67 lines
1.6 KiB
Diff
67 lines
1.6 KiB
Diff
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Use deterministic SOURCE_DATE_EPOCH for embedded timestamps in generated documentation.
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Written by Eduard Sanou.
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https://bugzilla.gnome.org/show_bug.cgi?id=758148
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--- libxslt-1.1.28.orig/libexslt/date.c
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+++ libxslt-1.1.28/libexslt/date.c
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@@ -46,6 +46,7 @@
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#include "exslt.h"
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#include <string.h>
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+#include <errno.h>
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#ifdef HAVE_MATH_H
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#include <math.h>
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@@ -747,21 +748,46 @@ static exsltDateValPtr
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exsltDateCurrent (void)
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{
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struct tm localTm, gmTm;
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+ struct tm *tb = NULL;
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time_t secs;
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int local_s, gm_s;
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exsltDateValPtr ret;
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+ char *source_date_epoch;
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ret = exsltDateCreateDate(XS_DATETIME);
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if (ret == NULL)
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return NULL;
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- /* get current time */
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secs = time(NULL);
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+ /*
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+ * Allow the date and time to be set externally by an exported
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+ * environment variable to enable reproducible builds.
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+ */
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+ source_date_epoch = getenv("SOURCE_DATE_EPOCH");
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+ if (source_date_epoch) {
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+ errno = 0;
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+ secs = (time_t) strtol (source_date_epoch, NULL, 10);
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+ if (errno == 0) {
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+ tb = gmtime(&secs);
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+ if (tb == NULL) {
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+ /* SOURCE_DATE_EPOCH is not a valid date */
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+ return NULL;
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+ } else {
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+ localTm = *tb;
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+ }
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+ } else {
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+ /* SOURCE_DATE_EPOCH is not a valid number */
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+ return NULL;
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+ }
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+ } else {
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+ /* get current time */
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#if HAVE_LOCALTIME_R
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- localtime_r(&secs, &localTm);
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+ localtime_r(&secs, &localTm);
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#else
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- localTm = *localtime(&secs);
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+ localTm = *localtime(&secs);
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#endif
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+ }
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+
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/* get real year, not years since 1900 */
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ret->value.date.year = localTm.tm_year + 1900;
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