# HG changeset patch
# User Manuel Jacob <me@manueljacob.de>
# Date 1583939046 -3600
# Node ID dc3571a37b563f4f8e3eb1e55e5090974795253a
# Parent  240efc3ab4ddbb5aa894c23dfaa79ad789a93368
evolve: support ancestor of orphan split with unrelated changeset in between

This is done by searching for roots and heads within the range delimited on
both sides by the target revs instead of just within the target revs.

Example:

o 5
|
o 4
|
o 3
|
| * 2
| |
| x 1
|/
o 0

1 is obsoleted by 3 and 5. We are considering the case when 2 gets evolved.

Before the change, both roots and heads were [3, 5]. The user was offered a
choice between 3 and 5 as the destination.

After the change, roots are [3] and heads are [5]. 5 is chosen as the
destination.

diff -r 240efc3ab4dd -r dc3571a37b56 hgext3rd/evolve/utility.py
--- a/hgext3rd/evolve/utility.py	Wed Mar 11 18:50:39 2020 +0100
+++ b/hgext3rd/evolve/utility.py	Wed Mar 11 16:04:06 2020 +0100
@@ -139,8 +139,8 @@
     targets = obsutil.successorssets(repo, ctx.node())[0]
     assert targets
     targetrevs = [repo[r].rev() for r in targets]
-    roots = repo.revs(b'roots(%ld)', targetrevs)
-    heads = repo.revs(b'heads(%ld)', targetrevs)
+    roots = repo.revs(b'roots(%ld::%ld)', targetrevs, targetrevs)
+    heads = repo.revs(b'heads(%ld::%ld)', targetrevs, targetrevs)
     if len(roots) > 1 or len(heads) > 1:
         cheader = (_(b"ancestor of '%s' split over multiple topological"
                      b" branches.\nchoose an evolve destination:") %
diff -r 240efc3ab4dd -r dc3571a37b56 tests/test-evolve-split.t
--- a/tests/test-evolve-split.t	Wed Mar 11 18:50:39 2020 +0100
+++ b/tests/test-evolve-split.t	Wed Mar 11 16:04:06 2020 +0100
@@ -59,3 +59,29 @@
   $ hg evolve --rev "0::"
   move:[2] add uu
   atop:[4] _pp
+
+Split the changeset such that there's an unrelated changeset in between
+  $ hg --config extensions.strip= strip 4 -q
+  $ mkcommit bb
+  $ printf "pp" > pp;
+  $ hg add pp
+  $ hg commit -m "_pp"
+  $ hg prune --successor "desc(_oo) + desc(_pp)" -r "desc('oo+pp')" --split
+  1 changesets pruned
+  1 new orphan changesets
+  $ hg log -G
+  @  5:e4541785761d@default(draft) _pp
+  |
+  o  4:155f65ab6abc@default(draft) add bb
+  |
+  o  3:a7fdfda64c08@default(draft) _oo
+  |
+  | *  2:f52200b086ca@default(draft) add uu
+  | |
+  | x  1:d55647aaa0c6@default(draft) oo+pp
+  |/
+  o  0:58663bb03074@default(draft) add aa
+  
+  $ hg evolve --rev "0::"
+  move:[2] add uu
+  atop:[5] _pp