ipkg-build: suppress timestamps in gzip headers

When creating control.tar.gz, data.tar.gz and $package.ipk
tar compresses them with default gzip options.
This includes build timestamps in their gzip headers.
By setting the GZIP env variable to -n, gzip no longer embeds
them, which is a step towards reproducibility.

See also [1] for more detailed motivations.

[1]: https://wiki.debian.org/ReproducibleBuilds/About

Signed-off-by: Reiner Herrmann <reiner@reiner-h.de>

SVN-Revision: 46026
This commit is contained in:
Felix Fietkau 2015-06-18 06:41:45 +00:00
parent 535f58c362
commit 949d7e30e4

View file

@ -13,6 +13,7 @@ version=1.0
FIND="$(which find)"
FIND="${FIND:-$(which gfind)}"
TAR="${TAR:-$(which tar)}"
export GZIP="-n"
ipkg_extract_value() {
sed -e "s/^[^:]*:[[:space:]]*//"