rewriteutil: relax the sha1 hash references to handle future hash types

Per discussion with nbjoerg in IRC.

Differential Revision: https://phab.mercurial-scm.org/D8951

mercurial/rewriteutil.py

@@ -1,125 +1,125 b''
 # rewriteutil.py - utility functions for rewriting changesets
 #
 # Copyright 2017 Octobus <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import re
 
 from .i18n import _
 
 from . import (
     error,
     node,
     obsolete,
     obsutil,
     revset,
     scmutil,
 )
 
 
-sha1re = re.compile(br'\b[0-9a-f]{6,40}\b')
+NODE_RE = re.compile(br'\b[0-9a-f]{6,64}\b')
 
 
 def precheck(repo, revs, action=b'rewrite'):
     """check if revs can be rewritten
     action is used to control the error message.
 
     Make sure this function is called after taking the lock.
     """
     if node.nullrev in revs:
         msg = _(b"cannot %s null changeset") % action
         hint = _(b"no changeset checked out")
         raise error.Abort(msg, hint=hint)
 
     if len(repo[None].parents()) > 1:
         raise error.Abort(_(b"cannot %s while merging") % action)
 
     publicrevs = repo.revs(b'%ld and public()', revs)
     if publicrevs:
         msg = _(b"cannot %s public changesets") % action
         hint = _(b"see 'hg help phases' for details")
         raise error.Abort(msg, hint=hint)
 
     newunstable = disallowednewunstable(repo, revs)
     if newunstable:
         raise error.Abort(_(b"cannot %s changeset with children") % action)
 
 
 def disallowednewunstable(repo, revs):
     """Checks whether editing the revs will create new unstable changesets and
     are we allowed to create them.
 
     To allow new unstable changesets, set the config:
         `experimental.evolution.allowunstable=True`
     """
     allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
     if allowunstable:
         return revset.baseset()
     return repo.revs(b"(%ld::) - %ld", revs, revs)
 
 
 def skip_empty_successor(ui, command):
     empty_successor = ui.config(b'rewrite', b'empty-successor')
     if empty_successor == b'skip':
         return True
     elif empty_successor == b'keep':
         return False
     else:
         raise error.ConfigError(
             _(
                 b"%s doesn't know how to handle config "
                 b"rewrite.empty-successor=%s (only 'skip' and 'keep' are "
                 b"supported)"
             )
             % (command, empty_successor)
         )
 
 
 def update_hash_refs(repo, commitmsg, pending=None):
     """Replace all obsolete commit hashes in the message with the current hash.
 
     If the obsolete commit was split or is divergent, the hash is not replaced
     as there's no way to know which successor to choose.
 
     For commands that update a series of commits in the current transaction, the
     new obsolete markers can be considered by setting ``pending`` to a mapping
     of ``pending[oldnode] = [successor_node1, successor_node2,..]``.
     """
     if not pending:
         pending = {}
     cache = {}
-    sha1s = re.findall(sha1re, commitmsg)
+    hashes = re.findall(NODE_RE, commitmsg)
     unfi = repo.unfiltered()
-    for sha1 in sha1s:
-        fullnode = scmutil.resolvehexnodeidprefix(unfi, sha1)
+    for h in hashes:
+        fullnode = scmutil.resolvehexnodeidprefix(unfi, h)
         if fullnode is None:
             continue
         ctx = unfi[fullnode]
         if not ctx.obsolete():
             successors = pending.get(fullnode)
             if successors is None:
                 continue
             # obsutil.successorssets() returns a list of list of nodes
             successors = [successors]
         else:
             successors = obsutil.successorssets(repo, ctx.node(), cache=cache)
 
         # We can't make any assumptions about how to update the hash if the
         # cset in question was split or diverged.
         if len(successors) == 1 and len(successors[0]) == 1:
-            newsha1 = node.hex(successors[0][0])
-            commitmsg = commitmsg.replace(sha1, newsha1[: len(sha1)])
+            newhash = node.hex(successors[0][0])
+            commitmsg = commitmsg.replace(h, newhash[: len(h)])
         else:
             repo.ui.note(
                 _(
                     b'The stale commit message reference to %s could '
                     b'not be updated\n'
                 )
-                % sha1
+                % h
             )
 
     return commitmsg