admin/git
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

diff: support ^! for merges

Browse Source 
revision.c::handle_revision_arg_1() resolves <rev>^! by first adding the
negated parents and then <rev> itself.  builtin_diff_combined() expects
the first tree to be the merge and the remaining ones to be the parents,
though.  This mismatch results in bogus diff output.

Remember the first tree that doesn't belong to a parent and use it
instead of blindly picking the first one.  This makes "git diff <rev>^!"
consistent with "git show <rev>^!".

Reported-by: Tim Jaacks <tim.jaacks@garz-fricke.com>
Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe
2022-10-01 12:28:07 +02:00
committed by Junio C Hamano
parent 9f91da752f
commit a79c6b6081
3 changed files with 32 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
builtin/diff.c
View File

@@ -209,7 +209,7 @@ static int builtin_diff_tree(struct rev_info *revs,
static int builtin_diff_combined(struct rev_info *revs,
int argc, const char **argv,
struct object_array_entry *ent,
int ents)
int ents, int first_non_parent)
{
struct oid_array parents = OID_ARRAY_INIT;
int i;
@@ -217,11 +217,18 @@ static int builtin_diff_combined(struct rev_info *revs,
if (argc > 1)
usage(builtin_diff_usage);
if (first_non_parent < 0)
die(_("no merge given, only parents."));
if (first_non_parent >= ents)
BUG("first_non_parent out of range: %d", first_non_parent);
diff_merges_set_dense_combined_if_unset(revs);
for (i = 1; i < ents; i++)
oid_array_append(&parents, &ent[i].item->oid);
diff_tree_combined(&ent[0].item->oid, &parents, revs);
for (i = 0; i < ents; i++) {
if (i != first_non_parent)
oid_array_append(&parents, &ent[i].item->oid);
}
diff_tree_combined(&ent[first_non_parent].item->oid, &parents, revs);
oid_array_clear(&parents);
return 0;
}
@@ -385,6 +392,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
int i;
struct rev_info rev;
struct object_array ent = OBJECT_ARRAY_INIT;
int first_non_parent = -1;
int blobs = 0, paths = 0;
struct object_array_entry *blob[2];
int nongit = 0, no_index = 0;
@@ -543,6 +551,10 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
continue;
obj->flags |= flags;
add_object_array(obj, name, &ent);
if (first_non_parent < 0 &&
(i >= rev.cmdline.nr || /* HEAD by hand. */
rev.cmdline.rev[i].whence != REV_CMD_PARENTS_ONLY))
first_non_parent = ent.nr - 1;
} else if (obj->type == OBJ_BLOB) {
if (2 <= blobs)
die(_("more than two blobs given: '%s'"), name);
@@ -590,7 +602,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
&ent.objects[0], &ent.objects[1]);
} else
result = builtin_diff_combined(&rev, argc, argv,
ent.objects, ent.nr);
ent.objects, ent.nr,
first_non_parent);
result = diff_result_code(&rev.diffopt, result);
if (1 < rev.diffopt.skip_stat_unmatch)
refresh_index_quietly();