Abort installation when a job fails

src/libcalamares/JobQueue.cpp

@@ -46,7 +46,12 @@ public:
         for( auto job : m_jobs )
         {
             emitProgress( current, total, job->prettyName() );
-            job->exec();
+            JobResult result = job->exec();
+            if ( !result )
+            {
+                emitFailed( result.message(), result.details() );
+                return;
+            }
             ++current;
         }
         emitProgress( total, total, QString() );
@@ -64,6 +69,14 @@ private:
             Q_ARG( QString, prettyName )
         );
     }
+
+    void emitFailed( const QString& message, const QString& details )
+    {
+        QMetaObject::invokeMethod( m_queue, "failed", Qt::QueuedConnection,
+            Q_ARG( QString, message ),
+            Q_ARG( QString, details )
+        );
+    }
 };
 
 

src/libcalamares/JobQueue.h

@@ -43,6 +43,7 @@ public:
 
 signals:
     void progress( int current, int total, const QString& prettyName );
+    void failed( const QString& message, const QString& details );
 
 private:
     static JobQueue* s_instance;

src/libcalamaresui/ViewManager.cpp

@@ -23,8 +23,8 @@
 #include "JobQueue.h"
 
 #include <QApplication>
-#include <QLabel>
 #include <QBoxLayout>
+#include <QMessageBox>
 
 namespace Calamares
 {
@@ -194,11 +194,37 @@ ViewManager::back()
 void
 ViewManager::startInstallation()
 {
+    JobQueue* queue = JobQueue::instance();
     for( ViewStep* step : m_prepareSteps )
     {
-        JobQueue::instance()->enqueue( step->jobs() );
+        queue->enqueue( step->jobs() );
     }
-    JobQueue::instance()->start();
+    connect( queue, &JobQueue::failed, this, &ViewManager::onInstallationFailed );
+    queue->start();
+}
+
+void
+ViewManager::onInstallationFailed( const QString& message, const QString& details )
+{
+    QString text = tr(
+        "<p><b>Installation Failed</b></p>"
+        "<p>%1</p>"
+        ).arg( message );
+
+    if ( !details.isEmpty() )
+    {
+        text += tr(
+            "<p>%1</p>"
+            ).arg( details );
+    }
+
+    QMessageBox::critical(
+        QApplication::activeWindow(),
+        tr( "Error" ),
+        text,
+        QMessageBox::Close
+    );
+    QApplication::quit();
 }
 
 }

src/libcalamaresui/ViewManager.h

@@ -73,6 +73,7 @@ private:
 
     void insertViewStep( int before, ViewStep* step );
     void startInstallation();
+    void onInstallationFailed( const QString& message, const QString& details );
 };
 
 }