merge with qsync fix compat-hg2.3
authorPierre-Yves David <pierre-yves.david@logilab.fr>
Wed, 07 Nov 2012 17:22:16 +0100
branchcompat-hg2.3
changeset 608 af29fbbefe7a
parent 600 cd29c8c8b0a1 (diff)
parent 607 b80de587d72d (current diff)
child 609 3e7ec61fbcdc
child 611 bd0f49f2ec83
merge with qsync fix
hgext/qsync.py
--- a/.hgtags	Wed Nov 07 17:19:54 2012 +0100
+++ b/.hgtags	Wed Nov 07 17:22:16 2012 +0100
@@ -10,3 +10,6 @@
 1b2757c1bd918509184f6c1d06b2329a847e31b0 0.7
 b18b000363550f02f413aed008f8e306318c608c 1.0.0
 ca5bb72d14aeb6e6053e3a53c064a2b7dc8010e5 1.0.1
+b1bdcb4506defef0e857e2710633f7686d8034a5 1.0.2
+5559e5a4b656978c592d364f242edc62369d7e84 1.0.2
+c062edbcaf13135d0312fd2039deca74573ff4f0 1.1.0
--- a/MANIFEST.in	Wed Nov 07 17:19:54 2012 +0100
+++ b/MANIFEST.in	Wed Nov 07 17:22:16 2012 +0100
@@ -4,6 +4,7 @@
 include docs/*.py
 include docs/tutorials/*.t
 include docs/makefile
+include docs/static/*.svg
 include hgext/__init__.py
 include hgext/evolve.py
 include setup.py
--- a/README	Wed Nov 07 17:19:54 2012 +0100
+++ b/README	Wed Nov 07 17:22:16 2012 +0100
@@ -46,7 +46,14 @@
 Changelog
 ==================
 
-1.0.2 --
+1.1.0 -- 2012-10-26
+
+- fix troubles creation reporting from rebase
+- rename latecomer to bumped
+- renamed conflicting to divergent
+- smarter divergent handling
+
+1.0.2 -- 2012-09-19
 
 - fix hg fold bug
 - fix hg pull --rebase
--- a/debian/changelog	Wed Nov 07 17:19:54 2012 +0100
+++ b/debian/changelog	Wed Nov 07 17:22:16 2012 +0100
@@ -1,3 +1,9 @@
+mercurial-evolve (1.0.2-1) UNRELEASED; urgency=low
+
+  * New upstream Release
+
+ -- Pierre-Yves David <pierre-yves.david@logilab.fr>  Wed, 19 Sep 2012 17:38:47 +0200
+
 mercurial-evolve (1.0.1-1) UNRELEASED; urgency=low
 
   * New bug fix release
--- a/debian/control	Wed Nov 07 17:19:54 2012 +0100
+++ b/debian/control	Wed Nov 07 17:22:16 2012 +0100
@@ -7,11 +7,13 @@
  Pierre-Yves David <pierre-yves.david@logilab.fr>,
 Standards-Version: 3.9.3
 Build-Depends:
- mercurial (>= 2.3~),
- mercurial-common (>= 2.3~),
+ mercurial (>= 2.3~, <<2.4),
+ mercurial-common (>= 2.3~, <<2.4),
  python,
  debhelper (>= 8),
  python-sphinx (>= 1.0.8),
+ imagemagick,
+ librsvg2-bin,
 Python-Version: >= 2.6
 Homepage: https://bitbucket.org/marmoute/mutable-history
 
@@ -20,7 +22,7 @@
 Depends:
  ${python:Depends},
  ${misc:Depends},
- mercurial (>= 2.3~),
+ mercurial (>= 2.3~, <<2.4),
 Description: evolve extension for Mercurial
  This package provides the experimental "evolve" extension for the Mercurial
  DVCS.
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
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+  </g>
+</svg>
--- a/docs/instability.rst	Wed Nov 07 17:19:54 2012 +0100
+++ b/docs/instability.rst	Wed Nov 07 17:22:16 2012 +0100
@@ -32,9 +32,8 @@
 changing B content too. This requires the creation of **another**
 changeset, which is semantically good.
 
-::
+.. figure:: ./figures/edit-is-rewrite-step2.svg
 
-  Schema base,  A, B and B'
 
 To avoid duplication, the older changeset is usually discarded from accessible
 history. I'm calling them *obsolete* changesets.
@@ -116,7 +115,7 @@
 This allow much more flexible workflow but two major feature are lost in the
 process:
 
-:Graceful merge: MQ use plain-patch to store changeset content and patch have
+:graceful merge: MQ use plain-patch to store changeset content and patch have
                  trouble to apply in changing context. Applying your queue
                  becomes very painful when context changes.
 
--- a/docs/obs-concept.rst	Wed Nov 07 17:19:54 2012 +0100
+++ b/docs/obs-concept.rst	Wed Nov 07 17:22:16 2012 +0100
@@ -57,15 +57,8 @@
 *meaningful*.
 
 
-.. warning:: add a schema::
+.. figure:: ./figures/git.*
 
-        C
-        | B---<foo>
-        |/
-        |
-        A
-
-    Only B and A are visible.
 
 This simplifies the process of getting rid of old changesets. You can
 just leave them in place and move the reference on the new one. You
@@ -300,8 +293,7 @@
 will keep the same parent than `A'` and `A''` with two obsolete
 markers pointing to both `A` and `A'`
 
-.. warning::  TODO: Add a schema of the resolution. (merge A' and A'' with A as
-              ancestor and graft the result of A^)
+.. figure:: ./figures/explain-troubles-concurrent-10-solution.*
 
 Allowing multiple new changesets to obsolete a single one allows to
 distinguish a split changeset from a history rewriting conflict.
@@ -322,15 +314,17 @@
 * Public changesets are excluded from the obsolete set (public
   changesets are never hidden or candidate to garbage collection)
 
-* *newer* version of a public changeset are called **latecomer** and
+* *newer* version of a public changeset are called **bumped** and
   highlighted as an error case.
 
+.. figure:: ./figures/explain-troubles-concurrent-10-sumup.*
+
 Solving such an error is easy. Because we know what changeset a
-*latecomer* tries to rewrite, we can easily compute a smaller
+*bumped* tries to rewrite, we can easily compute a smaller
 changeset containing only the change from the old *public* to the new
-*latecomer*.
+*bumped*.
 
-.. warning:: add a schema
+.. figure:: ./figures/explain-troubles-concurrent-15-solution.*
 
 
 Conclusion
--- a/docs/obs-terms.rst	Wed Nov 07 17:19:54 2012 +0100
+++ b/docs/obs-terms.rst	Wed Nov 07 17:22:16 2012 +0100
@@ -104,18 +104,18 @@
 |                     | for *troubled*           |                             |
 |                     | changeset to combine     | (possible alternative name: |
 |                     | multiple issue at once.  | precarious)                 |
-|                     | (a.k.a. conflicting and  |                             |
+|                     | (a.k.a. divergent   and  |                             |
 |                     | unstable)                +-----------------------------+
 |                     |                          |                             |
-|                     | (possible alternative    | **latecomer**               |
+|                     | (possible alternative    | **bumped**                  |
 |                     | names: unsettled,        |                             |
-|                     | troublesome              | *latecomer* is a changeset  |
+|                     | troublesome              | *bumped* is a changeset     |
 |                     |                          | that tries to be successor  |
 |                     |                          | of  public changesets.      |
 |                     |                          |                             |
 |                     |                          | Public changeset can't      |
 |                     |                          | be deleted and replace      |
-|                     |                          | *latecomer*                 |
+|                     |                          | *bumped*                    |
 |                     |                          | need to be converted into   |
 |                     |                          | an overlay to this public   |
 |                     |                          | changeset.                  |
@@ -125,17 +125,17 @@
 |                     |                          | mindless, disenchanting)    |
 |                     |                          |                             |
 |                     |                          +-----------------------------+
-|                     |                          | **conflicting**             |
+|                     |                          | **divergent**               |
 |                     |                          |                             |
-|                     |                          | *conflicting* is changeset  |
+|                     |                          | *divergent*   is changeset  |
 |                     |                          | that appears when multiple  |
 |                     |                          | changesets are successors   |
 |                     |                          | of the same precursor.      |
 |                     |                          |                             |
-|                     |                          | *conflicting* are solved    |
+|                     |                          | *divergent*   are solved    |
 |                     |                          | through a three ways merge  |
 |                     |                          | between the two             |
-|                     |                          | *conflictings*,             |
+|                     |                          | *divergent*   ,             |
 |                     |                          | using the last "obsolete-   |
 |                     |                          | -common-ancestor" as the    |
 |                     |                          | base.                       |
@@ -145,7 +145,8 @@
 |                     |                          | conflict)                   |
 |                     |                          |                             |
 |                     |                          | (possible alternative names:|
-|                     |                          | clashing, rival)            |
+|                     |                          | clashing, rival, concurent, |
+|                     |                          | conflicting)                |
 |                     |                          |                             |
 |                     +--------------------------+-----------------------------+
 |                     |                                                        |
@@ -178,13 +179,6 @@
 |                                                                              |
 +------------------------------------------------------------------------------+
 
-.. note:: I'm not very happy with the naming of:
-
-          - "ok" changeset
-          - latecomer
-          - conflicting
-
-          Any better idea are welcome.
 
