(:project_tree_saver) { described_class.new(project: project, current_user: user, shared: shared) }
     let(:export_path) { "#{Dir::tmpdir}/project_tree_saver_spec" }
     let(:user) { create(:user) }
     let(:project) { setup_project }
@@ -92,7 +92,7 @@ describe Gitlab::ImportExport::ProjectTreeSaver, services: true do
       end
       it 'has pipeline builds' do
-        expect(saved_project_json['pipelines'].first['statuses'].count { |hash| hash['type'] == 'Ci::Build'}).to eq(1)
+        expect(saved_project_json['pipelines'].first['statuses'].count { |hash| hash['type'] == 'Ci::Build' }).to eq(1)
       end
       it 'has pipeline commits' do
@@ -112,13 +112,13 @@ describe Gitlab::ImportExport::ProjectTreeSaver, services: true do
       end
       it 'has project and group labels' do
-        label_types = saved_project_json['issues'].first['label_links'].map { |link| link['label']['type']}
+        label_types = saved_project_json['issues'].first['label_links'].map { |link| link['label']['type'] }
         expect(label_types).to match_array(['ProjectLabel', 'GroupLabel'])
       end
       it 'has priorities associated to labels' do
-        priorities = saved_project_json['issues'].first['label_links'].map { |link| link['label']['priorities']}
+        priorities = saved_project_json['issues'].first['label_links'].map { |link| link['label']['priorities'] }
         expect(priorities.flatten).not_to be_empty
       end
@@ -140,6 +140,51 @@ describe Gitlab::ImportExport::ProjectTreeSaver, services: true do
         expect(project_tree_saver.save).to be true
       end
+
+      context 'group members' do
+        let(:user2) { create(:user, email: 'group@member.com') }
+        let(:member_emails) do
+          saved_project_json['project_members'].map do |pm|
+            pm['user']['email']
+          end
+        end
+
+        before do
+          Group.first.add_developer(user2)
+        end
+
+        it 'does not export group members if it has no permission' do
+          Group.first.add_developer(user)
+
+          expect(member_emails).not_to include('group@member.com')
+        end
+
+        it 'does not export group members as master' do
+          Group.first.add_master(user)
+
+          expect(member_emails).not_to include('group@member.com')
+        end
+
+        it 'exports group members as group owner' do
+          Group.first.add_owner(user)
+
+          expect(member_emails).to include('group@member.com')
+        end
+
+        context 'as admin' do
+          let(:user) { create(:admin) }
+
+          it 'exports group members as admin' do
+            expect(member_emails).to include('group@member.com')
+          end
+
+          it 'exports group members as project members' do
+            member_types = saved_project_json['project_members'].map { |pm| pm['source_type'] }
+
+            expect(member_types).to all(eq('Project'))
+          end
+        end
+      end
     end
   end
@@ -167,10 +212,10 @@ describe Gitlab::ImportExport::ProjectTreeSaver, services: true do
     commit_status = create(:commit_status, project: project)
     ci_pipeline = create(:ci_pipeline,
-                       project: project,
-                       sha: merge_request.diff_head_sha,
-                       ref: merge_request.source_branch,
-                       statuses: [commit_status])
+                         project: project,
+                         sha: merge_request.diff_head_sha,
+                         ref: merge_request.source_branch,
+                         statuses: [commit_status])
     create(:ci_build, pipeline: ci_pipeline, project: project)
     create(:milestone, project: project)

spec/lib/gitlab/import_export/reader_spec.rb

@@ -86,6 +86,10 @@ describe Gitlab::ImportExport::Reader, lib: true  do
       expect(described_class.new(shared: shared).project_tree).to match(include: [{ issues: { methods: [:name] } }])
     end
+    it 'generates the correct hash for group members' do
+      expect(described_class.new(shared: shared).group_members_tree).to match({ include: { user: { only: [:email] } } })
+    end
+
     def setup_yaml(hash)
       allow(YAML).to receive(:load_file).with(test_config).and_return(hash)
     end