Re: [PATCH] format-patch: show 0/1 and 1/1 for singleton patch with cover letter

[Junio C Hamano <gitster@pobox.com>]

Junio C Hamano <gitster@pobox.com> writes:

> This obviously changes the behaviour, but I do not think of a reason
> why this change is a bad idea.  

>> diff --git a/builtin/log.c b/builtin/log.c
>> index 92dc34dcb0cc..8e6100fb0c5b 100644
>> --- a/builtin/log.c
>> +++ b/builtin/log.c
>> @@ -1676,7 +1676,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
>>  		/* nothing to do */
>>  		return 0;
>>  	total = nr;
>> -	if (!keep_subject && auto_number && total > 1)
>> +	if (!keep_subject && auto_number && (total > 1 || cover_letter))
>>  		numbered = 1;
>>  	if (numbered)
>>  		rev.total = total + start_number - 1;

Actually there is a very good reason why this patch is not good
(yet).  When the --cover option is not specified on the command
line, cover_letter is -1 (use configuration or turn it on only when
it is a multi-patch series) at this point.

I think you would have noticed it if you ran any format-patch tests.
t/t4021-format-patch-numbered.sh fails at the very beginning.

With the attached SQUASH, existing tests pass, which is a strong
sign that this new feature needs to be protected by a new test in
the t4021 script to make sure other people would not break it in the
future.

 builtin/log.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/builtin/log.c b/builtin/log.c
index e50d361..b7bfeb9 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1650,16 +1650,16 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 		/* nothing to do */
 		return 0;
 	total = nr;
-	if (!keep_subject && auto_number && (total > 1 || cover_letter))
-		numbered = 1;
-	if (numbered)
-		rev.total = total + start_number - 1;
 	if (cover_letter == -1) {
 		if (config_cover_letter == COVER_AUTO)
 			cover_letter = (total > 1);
 		else
 			cover_letter = (config_cover_letter == COVER_ON);
 	}
+	if (!keep_subject && auto_number && (total > 1 || cover_letter))
+		numbered = 1;
+	if (numbered)
+		rev.total = total + start_number - 1;
 
 	if (!signature) {
 		; /* --no-signature inhibits all signatures */