 
 Command and operation name
@@ -232,7 +226,7 @@
 ```````````````
 
 Automatically resolve *troublesome* changesets
-(*unstable*, *latecomer* and *conflicting*)
+(*unstable*, *bumped* and *divergent*)
 
 This is an important name as hg pull/push will suggest it the same way it
 suggest merging when you add heads.
--- a/hgext/evolve.py	Wed Nov 07 17:19:54 2012 +0100
+++ b/hgext/evolve.py	Wed Nov 07 17:22:16 2012 +0100
@@ -19,6 +19,10 @@
     - improves some aspect of the early implementation in 2.3
 '''
 
+testedwith = '2.3 2.3.1 2.3.2'
+buglink = 'https://bitbucket.org/marmoute/mutable-history/issues'
+
+
 import random
 
 from mercurial import util
@@ -28,7 +32,16 @@
     if not obsolete._enabled:
         obsolete._enabled = True
 except ImportError:
-    raise util.Abort('Obsolete extension requires Mercurial 2.3 (or later)')
+    raise util.Abort('Evolve extension requires Mercurial 2.3 (or later)')
+
+try:
+    getattr(obsolete, 'getrevs') # 2.4 specific
+    raise util.Abort('Your version of Mercurial is too recent for this '
+                     'version of evolve',
+                     hint="upgrade your evolve")
+except AttributeError:
+    pass
+
 
 from mercurial import bookmarks
 from mercurial import cmdutil
@@ -295,6 +308,25 @@
 reposetup = eh.final_reposetup
 
 #####################################################################
+### Critical fix                                                  ###
+#####################################################################
+
+@eh.wrapfunction(mercurial.obsolete, '_readmarkers')
+def safereadmarkers(orig, data):
+    """safe maker wrapper to remove nullid succesors
+
+    Nullid successors was created by older version of evolve.
+    """
+    for marker in orig(data):
+        if nullid in marker[1]:
+            marker = (marker[0],
+                      tuple(s for s in marker[1] if s != nullid),
+                      marker[2],
+                      marker[3])
+        yield marker
+
+
+#####################################################################
 ### Obsolescence Caching Logic                                    ###
 #####################################################################
 
@@ -478,8 +510,8 @@
 #####################################################################
 
 # there is two kind of trouble not handled by core right now:
-# - latecomer: (successors for public changeset)
-# - conflicting: (two changeset try to succeed to the same precursors)
+# - bumped: (successors for public changeset)
+# - divergent: (two changeset try to succeed to the same precursors)
 #
 # This section add support for those two addition trouble
 #
@@ -490,89 +522,94 @@
 ### Cache computation
 latediff = 1  # flag to prevent taking late comer fix into account
 
-@cachefor('latecomer')
-def _computelatecomerset(repo):
+@cachefor('bumped')
+def _computebumpedset(repo):
     """the set of rev trying to obsolete public revision"""
     candidates = _allsuccessors(repo, repo.revs('public()'),
                                                 haltonflags=latediff)
     query = '%ld - obsolete() - public()'
     return set(repo.revs(query, candidates))
 
-@cachefor('conflicting')
-def _computeconflictingset(repo):
+@cachefor('divergent')
+def _computedivergentset(repo):
     """the set of rev trying to obsolete public revision"""
-    conflicting = set()
+    divergent = set()
     obsstore = repo.obsstore
     newermap = {}
     for ctx in repo.set('(not public()) - obsolete()'):
-        prec = obsstore.successors.get(ctx.node(), ())
-        toprocess = set(prec)
+        mark = obsstore.successors.get(ctx.node(), ())
+        toprocess = set(mark)
         while toprocess:
             prec = toprocess.pop()[0]
             if prec not in newermap:
-                newermap[prec] = newerversion(repo, prec)
-            newer = [n for n in newermap[prec] if n] # filter kill
+                successorssets(repo, prec, newermap)
+            newer = [n for n in newermap[prec] if n]
             if len(newer) > 1:
-                conflicting.add(ctx.rev())
+                divergent.add(ctx.rev())
                 break
-        toprocess.update(obsstore.successors.get(prec, ()))
-    return conflicting
+            toprocess.update(obsstore.successors.get(prec, ()))
+    return divergent
 
 ### changectx method
 
 @eh.addattr(context.changectx, 'latecomer')
-def latecomer(ctx):
-    """is the changeset latecomer (Try to succeed to public change)"""
+@eh.addattr(context.changectx, 'bumped')
+def bumped(ctx):
+    """is the changeset bumped (Try to succeed to public change)"""
     if ctx.node() is None:
         return False
-    return ctx.rev() in getobscache(ctx._repo, 'latecomer')
+    return ctx.rev() in getobscache(ctx._repo, 'bumped')
 
 @eh.addattr(context.changectx, 'conflicting')
-def conflicting(ctx):
-    """is the changeset conflicting (Try to succeed to public change)"""
+@eh.addattr(context.changectx, 'divergent')
+def divergent(ctx):
+    """is the changeset divergent (Try to succeed to public change)"""
     if ctx.node() is None:
         return False
-    return ctx.rev() in getobscache(ctx._repo, 'conflicting')
+    return ctx.rev() in getobscache(ctx._repo, 'divergent')
 
 ### revset symbol
 
 @eh.revset('latecomer')
-def revsetlatecomer(repo, subset, x):
-    """``latecomer()``
+@eh.revset('bumped')
+def revsetbumped(repo, subset, x):
+    """``bumped()``
     Changesets marked as successors of public changesets.
     """
-    args = revset.getargs(x, 0, 0, 'latecomer takes no arguments')
-    lates = getobscache(repo, 'latecomer')
+    args = revset.getargs(x, 0, 0, 'bumped takes no arguments')
+    lates = getobscache(repo, 'bumped')
     return [r for r in subset if r in lates]
 
 @eh.revset('conflicting')
-def revsetconflicting(repo, subset, x):
-    """``conflicting()``
+@eh.revset('divergent')
+def revsetdivergent(repo, subset, x):
+    """``divergent()``
     Changesets marked as successors of a same changeset.
     """
-    args = revset.getargs(x, 0, 0, 'conflicting takes no arguments')
-    conf = getobscache(repo, 'conflicting')
+    args = revset.getargs(x, 0, 0, 'divergent takes no arguments')
+    conf = getobscache(repo, 'divergent')
     return [r for r in subset if r in conf]
 
 
+
 ### Discovery wrapping
 
 @eh.wrapfunction(discovery, 'checkheads')
 def wrapcheckheads(orig, repo, remote, outgoing, *args, **kwargs):
     """wrap mercurial.discovery.checkheads
 
-    * prevent latecomer and unstable to be pushed
+    * prevent bumped and unstable to be pushed
     """
     # do not push instability
     for h in outgoing.missingheads:
         # Checking heads is enough, obsolete descendants are either
         # obsolete or unstable.
         ctx = repo[h]
-        if ctx.latecomer():
-            raise util.Abort(_("push includes a latecomer changeset: %s!")
+        if ctx.bumped():
+            raise util.Abort(_("push includes a bumped changeset: %s!")
                              % ctx)
-        if ctx.conflicting():
-            raise util.Abort(_("push includes a conflicting changeset: %s!")
+        if ctx.divergent():
+            raise util.Abort(_("push includes a divergent changeset: %s!")
                              % ctx)
     return orig(repo, remote, outgoing, *args, **kwargs)
 
@@ -681,26 +718,26 @@
 def troubles(ctx):
     """Return a tuple listing all the troubles that affect a changeset
 
-    Troubles may be "unstable", "latecomer" or "conflicting".
+    Troubles may be "unstable", "bumped" or "divergent".
     """
     troubles = []
     if ctx.unstable():
         troubles.append('unstable')
-    if ctx.latecomer():
-        troubles.append('latecomer')
-    if ctx.conflicting():
-        troubles.append('conflicting')
+    if ctx.bumped():
+        troubles.append('bumped')
+    if ctx.divergent():
+        troubles.append('divergent')
     return tuple(troubles)
 
 ### Troubled revset symbol
 
 @eh.revset('troubled')
-def revsetlatecomer(repo, subset, x):
+def revsetbumped(repo, subset, x):
     """``troubled()``
     Changesets with troubles.
     """
     _ = revset.getargs(x, 0, 0, 'troubled takes no arguments')
-    return repo.revs('%ld and (unstable() + latecomer() + conflicting())',
+    return repo.revs('%ld and (unstable() + bumped() + divergent())',
