Display progress for loading component install scripts

Also process pending events for the main thread in the loop that calls
Component::loadComponentScript() repeatedly, to not block the UI while
busy loading the scripts.

Task-number: QTIFW-2701
Change-Id: I4a1dd8e2441e21b5075b6fdffff8a47cd4bc7c80
Reviewed-by: Katja Marttila <katja.marttila@qt.io>

1 files changed, 26 insertions, 4 deletions

diff --git a/src/libs/installer/packagemanagercore_p.cpp b/src/libs/installer/packagemanagercore_p.cpp
index 5e4ee6ffb..1d4302e12 100644
--- a/src/libs/installer/packagemanagercore_p.cpp
+++ b/src/libs/installer/packagemanagercore_p.cpp
@@ -402,10 +402,9 @@ bool PackageManagerCorePrivate::buildComponentTree(QHash<QString, Component*> &c
 
         // after everything is set up, load the scripts if needed and create helper hashes
         // for autodependency and dependency components for quicker search later
-        foreach (QInstaller::Component *component, components) {
-            if (loadScript)
-                component->loadComponentScript();
-        }
+        if (loadScript && !loadComponentScripts(components))
+            return false;
+
         // now we can preselect components in the tree
         foreach (QInstaller::Component *component, components) {
             // set the checked state for all components without child (means without tristate)
@@ -458,6 +457,29 @@ bool PackageManagerCorePrivate::buildComponentTree(QHash<QString, Component*> &c
     return true;
 }
 
+template <typename T>
+bool PackageManagerCorePrivate::loadComponentScripts(const T &components)
+{
+    infoMessage(nullptr, tr("Loading component scripts..."));
+
+    quint64 loadedComponents = 0;
+    for (auto *component : components) {
+        if (statusCanceledOrFailed())
+            return false;
+
+        component->loadComponentScript();
+        ++loadedComponents;
+
+        const int currentProgress = qRound(double(loadedComponents) / components.count() * 100);
+        infoProgress(nullptr, currentProgress, 100);
+        qApp->processEvents();
+    }
+    return true;
+}
+
+template bool PackageManagerCorePrivate::loadComponentScripts<QList<Component *>>(const QList<Component *> &);
+template bool PackageManagerCorePrivate::loadComponentScripts<QHash<QString, Component *>>(const QHash<QString, Component *> &);
+
 void PackageManagerCorePrivate::cleanUpComponentEnvironment()
 {
     m_componentReplaces.clear();