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gentoo-overlay/eclass/unpacker.eclass

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# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/unpacker.eclass,v 1.5 2012/02/13 20:53:34 vapier Exp $
# @ECLASS: unpacker.eclass
# @MAINTAINER:
# base-system@gentoo.org
# @BLURB: helpers for extraneous file formats and consistent behavior across EAPIs
# @DESCRIPTION:
# Some extraneous file formats are not part of PMS, or are only in certain
# EAPIs. Rather than worrying about that, support the crazy cruft here
# and for all EAPI versions.
# Possible todos:
# - merge rpm unpacking
# - support partial unpacks?
if [[ ${___ECLASS_ONCE_UNPACKER} != "recur -_+^+_- spank" ]] ; then
___ECLASS_ONCE_UNPACKER="recur -_+^+_- spank"
# @ECLASS-VARIABLE: UNPACKER_BZ2
# @DEFAULT_UNSET
# @DESCRIPTION:
# Utility to use to decompress bzip2 files. Will dynamically pick between
# `pbzip2` and `bzip2`. Make sure your choice accepts the "-c" option.
# Note: this is meant for users to set, not ebuilds.
# for internal use only (unpack_pdv and unpack_makeself)
find_unpackable_file() {
local src=$1
if [[ -z ${src} ]] ; then
src=${DISTDIR}/${A}
else
if [[ ${src} == ./* ]] ; then
: # already what we want
elif [[ -e ${DISTDIR}/${src} ]] ; then
src=${DISTDIR}/${src}
elif [[ -e ${PWD}/${src} ]] ; then
src=${PWD}/${src}
elif [[ -e ${src} ]] ; then
src=${src}
fi
fi
[[ ! -e ${src} ]] && return 1
echo "${src}"
}
unpack_banner() {
echo ">>> Unpacking ${1##*/} to ${PWD}"
}
# @FUNCTION: unpack_pdv
# @USAGE: <file to unpack> <size of off_t>
# @DESCRIPTION:
# Unpack those pesky pdv generated files ...
# They're self-unpacking programs with the binary package stuffed in
# the middle of the archive. Valve seems to use it a lot ... too bad
# it seems to like to segfault a lot :(. So lets take it apart ourselves.
#
# You have to specify the off_t size ... I have no idea how to extract that
# information out of the binary executable myself. Basically you pass in
# the size of the off_t type (in bytes) on the machine that built the pdv
# archive.
#
# One way to determine this is by running the following commands:
#
# @CODE
# strings <pdv archive> | grep lseek
# strace -elseek <pdv archive>
# @CODE
#
# Basically look for the first lseek command (we do the strings/grep because
# sometimes the function call is _llseek or something) and steal the 2nd
# parameter. Here is an example:
#
# @CODE
# vapier@vapier 0 pdv_unpack # strings hldsupdatetool.bin | grep lseek
# lseek
# vapier@vapier 0 pdv_unpack # strace -elseek ./hldsupdatetool.bin
# lseek(3, -4, SEEK_END) = 2981250
# @CODE
#
# Thus we would pass in the value of '4' as the second parameter.
unpack_pdv() {
local src=$(find_unpackable_file "$1")
local sizeoff_t=$2
[[ -z ${src} ]] && die "Could not locate source for '$1'"
[[ -z ${sizeoff_t} ]] && die "No idea what off_t size was used for this pdv :("
unpack_banner "${src}"
local metaskip=$(tail -c ${sizeoff_t} "${src}" | hexdump -e \"%i\")
local tailskip=$(tail -c $((${sizeoff_t}*2)) "${src}" | head -c ${sizeoff_t} | hexdump -e \"%i\")
# grab metadata for debug reasons
local metafile="${T}/${FUNCNAME}.meta"
tail -c +$((${metaskip}+1)) "${src}" > "${metafile}"
# rip out the final file name from the metadata
local datafile=$(tail -c +$((${metaskip}+1)) "${src}" | strings | head -n 1)
datafile=$(basename "${datafile}")
# now lets uncompress/untar the file if need be
local tmpfile="${T}/${FUNCNAME}"
tail -c +$((${tailskip}+1)) ${src} 2>/dev/null | head -c 512 > "${tmpfile}"
local iscompressed=$(file -b "${tmpfile}")
if [[ ${iscompressed:0:8} == "compress" ]] ; then
iscompressed=1
mv "${tmpfile}"{,.Z}
gunzip "${tmpfile}"
else
iscompressed=0
fi
local istar=$(file -b "${tmpfile}")
if [[ ${istar:0:9} == "POSIX tar" ]] ; then
istar=1
else
istar=0
fi
#for some reason gzip dies with this ... dd cant provide buffer fast enough ?
