macdeployqt: Fix plugin resolution bugs for non-standard installs

Uses QLibraryInfo to resolve plugins at installed locations.

[ChangeLog][macOS][macdeployqt] Uses QLibraryInfo to resolve plugins at install locations.

Task-number: QTBUG-91644
Change-Id: Ie309061024abd7a58ea62d707716342c99897c26
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
(cherry picked from commit 03abcbabbd4caa11048d19d95b23f165cd7a5361)

1 files changed, 24 insertions, 6 deletions

diff --git a/src/macdeployqt/macdeployqt/main.cpp b/src/macdeployqt/macdeployqt/main.cpp
index 8914e835b..628a71378 100644
--- a/src/macdeployqt/macdeployqt/main.cpp
+++ b/src/macdeployqt/macdeployqt/main.cpp
@@ -27,6 +27,7 @@
 ****************************************************************************/
 #include <QCoreApplication>
 #include <QDir>
+#include <QLibraryInfo>
 
 #include "../shared/shared.h"
 
@@ -237,11 +238,29 @@ int main(int argc, char **argv)
                           deploymentInfo.deployedFrameworks.end()).values();
     }
 
-    if (plugins && !deploymentInfo.qtPath.isEmpty()) {
-        deploymentInfo.pluginPath = deploymentInfo.qtPath + "/plugins";
-        LogNormal();
-        deployPlugins(appBundlePath, deploymentInfo, useDebugLibs);
-        createQtConf(appBundlePath);
+    // Handle plugins
+    if (plugins) {
+        // Set the plugins search directory
+        deploymentInfo.pluginPath = QLibraryInfo::path(QLibraryInfo::PluginsPath);
+
+        // Sanity checks
+        if (deploymentInfo.pluginPath.isEmpty()) {
+            LogError() << "Missing Qt plugins path\n";
+            return 1;
+        }
+
+        if (!QDir(deploymentInfo.pluginPath).exists()) {
+            LogError() << "Plugins path does not exist" << deploymentInfo.pluginPath << "\n";
+            return 1;
+        }
+
+        // Deploy plugins
+        Q_ASSERT(!deploymentInfo.pluginPath.isEmpty());
+        if (!deploymentInfo.pluginPath.isEmpty()) {
+            LogNormal();
+            deployPlugins(appBundlePath, deploymentInfo, useDebugLibs);
+            createQtConf(appBundlePath);
+        }
     }
 
     if (runStripEnabled)
@@ -257,4 +276,3 @@ int main(int argc, char **argv)
 
     return 0;
 }
-