[netinstall] Move package-listing wrangling to the Config object

Now all the business logic is in Config, the door is open to
building a QML-ified netinstall module. I'm not sure that
would be worth it: packagechooser offers more space for a
nice UI and should be QML'ed first.

src/modules/netinstall/Config.cpp

@@ -15,6 +15,7 @@
 #include "GlobalStorage.h"
 #include "JobQueue.h"
 #include "network/Manager.h"
+#include "packages/Globals.h"
 #include "utils/Logger.h"
 #include "utils/RAII.h"
 #include "utils/Retranslator.h"
@@ -25,12 +26,13 @@
 
 Config::Config( QObject* parent )
     : QObject( parent )
-    , m_model( new PackageModel( this ) ) { CALAMARES_RETRANSLATE_SLOT( &Config::retranslate ) }
-
-    Config::~Config()
+    , m_model( new PackageModel( this ) )
 {
+    CALAMARES_RETRANSLATE_SLOT( &Config::retranslate );
 }
 
+Config::~Config() {}
+
 void
 Config::retranslate()
 {
@@ -238,3 +240,29 @@ Config::setConfigurationMap( const QVariantMap& configurationMap )
         }
     }
 }
+
+void
+Config::finalizeGlobalStorage( const Calamares::ModuleSystem::InstanceKey& key )
+{
+    auto packages = model()->getPackages();
+
+    // This netinstall module may add two sub-steps to the packageOperations,
+    // one for installing and one for try-installing.
+    QVariantList installPackages;
+    QVariantList tryInstallPackages;
+
+    for ( const auto& package : packages )
+    {
+        if ( package->isCritical() )
+        {
+            installPackages.append( package->toOperation() );
+        }
+        else
+        {
+            tryInstallPackages.append( package->toOperation() );
+        }
+    }
+
+    CalamaresUtils::Packages::setGSPackageAdditions(
+        Calamares::JobQueue::instance()->globalStorage(), key, installPackages, tryInstallPackages );
+}

src/modules/netinstall/Config.h

@@ -15,6 +15,7 @@
 #include "PackageModel.h"
 
 #include "locale/TranslatableConfiguration.h"
+#include "modulesystem/InstanceKey.h"
 
 #include <QObject>
 #include <QQueue>
@@ -74,6 +75,12 @@ public:
      */
     void loadGroupList( const QVariantList& groupData );
 
+    /** @brief Write the selected package lists to global storage
+     *
+     * Since the config doesn't know what module it is for,
+     * pass in an instance key.
+     */
+    void finalizeGlobalStorage( const Calamares::ModuleSystem::InstanceKey& key );
 
 signals:
     void statusChanged( QString status );  ///< Something changed

src/modules/netinstall/NetInstallViewStep.cpp

@@ -11,11 +11,6 @@
 
 #include "NetInstallViewStep.h"
 
-#include "JobQueue.h"
-#include "packages/Globals.h"
-#include "utils/Logger.h"
-#include "utils/Variant.h"
-
 #include "NetInstallPage.h"
 
 CALAMARES_PLUGIN_FACTORY_DEFINITION( NetInstallViewStepFactory, registerPlugin< NetInstallViewStep >(); )
@@ -125,27 +120,7 @@ NetInstallViewStep::onActivate()
 void
 NetInstallViewStep::onLeave()
 {
-    auto packages = m_config.model()->getPackages();
-
-    // This netinstall module may add two sub-steps to the packageOperations,
-    // one for installing and one for try-installing.
-    QVariantList installPackages;
-    QVariantList tryInstallPackages;
-
-    for ( const auto& package : packages )
-    {
-        if ( package->isCritical() )
-        {
-            installPackages.append( package->toOperation() );
-        }
-        else
-        {
-            tryInstallPackages.append( package->toOperation() );
-        }
-    }
-
-    CalamaresUtils::Packages::setGSPackageAdditions(
-        Calamares::JobQueue::instance()->globalStorage(), moduleInstanceKey(), installPackages, tryInstallPackages );
+    m_config.finalizeGlobalStorage( moduleInstanceKey() );
 }
 
 void