Swift: Also add local flow sources to summary queries.

Author: geoffw0

swift/ql/src/queries/Summary/FlowSources.ql

@@ -12,5 +12,11 @@
 import swift
 import codeql.swift.dataflow.FlowSources
 
-from RemoteFlowSource s
-select s, "Flow source: " + s.getSourceType()
+string sourceType(FlowSource s) {
+  s instanceof LocalFlowSource and result = "LocalFlowSource"
+  or
+  s instanceof RemoteFlowSource and result = "RemoteFlowSource"
+}
+
+from FlowSource s
+select s, sourceType(s) + ": " + s.getSourceType()

swift/ql/src/queries/Summary/SummaryStats.ql

@@ -15,6 +15,8 @@ predicate statistic(string what, int value) {
   or
   what = "Expressions" and value = count(Expr e | not e.getFile() instanceof UnknownFile)
   or
+  what = "Local flow sources" and value = count(LocalFlowSource s)
+  or
   what = "Remote flow sources" and value = count(RemoteFlowSource s)
   or
   what = "Sensitive expressions" and value = count(SensitiveExpr e)