diff mercurial/commit.py @ 46811:5a0b930cfb3e

commit: get info from mergestate whether a file was merged or not

While commiting a merge, the commit code does not know whether a file was merged
during `hg merge` or not. This leads the commit code to look for filelog
ancestor to choose parents of new filelog created on merge commit.
This leads to wrong results in some cases as demonstrated by previous patch.

From this patch, we start storing information about merged files in mergestate
in stateextras and then use that on commit to detect whether we need to set two
parents or not.

Differential Revision: https://phab.mercurial-scm.org/D10149

--- a/mercurial/commit.py	Wed Mar 17 20:06:35 2021 +0100
+++ b/mercurial/commit.py	Wed Mar 10 13:14:32 2021 +0530
@@ -361,6 +361,8 @@
     elif fparent2 != nullid:
         if ms.active() and ms.extras(fname).get(b'filenode-source') == b'other':
             fparent1, fparent2 = fparent2, nullid
+        elif ms.active() and ms.extras(fname).get(b'merged') != b'yes':
+            fparent1, fparent2 = fparent1, nullid
         # is one parent an ancestor of the other?
         else:
             fparentancestors = flog.commonancestorsheads(fparent1, fparent2)