--- a/hgext3rd/evolve/__init__.py
+++ b/hgext3rd/evolve/__init__.py
@@ -950,7 +950,7 @@
     except error.Abort as exc:
         repo.dirstate.beginparentchange()
         repo.setparents(repo['.'].node(), nullid)
-        writedirstate(repo.dirstate, tr)
+        repo.dirstate.write(tr)
         # fix up dirstate for copies and renames
         copies.duplicatecopies(repo, dest.rev(), orig.p1().rev())
         repo.dirstate.endparentchange()
@@ -978,33 +978,6 @@
             repo._bookmarks.recordchange(tr)
     return updatebookmarks
 
-### bookmarks api compatibility layer ###
-def bmdeactivate(repo):
-    try:
-        return bookmarksmod.deactivate(repo)
-    except AttributeError:
-        return bookmarksmod.unsetcurrent(repo)
-def bmactivate(repo, book):
-    try:
-        return bookmarksmod.activate(repo, book)
-    except AttributeError:
-        return bookmarksmod.setcurrent(repo, book)
-
-def bmactive(repo):
-    try:
-        return repo._activebookmark
-    except AttributeError:
-        return repo._bookmarkcurrent
-
-### dirstate compatibility layer < hg 3.6
-
-def writedirstate(dirstate, tr):
-    if dirstate.write.func_code.co_argcount != 1: # mercurial 3.6 and above
-        return dirstate.write(tr)
-    return dirstate.write()
-
-
-
 ### new command
 #############################
 metadataopts = [
@@ -2208,7 +2181,7 @@
             ui.warn(_('(do you want --no-topic)\n'))
         elif len(parents) == 1:
             p = parents[0]
-            bm = bmactive(repo)
+            bm = repo._activebookmark
             shouldmove = opts.get('move_bookmark') and bm is not None
             if dryrunopt:
                 ui.write(('hg update %s;\n' % p.rev()))
@@ -2225,7 +2198,7 @@
                             repo._bookmarks[bm] = p.node()
                             repo._bookmarks.recordchange(tr)
                         else:
-                            bmdeactivate(repo)
+                            bookmarksmod.deactivate(repo)
                         tr.close()
                     finally:
                         lockmod.release(tr, lock)
@@ -2282,7 +2255,7 @@
         displayer = cmdutil.show_changeset(ui, repo, {'template': shorttemplate})
         if len(children) == 1:
             c = children[0]
-            bm = bmactive(repo)
+            bm = repo._activebookmark
             shouldmove = opts.get('move_bookmark') and bm is not None
             if dryrunopt:
                 ui.write(('hg update %s;\n' % c.rev()))
@@ -2299,7 +2272,7 @@
                             repo._bookmarks[bm] = c.node()
                             repo._bookmarks.recordchange(tr)
                         else:
-                            bmdeactivate(repo)
+                            bookmarksmod.deactivate(repo)
                         tr.close()
                     finally:
                         lockmod.release(tr, lock)
@@ -2537,21 +2510,21 @@
                 changedfiles.extend(dirchanges)
                 repo.dirstate.rebuild(newnode.node(), newnode.manifest(),
                                       changedfiles)
-                writedirstate(dirstate, tr)
+                dirstate.write(tr)
             else:
-                bookactive = bmactive(repo)
+                bookactive = repo._activebookmark
                 # Active bookmark that we don't want to delete (with -B option)
                 # we deactivate and move it before the update and reactivate it
                 # after
                 movebookmark = bookactive and not bookmarks
                 if movebookmark:
-                    bmdeactivate(repo)
+                    bookmarksmod.deactivate(repo)
                     repo._bookmarks[bookactive] = newnode.node()
                     repo._bookmarks.recordchange(tr)
                 commands.update(ui, repo, newnode.rev())
                 ui.status(_('working directory now at %s\n') % newnode)
                 if movebookmark:
-                    bmactivate(repo, bookactive)
+                    bookmarksmod.activate(repo, bookactive)
 
         # update bookmarks
         if bookmarks:
@@ -2876,10 +2849,10 @@
             raise error.Abort(_("cannot split merge commits"))
         prev = ctx.p1()
         bmupdate = _bookmarksupdater(repo, ctx.node(), tr)
-        bookactive = bmactive(repo)
+        bookactive = repo._activebookmark
         if bookactive is not None:
-            repo.ui.status(_("(leaving bookmark %s)\n") % bmactive(repo))
-        bmdeactivate(repo)
+            repo.ui.status(_("(leaving bookmark %s)\n") % repo._activebookmark)
+        bookmarksmod.deactivate(repo)
         hg.update(repo, prev)
 
         commands.revert(ui, repo, rev=r, all=True)
@@ -2910,7 +2883,7 @@
             tip = repo[newcommits[-1]]
             bmupdate(tip.node())
             if bookactive is not None:
-                bmactivate(repo, bookactive)
+                bookmarksmod.activate(repo, bookactive)
             obsolete.createmarkers(repo, [(repo[r], newcommits)])
         tr.close()
     finally:
@@ -4107,9 +4080,9 @@
                      dest,
                      branchmerge=False,
                      force=True)
-    if bmactive(repo):
-       repo.ui.status(_("(leaving bookmark %s)\n") % bmactive(repo))
-    bmdeactivate(repo)
+    if repo._activebookmark:
+       repo.ui.status(_("(leaving bookmark %s)\n") % repo._activebookmark)
+    bookmarksmod.deactivate(repo)
     if keepbranch:
        repo.dirstate.setbranch(orig.branch())
     if util.safehasattr(repo, 'currenttopic'):