Deployment: Adapt checking for plugin dependencies

- Check if package e.g. PySide6_AddOns is installed before checking for
  the .json file
- If a package is missing, add log warning for the missing package.
  If the .json file is missing inspite of the package being installed,
  then raise a proper warning.

Task-number: PYSIDE-1612
Change-Id: Ia65b06df15df7b334438f439762b135d9f61981d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
(cherry picked from commit 1396950daccded4b442c8a9d08aa10912a7641cf)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit c9b95832f9136b8bc8d6a929890360fd2a4c410f)

2 files changed, 14 insertions, 4 deletions

diff --git a/sources/pyside-tools/deploy_lib/config.py b/sources/pyside-tools/deploy_lib/config.py
index 2ca6ff895..d59dd92ad 100644
--- a/sources/pyside-tools/deploy_lib/config.py
+++ b/sources/pyside-tools/deploy_lib/config.py
@@ -391,7 +391,8 @@ class DesktopConfig(Config):
         if self.get_value("qt", "plugins"):
             self._qt_plugins = self.get_value("qt", "plugins").split(",")
         else:
-            self.qt_plugins = self.dependency_reader.find_plugin_dependencies(self.modules)
+            self.qt_plugins = self.dependency_reader.find_plugin_dependencies(self.modules,
+                                                                              python_exe)
 
         self._permissions = []
         if sys.platform == "darwin":
diff --git a/sources/pyside-tools/deploy_lib/dependency_util.py b/sources/pyside-tools/deploy_lib/dependency_util.py
index d71640ed0..2d5b188d3 100644
--- a/sources/pyside-tools/deploy_lib/dependency_util.py
+++ b/sources/pyside-tools/deploy_lib/dependency_util.py
@@ -285,13 +285,22 @@ class QtDependencyReader:
         else:
             logging.info(f"[DEPLOY] No Qt dependencies found for {module}")
 
-    def find_plugin_dependencies(self, used_modules: List[str]) -> List[str]:
+    def find_plugin_dependencies(self, used_modules: List[str], python_exe: Path) -> List[str]:
         """
         Given the modules used by the application, returns all the required plugins
         """
         plugins = set()
-        pyside_mod_plugin_jsons = ["PySide6_Essentials.json", "PySide6_Addons.json"]
-        for pyside_mod_plugin_json_name in pyside_mod_plugin_jsons:
+        pyside_wheels = ["PySide6_Essentials", "PySide6_Addons"]
+        # TODO from 3.12 use list(dist.name for dist in importlib.metadata.distributions())
+        _, installed_packages = run_command(command=[str(python_exe), "-m", "pip", "freeze"],
+                                            dry_run=False, fetch_output=True)
+        installed_packages = [p.decode().split('==')[0] for p in installed_packages.split()]
+        for pyside_wheel in pyside_wheels:
+            if pyside_wheel not in installed_packages:
+                # the wheel is not installed and hence no plugins are checked for its modules
+                logging.warning((f"[DEPLOY] The package {pyside_wheel} is not installed. "))
+                continue
+            pyside_mod_plugin_json_name = f"{pyside_wheel}.json"
             pyside_mod_plugin_json_file = self.pyside_install_dir / pyside_mod_plugin_json_name
             if not pyside_mod_plugin_json_file.exists():
                 warnings.warn(f"[DEPLOY] Unable to find {pyside_mod_plugin_json_file}.",