Rust: Merge query implementation into one file

Author: paldepind

rust/ql/lib/codeql/rust/security/regex/RegexInjectionQuery.qll

@@ -11,7 +11,32 @@
  *       external/cwe/cwe-400
  */
 
-private import codeql.rust.security.regex.RegexInjectionQuery
+private import rust
+private import codeql.rust.dataflow.DataFlow
+private import codeql.rust.dataflow.TaintTracking
+private import codeql.rust.Concepts
+private import codeql.rust.security.regex.RegexInjectionExtensions
+
+/**
+ * A taint configuration for detecting regular expression injection vulnerabilities.
+ */
+module RegexInjectionConfig implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { source instanceof ThreatModelSource }
+
+  predicate isSink(DataFlow::Node sink) { sink instanceof RegexInjectionSink }
+
+  predicate isBarrier(DataFlow::Node barrier) { barrier instanceof RegexInjectionBarrier }
+
+  predicate isAdditionalFlowStep(DataFlow::Node nodeFrom, DataFlow::Node nodeTo) {
+    any(RegexInjectionAdditionalFlowStep s).step(nodeFrom, nodeTo)
+  }
+}
+
+/**
+ * Detect taint flow of tainted data that reaches a regular expression sink.
+ */
+module RegexInjectionFlow = TaintTracking::Global<RegexInjectionConfig>;
+
 private import RegexInjectionFlow::PathGraph
 
 from RegexInjectionFlow::PathNode sourceNode, RegexInjectionFlow::PathNode sinkNode