                      subset)
 
 
@@ -780,29 +817,123 @@
             cs.add(sr)
     return cs
 
+nodemod = node
+def successorssets(repo, initialnode, cache=None):
+    """Return the newer version of an obsolete changeset"""
+
+    # prec -> markers mapping
+    markersfor = repo.obsstore.precursors
+
+    # Stack of node need to know the last successors set
+    toproceed = [initialnode]
+    # set version of toproceed for fast loop detection
+    stackedset = set(toproceed)
+    if cache is None:
+        cache = {}
+    while toproceed:
+        # work on the last node of the stack
+        node = toproceed[-1]
+        if node in cache:
+            # We already have a value for it.
+            # Keep working on something else.
+            stackedset.remove(toproceed.pop())
+        elif node not in markersfor:
+            # The node is not obsolete.
+            # This mean it is its own last successors.
+            if node in repo:
+                # We have a valid last successors.
+                cache[node] = [(node,)]
+            else:
+                # final obsolete version is unknown locally.
+                # Do not count that as a valid successors
+                cache[node] = []
+        else:
+            # <lss> stand for Last Successors Sets
+            # it contains the list of all last successors for the current node.
+            lss = []
+            for mark in markersfor[node]:
+                # <mlss> stand for Marker Last Successors Sets
+                # it contains the list of last successors set introduced by
+                # this marker.
+                mlss = [[]]
+                # iterate over possible multiple successors
+                for suc in mark[1]:
+                    if suc not in cache:
+                        # We do not know the last successors of that yet.
+                        if suc in stackedset:
+                            # Loop detected!
+                            #
+                            # we won't be able to ever compute a proper last
+                            # successors the naive and simple approve is to
+                            # consider it killed
+                            cache[suc] = []
+                        else:
+                            # Add the successor to the stack and break the next
+                            # iteration will work on this successors and the
+                            # algorithm will eventually process the current
+                            # node again.
+                            toproceed.append(suc)
+                            stackedset.add(suc)
+                            break
+                    # if we did not break, we can extend the possible set of
+                    # last successors.
+                    #
+                    # I say "extends" because if the marker have multiple
+                    # successors we have to generate
+                    #
+                    # if successors have multiple successors set (when ther are
+                    # divergent themself), we do a cartesian product of
+                    # possible successors set of already processed successors
+                    # and newly obtains successors set.
+                    newmlss = []
+                    for prefix in mlss:
+                        for suffix in cache[suc]:
+                            newss = list(prefix)
+                            for part in suffix:
+                                # do not duplicated entry in successors set.
+                                # first entry win.
+                                if part not in newss:
+                                    newss.append(part)
+                            newmlss.append(newss)
+                    mlss = newmlss
+                else:
+                    # note: mlss is still empty if the marker was a bare killing
+                    # of this changeset
+                    #
+                    # We extends the list of all possible successors sets with
+                    # successors set continuted by this marker
+                    lss.extend(mlss)
+                    # we use continue here to skip the break right bellow
+                    continue
+                # propagate "nested for" break.
+                # if the nested for exited on break, it did not ran the else
+                # clause and didn't "continue
+                break
+            else:
+                # computation was succesful for *all* marker.
+                # Add computed successors set to the cache
+                # (will be poped from to proceeed) on the new iteration
+                #
+                # We remove successors set that are subset of another one
+                # this fil
+                candsucset = sorted(((len(ss), set(ss), ss) for ss in lss),
+                                    reverse=True)
+                finalsucset = []
+                for cl, cs, css in candsucset:
+                    if not css:
+                        # remove empty successors set
+                        continue
+                    for fs, fss in finalsucset:
+                        if cs.issubset(fs):
+                            break
+                    else:
+                        finalsucset.append((cs, css))
+                finalsucset = [s[1] for s in finalsucset]
+                finalsucset.reverse()
+                cache[node] = finalsucset
+    return cache[initialnode]
 
 
-def newerversion(repo, obs):
-    """Return the newer version of an obsolete changeset"""
-    toproceed = set([(obs,)])
-    # XXX known optimization available
-    newer = set()
-    objectrels = repo.obsstore.precursors
-    while toproceed:
-        current = toproceed.pop()
-        assert len(current) <= 1, 'splitting not handled yet. %r' % current
-        current = [n for n in current if n != nullid]
-        if current:
-            n, = current
-            if n in objectrels:
-                markers = objectrels[n]
-                for mark in markers:
-                    toproceed.add(tuple(mark[1]))
-            else:
-                newer.add(tuple(current))
-        else:
-            newer.add(())
-    return sorted(newer)
 
 
 #####################################################################
@@ -916,20 +1047,20 @@
 def warnobserrors(orig, ui, repo, *args, **kwargs):
     """display warning is the command resulted in more instable changeset"""
     priorunstables = len(repo.revs('unstable()'))
-    priorlatecomers = len(repo.revs('latecomer()'))
-    priorconflictings = len(repo.revs('conflicting()'))
+    priorbumpeds = len(repo.revs('bumped()'))
+    priordivergents = len(repo.revs('divergent()'))
     ret = orig(ui, repo, *args, **kwargs)
     # workaround phase stupidity
     phases._filterunknown(ui, repo.changelog, repo._phasecache.phaseroots)
     newunstables = len(repo.revs('unstable()')) - priorunstables
-    newlatecomers = len(repo.revs('latecomer()')) - priorlatecomers
-    newconflictings = len(repo.revs('conflicting()')) - priorconflictings
+    newbumpeds = len(repo.revs('bumped()')) - priorbumpeds
+    newdivergents = len(repo.revs('divergent()')) - priordivergents
     if newunstables > 0:
         ui.warn(_('%i new unstable changesets\n') % newunstables)
-    if newlatecomers > 0:
-        ui.warn(_('%i new latecomer changesets\n') % newlatecomers)
-    if newconflictings > 0:
-        ui.warn(_('%i new conflicting changesets\n') % newconflictings)
+    if newbumpeds > 0:
+        ui.warn(_('%i new bumped changesets\n') % newbumpeds)
+    if newdivergents > 0:
+        ui.warn(_('%i new divergent changesets\n') % newdivergents)
     return ret
 
 @eh.reposetup
@@ -968,11 +1099,11 @@
 
     ret = orig(ui, repo, *args, **kwargs)
     nbunstable = len(getobscache(repo, 'unstable'))
-    nblatecomer = len(getobscache(repo, 'latecomer'))
-    nbconflicting = len(getobscache(repo, 'unstable'))
+    nbbumped = len(getobscache(repo, 'bumped'))
+    nbdivergent = len(getobscache(repo, 'unstable'))
     write('unstable: %i changesets\n', nbunstable)
-    write('latecomer: %i changesets\n', nblatecomer)
-    write('conflicting: %i changesets\n', nbconflicting)
+    write('bumped: %i changesets\n', nbbumped)
+    write('divergent: %i changesets\n', nbdivergent)
     return ret
 
 
@@ -1115,11 +1246,14 @@
     try:
         rebase = extensions.find('rebase')
         if rebase:
-            entry = extensions.wrapcommand(rebase.cmdtable, 'rebase', warnobserrors)
-            extensions.wrapfunction(rebase, 'buildstate', buildstate)
-            extensions.wrapfunction(rebase, 'defineparents', defineparents)
-            extensions.wrapfunction(rebase, 'concludenode', concludenode)
-            extensions.wrapcommand(rebase.cmdtable, "rebase", cmdrebase)
+            incore = getattr(rebase, 'obsolete', None) is not None
+            if not incore:
+                extensions.wrapcommand(rebase.cmdtable, "rebase", cmdrebase)
+            extensions.wrapcommand(rebase.cmdtable, 'rebase', warnobserrors)
+            if not incore:
+                extensions.wrapfunction(rebase, 'buildstate', buildstate)
+                extensions.wrapfunction(rebase, 'defineparents', defineparents)
+                extensions.wrapfunction(rebase, 'concludenode', concludenode)
     except KeyError:
         pass  # rebase not found
 
@@ -1322,8 +1456,8 @@
     """Solve trouble in your repository
 
     - rebase unstable changeset to make it stable again,
-    - create proper diff from latecomer changeset,
-    - merge conflicting changeset.
+    - create proper diff from bumped changeset,
+    - merge divergent changeset.
 
     By default, take the first troubles changeset that looks relevant.
 
@@ -1333,7 +1467,7 @@
       working directory parent revision or one of its descendants and rebase
       it.
 
-    - For conflicting this mean "." if applicable.
+    - For divergent this mean "." if applicable.
 
     With --any, evolve pick any troubled changeset to solve
 
@@ -1364,10 +1498,10 @@
     troubles = tr.troubles()
     if 'unstable' in troubles:
         return _solveunstable(ui, repo, tr, opts['dry_run'])
-    elif 'latecomer' in troubles:
-        return _solvelatecomer(ui, repo, tr, opts['dry_run'])
-    elif 'conflicting' in troubles:
-        return _solveconflicting(ui, repo, tr, opts['dry_run'])
+    elif 'bumped' in troubles:
+        return _solvebumped(ui, repo, tr, opts['dry_run'])
+    elif 'divergent' in troubles:
+        return _solvedivergent(ui, repo, tr, opts['dry_run'])
     else:
         assert False  # WHAT? unknown troubles
 
@@ -1376,14 +1510,14 @@
     tr = _stabilizableunstable(repo, repo['.'])
     if tr is None:
         wdp = repo['.']
-        if 'conflicting' in wdp.troubles():
+        if 'divergent' in wdp.troubles():
             tr = wdp
     if tr is None and pickany:
         troubled = list(repo.set('unstable()'))
         if not troubled:
-            troubled = list(repo.set('latecomer()'))
+            troubled = list(repo.set('bumped()'))
         if not troubled:
-            troubled = list(repo.set('conflicting()'))
+            troubled = list(repo.set('divergent()'))
         if troubled:
             tr = troubled[0]
 
@@ -1414,13 +1548,13 @@
     if not obs.obsolete():
         obs = orig.parents()[1]
     assert obs.obsolete()
-    newer = newerversion(repo, obs.node())
+    newer = successorssets(repo, obs.node())
     # search of a parent which is not killed
-    while newer == [()]:
+    while not newer or newer == [()]:
         ui.debug("stabilize target %s is plain dead,"
                  " trying to stabilize on its parent")
         obs = obs.parents()[0]
-        newer = newerversion(repo, obs.node())
+        newer = successorssets(repo, obs.node())
     if len(newer) > 1:
         ui.write_err(_("conflict rewriting. can't choose destination\n"))
         return 2
@@ -1454,13 +1588,13 @@
         finally:
             lock.release()
 
-def _solvelatecomer(ui, repo, latecomer, dryrun=False):
-    """Stabilize a latecomer changeset"""
-    # For now we deny latecomer merge
-    if len(latecomer.parents()) > 1:
-        raise util.Abort('late comer stabilization is confused by latecomer'
-                         ' %s being a merge' % latecomer)
-    prec = repo.set('last(allprecursors(%d) and public())', latecomer).next()
+def _solvebumped(ui, repo, bumped, dryrun=False):
+    """Stabilize a bumped changeset"""
+    # For now we deny bumped merge
+    if len(bumped.parents()) > 1:
+        raise util.Abort('late comer stabilization is confused by bumped'
+                         ' %s being a merge' % bumped)
+    prec = repo.set('last(allprecursors(%d) and public())', bumped).next()
     # For now we deny target merge
     if len(prec.parents()) > 1:
         raise util.Abort('late comer evolution is confused by precursors'
@@ -1469,54 +1603,54 @@
     displayer = cmdutil.show_changeset(ui, repo, {'template': shorttemplate})
     repo.ui.status(_('recreate:'))
     if not ui.quiet:
-        displayer.show(latecomer)
+        displayer.show(bumped)
     repo.ui.status(_('atop:'))
     if not ui.quiet:
         displayer.show(prec)
     if dryrun:
-        todo = 'hg rebase --rev %s --dest %s;\n' % (latecomer, prec.p1())
+        todo = 'hg rebase --rev %s --dest %s;\n' % (bumped, prec.p1())
         repo.ui.write(todo)
         repo.ui.write('hg update %s;\n' % prec)
-        repo.ui.write('hg revert --all --rev %s;\n' % latecomer)
-        repo.ui.write('hg commit --msg "latecomer update to %s"')
+        repo.ui.write('hg revert --all --rev %s;\n' % bumped)
+        repo.ui.write('hg commit --msg "bumped update to %s"')
         return 0
     wlock = repo.wlock()
     try:
         newid = tmpctx = None
-        tmpctx = latecomer
+        tmpctx = bumped
         lock = repo.lock()
         try:
-            bmupdate = _bookmarksupdater(repo, latecomer.node())
+            bmupdate = _bookmarksupdater(repo, bumped.node())
             # Basic check for common parent. Far too complicated and fragile
-            tr = repo.transaction('latecomer-stabilize')
+            tr = repo.transaction('bumped-stabilize')
             try:
-                if not list(repo.set('parents(%d) and parents(%d)', latecomer, prec)):
+                if not list(repo.set('parents(%d) and parents(%d)', bumped, prec)):
                     # Need to rebase the changeset at the right place
                     repo.ui.status(_('rebasing to destination parent: %s\n') % prec.p1())
                     try:
-                        tmpid = relocate(repo, latecomer, prec.p1())
+                        tmpid = relocate(repo, bumped, prec.p1())
                         if tmpid is not None:
                             tmpctx = repo[tmpid]
-                            createmarkers(repo, [(latecomer, (tmpctx,))])
+                            createmarkers(repo, [(bumped, (tmpctx,))])
                     except MergeFailure:
-                        repo.opener.write('graftstate', latecomer.hex() + '\n')
+                        repo.opener.write('graftstate', bumped.hex() + '\n')
                         repo.ui.write_err(_('evolution failed!\n'))
                         repo.ui.write_err(_('fix conflict and run "hg evolve --continue"\n'))
                         raise
                 # Create the new commit context
                 repo.ui.status(_('computing new diff\n'))
                 files = set()
-                copied = copies.pathcopies(prec, latecomer)
+                copied = copies.pathcopies(prec, bumped)
                 precmanifest = prec.manifest()
-                for key, val in latecomer.manifest().iteritems():
+                for key, val in bumped.manifest().iteritems():
                     if precmanifest.pop(key, None) != val:
                         files.add(key)
                 files.update(precmanifest)  # add missing files
                 # commit it
                 if files: # something to commit!
                     def filectxfn(repo, ctx, path):
-                        if path in latecomer:
-                            fctx = latecomer[path]
+                        if path in bumped:
+                            fctx = bumped[path]
                             flags = fctx.flags()
                             mctx = context.memfilectx(fctx.path(), fctx.data(),
                                                       islink='l' in flags,
@@ -1524,24 +1658,24 @@
                                                       copied=copied.get(path))
                             return mctx
