Relative paths for includes in package index files

Plus: inhibt some deferred methods during processEvent (i.e. progress reporting,
HTTP/HTTPS download).

src/lay/lay/layApplication.cc

@@ -1371,7 +1371,11 @@ Application::process_events (QEventLoop::ProcessEventsFlags flags, bool silent)
 #endif
 
     mp_mw->enter_busy_mode (true);
-    QApplication::processEvents (flags);
+    try {
+      QApplication::processEvents (flags);
+    } catch (...) {
+      //  ignore exceptions
+    }
     mp_mw->enter_busy_mode (false);
 
     if (silent) {

src/lay/lay/layProgress.cc

@@ -190,6 +190,9 @@ ProgressReporter::update_and_yield ()
 void
 ProgressReporter::process_events ()
 {
+  //  Don't execute deferred methods during progress handling (undesired side effects)
+  tl::NoDeferredMethods silent;
+
   if (m_pw_visible && lay::MainWindow::instance () && QApplication::instance ()) {
     QApplication::instance ()->processEvents (QEventLoop::AllEvents);
   }

src/lay/lay/laySaltDownloadManager.cc

@@ -371,6 +371,7 @@ SaltDownloadManager::execute (lay::SaltManagerDialog *parent, lay::Salt &salt)
     dialog->setModal (true);
     dialog->show ();
 
+    //  TODO: should not waste CPU time in processEvents loop.
     while (! dialog->is_confirmed ()) {
       QCoreApplication::processEvents (QEventLoop::AllEvents | QEventLoop::WaitForMoreEvents, 100);
       if (dialog->is_cancelled () || ! dialog->isVisible ()) {

src/lay/lay/laySaltGrains.cc

@@ -28,6 +28,7 @@
 #include <QDir>
 #include <QFileInfo>
 #include <QResource>
+#include <QUrl>
 
 namespace lay
 {
@@ -245,6 +246,8 @@ static tl::XMLStruct<lay::SaltGrains> s_xml_struct ("salt-mine", s_group_struct)
 void
 SaltGrains::load (const std::string &p)
 {
+  m_url = p;
+
   tl::XMLFileSource source (p);
   s_xml_struct.parse (source, *this);
 }
@@ -252,14 +255,33 @@ SaltGrains::load (const std::string &p)
 void
 SaltGrains::load (tl::InputStream &p)
 {
+  m_url.clear ();
+
   tl::XMLStreamSource source (p);
   s_xml_struct.parse (source, *this);
 }
 
 void
-SaltGrains::include (const std::string &src)
+SaltGrains::include (const std::string &src_in)
 {
-  if (! src.empty ()) {
+  if (! src_in.empty ()) {
+
+    std::string src = src_in;
+
+    //  base relative URL's on the parent URL
+    if (!m_url.empty () && src.find ("http:") != 0 && src.find ("https:") != 0 && src.find ("file:") != 0 && !src.empty() && src[0] != '/' && src[0] != '\\') {
+
+      //  replace the last component ("repository.xml") by the given path
+      QUrl url (tl::to_qstring (m_url));
+      QStringList path_comp = url.path ().split (QString::fromUtf8 ("/"));
+      if (!path_comp.isEmpty ()) {
+        path_comp.back () = tl::to_qstring (src);
+      }
+      url.setPath (path_comp.join (QString::fromUtf8 ("/")));
+
+      src = tl::to_string (url.toString ());
+
+    }
 
     if (tl::verbosity () >= 20) {
       tl::log << "Including package index from " << src;

src/lay/lay/laySaltGrains.h

@@ -210,6 +210,7 @@ private:
   std::string m_path;
   collections_type m_collections;
   grains_type m_grains;
+  std::string m_url;
 };
 
 }

src/tl/tl/tlHttpStream.cc

@@ -23,6 +23,7 @@
 
 #include "tlHttpStream.h"
 #include "tlStaticObjects.h"
+#include "tlDeferredExecution.h"
 
 #include "ui_PasswordDialog.h"
 
@@ -185,6 +186,9 @@ InputHttpStream::issue_request (const QUrl &url)
 size_t 
 InputHttpStream::read (char *b, size_t n)
 {
+  //  Prevents deferred methods to be executed during the processEvents below (undesired side effects)
+  tl::NoDeferredMethods silent;
+
   if (mp_reply == 0) {
     issue_request (QUrl (tl::to_qstring (m_url)));
   }