view tests/test-rebase-interruptions.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.

% Changes during an interruption - continue
@  4: E
|
o  3: D
|
| o  2: C
| |
| o  1: B
|/
o  0: A


% - Rebasing B onto E
merging A
warning: conflicts during merge.
merging A failed!
abort: fix unresolved conflicts with hg resolve then run hg rebase --continue

% - Force a commit on C during the interruption
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
@  6: Extra
|
| o  5: B
| |
| o  4: E
| |
| o  3: D
| |
o |  2: C
| |
o |  1: B
|/
o  0: A


% - Resume the rebasing
merging A
warning: conflicts during merge.
merging A failed!
abort: fix unresolved conflicts with hg resolve then run hg rebase --continue

% - Solve the conflict and go on
warning: new changesets detected on source branch, not stripping
rebase completed
@  7: C
|
| o  6: Extra
| |
o |  5: B
| |
o |  4: E
| |
o |  3: D
| |
| o  2: C
| |
| o  1: B
|/
o  0: A



% Changes during an interruption - abort
@  4: E
|
o  3: D
|
| o  2: C
| |
| o  1: B
|/
o  0: A


% Rebasing B onto E
merging A
warning: conflicts during merge.
merging A failed!
abort: fix unresolved conflicts with hg resolve then run hg rebase --continue

% Force a commit on B' during the interruption
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
@  6: Extra
|
o  5: B
|
o  4: E
|
o  3: D
|
| o  2: C
| |
| o  1: B
|/
o  0: A


% Abort the rebasing
warning: new changesets detected on target branch, not stripping
@  6: Extra
|
o  5: B
|
o  4: E
|
o  3: D
|
| o  2: C
| |
| o  1: B
|/
o  0: A