dev-python/twisted-core/files/twisted-core-9.0.0-respect_TWISTED_DISABLE_WRITING_OF_PLUGIN_CACHE.patch


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--- twisted/plugin.py
+++ twisted/plugin.py
@@ -174,7 +174,7 @@
             if pluginKey not in existingKeys:
                 del dropinDotCache[pluginKey]
                 needsWrite = True
-        if needsWrite:
+        if needsWrite and os.environ.get("TWISTED_DISABLE_WRITING_OF_PLUGIN_CACHE") is None:
             try:
                 dropinPath.setContent(pickle.dumps(dropinDotCache))
             except: