[LNT] Python 3 support: adapt to removal of execfile

Replace calls to execfile by calling exec on the result of calling
compile on the result of calling open().read().

Reviewers: cmatthews, hubert.reinterpretcast, kristof.beyls

Reviewed By: hubert.reinterpretcast

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D67822

llvm-svn: 374687

Author: Thomas Preud'homme

lnt/server/db/migrate.py

@@ -162,7 +162,8 @@ def update_schema(engine, versions, available_migrations, schema_name):
         upgrade_script = schema_migrations[db_version]
 
         globals = {}
-        execfile(upgrade_script, globals)
+        exec(compile(open(upgrade_script).read(), upgrade_script, 'exec'),
+             globals)
         upgrade_method = globals['upgrade']
 
         # Execute the upgrade.

lnt/server/db/rules_manager.py

@@ -66,7 +66,7 @@ def register_hooks():
     global HOOKS_LOADED
     for name, path in load_rules().items():
         globals = {}
-        execfile(path, globals)
+        exec(compile(open(path).read(), path, 'exec'), globals)
         DESCRIPTIONS[name] = globals['__doc__']
         for hook_name in HOOKS.keys():
             if hook_name in globals: