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opkg-build: clamp mtimes to SOURCE_DATE_EPOCH

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For reproducible builds, clamp mtimes bigger than SOURCE_DATE_EPOCH to
SOURCE_DATE_EPOCH (build generated files, usually).

Fixes bugzilla 13450

Tested-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Alejandro del Castillo <alejandro.delcastillo@ni.com>
This commit is contained in:
Alejandro del Castillo
2019-09-12 10:21:23 -05:00
parent 5163a74a59
commit c3cc956930
1 changed files with 8 additions and 1 deletions
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9
opkg-build
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@@ -297,9 +297,16 @@ mkdir $tmp_dir
build_date="${SOURCE_DATE_EPOCH:-$(date +%s)}"
mtime_args=""
# --clamp-mtime requires tar > 1.28. Only use it if SOURCE_DATE_EPOCH is set, to avoid having a generic case dependency on tar > 1.28.
# this setting will make sure files generated at build time have consistent mtimes, for reproducible builds.
if [ ! -z "$SOURCE_DATE_EPOCH" ]; then
mtime_args="--mtime=@$build_date --clamp-mtime"
fi
( cd $pkg_dir/$CONTROL && find . -type f > $tmp_dir/control_list )
( cd $pkg_dir && find . -path ./$CONTROL -prune -o -print > $tmp_dir/file_list )
( cd $pkg_dir && tar $ogargs $tsortargs --no-recursion -c $tarformat -T $tmp_dir/file_list | $compressor $compressorargs > $tmp_dir/data.tar.$cext )
( cd $pkg_dir && tar $ogargs $tsortargs --no-recursion $mtime_args -c $tarformat -T $tmp_dir/file_list | $compressor $compressorargs > $tmp_dir/data.tar.$cext )
( cd $pkg_dir/$CONTROL && tar $ogargs $tsortargs --no-recursion --mtime=@$build_date -c $tarformat -T $tmp_dir/control_list | gzip $zipargs > $tmp_dir/control.tar.gz )
rm $tmp_dir/file_list
rm $tmp_dir/control_list