[Reproducible-builds] Bug#835129: dateutils: please make the build reproducible

[Chris Lamb]

Source: dateutils
Version: 0.3.1-1.1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org

Hi,

Whilst working on the Reproducible Builds effort [0], I noticed
that dateutils could not be built reproducibly.

Patch attached.

 [0] https://reproducible-builds.org/


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
-------------- next part --------------
--- a/debian/patches/0002-reproducible-build.diff	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/0002-reproducible-build.diff	2016-08-22 20:22:06.728424663 +0100
@@ -0,0 +1,54 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby at debian.org>
+Last-Update: 2016-08-22
+
+--- dateutils-0.3.1.orig/build-aux/yuck.c
++++ dateutils-0.3.1/build-aux/yuck.c
+@@ -1349,6 +1349,38 @@ bollocks:
+ 	_exit(EXIT_FAILURE);
+ }
+ 
++static time_t
++get_current_time(void)
++{
++	time_t now;
++	char *source_date_epoch, *endptr;
++	unsigned long long epoch;
++
++	source_date_epoch = getenv("SOURCE_DATE_EPOCH");
++
++	if (!source_date_epoch) {
++		return time(NULL);
++	}
++
++	errno = 0;
++	epoch = strtoull(source_date_epoch, &endptr, 10);
++
++	if ((errno == ERANGE && (epoch == ULLONG_MAX || epoch == 0)) || (errno != 0 && epoch == 0)) {
++		now = (time_t)-1;
++	} else if (endptr == source_date_epoch) {
++		now = (time_t)-1;
++	} else if (*endptr != '\0') {
++		now = (time_t)-1;
++	} else if (epoch > ULONG_MAX) {
++		now = (time_t)-1;
++	} else {
++		now = (time_t)epoch;
++	}
++
++	return now;
++}
++
++
+ 
+ static int
+ wr_pre(void)
+@@ -1432,7 +1464,7 @@ wr_man_date(void)
+ 	char buf[32U];
+ 	int rc = 0;
+ 
+-	if ((now = time(NULL)) == (time_t)-1) {
++	if ((now = get_current_time()) == (time_t)-1) {
+ 		rc = -1;
+ 	} else if ((tp = gmtime(&now)) == NULL) {
+ 		rc = -1;
--- a/debian/patches/series	2016-08-22 20:01:29.991392761 +0100
--- b/debian/patches/series	2016-08-22 20:17:05.127120394 +0100
@@ -1 +1,2 @@
 0001-do-not-use-march-native-compiler-flags.diff
+0002-reproducible-build.diff