When we see no context nor deleted line in the patch, we used to declare
that the patch creates a new file. But some people create an empty file
and then apply a patch to it. Similarly, a patch that delete everything
is not a deletion patch either.
This commit corrects these two issues. Together with the previous commit,
it allows a diff between an empty file and a line-ful file to be treated
as both creation patch and "add stuff to an existing empty file",
depending on the context. A new test t4126 demonstrates the fix.
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
builtin-apply.c | 15 ------------
t/t4126-apply-empty.sh | 60 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 60 insertions(+), 15 deletions(-)
create mode 100755 t/t4126-apply-empty.sh
diff --git a/builtin-apply.c b/builtin-apply.c
index 10b1f88..1540f28 100644
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -1143,21 +1143,6 @@ static int parse_single_patch(char *line, unsigned long size, struct patch *patc
if (patch->is_delete < 0 &&
(newlines || (patch->fragments && patch->fragments->next)))
patch->is_delete = 0;
- if (!unidiff_zero || context) {
- /* If the user says the patch is not generated with
- * --unified=0, or if we have seen context lines,
- * then not having oldlines means the patch is creation,
- * and not having newlines means the patch is deletion.
- */
- if (patch->is_new < 0 && !oldlines) {
- patch->is_new = 1;
- patch->old_name = NULL;
- }
- if (patch->is_delete < 0 && !newlines) {
- patch->is_delete = 1;
- patch->new_name = NULL;
- }
- }
if (0 < patch->is_new && oldlines)
die("new file %s depends on old contents", patch->new_name);
diff --git a/t/t4126-apply-empty.sh b/t/t4126-apply-empty.sh
new file mode 100755
index 0000000..6641571
--- /dev/null
+++ b/t/t4126-apply-empty.sh
@@ -0,0 +1,60 @@
+#!/bin/sh
+
+test_description='apply empty'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+ >empty &&
+ git add empty &&
+ test_tick &&
+ git commit -m initial &&
+ for i in a b c d e
+ do
+ echo $i
+ done >empty &&
+ cat empty >expect &&
+ git diff |
+ sed -e "/^diff --git/d" \
+ -e "/^index /d" \
+ -e "s|a/empty|empty.orig|" \
+ -e "s|b/empty|empty|" >patch0 &&
+ sed -e "s|empty|missing|" patch0 >patch1 &&
+ >empty &&
+ git update-index --refresh
+'
+
+test_expect_success 'apply empty' '
+ git reset --hard &&
+ >empty &&
+ rm -f missing &&
+ git apply patch0 &&
+ test_cmp expect empty
+'
+
+test_expect_success 'apply --index empty' '
+ git reset --hard &&
+ >empty &&
+ rm -f missing &&
+ git apply --index patch0 &&
+ test_cmp expect empty &&
+ git diff --exit-code
+'
+
+test_expect_success 'apply create' '
+ git reset --hard &&
+ >empty &&
+ rm -f missing &&
+ git apply patch1 &&
+ test_cmp expect missing
+'
+
+test_expect_success 'apply --index create' '
+ git reset --hard &&
+ >empty &&
+ rm -f missing &&
+ git apply --index patch1 &&
+ test_cmp expect missing &&
+ git diff --exit-code
+'
+
--
1.5.5.1.443.g123e3
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