From patchwork Fri Feb  7 04:26:01 2014
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Subject: [4, of,
 4] ui: edit(): transplant: set HGREVISION environment variable for an
 editor
From: Alexander Drozdov <al.drozdov@gmail.com>
X-Patchwork-Id: 3509
Message-Id: <8b9f2ec2dde1e08580bd.1391747161@localhost6.localdomain6>
To: mercurial-devel@selenic.com
Date: Fri, 07 Feb 2014 08:26:01 +0400

# HG changeset patch
# User Alexander Drozdov <al.drozdov@gmail.com>
# Date 1391746185 -14400
#      Fri Feb 07 08:09:45 2014 +0400
# Node ID 8b9f2ec2dde1e08580bd5893ce6253acc940a837
# Parent  01079ca49c16f7c0c3d53ba673f424368aea075e
ui: edit(): transplant: set HGREVISION environment variable for an editor

transplant command set 'transplant_source' extra for the revision.
Allow an editor to access the extra using HGREVISION environment variable.

This may be useful when an editor is actually a script which modifies a commit
message. Transplant filters is an alternative way to do it.

diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -8,6 +8,7 @@
 from i18n import _
 import errno, getpass, os, socket, sys, tempfile, traceback
 import config, scmutil, util, error, formatter
+from node import hex
 
 class ui(object):
     def __init__(self, src=None):
@@ -721,6 +722,10 @@
             f.close()
 
             environ = {'HGUSER': user}
+            for label in ('transplant_source',):
+                if label in extra:
+                    environ.update({'HGREVISION': hex(extra[label])})
+                    break
             for label in ('source', 'rebase_source'):
                 if label in extra:
                     environ.update({'HGREVISION': extra[label]})