# HG changeset patch
# User Kostia Balytskyi <ikostia@fb.com>
# Date 1459549231 25200
# Node ID 2637d6ad3e61cc8bcc16529a5a6124169f41c94f
# Parent  d30fdd6d1bf7c079f1d297ff8e8a1fa56018ec63
commands: disallow 'hg debugobsolete --index --rev <smth>'

A bug in the original --index implementation. The goal of --index is to allow
unique obsmarker identification that would be consistent between invocations
of this command in the unchanged repo. Further goal is to use this index to
delete arbitrary obsmarkers. So calling --index together with --rev would
cause obsmarker indices to be different than just calling --index. This is
not desired and current pattern for getting the index of an interesting
obsmarker is: `$ hg debugobsolete --index | grep <interesting hash>`.
It would clearly be better if we could somehow compute a hash of an obsmarker
and use it to identify the one we want to delete, but it seems a bit too
heavy for our current goals, so we can do this later if we want.

diff -r d30fdd6d1bf7 -r 2637d6ad3e61 mercurial/commands.py
--- a/mercurial/commands.py	Tue Apr 05 18:10:33 2016 +0100
+++ b/mercurial/commands.py	Fri Apr 01 15:20:31 2016 -0700
@@ -3095,6 +3095,9 @@
         finally:
             l.release()
     else:
+        if opts.get('rev') and opts.get('index'):
+            hint = _("call 'hg debugobsolete --index' without other arguments")
+            raise error.Abort(_("cannot use --index with --rev"), hint=hint)
         if opts['rev']:
             revs = scmutil.revrange(repo, opts['rev'])
             nodes = [repo[r].node() for r in revs]