When a commit changes a path P that used to be a file to a directory
and creates a new path P/X in it, "git show" would say that file P
was removed and file P/X was created for such a commit.
However, if we compare two directories, D1 and D2, where D1 has a
file D1/P in it and D2 has a directory D2/P under which there is a
file D2/P/X, and ask "git diff --no-index D1 D2" to show their
differences, we simply get a refusal "file/directory conflict".
Surely, that may be what GNU diff does, but we can do better and it
is easy to do so.
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
diff-no-index.c | 23 +++++++++++++++++++++--
t/t4053-diff-no-index.sh | 12 ++++++++++++
2 files changed, 33 insertions(+), 2 deletions(-)
diff --git a/diff-no-index.c b/diff-no-index.c
index 49c4536..0320605 100644
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -97,8 +97,27 @@ static int queue_diff(struct diff_options *o,
if (get_mode(name1, &mode1) || get_mode(name2, &mode2))
return -1;
- if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2))
- return error("file/directory conflict: %s, %s", name1, name2);
+ if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2)) {
+ struct diff_filespec *d1, *d2;
+
+ if (S_ISDIR(mode1)) {
+ /* 2 is file that is created */
+ d1 = noindex_filespec(NULL, 0);
+ d2 = noindex_filespec(name2, mode2);
+ name2 = NULL;
+ mode2 = 0;
+ } else {
+ /* 1 is file that is deleted */
+ d1 = noindex_filespec(name1, mode1);
+ d2 = noindex_filespec(NULL, 0);
+ name1 = NULL;
+ mode1 = 0;
+ }
+ /* emit that file */
+ diff_queue(&diff_queued_diff, d1, d2);
+
+ /* and then let the entire directory be created or deleted */
+ }
if (S_ISDIR(mode1) || S_ISDIR(mode2)) {
struct strbuf buffer1 = STRBUF_INIT;
diff --git a/t/t4053-diff-no-index.sh b/t/t4053-diff-no-index.sh
index 01eca4c..596dfe7 100755
--- a/t/t4053-diff-no-index.sh
+++ b/t/t4053-diff-no-index.sh
@@ -77,4 +77,16 @@ test_expect_success 'diff D F and diff F D' '
)
'
+test_expect_success 'turning a file into a directory' '
+ (
+ cd non/git &&
+ mkdir d e e/sub &&
+ echo 1 >d/sub &&
+ echo 2 >e/sub/file &&
+ printf "D\td/sub\nA\te/sub/file\n" >expect &&
+ test_must_fail git diff --no-index --name-status d e >actual &&
+ test_cmp expect actual
+ )
+'
+
test_done
--
2.3.4-475-g3180e2e
--
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