# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@ens-lyon.org>
# Date 1345719066 -7200
# Node ID d2531a747ff59e3e65cbc308d91e67348e3ff6d7
# Parent  4e0f1aae8d24432eec4e767e2bef76f41a2df131
evolve: fold command

First crude version of a fold command

diff -r 4e0f1aae8d24 -r d2531a747ff5 README
--- a/README	Thu Aug 23 12:51:34 2012 +0200
+++ b/README	Thu Aug 23 12:51:06 2012 +0200
@@ -52,6 +52,8 @@
 - merge and update ignore extinct changeset in most case.
 - new "troubled()" revset
 - summary now reports troubles changesets
+- new touch command
+- new fold command
 
 - rebase refuse to work on public changeset again
 - rebase explicitly state that there is nothing to rebase because everything is
diff -r 4e0f1aae8d24 -r d2531a747ff5 hgext/evolve.py
--- a/hgext/evolve.py	Thu Aug 23 12:51:34 2012 +0200
+++ b/hgext/evolve.py	Thu Aug 23 12:51:06 2012 +0200
@@ -843,6 +843,57 @@
     finally:
         wlock.release()
 
+@command('^fold',
+    [('r', 'rev', [], 'revision to fold'),],
+    # allow to choose the seed ?
+    _('[-r] revs'))
+def fold(ui, repo, *revs, **opts):
+    """Fold multiple revision into a single one"""
+    revs = list(revs)
+    revs.extend(opts['rev'])
+    if not revs:
+        revs = ['.']
+    revs = scmutil.revrange(repo, revs)
+    if not revs:
+        ui.write_err('no revision to fold\n')
+        return 1
+    roots = repo.revs('roots(%ld)', revs)
+    if len(roots) > 1:
+        raise util.Abort("set have multiple roots")
+    root = repo[roots[0]]
+    if root.phase() <= phases.public:
+        raise util.Abort("can't touch public revision")
+    heads = repo.revs('heads(%ld)', revs)
+    if len(heads) > 1:
+        raise util.Abort("set have multiple heads")
+    head = repo[heads[0]]
+    obsolete = extensions.find('obsolete')
+    wlock = repo.wlock()
+    try:
+        lock = repo.lock()
+        try:
+            tr = repo.transaction('touch')
+            try:
+                allctx = [repo[r] for r in revs]
+                targetphase = max(c.phase() for c in allctx)
+                msg = '\n\n***\n\n'.join(c.description() for c in allctx)
+                newid, _ = rewrite(repo, root, allctx, head,
+                                 [root.p1().node(), root.p2().node()],
+                                 commitopts={'message': msg})
+                phases.retractboundary(repo, targetphase, [newid])
+                obsolete.createmarkers(repo, [(ctx, (repo[newid],))
+                                               for ctx in allctx])
+                tr.close()
+            finally:
+                tr.release()
+        finally:
+            lock.release()
+        ui.status('%i changesets folded\n' % len(revs))
+        if repo.revs('. and %ld', revs):
+            repo.dirstate.setparents(newid, node.nullid)
+    finally:
+        wlock.release()
+
 
 def graftwrapper(orig, ui, repo, *revs, **kwargs):
     kwargs = dict(kwargs)
diff -r 4e0f1aae8d24 -r d2531a747ff5 tests/test-evolve.t
--- a/tests/test-evolve.t	Thu Aug 23 12:51:34 2012 +0200
+++ b/tests/test-evolve.t	Thu Aug 23 12:51:06 2012 +0200
@@ -526,7 +526,7 @@
   
   $ hg touch
   $ glog
-  @  9:7a2f49fdcf11@default(draft) conflict
+  @  9:*@default(draft) conflict (glob)
   |
   o  6:acb28cd497b7@default(draft) add 1
   |
@@ -540,7 +540,7 @@
   
   $ hg touch .
   $ glog
-  @  10:ce7e3d9b3afe@default(draft) conflict
+  @  10:*@default(draft) conflict (glob)
   |
   o  6:acb28cd497b7@default(draft) add 1
   |
@@ -552,4 +552,25 @@
   |/
   o  0:8685c6d34325@default(draft) add 0
   
- 
+
+Test fold
+
+  $ hg fold 6::10
+  2 changesets folded
+  $ glog
+  @  11:*@default(draft) add 1 (glob)
+  |
+  o  5:0b9e50c35132@default(draft) add 3
+  |
+  o  4:ce341209337f@default(draft) add 4
+  |
+  | o  1:73d38bb17fd7@default(draft) add 1
+  |/
+  o  0:8685c6d34325@default(draft) add 0
+  
+  $ hg log -r 11 --template '{desc}\n'
+  add 1
+  
+  ***
+  
+  conflict