Re: [PATCH v2 2/6] date: make "local" orthogonal to date format

[John Keeping <john@keeping.me.uk>]

On Tue, Sep 01, 2015 at 03:16:50PM -0700, Junio C Hamano wrote:
> John Keeping <john@keeping.me.uk> writes:
> 
> > This is Jeff's original patch with my fixup for DATE_STRFTIME squashed
> > in and a new change to reject "raw-local" (in both Documentation/ and
> > date.c).
> 
> Even in --date=raw, we do show the timezone offset, so I do not
> necessarily agree that raw-local is nonsensical.  That's the only
> difference between the one I queued yesterday and this one.

I suspect it depends on the interpretation of "raw"; the code currently
interprets raw to mean "exactly what exists in the commit/tag", in which
case converting it to the local timezone is wrong.  But the
documentation describes "raw" as "the raw Git %s %z format", and if we
interpret it to mean "Git's internal date format" then "raw-local" makes
sense.

The alternative would be the patch below as a preparatory step.

-- >8 --
diff --git a/date.c b/date.c
index f048416..345890f 100644
--- a/date.c
+++ b/date.c
@@ -175,12 +175,6 @@ const char *show_date(unsigned long time, int tz, const struct date_mode *mode)
 	struct tm *tm;
 	static struct strbuf timebuf = STRBUF_INIT;
 
-	if (mode->type == DATE_RAW) {
-		strbuf_reset(&timebuf);
-		strbuf_addf(&timebuf, "%lu %+05d", time, tz);
-		return timebuf.buf;
-	}
-
 	if (mode->type == DATE_RELATIVE) {
 		struct timeval now;
 
@@ -193,6 +187,12 @@ const char *show_date(unsigned long time, int tz, const struct date_mode *mode)
 	if (mode->local)
 		tz = local_tzoffset(time);
 
+	if (mode->type == DATE_RAW) {
+		strbuf_reset(&timebuf);
+		strbuf_addf(&timebuf, "%lu %+05d", time, tz);
+		return timebuf.buf;
+	}
+
 	tm = time_to_tm(time, tz);
 	if (!tm) {
 		tm = time_to_tm(0, 0);