[calamares] Refactor searching for branding descriptor

src/calamares/CalamaresApplication.cpp

@@ -172,6 +172,27 @@ settingsFileCandidates( bool assumeBuilddir )
 }
 
 
+static QStringList
+brandingFileCandidates( bool assumeBuilddir, const QString& brandingFilename )
+{
+    QStringList brandingPaths;
+    if ( CalamaresUtils::isAppDataDirOverridden() )
+        brandingPaths << CalamaresUtils::appDataDir().absoluteFilePath( brandingFilename );
+    else
+    {
+        if ( assumeBuilddir )
+        {
+            brandingPaths << ( QDir::currentPath() + QStringLiteral( "/src/" ) + brandingFilename );
+            brandingPaths << QDir( CMAKE_INSTALL_FULL_SYSCONFDIR "/calamares/" )
+                                                 .absoluteFilePath( brandingFilename );
+            brandingPaths << CalamaresUtils::appDataDir().absoluteFilePath( brandingFilename);
+        }
+    }
+
+    return brandingPaths;
+}
+
+
 void
 CalamaresApplication::initQmlPath()
 {
@@ -250,59 +271,32 @@ CalamaresApplication::initBranding()
         ::exit( EXIT_FAILURE );
     }
 
-    QString brandingDescriptorSubpath = QString( "branding/%1/branding.desc" )
-                                        .arg( brandingComponentName );
+    QString brandingDescriptorSubpath = QString( "branding/%1/branding.desc" ).arg( brandingComponentName );
+    QStringList brandingFileCandidatesByPriority = brandingFileCandidates( isDebug(), brandingDescriptorSubpath);
 
     QFileInfo brandingFile;
-    if ( CalamaresUtils::isAppDataDirOverridden() )
+    bool found = false;
+
+    foreach ( const QString& path, brandingFileCandidatesByPriority )
     {
-        brandingFile = QFileInfo( CalamaresUtils::appDataDir()
-                                  .absoluteFilePath( brandingDescriptorSubpath ) );
-        if ( !brandingFile.exists() || !brandingFile.isReadable() )
+        QFileInfo pathFi( path );
+        if ( pathFi.exists() && pathFi.isReadable() )
         {
-            cError() << "FATAL: explicitly configured application data directory"
-                   << CalamaresUtils::appDataDir().absolutePath()
-                   << "does not contain a valid branding component descriptor at"
-                   << brandingFile.absoluteFilePath()
-                   << "\nCowardly refusing to continue startup without branding.";
-            ::exit( EXIT_FAILURE );
+            brandingFile = pathFi;
+            found = true;
+            break;
         }
     }
-    else
-    {
-        QStringList brandingFileCandidatesByPriority;
-        if ( isDebug() )
-        {
-            brandingFileCandidatesByPriority.append(
-                QDir::currentPath() +
-                QDir::separator() +
-                "src" +
-                QDir::separator() +
-                brandingDescriptorSubpath );
-        }
-        brandingFileCandidatesByPriority.append( QDir( CMAKE_INSTALL_FULL_SYSCONFDIR "/calamares/" )
-                                                 .absoluteFilePath( brandingDescriptorSubpath ) );
-        brandingFileCandidatesByPriority.append( CalamaresUtils::appDataDir()
-                                                 .absoluteFilePath( brandingDescriptorSubpath ) );
-
-        foreach ( const QString& path, brandingFileCandidatesByPriority )
-        {
-            QFileInfo pathFi( path );
-            if ( pathFi.exists() && pathFi.isReadable() )
-            {
-                brandingFile = pathFi;
-                break;
-            }
-        }
 
-        if ( !brandingFile.exists() || !brandingFile.isReadable() )
-        {
-            cError() << "FATAL: none of the expected branding descriptor file paths ("
-                   << brandingFileCandidatesByPriority.join( ", " )
-                   << ") contain a valid branding.desc file."
-                   << "\nCowardly refusing to continue startup without branding.";
-            ::exit( EXIT_FAILURE );
-        }
+    if ( !found || !brandingFile.exists() || !brandingFile.isReadable() )
+    {
+        cError() << "Cowardly refusing to continue startup without branding."
+            << Logger::DebugList( brandingFileCandidatesByPriority );
+        if ( CalamaresUtils::isAppDataDirOverridden() )
+            cError() << "FATAL: explicitly configured application data directory is missing" << brandingComponentName;
+        else
+            cError() << "FATAL: none of the expected branding descriptor file paths exist.";
+        ::exit( EXIT_FAILURE );
     }
 
     new Calamares::Branding( brandingFile.absoluteFilePath(), this );