# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2020-01-13 22:14:19
# Node ID 0803f803ba03b04f9132f6cabfa10d73c664a8eb
# Parent  bde1cd4c99d9bb0ead400ae333619cadcd8480ad

hashutil: new package for hashing-related features

Right now this just tries to use our sha1dc and if it's missing (eg a
--pure build) we fall back to hashlib. I imagine in the future we'll
want some other things in here for detecting what hasher is in use as
we transition off sha1.

Differential Revision: https://phab.mercurial-scm.org/D7848

diff --git a/mercurial/utils/hashutil.py b/mercurial/utils/hashutil.py
new file mode 100644
--- /dev/null
+++ b/mercurial/utils/hashutil.py
@@ -0,0 +1,9 @@
+from __future__ import absolute_import
+
+import hashlib
+
+try:
+    from mercurial.thirdparty import sha1dc
+    sha1 = sha1dc.sha1
+except (ImportError, AttributeError):
+    sha1 = hashlib.sha1