Set environment variable to let MM identify Omnibus installs

files/gitlab-cookbooks/mattermost/libraries/mattermost_helper.rb

@@ -46,7 +46,8 @@ class MattermostHelper
       'MM_GITLABSETTINGS_TOKENENDPOINT' => node['mattermost']['gitlab_token_endpoint'].to_s,
       'MM_GITLABSETTINGS_USERAPIENDPOINT' => node['mattermost']['gitlab_user_api_endpoint'].to_s,
       'MM_PLUGINSETTINGS_DIRECTORY' => node['mattermost']['plugin_directory'].to_s,
-      'MM_PLUGINSETTINGS_CLIENTDIRECTORY' => node['mattermost']['plugin_client_directory'].to_s
+      'MM_PLUGINSETTINGS_CLIENTDIRECTORY' => node['mattermost']['plugin_client_directory'].to_s,
+      'MM_INSTALL_TYPE' => 'gitlab_omnibus'
     }
   end
 end unless defined?(MattermostHelper) # Prevent reloading in chefspec: https://github.com/sethvargo/chefspec/issues/562#issuecomment-74120922

spec/chef/recipes/mattermost_spec.rb

@@ -12,6 +12,7 @@ RSpec.describe 'gitlab::mattermost' do
       'MM_GITLABSETTINGS_SECRET' => '',
       'MM_GITLABSETTINGS_TOKENENDPOINT' => 'http://gitlab.example.com/oauth/token',
       'MM_GITLABSETTINGS_USERAPIENDPOINT' => 'http://gitlab.example.com/api/v4/user',
+      'MM_INSTALL_TYPE' => 'gitlab_omnibus',
       'MM_LOGSETTINGS_FILELOCATION' => '/var/log/gitlab/mattermost',
       'MM_PLUGINSETTINGS_CLIENTDIRECTORY' => '/var/opt/gitlab/mattermost/client-plugins',
       'MM_PLUGINSETTINGS_DIRECTORY' => '/var/opt/gitlab/mattermost/plugins',