Convert Mux::RequestVars to MaD

Author: owen-mc

go/ql/lib/ext/github.com.gorilla.mux.model.yml

@@ -0,0 +1,6 @@
+extensions:
+  - addsTo:
+      pack: codeql/go-all
+      extensible: sourceModel
+    data:
+      - ["github.com/gorilla/mux", "", True, "Vars", "", "", "ReturnValue", "remote", "manual"] # TODO: should be .MapValue (and .MapKey?)

go/ql/lib/semmle/go/frameworks/Mux.qll

@@ -5,11 +5,17 @@
 import go
 
 /**
+ * DEPRECATED
+ *
  * Provides classes for working with concepts in the Mux HTTP middleware library.
  */
-module Mux {
-  /** An access to a Mux middleware variable. */
-  class RequestVars extends DataFlow::RemoteFlowSource::Range, DataFlow::CallNode {
+deprecated module Mux {
+  /**
+   * DEPRECATED: Use `RemoteFlowSource::Range` instead.
+   *
+   * An access to a Mux middleware variable.
+   */
+  deprecated class RequestVars extends DataFlow::RemoteFlowSource::Range, DataFlow::CallNode {
     RequestVars() {
       this.getTarget().hasQualifiedName(package("github.com/gorilla/mux", ""), "Vars")
     }