1 files changed, 17 insertions, 5 deletions
diff --git a/tools/checkdeps/checkdeps.py b/tools/checkdeps/checkdeps.py
index 4c00515..5ef4de3 100755
--- a/tools/checkdeps/checkdeps.py
+++ b/tools/checkdeps/checkdeps.py
@@ -241,18 +241,30 @@ def ApplyDirectoryRules(existing_rules, dir_name):
     print "Applying rules from", dir_name
   def FromImpl(unused):
     pass  # NOP function so "From" doesn't fail.
-  scope = {"From": FromImpl}
+
+  class _VarImpl:
+    def __init__(self, local_scope):
+      self._local_scope = local_scope
+
+    def Lookup(self, var_name):
+      """Implements the Var syntax."""
+      if var_name in self._local_scope.get("vars", {}):
+        return self._local_scope["vars"][var_name]
+      raise Error("Var is not defined: %s" % var_name)
+
+  local_scope = {}
+  global_scope = {"From": FromImpl, "Var": _VarImpl(local_scope).Lookup}
   deps_file = os.path.join(dir_name, "DEPS")
   if not os.path.exists(deps_file):
     if VERBOSE:
       print "  No deps file found in", dir_name
     return (existing_rules, [])  # Nothing to change from the input rules.
 
-  execfile(deps_file, scope)
+  execfile(deps_file, global_scope, local_scope)
 
-  deps = scope.get(DEPS_VAR_NAME, {})
-  include_rules = scope.get(INCLUDE_RULES_VAR_NAME, [])
-  skip_subdirs = scope.get(SKIP_SUBDIRS_VAR_NAME, [])
+  deps = local_scope.get(DEPS_VAR_NAME, {})
+  include_rules = local_scope.get(INCLUDE_RULES_VAR_NAME, [])
+  skip_subdirs = local_scope.get(SKIP_SUBDIRS_VAR_NAME, [])
 
   return (ApplyRules(existing_rules, deps, include_rules, dir_name),
           skip_subdirs)