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>

3 files changed, 36 insertions, 7 deletions

diff --git a/src/libs/installer/packagemanagercore.cpp b/src/libs/installer/packagemanagercore.cpp
index ae87b96f0..d85ed8c47 100644
--- a/src/libs/installer/packagemanagercore.cpp
+++ b/src/libs/installer/packagemanagercore.cpp
@@ -4262,21 +4262,25 @@ bool PackageManagerCore::fetchUpdaterPackages(const PackagesList &remotes, const
             }
 
             // after everything is set up, load the scripts
+            if (!d->loadComponentScripts(components))
+                return false;
+
             foreach (QInstaller::Component *component, components) {
                 if (d->statusCanceledOrFailed())
                     return false;
 
-                component->loadComponentScript();
                 if (!component->isUnstable() && component->autoDependencies().isEmpty())
                     component->setCheckState(Qt::Checked);
             }
 
+            // even for possible dependencies we need to load the scripts for example to get archives
+            if (!d->loadComponentScripts(d->m_updaterComponentsDeps))
+                return false;
+
             // after everything is set up, check installed components
             foreach (QInstaller::Component *component, d->m_updaterComponentsDeps) {
                 if (d->statusCanceledOrFailed())
                     return false;
-                // even for possible dependency we need to load the script for example to get archives
-                component->loadComponentScript();
                 if (component->isInstalled() && !component->autoDependencies().isEmpty()) {
                     // since we do not put them into the model, which would force a update of e.g. tri state
                     // components, we have to check all installed components ourselves
diff --git a/src/libs/installer/packagemanagercore_p.cpp b/src/libs/installer/packagemanagercore_p.cpp
index 66630b98d..2d61a351a 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();
diff --git a/src/libs/installer/packagemanagercore_p.h b/src/libs/installer/packagemanagercore_p.h
index 24782b598..0ce081774 100644
--- a/src/libs/installer/packagemanagercore_p.h
+++ b/src/libs/installer/packagemanagercore_p.h
@@ -106,6 +106,9 @@ public:
 
     bool buildComponentTree(QHash<QString, Component*> &components, bool loadScript);
 
+    template <typename T>
+    bool loadComponentScripts(const T &components);
+
     void cleanUpComponentEnvironment();
     ScriptEngine *componentScriptEngine() const;
     ScriptEngine *controlScriptEngine() const;