                         raise IOError()
-                    text = 'latecomer update to %s:\n\n' % prec
-                    text += latecomer.description()
+                    text = 'bumped update to %s:\n\n' % prec
+                    text += bumped.description()
 
                     new = context.memctx(repo,
                                          parents=[prec.node(), node.nullid],
                                          text=text,
                                          files=files,
                                          filectxfn=filectxfn,
-                                         user=latecomer.user(),
-                                         date=latecomer.date(),
-                                         extra=latecomer.extra())
+                                         user=bumped.user(),
+                                         date=bumped.date(),
+                                         extra=bumped.extra())
 
                     newid = repo.commitctx(new)
                 if newid is None:
                     createmarkers(repo, [(tmpctx, ())])
                     newid = prec.node()
                 else:
-                    phases.retractboundary(repo, latecomer.phase(), [newid])
+                    phases.retractboundary(repo, bumped.phase(), [newid])
                     createmarkers(repo, [(tmpctx, (repo[newid],))],
                                            flag=latediff)
                 bmupdate(newid)
@@ -1556,22 +1690,22 @@
     finally:
         wlock.release()
 
-def _solveconflicting(ui, repo, conflicting, dryrun=False):
-    base, others = conflictingdata(conflicting)
+def _solvedivergent(ui, repo, divergent, dryrun=False):
+    base, others = divergentdata(divergent)
     if len(others) > 1:
         raise util.Abort("We do not handle split yet")
     other = others[0]
-    if conflicting.phase() <= phases.public:
+    if divergent.phase() <= phases.public:
         raise util.Abort("We can't resolve this conflict from the public side")
     if len(other.parents()) > 1:
-        raise util.Abort("conflicting changeset can't be a merge (yet)")
-    if other.p1() not in conflicting.parents():
+        raise util.Abort("divergent changeset can't be a merge (yet)")
+    if other.p1() not in divergent.parents():
         raise util.Abort("parents are not common (not handled yet)")
 
     displayer = cmdutil.show_changeset(ui, repo, {'template': shorttemplate})
     ui.status(_('merge:'))
     if not ui.quiet:
-        displayer.show(conflicting)
+        displayer.show(divergent)
     ui.status(_('with: '))
     if not ui.quiet:
         displayer.show(other)
@@ -1579,23 +1713,23 @@
     if not ui.quiet:
         displayer.show(base)
     if dryrun:
-        ui.write('hg update -c %s &&\n' % conflicting)
+        ui.write('hg update -c %s &&\n' % divergent)
         ui.write('hg merge %s &&\n' % other)
         ui.write('hg commit -m "auto merge resolving conflict between '
-                 '%s and %s"&&\n' % (conflicting, other))
+                 '%s and %s"&&\n' % (divergent, other))
         ui.write('hg up -C %s &&\n' % base)
         ui.write('hg revert --all --rev tip &&\n')
         ui.write('hg commit -m "`hg log -r %s --template={desc}`";\n'
-                 % conflicting)
+                 % divergent)
         return
     wlock = lock = None
     try:
         wlock = repo.wlock()
         lock = repo.lock()
-        if conflicting not in repo[None].parents():
+        if divergent not in repo[None].parents():
             repo.ui.status(_('updating to "local" conflict\n'))
-            hg.update(repo, conflicting.rev())
-        repo.ui.note(_('merging conflicting changeset\n'))
+            hg.update(repo, divergent.rev())
+        repo.ui.note(_('merging divergent changeset\n'))
         stats = merge.update(repo,
                              other.node(),
                              branchmerge=True,
@@ -1616,13 +1750,13 @@
 /!\ * hg ci -m "same message as the amended changeset" => new cset Y
 /!\ * hg kill -n Y W Z
 """)
-        tr = repo.transaction('stabilize-conflicting')
+        tr = repo.transaction('stabilize-divergent')
         try:
-            repo.dirstate.setparents(conflicting.node(), node.nullid)
+            repo.dirstate.setparents(divergent.node(), node.nullid)
             oldlen = len(repo)
             amend(ui, repo)
             if oldlen == len(repo):
-                new = conflicting
+                new = divergent
                 # no changes
             else:
                 new = repo['.']
@@ -1635,7 +1769,7 @@
         lockmod.release(lock, wlock)
 
 
-def conflictingdata(ctx):
+def divergentdata(ctx):
     """return base, other part of a conflict
 
     This only return the first one.
@@ -1643,7 +1777,7 @@
     XXX this woobly function won't survive XXX
     """
     for base in ctx._repo.set('reverse(precursors(%d))', ctx):
-        newer = newerversion(ctx._repo, base.node())
+        newer = successorssets(ctx._repo, base.node())
         # drop filter and solution including the original ctx
         newer = [n for n in newer if n and ctx.node() not in n]
         if newer:
@@ -1722,6 +1856,8 @@
         try:
             new = set(noderange(repo, opts['new']))
             targetnodes = set(noderange(repo, revs))
+            if not targetnodes:
+                raise util.Abort('nothing to prune')
             if new:
                 sucs = tuple(repo[n] for n in new)
             else:
@@ -2101,6 +2237,60 @@
     finally:
         lockmod.release(lock, wlock)
 
+if 'debugsuccessorssets' not in commands.table:
+
+    @command('debugsuccessorssets',
+        [],
+        _('[REV]'))
+    def debugsuccessorssets(ui, repo, *revs):
+        """show set of successors for revision
+
+        Successors set of changeset A are a consistent group of revision that
+        succeed to A. Successors set contains non-obsolete changeset only.
+
+        In most case a changeset A have zero (changeset pruned) or a single
+        successors set that contains a single successors (changeset A replacement
+        by A')
+
+        But splitted changeset will result with successors set containing more than
+        a single element. Divergent rewritting will result in multiple successor
+        set.
+
+        result is displayed as follows::
+
+            <rev1>
+                <successors-1A>
+            <rev2>
+                <successors-2A>
+                <successors-2B1> <successors-2B1> <successors-2B1>
+
+        here rev2 have two possible successors sets. One hold three elements.
+
+        add --debug if you want full size node id.
+        """
+        cache = {}
+        s = str
+        if ui.debug:
+            def s(ctx):
+                return ctx.hex()
+        for rev in scmutil.revrange(repo, revs):
+            ctx = repo[rev]
+            if ui.debug():
+                ui.write('%s\n'% ctx.hex())
+                s = node.hex
+            else:
+                ui.write('%s\n'% ctx)
+                s = node.short
+            for ss in successorssets(repo, ctx.node(), cache):
+                if ss:
+                    ui.write('    ')
+                    ui.write(s(ss[0]))
+                    for n in ss[1:]:
+                        ui.write(' ')
+                        ui.write(s(n))
+                ui.write('\n')
+        pass
+
 
 @eh.wrapcommand('graft')
 def graftwrapper(orig, ui, repo, *revs, **kwargs):
--- a/hgext/qsync.py	Wed Nov 07 17:19:54 2012 +0100
+++ b/hgext/qsync.py	Wed Nov 07 17:22:16 2012 +0100
@@ -83,10 +83,10 @@
                 try:
                     store.getfile(patch_name)
                     review_list.append(patch_name)
-                except IOError, exc:
+                except IOError:
                     oldnode = oldfiles[patch_name]
                     evolve = extensions.find('evolve')
-                    newnodes = evolve.newerversion(repo, oldnode)
+                    newnodes = evolve.successorssets(repo, oldnode)
                     if newnodes:
                         newnodes = [n for n in newnodes if n and n[0] in repo] # remove killing
                     if not newnodes:
@@ -177,7 +177,7 @@
         usedold.add(oldhex)
         oldname = str(oldname)
         oldnode = bin(oldhex)
