commit: factor out status printing into a helper function

We create a new function commitstatus() in cmdutil that handles printing
the status message(s) after a commit. This will allow other commit-like
commands to use it, and in particular is step 2 towards removing
backout's call to commands.commit.

mercurial/cmdutil.py

@@ -1821,6 +1821,52 def commitforceeditor(repo, ctx, subs):
 
     return text
 
+def commitstatus(repo, node, branch, bheads=None, opts={}):
+    ctx = repo[node]
+    parents = ctx.parents()
+
+    if (not opts.get('amend') and bheads and node not in bheads and not
+        [x for x in parents if x.node() in bheads and x.branch() == branch]):
+        repo.ui.status(_('created new head\n'))
+        # The message is not printed for initial roots. For the other
+        # changesets, it is printed in the following situations:
+        #
+        # Par column: for the 2 parents with ...
+        #   N: null or no parent
+        #   B: parent is on another named branch
+        #   C: parent is a regular non head changeset
+        #   H: parent was a branch head of the current branch
+        # Msg column: whether we print "created new head" message
+        # In the following, it is assumed that there already exists some
+        # initial branch heads of the current branch, otherwise nothing is
+        # printed anyway.
+        #
+        # Par Msg Comment
+        # N N  y  additional topo root
+        #
+        # B N  y  additional branch root
+        # C N  y  additional topo head
+        # H N  n  usual case
+        #
+        # B B  y  weird additional branch root
+        # C B  y  branch merge
+        # H B  n  merge with named branch
+        #
+        # C C  y  additional head from merge
+        # C H  n  merge with a head
+        #
+        # H H  n  head merge: head count decreases
+
+    if not opts.get('close_branch'):
+        for r in parents:
+            if r.closesbranch() and r.branch() == branch:
+                repo.ui.status(_('reopening closed branch head %d\n') % r)
+
+    if repo.ui.debugflag:
+        repo.ui.write(_('committed changeset %d:%s\n') % (int(ctx), ctx.hex()))
+    elif repo.ui.verbose:
+        repo.ui.write(_('committed changeset %d:%s\n') % (int(ctx), ctx))
+
 def revert(ui, repo, ctx, parents, *pats, **opts):
     parent, p2 = parents
     node = ctx.node()

mercurial/commands.py

@@ -1356,50 +1356,7 def commit(ui, repo, *pats, **opts):
                 ui.status(_("nothing changed\n"))
             return 1
 
-    ctx = repo[node]
-    parents = ctx.parents()
-
-    if (not opts.get('amend') and bheads and node not in bheads and not
-        [x for x in parents if x.node() in bheads and x.branch() == branch]):
-        ui.status(_('created new head\n'))
-        # The message is not printed for initial roots. For the other
-        # changesets, it is printed in the following situations:
-        #
-        # Par column: for the 2 parents with ...
-        #   N: null or no parent
-        #   B: parent is on another named branch
-        #   C: parent is a regular non head changeset
-        #   H: parent was a branch head of the current branch
-        # Msg column: whether we print "created new head" message
-        # In the following, it is assumed that there already exists some
-        # initial branch heads of the current branch, otherwise nothing is
-        # printed anyway.
-        #
-        # Par Msg Comment
-        # N N  y  additional topo root
-        #
-        # B N  y  additional branch root
-        # C N  y  additional topo head
-        # H N  n  usual case
-        #
-        # B B  y  weird additional branch root
-        # C B  y  branch merge
-        # H B  n  merge with named branch
-        #
-        # C C  y  additional head from merge
-        # C H  n  merge with a head
-        #
-        # H H  n  head merge: head count decreases
-
-    if not opts.get('close_branch'):
-        for r in parents:
-            if r.closesbranch() and r.branch() == branch:
-                ui.status(_('reopening closed branch head %d\n') % r)
-
-    if ui.debugflag:
-        ui.write(_('committed changeset %d:%s\n') % (int(ctx), ctx.hex()))
-    elif ui.verbose:
-        ui.write(_('committed changeset %d:%s\n') % (int(ctx), ctx))
+    cmdutil.commitstatus(repo, node, branch, bheads, opts)
 
 @command('copy|cp',
     [('A', 'after', None, _('record a copy that has already occurred')),