[PATCH 1/2] date.c: allow fractional second part of ISO-8601

["Đoàn Trần Công Danh" <congdanhqx@gmail.com>]

git-commit(1) says ISO-8601 is one of our supported date format.
However, we only support RFC-3339 date format.

We can either:
- Update documentation from ISO-8601 to RFC-3339
- Add full support for ISO-8601

This series will try to add full support for ISO-8601.

Reported-by: Brian M. Carlson <sandals@crustytoothpaste.net>
Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
---
 date.c          | 2 ++
 t/t0006-date.sh | 1 +
 2 files changed, 3 insertions(+)

diff --git a/date.c b/date.c
index b0d9a8421d..2f37397beb 100644
--- a/date.c
+++ b/date.c
@@ -556,6 +556,8 @@ static int match_multi_number(timestamp_t num, char c, const char *date,
 	case ':':
 		if (num3 < 0)
 			num3 = 0;
+		else if (*end == '.' && isdigit(end[1]))
+			strtol(end + 1, &end, 10);
 		if (num < 25 && num2 >= 0 && num2 < 60 && num3 >= 0 && num3 <= 60) {
 			tm->tm_hour = num;
 			tm->tm_min = num2;
diff --git a/t/t0006-date.sh b/t/t0006-date.sh
index d9fcc829a9..05c914a200 100755
--- a/t/t0006-date.sh
+++ b/t/t0006-date.sh
@@ -81,6 +81,7 @@ check_parse 2008-02 bad
 check_parse 2008-02-14 bad
 check_parse '2008-02-14 20:30:45' '2008-02-14 20:30:45 +0000'
 check_parse '2008-02-14 20:30:45 -0500' '2008-02-14 20:30:45 -0500'
+check_parse '2008-02-14 20:30:45.019-04:00' '2008-02-14 20:30:45 -0400'
 check_parse '2008-02-14 20:30:45 -0015' '2008-02-14 20:30:45 -0015'
 check_parse '2008-02-14 20:30:45 -5' '2008-02-14 20:30:45 +0000'
 check_parse '2008-02-14 20:30:45 -5:' '2008-02-14 20:30:45 +0000'
-- 
2.26.0.485.g518673e55f