Invalidate component freshness by source generation

src/linux_fastcgi.cpp

@@ -1263,6 +1263,7 @@ void run_proactive_compiler()
 		{
 			auto tracked_units = compiler_list_known_units(&background_context);
 			StringList existing_units;
+			bool source_generation_changed = false;
 
 			for(auto& file_name : tracked_units)
 			{
@@ -1271,9 +1272,13 @@ void run_proactive_compiler()
 				bool retry_allowed = (retry_it == retry_after.end() || time_precise() >= retry_it->second);
 				bool needs_compile = compiler_unit_needs_recompile(&background_context, file_name, &source_missing);
 				if(needs_compile && retry_allowed)
+				{
 					proactive_compile_queue_push(compile_queue, file_name);
+					source_generation_changed = true;
+				}
 				if(source_missing)
 				{
+					source_generation_changed = true;
 					printf("(i) proactive compiler forget removed unit %s\n", file_name.c_str());
 					retry_after.erase(file_name);
 					continue;
@@ -1283,6 +1288,8 @@ void run_proactive_compiler()
 
 			if(existing_units.size() != tracked_units.size())
 				compiler_set_known_units(&background_context, existing_units);
+			if(source_generation_changed)
+				compiler_mark_source_generation(&background_context);
 
 			next_scan_at = time_precise() + check_interval;
 		}