-        newnodes = evolve.newerversion(repo, oldnode)
+        newnodes = evolve.successorssets(repo, oldnode)
         if newnodes:
             newnodes = [n for n in newnodes if n and n[0] in repo] # remove killing
             if len(newnodes) > 1:
--- a/setup.py	Wed Nov 07 17:19:54 2012 +0100
+++ b/setup.py	Wed Nov 07 17:22:16 2012 +0100
@@ -5,7 +5,7 @@
 
 setup(
     name='hg-evolve',
-    version='1.0.1',
+    version='1.0.2',
     author='Pierre-Yves David',
     maintainer='Pierre-Yves David',
     maintainer_email='pierre-yves.david@logilab.fr',
--- a/tests/test-evolve.t	Wed Nov 07 17:19:54 2012 +0100
+++ b/tests/test-evolve.t	Wed Nov 07 17:22:16 2012 +0100
@@ -296,12 +296,12 @@
   6	feature-A: a nifty feature - test
   0	: base - test
 
-phase change turning obsolete changeset public issue a latecomer warning
+phase change turning obsolete changeset public issue a bumped warning
 
   $ hg phase --public 7
-  1 new latecomer changesets
+  1 new bumped changesets
 
-all solving latecomer troubled
+all solving bumped troubled
 
   $ hg glog
   @  8	feature-B: another feature that rox - test
@@ -316,9 +316,9 @@
   recreate:[8] another feature that rox
   atop:[7] another feature
   computing new diff
-  commited as 8d77fa12ab0c
+  commited as 53ff506edef1
   $ hg glog
-  @  9	feature-B: latecomer update to 5f4744038ed5: - test
+  @  9	feature-B: bumped update to 5f4744038ed5: - test
   |
   o  7	: another feature - test
   |
@@ -334,7 +334,7 @@
   @@ -3,1 +3,1 @@
   -Zwei
   +deux
-  $ hg log -r 'latecomer()' # no more latecomer
+  $ hg log -r 'bumped()' # no more bumped
 
   $ cd ..
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-obsolete-divergent.t	Wed Nov 07 17:22:16 2012 +0100
@@ -0,0 +1,439 @@
+Test file decicated to testing the divergent troubles from obsolete changeset.
+
+This is the most complexe troubles from far so we isolate it in a dedicated
+file.
+
+Enable obsolete
+
+  $ cat >> $HGRCPATH << EOF
+  > [ui]
+  > logtemplate = {rev}:{node|short} {desc}\n
+  > [alias]
+  > debugobsolete = debugobsolete -d '0 0'
+  > [phases]
+  > publish=False
+  > [extensions]
+  > rebase=
+  > EOF
+  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext/evolve.py" >> $HGRCPATH
+
+
+  $ mkcommit() {
+  >    echo "$1" > "$1"
+  >    hg add "$1"
+  >    hg ci -m "$1"
+  > }
+  $ getid() {
+  >    hg id --debug -ir "desc('$1')"
+  > }
+
+setup repo
+
+  $ hg init reference
+  $ cd reference
+  $ mkcommit base
+  $ mkcommit A_0
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit A_1
+  created new head
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit A_2
+  created new head
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ cd ..
+
+
+  $ newcase() {
+  >    hg clone -u 0 -q reference $1
+  >    cd $1
+  > }
+
+direct divergence
+-----------------
+
+A_1 have two direct and divergent successors A_1 and A_1
+
+  $ newcase direct
+  $ hg debugobsolete `getid A_0` `getid A_1`
+  $ hg debugobsolete `getid A_0` `getid A_2`
+  $ hg log -G --hidden
+  o  3:392fd25390da A_2
+  |
+  | o  2:82623d38b9ba A_1
+  |/
+  | x  1:007dc284c1f8 A_0
+  |/
+  @  0:d20a80d4def3 base
+  
+  $ hg debugsuccessorssets 'all()'
+  d20a80d4def3
+      d20a80d4def3
+  007dc284c1f8
+      392fd25390da
+      82623d38b9ba
+  82623d38b9ba
+      82623d38b9ba
+  392fd25390da
+      392fd25390da
+  $ hg log -r 'divergent()'
+  2:82623d38b9ba A_1
+  3:392fd25390da A_2
+
+check that mercurial refuse to push
+
+  $ hg init ../other
+  $ hg push ../other
+  pushing to ../other
+  searching for changes
+  abort: push includes a divergent changeset: 82623d38b9ba!
+  (use 'hg evolve' to get a stable history or --force to ignore warnings)
+  [255]
+
+  $ cd ..
+
+
+indirect divergence with known changeset
+-------------------------------------------
+
+  $ newcase indirect_known
+  $ hg debugobsolete `getid A_0` `getid A_1`
+  $ hg debugobsolete `getid A_0` `getid A_2`
+  $ mkcommit A_3
+  created new head
+  $ hg debugobsolete `getid A_2` `getid A_3`
+  $ hg log -G --hidden
+  @  4:01f36c5a8fda A_3
+  |
+  | x  3:392fd25390da A_2
+  |/
+  | o  2:82623d38b9ba A_1
+  |/
+  | x  1:007dc284c1f8 A_0
+  |/
+  o  0:d20a80d4def3 base
+  
+  $ hg debugsuccessorssets 'all()'
+  d20a80d4def3
+      d20a80d4def3
+  007dc284c1f8
+      01f36c5a8fda
+      82623d38b9ba
+  82623d38b9ba
+      82623d38b9ba
+  392fd25390da
+      01f36c5a8fda
+  01f36c5a8fda
+      01f36c5a8fda
+  $ hg log -r 'divergent()'
+  2:82623d38b9ba A_1
+  4:01f36c5a8fda A_3
+  $ cd ..
+
+
+indirect divergence with known changeset
+-------------------------------------------
+
+  $ newcase indirect_unknown
+  $ hg debugobsolete `getid A_0` aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+  $ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid A_1`
+  $ hg debugobsolete `getid A_0` `getid A_2`
+  $ hg log -G --hidden
+  o  3:392fd25390da A_2
+  |
+  | o  2:82623d38b9ba A_1
+  |/
+  | x  1:007dc284c1f8 A_0
+  |/
+  @  0:d20a80d4def3 base
+  
+  $ hg debugsuccessorssets 'all()'
+  d20a80d4def3
+      d20a80d4def3
+  007dc284c1f8
+      392fd25390da
+      82623d38b9ba
+  82623d38b9ba
+      82623d38b9ba
+  392fd25390da
+      392fd25390da
+  $ hg log -r 'divergent()'
+  2:82623d38b9ba A_1
+  3:392fd25390da A_2
+  $ cd ..
+
+do not take unknown node in account if they are final
+-----------------------------------------------------
+
+  $ newcase final-unknown
+  $ hg debugobsolete `getid A_0` `getid A_1`
+  $ hg debugobsolete `getid A_1` `getid A_2`
+  $ hg debugobsolete `getid A_0` bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+  $ hg debugobsolete bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb cccccccccccccccccccccccccccccccccccccccc
+  $ hg debugobsolete `getid A_1` dddddddddddddddddddddddddddddddddddddddd
+
+  $ hg debugsuccessorssets 'desc('A_0')'
+  007dc284c1f8
+      392fd25390da
+
+  $ cd ..
+
+divergence that converge again is not divergence anymore
+-----------------------------------------------------
+
+  $ newcase converged_divergence
+  $ hg debugobsolete `getid A_0` `getid A_1`
+  $ hg debugobsolete `getid A_0` `getid A_2`
+  $ mkcommit A_3
+  created new head
+  $ hg debugobsolete `getid A_1` `getid A_3`
+  $ hg debugobsolete `getid A_2` `getid A_3`
+  $ hg log -G --hidden
+  @  4:01f36c5a8fda A_3
+  |
+  | x  3:392fd25390da A_2
+  |/
+  | x  2:82623d38b9ba A_1
+  |/
+  | x  1:007dc284c1f8 A_0
+  |/
+  o  0:d20a80d4def3 base
+  
+  $ hg debugsuccessorssets 'all()'
+  d20a80d4def3
+      d20a80d4def3
+  007dc284c1f8
+      01f36c5a8fda
+  82623d38b9ba
+      01f36c5a8fda
+  392fd25390da
+      01f36c5a8fda
+  01f36c5a8fda
+      01f36c5a8fda
+  $ hg log -r 'divergent()'
+  $ cd ..
+
+split is not divergences
+-----------------------------
+
+  $ newcase split
+  $ hg debugobsolete `getid A_0` `getid A_1` `getid A_2`
+  $ hg log -G --hidden
+  o  3:392fd25390da A_2
+  |
+  | o  2:82623d38b9ba A_1
+  |/
+  | x  1:007dc284c1f8 A_0
+  |/
+  @  0:d20a80d4def3 base
+  
+  $ hg debugsuccessorssets 'all()'
+  d20a80d4def3
+      d20a80d4def3
+  007dc284c1f8
+      82623d38b9ba 392fd25390da
+  82623d38b9ba
+      82623d38b9ba
+  392fd25390da
+      392fd25390da
+  $ hg log -r 'divergent()'
+
+Even when subsequente rewriting happen
+
+  $ mkcommit A_3
+  created new head
+  $ hg debugobsolete `getid A_1` `getid A_3`
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit A_4
+  created new head
+  $ hg debugobsolete `getid A_2` `getid A_4`
+  $ hg up 0
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit A_5
+  created new head
+  $ hg debugobsolete `getid A_4` `getid A_5`
+  $ hg log -G --hidden
+  @  6:e442cfc57690 A_5
+  |
+  | x  5:6a411f0d7a0a A_4
+  |/
+  | o  4:01f36c5a8fda A_3
+  |/
+  | x  3:392fd25390da A_2
+  |/
+  | x  2:82623d38b9ba A_1
+  |/
+  | x  1:007dc284c1f8 A_0
+  |/
+  o  0:d20a80d4def3 base
+  
+  $ hg debugsuccessorssets 'all()'
+  d20a80d4def3
+      d20a80d4def3
+  007dc284c1f8
+      01f36c5a8fda e442cfc57690
+  82623d38b9ba
+      01f36c5a8fda
+  392fd25390da
+      e442cfc57690
+  01f36c5a8fda
+      01f36c5a8fda
+  6a411f0d7a0a
+      e442cfc57690
+  e442cfc57690
+      e442cfc57690
+  $ hg log -r 'divergent()'
+
+Check more complexe obsolescence graft (with divergence)
+
+  $ mkcommit B_0; hg up 0
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ hg debugobsolete `getid B_0` `getid A_2`
