Make the build reproducible if SOURCE_DATE_EPOCH is set.

Signed-off-by: Stephen M. Cameron <stephenmcameron@gmail.com>
smcameron · Jan 18, 2017 · c890eb3 · c890eb3
1 parent 9d77b4c
commit c890eb3
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/stamp.c b/stamp.c
@@ -7,10 +7,18 @@ int main(int argc, char *argv[])
 {
 	struct timeval tv;
 	int uid;
+	char *source_date_epoch;
 
 	gettimeofday(&tv, NULL);
 	uid = getuid();
 
+	source_date_epoch = getenv("SOURCE_DATE_EPOCH");
+	if (source_date_epoch) {
+		printf("static int builder = 0;\n");
+		printf("static uint64_t builtat = %s;\n", source_date_epoch);
+		exit(0);
+	}
+
 	printf("static int builder = %d;\n", uid);
 	printf("static uint64_t builtat = %d;\n", tv.tv_sec);