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diff: use pending "path" if it is available

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There's a subtle distinction between "name" and "path" for a
blob that we resolve: the name is what the user told us on
the command line, and the path is what we traversed when
finding the blob within a tree (if we did so).

When we diff blobs directly, we use "name", but "path" is
more likely to be useful to the user (it will find the
correct .gitattributes, and give them a saner diff header).

We still have to fall back to using the name for some cases
(i.e., any blob reference that isn't of the form tree:path).
That's the best we can do in such a case.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2017-05-19 08:59:15 -04:00 committed by Junio C Hamano
parent d04ec74b17
commit 158b06caee
2 changed files with 8 additions and 3 deletions
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7
builtin/diff.c
View File

@ -23,6 +23,11 @@
static const char builtin_diff_usage[] =
"git diff [<options>] [<commit> [<commit>]] [--] [<path>...]";
static const char *blob_path(struct object_array_entry *entry)
{
return entry->path ? entry->path : entry->name;
}
static void stuff_change(struct diff_options *opt,
unsigned old_mode, unsigned new_mode,
const struct object_id *old_oid,
@ -110,7 +115,7 @@ static int builtin_diff_blobs(struct rev_info *revs,
blob[0]->mode, blob[1]->mode,
&blob[0]->item->oid, &blob[1]->item->oid,
1, 1,
blob[0]->name, blob[1]->name);
blob_path(blob[0]), blob_path(blob[1]));
diffcore_std(&revs->diffopt);
diff_flush(&revs->diffopt);
return 0;

4
t/t4063-diff-blobs.sh
View File

@ -55,7 +55,7 @@ test_expect_success 'diff by tree:path (run)' '
test_expect_success 'index of tree:path diff' '
check_index $sha1_one $sha1_two
'
test_expect_failure 'tree:path diff uses filenames as paths' '
test_expect_success 'tree:path diff uses filenames as paths' '
check_paths one two
'
test_expect_success 'tree:path diff shows mode change' '
@ -68,7 +68,7 @@ test_expect_success 'diff by ranged tree:path' '
test_expect_success 'index of ranged tree:path diff' '
check_index $sha1_one $sha1_two
'
test_expect_failure 'ranged tree:path diff uses filenames as paths' '
test_expect_success 'ranged tree:path diff uses filenames as paths' '
check_paths one two
'
test_expect_success 'ranged tree:path diff shows mode change' '