+  $ mkcommit A_7; hg up 0
+  created new head
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ mkcommit A_8; hg up 0
+  created new head
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg debugobsolete `getid A_5` `getid A_7` `getid A_8`
+  $ mkcommit A_9; hg up 0
+  created new head
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg debugobsolete `getid A_5` `getid A_9`
+  $ hg log -G --hidden
+  o  10:bed64f5d2f5a A_9
+  |
+  | o  9:14608b260df8 A_8
+  |/
+  | o  8:7ae126973a96 A_7
+  |/
+  | x  7:3750ebee865d B_0
+  | |
+  | x  6:e442cfc57690 A_5
+  |/
+  | x  5:6a411f0d7a0a A_4
+  |/
+  | o  4:01f36c5a8fda A_3
+  |/
+  | x  3:392fd25390da A_2
+  |/
+  | x  2:82623d38b9ba A_1
+  |/
+  | x  1:007dc284c1f8 A_0
+  |/
+  @  0:d20a80d4def3 base
+  
+  $ hg debugsuccessorssets 'all()'
+  d20a80d4def3
+      d20a80d4def3
+  007dc284c1f8
+      01f36c5a8fda bed64f5d2f5a
+      01f36c5a8fda 7ae126973a96 14608b260df8
+  82623d38b9ba
+      01f36c5a8fda
+  392fd25390da
+      bed64f5d2f5a
+      7ae126973a96 14608b260df8
+  01f36c5a8fda
+      01f36c5a8fda
+  6a411f0d7a0a
+      bed64f5d2f5a
+      7ae126973a96 14608b260df8
+  e442cfc57690
+      bed64f5d2f5a
+      7ae126973a96 14608b260df8
+  3750ebee865d
+      bed64f5d2f5a
+      7ae126973a96 14608b260df8
+  7ae126973a96
+      7ae126973a96
+  14608b260df8
+      14608b260df8
+  bed64f5d2f5a
+      bed64f5d2f5a
+  $ hg log -r 'divergent()'
+  4:01f36c5a8fda A_3
+  8:7ae126973a96 A_7
+  9:14608b260df8 A_8
+  10:bed64f5d2f5a A_9
+
+fix the divergence
+
+  $ mkcommit A_A; hg up 0
+  created new head
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg debugobsolete `getid A_9` `getid A_A`
+  $ hg debugobsolete `getid A_7` `getid A_A`
+  $ hg debugobsolete `getid A_8` `getid A_A`
+  $ hg log -G --hidden
+  o  11:a139f71be9da A_A
+  |
+  | x  10:bed64f5d2f5a A_9
+  |/
+  | x  9:14608b260df8 A_8
+  |/
+  | x  8:7ae126973a96 A_7
+  |/
+  | x  7:3750ebee865d B_0
+  | |
+  | x  6:e442cfc57690 A_5
+  |/
+  | x  5:6a411f0d7a0a A_4
+  |/
+  | o  4:01f36c5a8fda A_3
+  |/
+  | x  3:392fd25390da A_2
+  |/
+  | x  2:82623d38b9ba A_1
+  |/
+  | x  1:007dc284c1f8 A_0
+  |/
+  @  0:d20a80d4def3 base
+  
+  $ hg debugsuccessorssets 'all()'
+  d20a80d4def3
+      d20a80d4def3
+  007dc284c1f8
+      01f36c5a8fda a139f71be9da
+  82623d38b9ba
+      01f36c5a8fda
+  392fd25390da
+      a139f71be9da
+  01f36c5a8fda
+      01f36c5a8fda
+  6a411f0d7a0a
+      a139f71be9da
+  e442cfc57690
+      a139f71be9da
+  3750ebee865d
+      a139f71be9da
+  7ae126973a96
+      a139f71be9da
+  14608b260df8
+      a139f71be9da
+  bed64f5d2f5a
+      a139f71be9da
+  a139f71be9da
+      a139f71be9da
+  $ hg log -r 'divergent()'
+
+  $ cd ..
+
+
+Subset does not diverge
+------------------------------
+
+Do not report divergent successors-set if it is a subset of another
+successors-set. (report [A,B] not [A] + [A,B])
+
+  $ newcase subset
+  $ hg debugobsolete `getid A_0` `getid A_2`
+  $ hg debugobsolete `getid A_0` `getid A_1` `getid A_2`
+  $ hg debugsuccessorssets 'desc('A_0')'
+  007dc284c1f8
+      82623d38b9ba 392fd25390da
+
+  $ cd ..
--- a/tests/test-obsolete-rebase.t	Wed Nov 07 17:19:54 2012 +0100
+++ b/tests/test-obsolete-rebase.t	Wed Nov 07 17:22:16 2012 +0100
@@ -286,26 +286,25 @@
   $ hg ci -m 'babar is not dead'
   $ echo '[ui]' >> .hg/hgrc
   $ echo 'logtemplate={rev} {node|short} {desc|firstline}\n' >> .hg/hgrc
-  $ hg pull --rebase --traceback
+  $ hg pull --rebase --traceback | grep -v 'saved'
   pulling from $TESTTMP/repo
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 5 changesets with 5 changes to 5 files (+4 heads)
-  saved backup bundle to $TESTTMP/other/.hg/strip-backup/2a6c62a1b55d-backup.hg
   $ hg glog
-  @  7 d5567dbec794 babar is not dead
+  @  [78] d5567dbec794 babar is not dead (re)
   |
-  o  6 1951ead97108 appendab
+  o  [67] 1951ead97108 appendab (re)
   |
-  o  5 03f165c84ea8 addd
+  o  [56] 03f165c84ea8 addd (re)
   |
-  | o  4 a7773ffa7edc Collapsed revision
+  | o  [45] a7773ffa7edc Collapsed revision (re)
   |/
-  | o  3 9c5494949763 adde
+  | o  [34] 9c5494949763 adde (re)
   |/
-  | o  2 102a90ea7b4a addb
+  | o  [23] 102a90ea7b4a addb (re)
   | |
   o |  1 540395c44225 changea
   |/
--- a/tests/test-obsolete.t	Wed Nov 07 17:19:54 2012 +0100
+++ b/tests/test-obsolete.t	Wed Nov 07 17:22:16 2012 +0100
@@ -7,7 +7,6 @@
   > [alias]
   > odiff=diff --rev 'limit(precursors(.),1)' --rev .
   > [extensions]
-  > hgext.graphlog=
   > hgext.rebase=
   > EOF
   $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext/evolve.py" >> $HGRCPATH
@@ -141,7 +140,7 @@
 
 Test obsolete keyword
 
-  $ hg glog --template '{rev}:{node|short}@{branch}({obsolete}/{phase}) {desc|firstline}\n' \
+  $ hg log -G --template '{rev}:{node|short}@{branch}({obsolete}/{phase}) {desc|firstline}\n' \
   >   --hidden
   @  5:a7a6f2b5d8a5@default(unstable/draft) add d
   |
@@ -377,7 +376,7 @@
   commit: 1 deleted, 2 unknown (clean)
   update: 4 new changesets, 4 branch heads (merge)
   unstable: 1 changesets
-  conflicting: 1 changesets
+  divergent: 1 changesets
   $ qlog
   6
   - 909a0fb57e5d
@@ -405,7 +404,7 @@
   $ hg debugobsolete `getid 0` `getid 9`
 83b5778897ad try to obsolete immutable changeset 1f0dee641bb7
 # at core level the warning is not issued
-# this is now a big issue now that we have latecomer warning
+# this is now a big issue now that we have bumped warning
   $ qlog -r 'obsolete()'
   3
   - 0d3f46688ccc
@@ -458,19 +457,19 @@
 
 check rebase compat
 
-  $ hg glog -r 'not extinct()'  --template='{rev} - {node|short}\n'
-  o  8 - 159dfc9fa5d3
+  $ hg log -G  --template='{rev} - {node|short} {desc}\n'
+  o  8 - 159dfc9fa5d3 add obsol_d''
   |
-  | o  4 - 725c380fe99b
+  | o  4 - 725c380fe99b add obsol_c'
   | |
-  x |  3 - 0d3f46688ccc
+  x |  3 - 0d3f46688ccc add obsol_c
   |/
-  o  1 - 7c3bad9141dc
+  o  1 - 7c3bad9141dc add b
   |
-  o  0 - 1f0dee641bb7
+  o  0 - 1f0dee641bb7 add a
   
 
-  $ hg glog  --template='{rev} - {node|short}\n' --hidden
+  $ hg log -G  --template='{rev} - {node|short}\n' --hidden
   x  9 - 83b5778897ad
   
   o  8 - 159dfc9fa5d3
@@ -494,21 +493,21 @@
 
 should not rebase extinct changeset
 
-  $ hg --config extensions.hgext.rebase= rebase -s 7 -d 4
-  whole rebase set is extinct and ignored.
+#excluded 'whole rebase set is extinct and ignored.' message not in core
+  $ hg rebase -s 7 -d 4 2>&1 | grep -v 'whole rebase' 
   nothing to rebase
-  [1]
-  $ hg --config extensions.hgext.rebase= rebase -b 3 -d 4 --traceback
-  $ hg --config extensions.graphlog= glog -r 'not extinct()'  --template='{rev} - {node|short}\n'
-  @  11 - 9468a5f5d8b2
+  $ hg rebase -b '3' -d 4 --traceback
+  2 new divergent changesets
+  $ hg log -G --template='{rev} - {node|short} {desc}\n'
+  @  11 - 9468a5f5d8b2 add obsol_d''
   |
-  o  10 - 2033b4e49474
+  o  10 - 2033b4e49474 add obsol_c
   |
-  o  4 - 725c380fe99b
+  o  4 - 725c380fe99b add obsol_c'
   |
-  o  1 - 7c3bad9141dc
+  o  1 - 7c3bad9141dc add b
   |
-  o  0 - 1f0dee641bb7
+  o  0 - 1f0dee641bb7 add a
   
 
 Does not complain about new head if you obsolete the old one
@@ -533,13 +532,13 @@
   added 1 changesets with 1 changes to 1 files (+1 heads)
   $ cd ..
 
-check latecomer detection
+check bumped detection
 (make an obsolete changeset public)
 
   $ cd local
   $ hg phase --public 11
-  1 new latecomer changesets
-  $ hg --config extensions.graphlog=glog glog --template='{rev} - ({phase}) {node|short} {desc}\n'
+  1 new bumped changesets
+  $ hg log -G --template='{rev} - ({phase}) {node|short} {desc}\n'
   @  12 - (draft) 6db5e282cb91 add obsol_d'''
   |
   | o  11 - (public) 9468a5f5d8b2 add obsol_d''
@@ -552,7 +551,7 @@
   |
   o  0 - (public) 1f0dee641bb7 add a
   
-  $ hg log -r 'latecomer()'
+  $ hg log -r 'bumped()'
   changeset:   12:6db5e282cb91
   tag:         tip
   parent:      10:2033b4e49474
@@ -563,7 +562,7 @@
   $ hg push ../other-new/
   pushing to ../other-new/
   searching for changes
-  abort: push includes a latecomer changeset: 6db5e282cb91!
+  abort: push includes a bumped changeset: 6db5e282cb91!
   (use 'hg evolve' to get a stable history or --force to ignore warnings)
   [255]
 
@@ -575,7 +574,7 @@
   created new head
   $ echo 42 >> f
   $ hg commit --amend --traceback --quiet
-  $ hg glog
+  $ hg log -G
   @  changeset:   1[35]:3734a65252e6 (re)
