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ecompress
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ecompress
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#!/bin/bash
# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
source "${PORTAGE_BIN_PATH}"/isolated-functions.sh || exit 1
if [[ -z $1 ]] ; then
__helpers_die "${0##*/}: at least one argument needed"
exit 1
fi
if ! ___eapi_has_prefix_variables; then
ED=${D} EPREFIX=
fi
while [[ $# -gt 0 ]] ; do
case $1 in
--ignore)
shift
skip_dirs=()
> "${T}/.ecompress_skip_files" || die
for skip; do
if [[ -d ${ED%/}/${skip#/} ]]; then
skip_dirs+=( "${ED%/}/${skip#/}" )
else
rm -f "${ED%/}/${skip#/}.ecompress" || die
printf -- '%s\n' "${EPREFIX}/${skip#/}" >> "${T}/.ecompress_skip_files" || die
fi
done
if [[ ${#skip_dirs[@]} -gt 0 ]]; then
while read -r -d '' skip; do
skip=${skip%.ecompress}
printf -- '%s\n' "${skip#${D%/}}" >> "${T}/.ecompress_skip_files" || die
done < <(find "${skip_dirs[@]}" -name '*.ecompress' -print0 -delete || die)
fi
if [[ -s ${T}/.ecompress_skip_files && -s ${T}/.ecompress_had_precompressed ]]; then
# Filter skipped files from ${T}/.ecompress_had_precompressed,
# using temporary files since these lists can be extremely large.
LC_COLLATE=C sort -u "${T}/.ecompress_skip_files" > "${T}/.ecompress_skip_files_sorted" || die
LC_COLLATE=C sort -u "${T}/.ecompress_had_precompressed" > "${T}/.ecompress_had_precompressed_sorted" || die
LC_COLLATE=C comm -13 "${T}/.ecompress_skip_files_sorted" "${T}/.ecompress_had_precompressed_sorted" > "${T}/.ecompress_had_precompressed" || die
rm -f "${T}/.ecompress_had_precompressed_sorted" "${T}/.ecompress_skip_files"{,_sorted}
fi
exit 0
;;
--queue)
shift
find_args=()
for path; do
if [[ -e ${ED%/}/${path#/} ]]; then
find_args+=( "${ED%/}/${path#/}" )
fi
done
if [[ ${#find_args[@]} -gt 0 ]]; then
find_args+=( -type f )
[[ -n ${PORTAGE_DOCOMPRESS_SIZE_LIMIT} ]] &&
find_args+=( -size "+${PORTAGE_DOCOMPRESS_SIZE_LIMIT}c" )
declare -A collisions
while IFS= read -d '' -r path; do
# detect the horrible posibility of the ebuild installing
# colliding compressed and/or uncompressed variants
# and fail hard (bug #667072)
#
# note: to save time, we need to do this only if there's
# at least one compressed file
case ${path} in
*.Z|*.gz|*.bz2|*.lzma|*.xz)
vpath=${path%.*}
for comp in '' .Z .gz .bz2 .lzma .xz; do
if [[ ${vpath}${comp} != ${path} && \
-e ${vpath}${comp} ]]; then
collisions[${path}]=1
collisions[${vpath}]=1
# ignore compressed variants in that case
continue 2
fi
done
printf -- '%s\n' "${path#${D%/}}" >> "${T}"/.ecompress_had_precompressed || die
;;
esac
>> "${path}.ecompress" || die
done < <(find "${find_args[@]}" -print0 || die)
if [[ ${#collisions[@]} -gt 0 ]]; then
eqawarn "QA Notice: Colliding files found by ecompress:"
eqawarn
for x in "${!collisions[@]}"; do
eqawarn " ${x}"
done
eqawarn
eqawarn "Please remove the extraneous compressed variants."
fi
fi
exit 0
;;
--dequeue)
[[ -n ${2} ]] && die "${0##*/}: --dequeue takes no additional arguments"
break
;;
*)
die "${0##*/}: unknown arguments '$*'"
exit 1
;;
esac
shift
done
# setup compression stuff
PORTAGE_COMPRESS=${PORTAGE_COMPRESS-bzip2}
if [[ -z ${PORTAGE_COMPRESS} ]]; then
find "${ED}" -name '*.ecompress' -delete
exit 0
fi
if [[ ${PORTAGE_COMPRESS_FLAGS+set} != "set" ]] ; then
case ${PORTAGE_COMPRESS} in
bzip2|gzip) PORTAGE_COMPRESS_FLAGS="-9";;
esac
fi
guess_suffix() {
set -e
tmpdir="${T}"/.ecompress$$.${RANDOM}
mkdir "${tmpdir}"
cd "${tmpdir}"
# we have to fill the file enough so that there is something
# to compress as some programs will refuse to do compression
# if it cannot actually compress the file
echo {0..1000} > compressme
${PORTAGE_COMPRESS} ${PORTAGE_COMPRESS_FLAGS} compressme > /dev/null
# If PORTAGE_COMPRESS_FLAGS contains -k then we need to avoid
# having our glob match the uncompressed file here.
suffix=$(echo compressme.*)
[[ -z $suffix || "$suffix" == "compressme.*" ]] && \
suffix=$(echo compressme*)
suffix=${suffix#compressme}
cd /
rm -rf "${tmpdir}"
echo "${suffix}"
}
# figure out the new suffix
export PORTAGE_COMPRESS_SUFFIX=$(guess_suffix) || die
fix_symlinks() {
# Repeat until nothing changes, in order to handle multiple
# levels of indirection (see bug #470916).
local -i indirection=0
while true ; do
local something_changed=
while read -r -d $'\0' brokenlink ; do
[[ -e ${brokenlink} ]] && continue
olddest=$(readlink "${brokenlink}")
newdest=${olddest}${PORTAGE_COMPRESS_SUFFIX}
if [[ "${newdest}" == /* ]] ; then
[[ -f "${D%/}${newdest}" ]] || continue
else
[[ -f "${brokenlink%/*}/${newdest}" ]] || continue
fi
something_changed=${brokenlink}
rm -f "${brokenlink}" &&
ln -snf "${newdest}" "${brokenlink}${PORTAGE_COMPRESS_SUFFIX}"
((ret|=$?))
done < <(find "${ED}" -type l -print0 || die)
[[ -n ${something_changed} ]] || break
(( indirection++ ))
if (( indirection >= 100 )) ; then
# Protect against possibility of a bug triggering an endless loop.
eerror "ecompress: too many levels of indirection for" \
"'${something_changed#${ED%/}}'"
break
fi
done
return ${ret}
}
export PORTAGE_COMPRESS PORTAGE_COMPRESS_FLAGS
find "${ED}" -name '*.ecompress' -delete -print0 |
___parallel_xargs -0 "${PORTAGE_BIN_PATH}"/ecompress-file
ret=${?}
if [[ -s ${T}/.ecompress_had_precompressed ]]; then
eqawarn "QA Notice: One or more compressed files were found in docompress-ed"
eqawarn "directories. Please fix the ebuild not to install compressed files"
eqawarn "(manpages, documentation) when automatic compression is used:"
eqawarn
n=0
while read -r f; do
eqawarn " ${f}"
if [[ $(( n++ )) -eq 10 ]]; then
eqawarn " ..."
break
fi
done <"${T}"/.ecompress_had_precompressed
fi
fix_symlinks
: $(( ret |= ${?} ))
[[ $ret -ne 0 ]] && __helpers_die "${0##*/} failed"
exit ${ret}