view tests/test-rebase-keep-branch.out @ 8849:80cc4b1a62d0

compare grep result between target and its parent

I found that typical case is that grep target is added at (*) revision
in the tree shown below.

     +--- 1(*) --- 3
     0
     +--- 2 ------ 4

Now, I expect 'hg grep --all' to show only rev:1 which is first
appearance of target line.

But 'hg grep --all' will tell:

  target line dis-appeared at 3 => 4
  target line     appeared at 2 => 3
  target line dis-appeared at 1 => 2
  target line     appeared at 0 => 1

because current 'hg grep' implementation compares not between target
revision and its parent, but between neighbor revisions in walkthrough
order.

I checked performance of this patch by "hg grep --follow --all
walkchangerevs" on whole Mercurial repo, and patched version could
complete as fast as un-patched one.

0 files updated, 0 files merged, 2 files removed, 0 files unresolved
marked working directory as branch notdefault
created new head
@  4:r1:notdefault
|
| o  3:l2:
| |
| o  2:l1:
|/
o  1:c2:
|
o  0:c1:


% Rebase a branch while preserving the branch name
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
saving bundle to 
adding branch
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
rebase completed
@  4:r1:notdefault
|
o  3:l2:
|
o  2:l1:
|
o  1:c2:
|
o  0:c1:

% dirstate branch should be "notdefault"
notdefault