download.mk: improve download tarball reproducibility

Store only numeric user/group id. Group 0 is 'root' on linux and 'wheel' on
BSD and Mac OS X.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/include/download.mk b/include/download.mk
index 49d2bf3bace21c27b6faf1e1b0d09c17d05de258..3c6b4a20cf3dc349ea594846b7deb7c649cbc1d1 100644 (file)
--- a/include/download.mk
+++ b/include/download.mk
@@ -41,7 +41,7 @@ define dl_pack
        $(if $(dl_pack/$(call ext,$(1))),$(dl_pack/$(call ext,$(1))),$(dl_pack/unknown))
 endef
 define dl_tar_pack
-       $(TAR) --owner=0 --group=0 --sort=name $$$${TAR_TIMESTAMP:+--mtime="$$$$TAR_TIMESTAMP"} -c $(2) | $(call dl_pack,$(1))
+       $(TAR) --numeric-owner --owner=0 --group=0 --sort=name $$$${TAR_TIMESTAMP:+--mtime="$$$$TAR_TIMESTAMP"} -c $(2) | $(call dl_pack,$(1))
 endef
 
 define DownloadMethod/unknown