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#!/bin/sh
set -o errexit
set -o nounset
if [ " $# " != '1' ]
then
cat 1>& 2 <<EOF
Usage: $0 VERSION
Downloads the requested version and creates a filtered source tarball.
EOF
exit 1
fi
VERSION = " ${ 1 } "
OUTDIR = " ${ PWD } "
TMPDIR = " $( mktemp -d) "
trap " rm -rf ' ${ TMPDIR } ' " INT TERM EXIT
cd " ${ TMPDIR } "
REPO = "https://github.com/shssoichiro/oxipng"
URL = " ${ REPO } /archive/v ${ VERSION } /oxipng- ${ VERSION } .tar.gz "
echo " --> Downloading: ${ URL } " 1>& 2
curl -L -O " ${ URL } "
ARCHIVE = " $( find . -mindepth 1 -maxdepth 1 -type f -name '*.tar.gz' -print -quit) "
echo " --> Extracting: $( basename " ${ ARCHIVE } " ) " 1>& 2
tar -xzf " ${ ARCHIVE } "
echo '--> Removing tests/files/ due to licensing issues' 1>& 2
TARDIR = " $( basename " ${ ARCHIVE } " '.tar.gz' ) "
MTIME = " $( stat -c '%Y' " ${ TARDIR } " ) "
rm -rv " ${ TARDIR } /tests/files/ "
# Make sure the original mtime is preserved even if we modified the base
# directory by removing something at the top level. (So far, we didn’ t.)
touch -d @" ${ MTIME } " " ${ TARDIR } "
FILTERED = " $( basename " ${ ARCHIVE } " .tar.gz) -filtered.tar.gz "
echo " --> Re-archiving: ${ FILTERED } " 1>& 2
# https://www.gnu.org/software/tar/manual/html_section/Reproducibility.html
TZ = UTC LC_ALL = C tar \
--create \
--sort= name \
--format= posix \
--numeric-owner --owner= 0 --group= 0 \
--mode= go+u,go-w \
--pax-option= 'delete=atime,delete=ctime' \
" ${ TARDIR } / " |
gzip -9 > " ${ FILTERED } "
mv -v " ${ FILTERED } " " ${ OUTDIR } "
echo 'Done.' 1>& 2