From 0f369a9231b2c67748f4f0c2dbb33ebdc2890478 Mon Sep 17 00:00:00 2001 From: Arnout Vandecappelle Date: Tue, 21 Mar 2017 01:06:57 +0100 Subject: [PATCH] download/git: create GNU format tar files On most distros, the tar format defaults to GNU. However, at build time the default format may be changed to posix. Also, future versions of tar will default to posix. Since we want the tarballs created by the git download method to be reproducible (so their hash can be checked), we should explicitly specify the format. Since existing tarballs on sources.buildroot.org use the GNU format, and also the existing hashes in the *.hash files are based on GNU format tarballs, we use the GNU format. In addition, the Posix format encodes atime and ctime as well as mtime, but tar offers no option like --mtime to override them. In the GNU format, atime and ctime are only encoded if the --incremental option is given. Signed-off-by: Arnout Vandecappelle (Essensium/Mind) Cc: Peter Seiderer Signed-off-by: Thomas Petazzoni --- support/download/git | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/support/download/git b/support/download/git index 7921411835..056057c700 100755 --- a/support/download/git +++ b/support/download/git @@ -94,6 +94,8 @@ popd >/dev/null # Generate the archive, sort with the C locale so that it is reproducible find "${basename}" -not -type d >"${basename}.list" LC_ALL=C sort <"${basename}.list" >"${basename}.list.sorted" -tar cf - --numeric-owner --owner=0 --group=0 --mtime="${date}" \ +# Create GNU-format tarballs, since that's the format of the tarballs on +# sources.buildroot.org and used in the *.hash files +tar cf - --numeric-owner --owner=0 --group=0 --mtime="${date}" --format=gnu \ -T "${basename}.list.sorted" >"${output}.tar" gzip -n <"${output}.tar" >"${output}" -- 2.30.2