# HG changeset patch
# User Pulkit Goyal <7895pulkit@gmail.com>
# Date 1598263534 -19800
# Node ID 7684124726632e5d2ad6bc9822403c92b18d7b2f
# Parent  8c02c6262a5ea25923455334040556be03881260
merge: store cases when a file is absent post merge in commitinfo

Some merges can result in file being absent form working directory. This can be
one of file was kept deleted or file was removed by merge code.

User might revert the file back before committing. In such cases we will like to
have better handling and create new filenodes.

We store this info in mergestate as commitinfo so that we can use it while
committing to create new filenode if required.

Differential Revision: https://phab.mercurial-scm.org/D9003

diff -r 8c02c6262a5e -r 768412472663 mercurial/merge.py
--- a/mercurial/merge.py	Mon Sep 14 15:08:15 2020 +0530
+++ b/mercurial/merge.py	Mon Aug 24 15:35:34 2020 +0530
@@ -923,6 +923,15 @@
                     mresult.addfile(
                         f, mergestatemod.ACTION_REMOVE, None, b'other deleted',
                     )
+                    if branchmerge:
+                        # the file must be absent after merging,
+                        # howeber the user might make
+                        # the file reappear using revert and if they does,
+                        # we force create a new node
+                        mresult.addcommitinfo(
+                            f, b'merge-removal-candidate', b'yes'
+                        )
+
             else:  # file not in ancestor, not in remote
                 mresult.addfile(
                     f,
@@ -1033,6 +1042,12 @@
                     None,
                     b'local not present, remote unchanged',
                 )
+                if branchmerge:
+                    # the file must be absent after merging
+                    # however the user might make
+                    # the file reappear using revert and if they does,
+                    # we force create a new node
+                    mresult.addcommitinfo(f, b'merge-removal-candidate', b'yes')
 
     if repo.ui.configbool(b'experimental', b'merge.checkpathconflicts'):
         # If we are merging, look for path conflicts.
diff -r 8c02c6262a5e -r 768412472663 tests/test-merge-criss-cross.t
--- a/tests/test-merge-criss-cross.t	Mon Sep 14 15:08:15 2020 +0530
+++ b/tests/test-merge-criss-cross.t	Mon Aug 24 15:35:34 2020 +0530
@@ -682,7 +682,9 @@
   extra: the-file (merge-removal-candidate = yes)
 #else
   $ hg debugmergestate
-  no merge state found
+  local (working copy): adfd88e5d7d3d3e22bdd26512991ee64d59c1d8f
+  other (merge rev): e9b7081317232edce73f7ad5ae0b7807ff5c326a
+  extra: the-file (merge-removal-candidate = yes)
 #endif
 
 (merging a deletion with keeping → conflict)
@@ -697,7 +699,9 @@
   $ ls -1
   other-file
   $ hg debugmergestate
-  no merge state found
+  local (working copy): adfd88e5d7d3d3e22bdd26512991ee64d59c1d8f
+  other (merge rev): 5e3eccec60d88f94a7ba57c351f32cb24c15fe0c
+  extra: the-file (merge-removal-candidate = yes)
 
 (merging two deletion together → no conflict)
 
@@ -730,7 +734,9 @@
   extra: the-file (merge-removal-candidate = yes)
 #else
   $ hg debugmergestate
-  no merge state found
+  local (working copy): a4e0e44229dc130be2915b92c957c093f8c7ee3e
+  other (merge rev): e9b7081317232edce73f7ad5ae0b7807ff5c326a
+  extra: the-file (merge-removal-candidate = yes)
 #endif
 
 (merging a deletion with keeping → conflict)
@@ -745,7 +751,9 @@
   $ ls -1
   other-file
   $ hg debugmergestate
-  no merge state found
+  local (working copy): a4e0e44229dc130be2915b92c957c093f8c7ee3e
+  other (merge rev): 5e3eccec60d88f94a7ba57c351f32cb24c15fe0c
+  extra: the-file (merge-removal-candidate = yes)
 
 (merging two "keeping" together → no conflict)
 
@@ -795,7 +803,9 @@
   other-file
   the-file
   $ hg debugmergestate
-  no merge state found
+  local (working copy): 5e3eccec60d88f94a7ba57c351f32cb24c15fe0c
+  other (merge rev): a4e0e44229dc130be2915b92c957c093f8c7ee3e
+  extra: the-file (merge-removal-candidate = yes)
 
 (merging two "keeping" together → no conflict)
 
@@ -843,5 +853,7 @@
   extra: the-file (merge-removal-candidate = yes)
 #else
   $ hg debugmergestate
-  no merge state found
+  local (working copy): e9b7081317232edce73f7ad5ae0b7807ff5c326a
+  other (merge rev): a4e0e44229dc130be2915b92c957c093f8c7ee3e
+  extra: the-file (merge-removal-candidate = yes)
 #endif