Drop the (inter-)module dependencies system.

- Was marked incomplete and unused; none of the existing modules
   set any requirements, and the descriptors are not set up to
   hold the requirements information anyway.
 - Dependencies are generally through globalStorage values, or if
   there are dependent jobs they should be created in-order by one
   source (e.g. though a View or a subclass of CppJob which overrides
   jobs() ).
 - It is the responsibility of deployers to formulate a settings.conf
   that includes all the required modules.
 - A 'real' dependency system is going to lead to the introduction
   of interface-definitions and a great deal of complexity, for a
   use case that can be handled with careful deployment instead.

src/libcalamaresui/modulesystem/Module.cpp

@@ -233,13 +233,6 @@ Module::instanceKey() const
 }
 
 
-QStringList
-Module::requiredModules() const
-{
-    return m_requiredModules;
-}
-
-
 QString
 Module::location() const
 {

src/libcalamaresui/modulesystem/Module.h

@@ -106,13 +106,6 @@ public:
      */
     virtual QString instanceKey() const final;
 
-    /**
-     * @brief requiredModules a list of names of modules required by this one.
-     * @return the list of names.
-     * The module dependencies system is currently incomplete and unused.
-     */
-    virtual QStringList requiredModules() const;
-
     /**
      * @brief location returns the full path of this module's directory.
      * @return the path.
@@ -176,8 +169,8 @@ protected:
 
 private:
     void loadConfigurationFile( const QString& configFileName ); //throws YAML::Exception
+
     QString m_name;
-    QStringList m_requiredModules;
     QString m_directory;
     QString m_instanceId;
 

src/libcalamaresui/modulesystem/ModuleManager.cpp

@@ -150,9 +150,6 @@ ModuleManager::doInit()
             cDebug() << "ModuleManager bad search path" << path;
         }
     }
-    // At this point m_availableModules is filled with whatever was found in the
-    // search paths.
-    checkDependencies();
     emit initDone();
 }
 
@@ -318,35 +315,4 @@ ModuleManager::loadModules()
     } );
 }
 
-
-void
-ModuleManager::checkDependencies()
-{
-    // This goes through the map of available modules, and deletes those whose
-    // dependencies are not met, if any.
-    bool somethingWasRemovedBecauseOfUnmetDependencies = false;
-    forever
-    {
-        for ( auto it = m_availableDescriptorsByModuleName.begin();
-              it != m_availableDescriptorsByModuleName.end(); ++it )
-        {
-            foreach ( const QString& depName,
-                      (*it).value( "requiredModules" ).toStringList() )
-            {
-                if ( !m_availableDescriptorsByModuleName.contains( depName ) )
-                {
-                    somethingWasRemovedBecauseOfUnmetDependencies = true;
-                    m_availableDescriptorsByModuleName.erase( it );
-                    break;
-                }
-            }
-            if ( somethingWasRemovedBecauseOfUnmetDependencies )
-                break;
-        }
-        if ( !somethingWasRemovedBecauseOfUnmetDependencies )
-            break;
-    }
-}
-
-
-}
+}  // namespace

src/libcalamaresui/modulesystem/ModuleManager.h

@@ -88,8 +88,6 @@ private slots:
     void doInit();
 
 private:
-    void checkDependencies();
-
     QMap< QString, QVariantMap > m_availableDescriptorsByModuleName;
     QMap< QString, QString > m_moduleDirectoriesByModuleName;
     QMap< QString, Module* > m_loadedModulesByInstanceKey;