/
drt-blendbrute
executable file
·69 lines (57 loc) · 1.2 KB
/
drt-blendbrute
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#! /bin/sh
### Legal
#
# Author: Thomas Debesse <dev@illwieckz.net>
# License: ISC
#
if [ "${1}" = '-q' ]
then
exec 1>/dev/null
exec 2>/dev/null
shift
fi
file_name="${1}"
_testfmt () {
file -b "${1}" | grep -q "${2}"
}
[ -z "${file_name}" ] && exit
[ ! -f "${file_name}" ] && exit
if [ -z "${TMPDIR}" ]
then
TMPDIR='/tmp'
fi
temp_dir="$(mktemp -d "${TMPDIR}/drt-gzblend-XXXXXXXX")"
_recompress () {
echo "recompress: ${1}"
temp_file="$(mktemp "${temp_dir}/file-XXXXXXXX.blend.gz")"
cat "${1}" | gzip -d | gzip -9 > "${temp_file}"
file_size="$(du -b "${1}" | cut -f 1)"
temp_size="$(du -b "${temp_file}" | cut -f 1)"
if [ "${temp_size}" -lt "${file_size}" ]
then
touch -r "${1}" "${temp_file}"
mv "${temp_file}" "${1}"
else
echo "keep: ${1}"
rm "${temp_file}"
fi
}
_compress () {
echo "compress: ${1}"
temp_file="$(mktemp "${temp_dir}/file-XXXXXXXX.blend.gz")"
cat "${1}" | gzip -9 > "${temp_file}"
touch -r "${1}" "${temp_file}"
mv "${temp_file}" "${1}"
}
if _testfmt "${file_name}" 'gzip compressed data'
then
_recompress "${file_name}"
elif _testfmt "${file_name}" 'Blender3D'
then
_compress "${file_name}"
else
echo "not a blender file: ${file_name}"
exit
fi
rmdir "${temp_dir}"
#EOF