# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1500837646 -7200
# Node ID ebca049e8ca9668188d332c79000e197a7366f08
# Parent  ae690d39fc92ac5416c3048541ef71623d6a55af
amend: use precheck to validate revision

This gives us standard check and standard error message.

diff --git a/hgext3rd/evolve/cmdrewrite.py b/hgext3rd/evolve/cmdrewrite.py
--- a/hgext3rd/evolve/cmdrewrite.py
+++ b/hgext3rd/evolve/cmdrewrite.py
@@ -114,7 +114,13 @@
             opts['message'] = repo['.'].description()
         _resolveoptions(ui, opts)
         _alias, commitcmd = cmdutil.findcmd('commit', commands.table)
-        return commitcmd[0](ui, repo, *pats, **opts)
+        try:
+            wlock = repo.wlock()
+            lock = repo.lock()
+            rewriteutil.precheck(repo, [repo['.'].rev()], action='amend')
+            return commitcmd[0](ui, repo, *pats, **opts)
+        finally:
+            lockmod.release(lock, wlock)
 
 def _touchedbetween(repo, source, dest, match=None):
     touched = set()
diff --git a/tests/test-sharing.t b/tests/test-sharing.t
--- a/tests/test-sharing.t
+++ b/tests/test-sharing.t
@@ -147,7 +147,8 @@
 
 Now that the fix is public, we cannot amend it any more.
   $ hg amend -m 'fix bug 37'
-  abort: cannot amend public changesets
+  abort: cannot amend public changesets: de6151c48e1c
+  (see 'hg help phases' for details)
   [255]
 
 Figure SG05