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date: make "iso-strict" conforming for the UTC timezone 

ISO 8601-1:2020-12 specifies that a zero timezone offset must be denoted
with a "Z" suffix instead of the numeric "+00:00". Add the correponding
special case to show_date() and a new test.

Changing an established output format which might be depended on by
scripts is always problematic, but here we choose to adhere more closely
to the published standard.

Reported-by: Michael Osipov <michael.osipov@innomotics.com>
Signed-off-by: Beat Bolli <dev+git@drbeat.li>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Beat Bolli 2024-03-13 23:54:23 +01:00 committed by Junio C Hamano
parent 945115026a
commit 69e2bee1a3
2 changed files with 10 additions and 5 deletions
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14
date.c
View File

@ -342,14 +342,18 @@ const char *show_date(timestamp_t time, int tz, const struct date_mode *mode)
tm->tm_hour, tm->tm_min, tm->tm_sec,
tz);
else if (mode->type == DATE_ISO8601_STRICT) {
char sign = (tz >= 0) ? '+' : '-';
tz = abs(tz);
strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d",
tm->tm_year + 1900,
tm->tm_mon + 1,
tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec,
sign, tz / 100, tz % 100);
tm->tm_hour, tm->tm_min, tm->tm_sec);
if (tz == 0) {
strbuf_addch(&timebuf, 'Z');
} else {
strbuf_addch(&timebuf, tz >= 0 ? '+' : '-');
tz = abs(tz);
strbuf_addf(&timebuf, "%02d:%02d", tz / 100, tz % 100);
}
} else if (mode->type == DATE_RFC2822)
strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d",
weekday_names[tm->tm_wday], tm->tm_mday,

1
t/t0006-date.sh
View File

@ -46,6 +46,7 @@ check_show () {
TIME='1466000000 +0200'
check_show iso8601 "$TIME" '2016-06-15 16:13:20 +0200'
check_show iso8601-strict "$TIME" '2016-06-15T16:13:20+02:00'
check_show iso8601-strict "$(echo "$TIME" | sed 's/+0200$/+0000/')" '2016-06-15T14:13:20Z'
check_show rfc2822 "$TIME" 'Wed, 15 Jun 2016 16:13:20 +0200'
check_show short "$TIME" '2016-06-15'
check_show default "$TIME" 'Wed Jun 15 16:13:20 2016 +0200'