From: Phillip Wood <phillip.wood@xxxxxxxxxxxxx>
Commit fecc6f3a68 ("add -p: adjust offsets of subsequent hunks when one is
skipped", 2018-03-01) fixed adding hunks in the correct place when a
previous hunk has been skipped. However it did not address patches that
are applied in reverse. In that case we need to adjust the pre-image
offset so that when apply reverses the patch the post-image offset is
adjusted correctly. We subtract rather than add the delta as the patch
is reversed (the easiest way to think about it is to consider a hunk of
deletions that is skipped - in that case we want to reduce offset so we
need to subtract).
Signed-off-by: Phillip Wood <phillip.wood@xxxxxxxxxxxxx>
---
git-add--interactive.perl | 6 +++++-
t/t3701-add-interactive.sh | 8 ++++++++
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/git-add--interactive.perl b/git-add--interactive.perl
index 20eb81cc92..da5b4ec4bc 100755
--- a/git-add--interactive.perl
+++ b/git-add--interactive.perl
@@ -972,7 +972,11 @@ sub coalesce_overlapping_hunks {
next;
}
if ($ofs_delta) {
- $n_ofs += $ofs_delta;
+ if ($patch_mode_flavour{IS_REVERSE}) {
+ $o_ofs -= $ofs_delta;
+ } else {
+ $n_ofs += $ofs_delta;
+ }
$_->{TEXT}->[0] = format_hunk_header($o_ofs, $o_cnt,
$n_ofs, $n_cnt);
}
diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh
index 65dfbc033a..69991a3168 100755
--- a/t/t3701-add-interactive.sh
+++ b/t/t3701-add-interactive.sh
@@ -639,4 +639,12 @@ test_expect_success 'add -p patch editing works with pathological context lines'
test_cmp expected-2 actual
'
+test_expect_success 'checkout -p works with pathological context lines' '
+ test_write_lines a a a a a a >a &&
+ git add a &&
+ test_write_lines a b a b a b a b a b a > a&&
+ test_write_lines s n n y q | git checkout -p &&
+ test_write_lines a b a b a a b a b a >expect &&
+ test_cmp expect a
+'
test_done
--
gitgitgadget
