debugobsolete: add a way to record parent information

We add a ``--record-parents`` flag to debugobsolete. This can be used to record
parent information in the marker when the precursors are known locally. This
will be useful to test the "relevant markers" computation.

mercurial/commands.py

@@ -2308,6 +2308,8 b' def debuglabelcomplete(ui, repo, *args):'
 
 @command('debugobsolete',
         [('', 'flags', 0, _('markers flag')),
+         ('', 'record-parents', False,
+          _('record parent information for the precursor')),
         ] + commitopts2,
          _('[OBSOLETED [REPLACEMENT] [REPL... ]'))
 def debugobsolete(ui, repo, precursor=None, *successors, **opts):
@@ -2342,8 +2344,16 b' def debugobsolete(ui, repo, precursor=No'
                         date = util.parsedate(date)
                     else:
                         date = None
-                    repo.obsstore.create(tr, parsenodeid(precursor), succs,
-                                         opts['flags'], date=date,
+                    prec = parsenodeid(precursor)
+                    parents = None
+                    if opts['record_parents']:
+                        if prec not in repo.unfiltered():
+                            raise util.Abort('cannot used --record-parents on '
+                                             'unknown changesets')
+                        parents = repo.unfiltered()[prec].parents()
+                        parents = tuple(p.node() for p in parents)
+                    repo.obsstore.create(tr, prec, succs, opts['flags'],
+                                         parents=parents, date=date,
                                          metadata=metadata)
                     tr.close()
                 except ValueError, exc:

tests/test-completion.t

@@ -244,7 +244,7 b' Show all commands + options'
   debuginstall: 
   debugknown: 
   debuglabelcomplete: 
-  debugobsolete: flags, date, user
+  debugobsolete: flags, record-parents, date, user
   debugpathcomplete: full, normal, added, removed
   debugpushkey: 
   debugpvec: 

tests/test-obsolete.t

@@ -417,7 +417,9 b' detect outgoing obsolete and unstable'
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ mkcommit original_d
   $ mkcommit original_e
-  $ hg debugobsolete `getid original_d` -d '0 0'
+  $ hg debugobsolete --record-parents `getid original_d` -d '0 0'
+  $ hg debugobsolete | grep `getid original_d`
+  94b33453f93bdb8d457ef9b770851a618bf413e1 0 {6f96419950729f3671185b847352890f074f7557} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   $ hg log -r 'obsolete()'
   4:94b33453f93b (draft) [ ] add original_d
   $ hg log -G -r '::unstable()'