[packagechooser] Allow setting an ID for the module's GS key

src/modules/packagechooser/PackageChooserViewStep.cpp

@@ -149,7 +149,6 @@ PackageChooserViewStep::jobs() const
 void
 PackageChooserViewStep::setConfigurationMap( const QVariantMap& configurationMap )
 {
-    // TODO: use the configurationMap
     QString mode = CalamaresUtils::getString( configurationMap, "mode" );
     bool ok = false;
     if ( !mode.isEmpty() )
@@ -161,6 +160,9 @@ PackageChooserViewStep::setConfigurationMap( const QVariantMap& configurationMap
         m_mode = PackageChooserMode::Required;
     }
     
+    m_id = CalamaresUtils::getString( configurationMap, "id" );
+    
+    // TODO: replace this hard-coded model
     if ( !m_model )
     {
 

src/modules/packagechooser/PackageChooserViewStep.h

@@ -60,7 +60,10 @@ private:
 
     PackageChooserPage* m_widget;
     PackageListModel* m_model;
+    
+    // Configuration
     PackageChooserMode m_mode;
+    QString m_id;
 };
 
 CALAMARES_PLUGIN_FACTORY_DECLARATION( PackageChooserViewStepFactory )

src/modules/packagechooser/packagechooser.conf

@@ -1,5 +1,14 @@
 # Configuration for the low-density software chooser
 ---
+# The packagechooser writes a GlobalStorage value for the choice that
+# has been made. The key is *packagechooser_<id>*. If *id* is set here,
+# it is substituted into the key name. If it is not set, the module's
+# instance name is used; see the *instances* section of `settings.conf`.
+# If there is just one packagechooser module, and no *id* is set,
+# resulting GS key is probably *packagechooser_packagechooser*.
+#
+# id: ""
+
 # Software selection mode, to set whether the software packages
 # can be chosen singly, or multiply.
 #