Block the install process if an entry is required but unsatisfied.

src/modules/prepare/PreparePage.cpp

@@ -47,11 +47,11 @@ PreparePage::PreparePage( QWidget* parent )
 
 
 void
-PreparePage::init( const QList< QPair< QString, bool > > &checkEntries )
+PreparePage::init( const QList< PrepareEntry >& checkEntries )
 {
-    for ( const QPair< QString, bool >& entry : checkEntries )
+    for ( const PrepareEntry& entry : checkEntries )
     {
-        PrepareCheckWidget* pcw = new PrepareCheckWidget( entry.first, entry.second );
+        PrepareCheckWidget* pcw = new PrepareCheckWidget( entry.text, entry.checked );
         m_entriesLayout->addWidget( pcw );
         pcw->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Preferred );
     }

src/modules/prepare/PreparePage.h

@@ -19,6 +19,8 @@
 #ifndef PREPAREPAGE_H
 #define PREPAREPAGE_H
 
+#include "PrepareViewStep.h"
+
 #include <QBoxLayout>
 #include <QWidget>
 
@@ -28,7 +30,7 @@ class PreparePage : public QWidget
 public:
     explicit PreparePage( QWidget* parent = nullptr );
 
-    void init( const QList< QPair< QString, bool > >& checkEntries );
+    void init( const QList< PrepareEntry >& checkEntries );
 
 private:
     QBoxLayout* m_entriesLayout;

src/modules/prepare/PrepareViewStep.cpp

@@ -82,43 +82,82 @@ PrepareViewStep::PrepareViewStep( QObject* parent )
     connect( timer, &QTimer::timeout,
              [=]()
     {
-        bool enoughStorage, enoughRam, hasPower, hasInternet;
+        bool enoughStorage = false;
+        bool enoughRam = false;
+        bool hasPower = false;
+        bool hasInternet = false;
 
         qint64 requiredStorageB = m_requiredStorageGB * 1073741824L; /*powers of 2*/
         cDebug() << "Need at least storage bytes:" << requiredStorageB;
+        if ( m_entriesToCheck.contains( "storage" ) )
             enoughStorage = checkEnoughStorage( requiredStorageB );
 
         qint64 requiredRamB = m_requiredRamGB * 1073741824L; /*powers of 2*/
         cDebug() << "Need at least ram bytes:" << requiredRamB;
+        if ( m_entriesToCheck.contains( "ram" ) )
             enoughRam = checkEnoughRam( requiredRamB );
 
+        if ( m_entriesToCheck.contains( "power" ) )
             hasPower = checkHasPower();
+
+        if ( m_entriesToCheck.contains( "internet" ) )
             hasInternet = checkHasInternet();
+
         cDebug() << "enoughStorage, enoughRam, hasPower, hasInternet: "
                  << enoughStorage << enoughRam << hasPower << hasInternet;
 
-        QList< QPair< QString, bool > > checkEntries;
-        checkEntries.append( qMakePair(
+        QList< PrepareEntry > checkEntries;
+        foreach ( const QString& entry, m_entriesToCheck )
+        {
+            if ( entry == "storage" )
+                checkEntries.append( {
+                    entry,
                     tr( "has at least %1 GB available drive space" )
                         .arg( m_requiredStorageGB ),
-            enoughStorage ) );
-        checkEntries.append( qMakePair(
+                    enoughStorage,
+                    m_entriesToRequire.contains( entry )
+                } );
+            else if ( entry == "ram" )
+                checkEntries.append( {
+                    entry,
                     tr( "has at least %1 GB working memory" )
                         .arg( m_requiredRamGB ),
-            enoughRam ) );
-        checkEntries.append( qMakePair(
+                    enoughRam,
+                    m_entriesToRequire.contains( entry )
+                } );
+            else if ( entry == "power" )
+                checkEntries.append( {
+                    entry,
                     tr( "is plugged in to a power source" ),
-            hasPower ) );
-        checkEntries.append( qMakePair(
+                    hasPower,
+                    m_entriesToRequire.contains( entry )
+                } );
+            else if ( entry == "internet" )
+                checkEntries.append( {
+                    entry,
                     tr( "is connected to the Internet" ),
-            hasInternet ) );
+                    hasInternet,
+                    m_entriesToRequire.contains( entry )
+                } );
+        }
 
         m_actualWidget->init( checkEntries );
         m_widget->layout()->removeWidget( waitingWidget );
         waitingWidget->deleteLater();
         m_widget->layout()->addWidget( m_actualWidget );
-        m_nextEnabled = true;
+
+        bool canGoNext = true;
+        foreach ( const PrepareEntry& entry, checkEntries )
+        {
+            if ( !entry.checked && entry.required )
+            {
+                canGoNext = false;
+                break;
+            }
+        }
+        m_nextEnabled = canGoNext;
         emit nextStatusChanged( m_nextEnabled );
+
         timer->deleteLater();
     } );
     timer->start( 0 );
@@ -222,6 +261,20 @@ PrepareViewStep::setConfigurationMap( const QVariantMap& configurationMap )
     {
         m_requiredRamGB = 1.;
     }
+
+    if ( configurationMap.contains( "check" ) &&
+         configurationMap.value( "check" ).type() == QVariant::List )
+    {
+        m_entriesToCheck.clear();
+        m_entriesToCheck.append( configurationMap.value( "check" ).toStringList() );
+    }
+
+    if ( configurationMap.contains( "required" ) &&
+         configurationMap.value( "required" ).type() == QVariant::List )
+    {
+        m_entriesToRequire.clear();
+        m_entriesToRequire.append( configurationMap.value( "required" ).toStringList() );
+    }
 }
 
 

src/modules/prepare/PrepareViewStep.h

@@ -20,12 +20,21 @@
 #define PREPAREPAGEPLUGIN_H
 
 #include <QObject>
+#include <QStringList>
 
 #include "viewpages/ViewStep.h"
 #include "PluginDllMacro.h"
 
 class PreparePage;
 
+struct PrepareEntry
+{
+    QString name;
+    QString text;
+    bool checked;
+    bool required;
+};
+
 class PLUGINDLLEXPORT PrepareViewStep : public Calamares::ViewStep
 {
     Q_OBJECT
@@ -56,6 +65,9 @@ public:
     void setConfigurationMap( const QVariantMap& configurationMap ) override;
 
 private:
+    QStringList m_entriesToCheck;
+    QStringList m_entriesToRequire;
+
     bool checkEnoughStorage( qint64 requiredSpace );
     bool checkEnoughRam( qint64 requiredRam );
     bool checkBatteryExists();

src/modules/prepare/prepare.conf

@@ -1,3 +1,11 @@
 ---
 requiredStorage:    5.5
 requiredRam:        2.0
+check:
+    - storage
+    - ram
+    - power
+    - internet
+required:
+    - storage
+    - ram