Add extra Qt plugins manually (#152)

Added posibility for developer to deploy aditional Qt plugins through a
list of plugins directories and plugins, relative path to the Qt plugins
directory

tools/linuxdeployqt/main.cpp

@@ -47,16 +47,20 @@ int main(int argc, char **argv)
         qDebug() << "Usage: linuxdeployqt <app-binary|desktop file> [options]";
         qDebug() << "";
         qDebug() << "Options:";
-        qDebug() << "   -verbose=<0-3>      : 0 = no output, 1 = error/warning (default), 2 = normal, 3 = debug";
+        qDebug() << "   -verbose=<0-3>         : 0 = no output, 1 = error/warning (default),";
+        qDebug() << "                            2 = normal, 3 = debug";
         qDebug() << "   -no-plugins            : Skip plugin deployment";
         qDebug() << "   -appimage              : Create an AppImage (implies -bundle-non-qt-libs)";
         qDebug() << "   -no-strip              : Don't run 'strip' on the binaries";
         qDebug() << "   -bundle-non-qt-libs    : Also bundle non-core, non-Qt libraries";
-        qDebug() << "   -executable=<path>  : Let the given executable use the deployed libraries too";
+        qDebug() << "   -executable=<path>     : Let the given executable use the deployed libraries";
+        qDebug() << "                            too";
         qDebug() << "   -qmldir=<path>         : Scan for QML imports in the given path";
         qDebug() << "   -always-overwrite      : Copy files even if the target file exists";
         qDebug() << "   -qmake=<path>          : The qmake executable to use";
         qDebug() << "   -no-translations       : Skip deployment of translations.";
+        qDebug() << "   -extra-plugins=<list>  : List of extra plugins which should be deployed,";
+        qDebug() << "                            separated by comma.";
         qDebug() << "";
         qDebug() << "linuxdeployqt takes an application as input and makes it";
         qDebug() << "self-contained by copying in the Qt libraries and plugins that";
@@ -173,13 +177,14 @@ int main(int argc, char **argv)
     extern bool bundleAllButCoreLibs;
     extern bool fhsLikeMode;
     extern QString fhsPrefix;
-    extern bool alwaysOwerwriteEnabled;
     extern QStringList librarySearchPath;
+    extern bool alwaysOwerwriteEnabled;    
     QStringList additionalExecutables;
     bool qmldirArgumentUsed = false;
     bool skipTranslations = false;
     QStringList qmlDirs;
     QString qmakeExecutable;
+    extern QStringList extraQtPlugins;
 
     /* FHS-like mode is for an application that has been installed to a $PREFIX which is otherwise empty, e.g., /path/to/usr.
      * In this case, we want to construct an AppDir in /path/to. */
@@ -381,6 +386,10 @@ int main(int argc, char **argv)
         } else if (argument == QByteArray("-no-translations")) {
             LogDebug() << "Argument found:" << argument;
             skipTranslations = true;
+        } else if (argument.startsWith("-extra-plugins=")) {
+            LogDebug() << "Argument found:" << argument;
+            int index = argument.indexOf("=");
+            extraQtPlugins = QString(argument.mid(index+1)).split(",");
         } else if (argument.startsWith("-")) {
             LogError() << "Unknown argument" << argument << "\n";
             return 1;

tools/linuxdeployqt/shared.cpp

@@ -57,6 +57,7 @@ int logLevel = 1;
 int qtDetected = 0;
 bool qtDetectionComplete = 0; // As long as Qt is not detected yet, ldd may encounter "not found" messages, continue anyway
 bool deployLibrary = false;
+QStringList extraQtPlugins;
 
 using std::cout;
 using std::endl;
@@ -1336,6 +1337,36 @@ void deployPlugins(const AppDirInfo &appDirInfo, const QString &pluginSourcePath
         recursiveCopy(sourcePath, destinationPath);
     }
 
+    if (!extraQtPlugins.isEmpty()) {
+        LogNormal() << "Deploying extra plugins.";
+        foreach (const QString &plugin, extraQtPlugins) {
+            QDir pluginDirectory(pluginSourcePath + "/" + plugin);
+            if (pluginDirectory.exists()) {
+                //If it is a plugin directory we will deploy the entire directory
+                QStringList plugins = pluginDirectory.entryList(QStringList() << QStringLiteral("*.so"));
+                foreach (const QString &pluginFile, plugins) {
+                    pluginList.append(plugin + "/" + pluginFile);
+                    LogDebug() << plugin + "/" + pluginFile << "appended";
+                }
+            }
+            else {
+                //If it isn't a directory we asume it is an explicit plugin and we will try to deploy that
+                if (!pluginList.contains(plugin)) {
+                    if (QFile::exists(pluginSourcePath + "/" + plugin)) {
+                        pluginList.append(plugin);
+                        LogDebug() << plugin << "appended";
+                    }
+                    else {
+                        LogDebug() << "The plugin" << plugin << "was already deployed." ;
+                    }
+                }
+                else {
+                    LogWarning() << "The plugin" << pluginSourcePath + "/" + plugin << "could not be found. Please check spelling and try again!";
+                }
+            }
+        }
+    }
+
     LogNormal() << "pluginList after having detected hopefully all required plugins:" << pluginList;
 
     foreach (const QString &plugin, pluginList) {

tools/linuxdeployqt/shared.h

@@ -45,6 +45,7 @@ extern bool runStripEnabled;
 extern bool bundleAllButCoreLibs;
 extern bool fhsLikeMode;
 extern QString fhsPrefix;
+extern QStringList extraQtPlugins;
 
 class LibraryInfo
 {