diff --stat: report mode-only changes for binary files like text files

Mode-only changes to binary files without content change were reported as
if they were rewritten, but text files in the same situation were reported
as "unchanged". Let's treat binary files like text files here, and simply
say that they are unchanged.

Output of --shortstat is modified in the same way.

Reported-by: Martin Mareš <mj@ucw.cz>
Signed-off-by: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff.c b/diff.c
index 22288b0106258e4f2c170f9e51dbf72f563179bd..e61ccd1123fcb909d72c002e61cd37c1ae5b49d7 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -1583,8 +1583,12 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
                if (data->files[i]->is_binary) {
                        fprintf(options->file, "%s", line_prefix);
                        show_name(options->file, prefix, name, len);
-                       fprintf(options->file, "  Bin ");
-                       fprintf(options->file, "%s%"PRIuMAX"%s",
+                       fprintf(options->file, "  Bin");
+                       if (!added && !deleted) {
+                               putc('\n', options->file);
+                               continue;
+                       }
+                       fprintf(options->file, " %s%"PRIuMAX"%s",
                                del_c, deleted, reset);
                        fprintf(options->file, " -> ");
                        fprintf(options->file, "%s%"PRIuMAX"%s",
@@ -1657,17 +1661,16 @@ static void show_shortstats(struct diffstat_t *data, struct diff_options *option
                return;
 
        for (i = 0; i < data->nr; i++) {
-               if (!data->files[i]->is_binary &&
-                   !data->files[i]->is_unmerged) {
-                       int added = data->files[i]->added;
-                       int deleted= data->files[i]->deleted;
-                       if (!data->files[i]->is_renamed &&
-                           (added + deleted == 0)) {
-                               total_files--;
-                       } else {
-                               adds += added;
-                               dels += deleted;
-                       }
+               int added = data->files[i]->added;
+               int deleted= data->files[i]->deleted;
+
+               if (data->files[i]->is_unmerged)
+                       continue;
+               if (!data->files[i]->is_renamed && (added + deleted == 0)) {
+                       total_files--;
+               } else {
+                       adds += added;
+                       dels += deleted;
                }
        }
        if (options->output_prefix) {
@@ -2377,8 +2380,13 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
 
        if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) {
                data->is_binary = 1;
-               data->added = diff_filespec_size(two);
-               data->deleted = diff_filespec_size(one);
+               if (!hashcmp(one->sha1, two->sha1)) {
+                       data->added = 0;
+                       data->deleted = 0;
+               } else {
+                       data->added = diff_filespec_size(two);
+                       data->deleted = diff_filespec_size(one);
+               }
        }
 
        else if (complete_rewrite) {

diff --git a/t/t4006-diff-mode.sh b/t/t4006-diff-mode.sh
index 392dfeff57d0b1030e14c78bac105ac0f7183eb8..693bfc4a521825e4c2c4267f8ba7e36aae2e7033 100755 (executable)
--- a/t/t4006-diff-mode.sh
+++ b/t/t4006-diff-mode.sh
@@ -46,18 +46,12 @@ test_expect_success '--shortstat output after text chmod' '
 
 test_expect_success '--stat output after binary chmod' '
        test_chmod +x binbin &&
-       cat >expect <<-EOF &&
-        binbin |  Bin 1024 -> 1024 bytes
-        1 file changed, 0 insertions(+), 0 deletions(-)
-       EOF
+       echo " 0 files changed" >expect &&
        git diff HEAD --stat >actual &&
        test_cmp expect actual
 '
 
 test_expect_success '--shortstat output after binary chmod' '
-       cat >expect <<-EOF &&
-        1 file changed, 0 insertions(+), 0 deletions(-)
-       EOF
        git diff HEAD --shortstat >actual &&
        test_cmp expect actual
 '