Add `human` format to test-tool

Add the human format support to the test tool so that
GIT_TEST_DATE_NOW can be used to specify the current time.

The get_time() helper function was created and and checks the
GIT_TEST_DATE_NOW environment variable.  If GIT_TEST_DATE_NOW is set,
then that date is used instead of the date returned by by
gettimeofday().

All calls to gettimeofday() were replaced by calls to get_time().

Renamed occurances of TEST_DATE_NOW to GIT_TEST_DATE_NOW since the
variable is now used in the get binary and not just in the test-tool.

Signed-off-by: Stephen P. Smith <ischis2@cox.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 17 insertions, 4 deletions

diff --git a/date.c b/date.c
index f731803..7b9e8fa 100644
--- a/date.c
+++ b/date.c
@@ -115,6 +115,19 @@ static int local_tzoffset(timestamp_t time)
 	return local_time_tzoffset((time_t)time, &tm);
 }
 
+static void get_time(struct timeval *now)
+{
+	const char *x;
+
+	x = getenv("GIT_TEST_DATE_NOW");
+	if (x) {
+		now->tv_sec = atoi(x);
+		now->tv_usec = 0;
+	}
+	else
+		gettimeofday(now, NULL);
+}
+
 void show_date_relative(timestamp_t time, int tz,
 			       const struct timeval *now,
 			       struct strbuf *timebuf)
@@ -228,7 +241,7 @@ static void show_date_normal(struct strbuf *buf, timestamp_t time, struct tm *tm
 	/* Show "today" times as just relative times */
 	if (hide.wday) {
 		struct timeval now;
-		gettimeofday(&now, NULL);
+		get_time(&now);
 		show_date_relative(time, tz, &now, buf);
 		return;
 	}
@@ -284,7 +297,7 @@ const char *show_date(timestamp_t time, int tz, const struct date_mode *mode)
 	if (mode->type == DATE_HUMAN) {
 		struct timeval now;
 
-		gettimeofday(&now, NULL);
+		get_time(&now);
 
 		/* Fill in the data for "current time" in human_tz and human_tm */
 		human_tz = local_time_tzoffset(now.tv_sec, &human_tm);
@@ -303,7 +316,7 @@ const char *show_date(timestamp_t time, int tz, const struct date_mode *mode)
 		struct timeval now;
 
 		strbuf_reset(&timebuf);
-		gettimeofday(&now, NULL);
+		get_time(&now);
 		show_date_relative(time, tz, &now, &timebuf);
 		return timebuf.buf;
 	}
@@ -1290,7 +1303,7 @@ timestamp_t approxidate_careful(const char *date, int *error_ret)
 		return timestamp;
 	}
 
-	gettimeofday(&tv, NULL);
+	get_time(&tv);
 	return approxidate_str(date, &tv, error_ret);
 }