Don't allow project to be shared with the group it is already in.

CHANGELOG-EE

@@ -5,6 +5,7 @@ v 7.9.0 (unreleased)
   - Use one custom header logo for all GitLab themes in appearance settings
   - Escape wildcards when searching LDAP by group name.
   - Group level Web Hooks
+  - Don't allow project to be shared with the group it is already in.
 
 v 7.8.0
   - Improved Jira issue closing integration

app/assets/javascripts/groups_select.js.coffee

@@ -2,6 +2,7 @@ class @GroupsSelect
   constructor: ->
     $('.ajax-groups-select').each (i, select) =>
       skip_ldap = $(select).hasClass('skip_ldap')
+      skip_group = $(select).data("skip-group")
 
       $(select).select2
         placeholder: "Search for a group"
@@ -9,7 +10,13 @@ class @GroupsSelect
         minimumInputLength: 0
         query: (query) ->
           Api.groups query.term, skip_ldap, (groups) ->
-            data = { results: groups }
+            data = { results: [] }
+            
+            for group in groups
+              continue if skip_group && group.path == skip_group
+
+              data.results.push(group)
+              
             query.callback(data)
 
         initSelection: (element, callback) ->

app/helpers/selects_helper.rb

@@ -33,7 +33,7 @@ module SelectsHelper
     css_class << (opts[:class] || '')
     value = opts[:selected] || ''
 
-    hidden_field_tag(id, value, class: css_class)
+    hidden_field_tag(id, value, class: css_class, data: { skip_group: opts[:skip_group] })
   end
 
   def admin_email_select_tag(id, opts = {})

app/models/project_group_link.rb

@@ -12,6 +12,7 @@ class ProjectGroupLink < ActiveRecord::Base
   validates :group_id, uniqueness: { scope: [:project_id], message: "already shared with this group" }
   validates :group_access, presence: true
   validates :group_access, inclusion: { in: Gitlab::Access.values }, presence: true
+  validate :different_group
 
   def self.access_options
     Gitlab::Access.options
@@ -24,4 +25,12 @@ class ProjectGroupLink < ActiveRecord::Base
   def human_access
     self.class.access_options.key(self.group_access)
   end
+
+  private 
+
+  def different_group
+    if self.group && self.project && self.project.group == self.group
+      errors.add(:base, "Project cannot be shared with the project it is in.")
+    end
+  end
 end

app/views/projects/group_links/index.html.haml

@@ -29,7 +29,7 @@
       .form-group
         = label_tag :link_group_id, 'Group', class: 'control-label'
         .col-sm-10
-          = groups_select_tag(:link_group_id)
+          = groups_select_tag(:link_group_id, skip_group: @project.group.try(:path))
       .form-group
         = label_tag :link_group_access, 'Max access level', class: 'control-label'
         .col-sm-10

db/schema.rb

@@ -394,11 +394,11 @@ ActiveRecord::Schema.define(version: 20150312000132) do
     t.string   "avatar"
     t.string   "import_status"
     t.float    "repository_size",               default: 0.0
-    t.text     "merge_requests_template"
     t.integer  "star_count",                    default: 0,        null: false
-    t.boolean  "merge_requests_rebase_enabled", default: false
     t.string   "import_type"
     t.string   "import_source"
+    t.text     "merge_requests_template"
+    t.boolean  "merge_requests_rebase_enabled", default: false
     t.boolean  "merge_requests_rebase_default", default: true
   end
 
@@ -514,7 +514,6 @@ ActiveRecord::Schema.define(version: 20150312000132) do
     t.string   "unconfirmed_email"
     t.boolean  "hide_no_ssh_key",               default: false
     t.string   "website_url",                   default: "",    null: false
-    t.datetime "admin_email_unsubscribed_at"
     t.string   "github_access_token"
     t.string   "gitlab_access_token"
     t.string   "notification_email"
@@ -522,6 +521,7 @@ ActiveRecord::Schema.define(version: 20150312000132) do
     t.boolean  "password_automatically_set",    default: false
     t.string   "bitbucket_access_token"
     t.string   "bitbucket_access_token_secret"
+    t.datetime "admin_email_unsubscribed_at"
   end
 
   add_index "users", ["admin"], name: "index_users_on_admin", using: :btree