qqmlimport: Log when no qmldir file is found

Also log when it is found, with the path where it is found.

As a drive-by, add a 'version' label before printing the version of an
imported library. In a static build where some libraries end up with a
version set to 'invalid', it's clearer that the version is invalid,
and not the library.

Change-Id: I998776b13bfe98f1668790419f1102e081878c99
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
(cherry picked from commit 22b69dae253981b67124fc38adab666eb2d750be)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

2 files changed, 15 insertions, 2 deletions

diff --git a/src/qml/qml/qqmlimport.cpp b/src/qml/qml/qqmlimport.cpp
index 3967ccc970..58ffb8c3a1 100644
--- a/src/qml/qml/qqmlimport.cpp
+++ b/src/qml/qml/qqmlimport.cpp
@@ -1637,7 +1637,7 @@ QTypeRevision QQmlImports::addLibraryImport(
 
     qCDebug(lcQmlImport)
             << "addLibraryImport:" << qPrintable(baseUrl().toString())
-            << uri << version << "as" << prefix;
+            << uri << "version '" << version << "'" << "as" << prefix;
 
     return d->addLibraryImport(uri, prefix, version, qmldirIdentifier, qmldirUrl, flags,
                                importDb, errors);
diff --git a/src/qml/qml/qqmlimport_p.h b/src/qml/qml/qqmlimport_p.h
index 5ebd7f2a2e..ba0b6286fd 100644
--- a/src/qml/qml/qqmlimport_p.h
+++ b/src/qml/qml/qqmlimport_p.h
@@ -42,6 +42,7 @@
 
 #include <QtCore/qurl.h>
 #include <QtCore/qcoreapplication.h>
+#include <QtCore/qloggingcategory.h>
 #include <QtCore/qset.h>
 #include <QtCore/qstringlist.h>
 #include <QtQml/qqmlengine.h>
@@ -73,6 +74,8 @@ class QQmlImportDatabase;
 class QQmlTypeLoader;
 class QQmlTypeLoaderQmldirContent;
 
+const QLoggingCategory &lcQmlImport();
+
 namespace QQmlImport {
     enum RecursionRestriction { PreventRecursion, AllowRecursion };
 }
@@ -320,6 +323,7 @@ QQmlImportDatabase::LocalQmldirResult QQmlImportDatabase::locateLocalQmldir(
     const QStringList qmlDirPaths = QQmlImports::completeQmldirPaths(
                 uri, localImportPaths, version);
 
+    QString qmldirAbsoluteFilePath;
     for (QString qmldirPath : qmlDirPaths) {
         if (hasInterceptors) {
             const QUrl intercepted = engine->interceptUrl(
@@ -333,7 +337,7 @@ QQmlImportDatabase::LocalQmldirResult QQmlImportDatabase::locateLocalQmldir(
             }
         }
 
-        QString qmldirAbsoluteFilePath = absoluteFilePath(qmldirPath);
+        qmldirAbsoluteFilePath = absoluteFilePath(qmldirPath);
         if (!qmldirAbsoluteFilePath.isEmpty()) {
             QString url;
             const QString absolutePath = qmldirAbsoluteFilePath.left(
@@ -380,6 +384,15 @@ QQmlImportDatabase::LocalQmldirResult QQmlImportDatabase::locateLocalQmldir(
             cache->qmldirPathUrl = QStringLiteral("intercepted");
         }
         qmldirCache.insert(uri, cache);
+
+        if (result == QmldirNotFound) {
+            qCDebug(lcQmlImport)
+                    << "locateLocalQmldir:" << qPrintable(uri) << "module's qmldir file not found";
+        }
+    } else {
+        qCDebug(lcQmlImport)
+                << "locateLocalQmldir:" << qPrintable(uri) << "module's qmldir found at"
+                << qmldirAbsoluteFilePath;
     }
 
     return result;