# HG changeset patch
# User Navaneeth Suresh <navaneeths1998@gmail.com>
# Date 2019-01-03 18:30:44
# Node ID 86f0ed7ac6886f978eee3835d2efe4b7fb2f0d8a
# Parent  c9a2c4d0e80f681a56935cddb6520b117ef5fcaa

histedit: add warning message on editing tagged commits (issue4017)

Differential Revision: https://phab.mercurial-scm.org/D5489

diff --git a/hgext/histedit.py b/hgext/histedit.py
--- a/hgext/histedit.py
+++ b/hgext/histedit.py
@@ -194,6 +194,7 @@ except ImportError:
 import functools
 import os
 import struct
+import time
 
 from mercurial.i18n import _
 from mercurial import (
@@ -1692,6 +1693,18 @@ def _histedit(ui, repo, state, *freeargs
 
     _validateargs(ui, repo, state, freeargs, opts, goal, rules, revs)
 
+    hastags = False
+    if revs:
+        revs = scmutil.revrange(repo, revs)
+        ctxs = [repo[rev] for rev in revs]
+        for ctx in ctxs:
+            tags = [tag for tag in ctx.tags() if tag != 'tip']
+            if not hastags:
+                hastags = len(tags)
+    if hastags:
+        ui.warn(_('warning: tags associated with the given changeset '
+        'will be lost after histedit \n'))
+        time.sleep(1)
     # rebuild state
     if goal == goalcontinue:
         state.read()