Reproducible U-Boot build support, using SOURCE_DATE_EPOCH

[karo-tx-uboot.git] / tools / default_image.c

diff --git a/tools/default_image.c b/tools/default_image.c
index cf5c0d4393b0937b55bb684023a43a2c0d62f9cd..18940af5b532a1a0e3c6e6d28dc027e48f05b836 100644 (file)
--- a/tools/default_image.c
+++ b/tools/default_image.c
@@ -88,6 +88,9 @@ static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
                                struct image_tool_params *params)
 {
        uint32_t checksum;
+       char *source_date_epoch;
+       struct tm *time_universal;
+       time_t time;
 
        image_header_t * hdr = (image_header_t *)ptr;
 
@@ -96,9 +99,25 @@ static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
                                sizeof(image_header_t)),
                        sbuf->st_size - sizeof(image_header_t));
 
+       source_date_epoch = getenv("SOURCE_DATE_EPOCH");
+       if (source_date_epoch != NULL) {
+               time = (time_t) strtol(source_date_epoch, NULL, 10);
+
+               time_universal = gmtime(&time);
+               if (time_universal == NULL) {
+                       fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid\n",
+                               __func__);
+                       time = 0;
+               } else {
+                       time = mktime(time_universal);
+               }
+       } else {
+               time = sbuf->st_mtime;
+       }
+
        /* Build new header */
        image_set_magic(hdr, IH_MAGIC);
-       image_set_time(hdr, sbuf->st_mtime);
+       image_set_time(hdr, time);
        image_set_size(hdr, sbuf->st_size - sizeof(image_header_t));
        image_set_load(hdr, params->addr);
        image_set_ep(hdr, params->ep);