   |  tag:         tip
   |  parent:      10:2033b4e49474
@@ -642,10 +641,16 @@
   branch: default
   commit: (clean)
   update: (9|11) new changesets, (9|10) branch heads \(merge\) (re)
-  latecomer: 1 changesets
+  bumped: 1 changesets
   $ hg debugobsolete `getid a7a6f2b5d8a5` `getid 50f11e5e3a63`
   $ hg log -r 'conflicting()'
-  changeset:   1[46]:50f11e5e3a63 (re)
+  changeset:   12:6db5e282cb91
+  parent:      10:2033b4e49474
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     add obsol_d'''
+  
+  changeset:   14:50f11e5e3a63
   tag:         tip
   parent:      11:9468a5f5d8b2
   user:        test
--- a/tests/test-stabilize-conflict.t	Wed Nov 07 17:19:54 2012 +0100
+++ b/tests/test-stabilize-conflict.t	Wed Nov 07 17:22:16 2012 +0100
@@ -19,6 +19,10 @@
   > EOF
   $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext/evolve.py" >> $HGRCPATH
 
+  $ safesed() {
+  >   sed "$1" "$2" > `pwd`/sed.temp
+  >   mv `pwd`/sed.temp "$2"
+  > }
 
 create a simple repo
 
@@ -57,7 +61,7 @@
   $ hg gdown
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   [1] babar count up to ten
-  $ sed -i'' 's/huit/height/' babar
+  $ safesed 's/huit/eight/' babar
   $ hg diff
   diff -r 9d5daf8bd956 babar
   --- a/babar	Thu Jan 01 00:00:00 1970 +0000
@@ -67,7 +71,7 @@
    six
    sept
   -huit
-  +height
+  +eight
    neuf
    dix
   $ hg amend
@@ -78,13 +82,13 @@
   merging babar
   $ hg resolve -l
   $ hg log -G
-  @  changeset:   5:fd62611d0178
+  @  changeset:   5:800217d738cd
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     babar count up to fifteen
   |
-  o  changeset:   4:83066dedff55
+  o  changeset:   4:6bd654225435
   |  parent:      0:29ec1554cfaf
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
@@ -103,14 +107,14 @@
   $ hg gdown
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   [4] babar count up to ten
-  $ sed -i'' 's/dix/ten/' babar
+  $ safesed 's/dix/ten/' babar
   $ hg diff
-  diff -r 83066dedff55 babar
+  diff -r 6bd654225435 babar
   --- a/babar	Thu Jan 01 00:00:00 1970 +0000
   +++ b/babar	* (glob)
   @@ -7,4 +7,4 @@
    sept
-   height
+   eight
    neuf
   -dix
   +ten
@@ -129,19 +133,19 @@
   $ hg resolve -l
   U babar
   $ hg log -G
-  @  changeset:   7:cc96f75eae0b
+  @  changeset:   7:3e191dd96e18
   |  tag:         tip
   |  parent:      0:29ec1554cfaf
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     babar count up to ten
   |
-  | @  changeset:   5:fd62611d0178
+  | @  changeset:   5:800217d738cd
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     babar count up to fifteen
   | |
-  | x  changeset:   4:83066dedff55
+  | x  changeset:   4:6bd654225435
   |/   parent:      0:29ec1554cfaf
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
@@ -156,19 +160,19 @@
 
   $ hg revert -r 5 --all
   reverting babar
-  $ sed -i'' 's/dix/ten/' babar
+  $ safesed 's/dix/ten/' babar
   $ hg resolve --all -m
   $ hg evolve --continue
   grafting revision 5
   $ hg resolve -l
   $ hg log -G
-  @  changeset:   8:ce7ee8fecf30
+  @  changeset:   8:92429cce7036
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     babar count up to fifteen
   |
-  o  changeset:   7:cc96f75eae0b
+  o  changeset:   7:3e191dd96e18
   |  parent:      0:29ec1554cfaf
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
@@ -182,26 +186,28 @@
 proper behavior with conflict using an external merge tools
 -----------------------------------------------------------
 
-  $ sed -i'' 's/merge=.*/merge=touch/' $HGRCPATH
-  $ sed -i'' 's/touch.gui=.*/touch.gui=false/' $HGRCPATH
+  $ safesed 's/merge=.*/merge=touch/' $HGRCPATH
+  $ safesed 's/touch.gui=.*/touch.gui=false/' $HGRCPATH
   $ hg gdown
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   [7] babar count up to ten
-  $ sed -i'' 's/ten/zehn/' babar
+  $ safesed 's/ten/zehn/' babar
   $ hg diff
-  diff -r cc96f75eae0b babar
+  diff -r 3e191dd96e18 babar
   --- a/babar	Thu Jan 01 00:00:00 1970 +0000
   +++ b/babar	* (glob)
   @@ -7,4 +7,4 @@
    sept
-   height
+   eight
    neuf
   -ten
   +zehn
   $ hg amend
   1 new unstable changesets
-  $ sed -i'' 's/interactive=.*/interactive=true/' $HGRCPATH
-  $ yes n 2> ../shutup | HGMERGE=touch hg evolve
+  $ safesed 's/interactive=.*/interactive=true/' $HGRCPATH
+  $ HGMERGE=touch hg evolve <<EOF
+  > n
+  > EOF
   move:[8] babar count up to fifteen
   atop:[10] babar count up to ten
   merging babar
@@ -214,19 +220,19 @@
   $ hg resolve -l
   U babar
   $ hg log -G
-  @  changeset:   10:02c637e61375
+  @  changeset:   10:a7fe09efd4a1
   |  tag:         tip
   |  parent:      0:29ec1554cfaf
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     babar count up to ten
   |
-  | @  changeset:   8:ce7ee8fecf30
+  | @  changeset:   8:92429cce7036
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     babar count up to fifteen
   | |
-  | x  changeset:   7:cc96f75eae0b
+  | x  changeset:   7:3e191dd96e18
   |/   parent:      0:29ec1554cfaf
   |    user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
@@ -245,6 +251,6 @@
   cinq
   six
   sept
-  height
+  eight
   neuf
   zehn
--- a/tests/test-stabilize-result.t	Wed Nov 07 17:19:54 2012 +0100
+++ b/tests/test-stabilize-result.t	Wed Nov 07 17:22:16 2012 +0100
@@ -131,7 +131,7 @@
 Make precursors public
 
   $ hg phase --public 8
-  1 new latecomer changesets
+  1 new bumped changesets
   $ glog
   @  12:15c83af6f3a3@default(draft) bk:[] newer a
   |
@@ -152,15 +152,15 @@
   hg rebase --rev 15c83af6f3a3 --dest e8cc1b534401;
   hg update e3183e9c0961;
   hg revert --all --rev 15c83af6f3a3;
-  hg commit --msg "latecomer update to %s" (no-eol)
+  hg commit --msg "bumped update to %s" (no-eol)
   $ hg evolve --any
   recreate:[12] newer a
   atop:[8] newer a
   rebasing to destination parent: e8cc1b534401
   computing new diff
-  commited as 1d94fef80e85
+  commited as eeeb8f6e7648
   $ glog
-  @  14:1d94fef80e85@default(draft) bk:[] latecomer update to e3183e9c0961:
+  @  14:eeeb8f6e7648@default(draft) bk:[] bumped update to e3183e9c0961:
   |
   | o  9:355c5cda4de1@default(draft) bk:[] add c
   | |
@@ -190,7 +190,7 @@
   $ glog
   @  15:7391601a4bfa@default(draft) bk:[] More addition
   |
-  | o  14:1d94fef80e85@default(draft) bk:[] latecomer update to e3183e9c0961:
+  | o  14:eeeb8f6e7648@default(draft) bk:[] bumped update to e3183e9c0961:
   | |
   o |  9:355c5cda4de1@default(draft) bk:[] add c
   | |
@@ -210,13 +210,13 @@
   $ cat a.old >> a
   $ rm a.old
   $ hg amend
-  2 new conflicting changesets
+  2 new divergent changesets
   $ glog
   @  19:3883461cc228@default(draft) bk:[] More addition
   |
   | o  17:4754d61bc2db@default(draft) bk:[] More addition
   |/
-  | o  14:1d94fef80e85@default(draft) bk:[] latecomer update to e3183e9c0961:
+  | o  14:eeeb8f6e7648@default(draft) bk:[] bumped update to e3183e9c0961:
   | |
   o |  9:355c5cda4de1@default(draft) bk:[] add c
   | |
@@ -240,7 +240,7 @@
   merge:[19] More addition
   with: [17] More addition
   base: [15] More addition
-  merging conflicting changeset
+  merging divergent changeset
   resolving manifests
   merging a
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
@@ -251,7 +251,7 @@
   $ glog
   @  22:ac6d600735a4@default(draft) bk:[] More addition
   |
-  | o  14:1d94fef80e85@default(draft) bk:[] latecomer update to e3183e9c0961:
+  | o  14:eeeb8f6e7648@default(draft) bk:[] bumped update to e3183e9c0961:
   | |
   o |  9:355c5cda4de1@default(draft) bk:[] add c
   | |
@@ -297,7 +297,10 @@
   Working directory parent is obsolete
   $ echo 'gotta break' >> a
   $ hg amend
-  1 new conflicting changesets
+  2 new divergent changesets
+  $ hg phase 'divergent()'
+  22: draft
+  24: draft
   $ hg evolve -qn
   hg update -c c956a4b140b6 &&
   hg merge ac6d600735a4 &&
--- a/tests/test-uncommit.t	Wed Nov 07 17:19:54 2012 +0100
+++ b/tests/test-uncommit.t	Wed Nov 07 17:22:16 2012 +0100
@@ -241,7 +241,7 @@
   Working directory parent is obsolete
   $ hg --config extensions.purge= purge
   $ hg uncommit -I 'set:added() and e'
-  2 new conflicting changesets
+  2 new divergent changesets
   $ hg st --copies
   A e
   $ hg st --copies --change .
@@ -285,7 +285,7 @@
   Working directory parent is obsolete
   $ hg --config extensions.purge= purge
   $ hg uncommit --all -X e
-  1 new conflicting changesets
+  1 new divergent changesets
   $ hg st --copies
   M b
   M d