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-rw-r--r--gnu/packages/patches/ttfautohint-source-date-epoch.patch70
1 files changed, 70 insertions, 0 deletions
diff --git a/gnu/packages/patches/ttfautohint-source-date-epoch.patch b/gnu/packages/patches/ttfautohint-source-date-epoch.patch
new file mode 100644
index 0000000000..e42fdbf6b0
--- /dev/null
+++ b/gnu/packages/patches/ttfautohint-source-date-epoch.patch
@@ -0,0 +1,70 @@
+Honour an external definition of SOURCE_DATE_EPOCH when updating the embedded
+modification date in TTF/TTC files.
+
+--- a/lib/tatime.c
++++ b/lib/tatime.c
+@@ -15,6 +15,8 @@
+
+ #include <time.h>
+ #include <stdint.h>
++#include <errno.h>
++#include <limits.h>
+
+ #include "ta.h"
+
+@@ -27,12 +29,51 @@ TA_get_current_time(FT_ULong* high,
+ {
+ /* there have been 24107 days between January 1st, 1904 (the epoch of */
+ /* OpenType), and January 1st, 1970 (the epoch of the `time' function) */
+- TA_ULongLong seconds_to_1970 = 24107 * 24 * 60 * 60;
+- TA_ULongLong seconds_to_today = seconds_to_1970 + (TA_ULongLong)time(NULL);
++ const TA_ULongLong seconds_to_1970 = 24107 * 24 * 60 * 60;
++ TA_ULongLong seconds_to_build;
+
++ time_t now;
++ char *source_date_epoch, *endptr;
++ TA_ULongLong epoch;
++ source_date_epoch = getenv("SOURCE_DATE_EPOCH");
++ if (source_date_epoch) {
++ errno = 0;
++ epoch = strtoull(source_date_epoch, &endptr, 10);
++ if ((errno == ERANGE && (epoch == ULLONG_MAX || epoch == 0))
++ || (errno != 0 && epoch == 0)) {
++ fprintf(stderr,
++ "Environment variable $SOURCE_DATE_EPOCH: strtoull: %s\n",
++ strerror(errno));
++ exit(EXIT_FAILURE);
++ }
++ if (endptr == source_date_epoch) {
++ fprintf(stderr,
++ "Environment variable $SOURCE_DATE_EPOCH: No digits were found: %s\n",
++ endptr);
++ exit(EXIT_FAILURE);
++ }
++ if (*endptr != '\0') {
++ fprintf(stderr,
++ "Environment variable $SOURCE_DATE_EPOCH: Trailing garbage: %s\n",
++ endptr);
++ exit(EXIT_FAILURE);
++ }
++ if (epoch > ULONG_MAX) {
++ fprintf(stderr,
++ "Environment variable $SOURCE_DATE_EPOCH: value must be smaller "
++ "than or equal to: %lu but was found to be: %llu \n",
++ ULONG_MAX, epoch);
++ exit(EXIT_FAILURE);
++ }
++ now = epoch;
++ } else {
++ now = time(NULL);
++ }
+
+- *high = (FT_ULong)(seconds_to_today >> 32);
+- *low = (FT_ULong)seconds_to_today;
++ seconds_to_build = seconds_to_1970 + (TA_ULongLong)now;
++
++ *high = (FT_ULong)(seconds_to_build >> 32);
++ *low = (FT_ULong)seconds_to_build;
+ }
+
+ /* end of tatime.c */