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download/git: force gzip compression level 6

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Force gzip compression level 6 when calculating hash of a downloaded GIT repo.
To make sure the tar->gzip->checksum chain always provides consistent result.`

The script was relying on the default compression level, which must not be
necessarily consistent among different gzip versions. The level 6 is gzip's
current default compression level.

Signed-off-by: Petr Kulhavy <brain@jikos.cz>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Petr Kulhavy 2017-09-12 00:13:40 +02:00 committed by Peter Korsgaard
parent 81bf606d16
commit 04a22cf1b5
1 changed files with 1 additions and 1 deletions
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support/download/git
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@ -101,4 +101,4 @@ LC_ALL=C sort <"${basename}.list" >"${basename}.list.sorted"
# 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" >"${output}"
gzip -6 -n <"${output}.tar" >"${output}"