merge: do early copy to deal with issue636
Without copies/renames, merges source names are 1:1 with their
targets. Copies and renames introduce the possibility that there will
be two merges with the same input but different output. By doing the
copy to the destination name before the merge, the actual merge
becomes 1:1 again, and no source is the input to two different merges.
- add a preliminary scan to applyupdates to do copies
- for the merge action, pass the old name (for finding ancestors) and
the new name (for input to the merge) to filemerge
- eliminate the old post-merge copy
- lookup file contents from new name in filemerge
- pass new name to external merge helper
- report merge failure at new name
- add a test
1:f248da0d4c3e
0:9eca13a34789
f248da0d4c3e tip
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
9eca13a34789
9eca13a34789+
reverting file1
9eca13a34789
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
f248da0d4c3e tip
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
warning: conflicts during merge.
merging file1
merging file1 failed!
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
There are unresolved merges with locally modified files.
You can redo the full merge using:
hg update 0
hg update 1
diff -r f248da0d4c3e file1
--- a/file1
+++ b/file1
@@ -1,3 +1,7 @@ added file1
added file1
another line of text
+<<<<<<< my
+changed file1 different
+=======
changed file1
+>>>>>>> other
M file1
f248da0d4c3e+ tip
reverting file1
f248da0d4c3e tip
f248da0d4c3e tip
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
f248da0d4c3e tip