# HG changeset patch
# User Mads Kiilerich <mads@kiilerich.com>
# Date 2019-05-27 00:12:15
# Node ID c662d42e1f9c29844eb7cc6dbd893bed4c16deca
# Parent  eda137096b3f9592c3193b28add69b50de8fd5ca

hg: prepare for Mercurial 5.0 changing "exact" arguments

In the backward compat wrapper, we use root=None. That might seem a bit risky.
But it seems to work for the single use case we have, and the changeset dropped
it in Mercurial https://www.mercurial-scm.org/repo/hg/rev/0531dff73d0b hint
that this parameter really is unused.

diff --git a/kallithea/lib/vcs/backends/hg/repository.py b/kallithea/lib/vcs/backends/hg/repository.py
--- a/kallithea/lib/vcs/backends/hg/repository.py
+++ b/kallithea/lib/vcs/backends/hg/repository.py
@@ -29,7 +29,7 @@ from kallithea.lib.vcs.utils.lazy import
 from kallithea.lib.vcs.utils.ordered_dict import OrderedDict
 from kallithea.lib.vcs.utils.paths import abspath
 from kallithea.lib.vcs.utils.hgcompat import (
-    ui, nullid, match, patch, diffopts, clone, get_contact,
+    ui, nullid, match, match_exact, patch, diffopts, clone, get_contact,
     localrepo, RepoLookupError, Abort, RepoError, hex, scmutil, hg_url,
     httpbasicauthhandler, httpdigestauthhandler, peer, httppeer, sshpeer, tag
 )
@@ -264,7 +264,7 @@ class MercurialRepository(BaseRepository
             self.get_changeset(rev1)
         self.get_changeset(rev2)
         if path:
-            file_filter = match(self.path, '', [path], exact=True)
+            file_filter = match_exact(path)
         else:
             file_filter = None
 
diff --git a/kallithea/lib/vcs/utils/hgcompat.py b/kallithea/lib/vcs/utils/hgcompat.py
--- a/kallithea/lib/vcs/utils/hgcompat.py
+++ b/kallithea/lib/vcs/utils/hgcompat.py
@@ -21,7 +21,7 @@ from mercurial.context import memctx, me
 from mercurial.error import RepoError, RepoLookupError, Abort
 from mercurial.hgweb import hgweb_mod
 from mercurial.hgweb.common import get_contact
-from mercurial.match import match
+from mercurial.match import match, exact as match_exact
 from mercurial.mdiff import diffopts
 from mercurial.node import hex
 from mercurial.encoding import tolocal
@@ -45,3 +45,7 @@ if inspect.getargspec(memfilectx.__init_
     __org_memfilectx_ = memfilectx
     memfilectx = lambda repo, changectx, path, data, islink=False, isexec=False, copysource=None: \
         __org_memfilectx_(repo, changectx, path, data, islink=islink, isexec=isexec, copied=copysource)
+
+# Mercurial 5.0 dropped exact argument for match in 635a12c53ea6, and 0531dff73d0b made the exact function stable with a single parameter
+if inspect.getargspec(match_exact).args[0] != 'files':
+    match_exact = lambda path: match(None, '', [path], exact=True)