[checker] Refactor by sharing code with the kernel

For historical reasons, the checker was duplicating a lot of code of the
kernel. The main differences I found were bug fixes that had not been
backported.

With this patch, the checker uses the kernel as a library to serve the
same purpose as before: validation of a `.vo` file, re-typechecking all
definitions a posteriori.

We also rename some files from the checker so that they don't clash with
kernel files.

1 files changed, 22 insertions, 0 deletions

diff --git a/checker/safe_checking.ml b/checker/safe_checking.ml
new file mode 100644
index 0000000000..90b5188d26
--- /dev/null
+++ b/checker/safe_checking.ml
@@ -0,0 +1,22 @@
+(************************************************************************)
+(*         *   The Coq Proof Assistant / The Coq Development Team       *)
+(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
+(* <O___,, *       (see CREDITS file for the list of authors)           *)
+(*   \VV/  **************************************************************)
+(*    //   *    This file is distributed under the terms of the         *)
+(*         *     GNU Lesser General Public License Version 2.1          *)
+(*         *     (see LICENSE file for the text of the license)         *)
+(************************************************************************)
+
+open Declarations
+open Environ
+
+let import clib univs digest =
+  let mb = Safe_typing.module_of_library clib in
+  let env = push_context_set ~strict:true mb.mod_constraints (Global.env ())  in
+  let env = push_context_set ~strict:true univs env in
+  Mod_checking.check_module env mb.mod_mp mb;
+  let _ = Global.import clib univs digest in ()
+
+let unsafe_import clib univs digest =
+  let _ = Global.import clib univs digest in ()