[processing] Properly load basic providers

Processing module should only register it's own basic providers. Note that when reloading a plugin, subclasses of ProcessingProvider remains and new ones are added, so in such cases QgsProcessingProvider.__subclasses__() return same provider class many times.
qgis · Feb 21, 2018 · 3718d4e · 3718d4e
1 parent d3a4a34
commit 3718d4e
Showing 1 changed file with 8 additions and 4 deletions.
diff --git a/python/plugins/processing/core/Processing.py b/python/plugins/processing/core/Processing.py
@@ -85,11 +85,15 @@ def initialize():
         if "model" in [p.id() for p in QgsApplication.processingRegistry().providers()]:
             return
         # Add the basic providers
-        for c in QgsProcessingProvider.__subclasses__():
+        for c in [
+            QgisAlgorithmProvider,
+            Grass7AlgorithmProvider,
+            GdalAlgorithmProvider,
+            SagaAlgorithmProvider,
+            ScriptAlgorithmProvider,
+            ModelerAlgorithmProvider
+        ]:
             p = c()
-            if p.id() in ('native', '3d'):
-                # c++ providers are already registered
-                continue
             if QgsApplication.processingRegistry().addProvider(p):
                 Processing.BASIC_PROVIDERS.append(p)
         # And initialize