#dd if=${src} ibs=${metaskip} count=1 \
# | dd ibs=${tailskip} skip=1 \
# | gzip -dc \
# > ${datafile}
if [ ${iscompressed} -eq 1 ] ; then
if [ ${istar} -eq 1 ] ; then
tail -c +$((${tailskip}+1)) "${src}" 2>/dev/null \
| head -c $((${metaskip}-${tailskip})) \
| tar -xzf -
else
tail -c +$((${tailskip}+1)) "${src}" 2>/dev/null \
| head -c $((${metaskip}-${tailskip})) \
| gzip -dc \
> ${datafile}
fi
else
if [ ${istar} -eq 1 ] ; then
tail -c +$((${tailskip}+1)) "${src}" 2>/dev/null \
| head -c $((${metaskip}-${tailskip})) \
| tar --no-same-owner -xf -
else
tail -c +$((${tailskip}+1)) "${src}" 2>/dev/null \
| head -c $((${metaskip}-${tailskip})) \
> ${datafile}
fi
fi
true
#[ -s "${datafile}" ] || die "failure unpacking pdv ('${metaskip}' '${tailskip}' '${datafile}')"
#assert "failure unpacking pdv ('${metaskip}' '${tailskip}' '${datafile}')"
}
# @FUNCTION: unpack_makeself
# @USAGE: [file to unpack] [offset] [tail|dd]
# @DESCRIPTION:
# Unpack those pesky makeself generated files ...
# They're shell scripts with the binary package tagged onto
# the end of the archive. Loki utilized the format as does
# many other game companies.
#
# If the file is not specified, then ${A} is used. If the
# offset is not specified then we will attempt to extract
# the proper offset from the script itself.
unpack_makeself() {
local src_input=${1:-${A}}
local src=$(find_unpackable_file "${src_input}")
local skip=$2
local exe=$3
[[ -z ${src} ]] && die "Could not locate source for '${src_input}'"
unpack_banner "${src}"
if [[ -z ${skip} ]] ; then
local ver=$(grep -m1 -a '#.*Makeself' "${src}" | awk '{print $NF}')
local skip=0
exe=tail
case ${ver} in
1.5.*|1.6.0-nv) # tested 1.5.{3,4,5} ... guessing 1.5.x series is same
skip=$(grep -a ^skip= "${src}" | cut -d= -f2)
;;
2.0|2.0.1)
skip=$(grep -a ^$'\t'tail "${src}" | awk '{print $2}' | cut -b2-)
;;
2.1.1)
skip=$(grep -a ^offset= "${src}" | awk '{print $2}' | cut -b2-)
(( skip++ ))
;;
2.1.2)
skip=$(grep -a ^offset= "${src}" | awk '{print $3}' | head -n 1)
(( skip++ ))
;;
2.1.3)
skip=`grep -a ^offset= "${src}" | awk '{print $3}'`
(( skip++ ))
;;
2.1.4|2.1.5|2.1.6)
skip=$(grep -a offset=.*head.*wc "${src}" | awk '{print $3}' | head -n 1)
skip=$(head -n ${skip} "${src}" | wc -c)
exe="dd"
;;
*)
eerror "I'm sorry, but I was unable to support the Makeself file."
eerror "The version I detected was '${ver}'."
eerror "Please file a bug about the file ${src##*/} at"
eerror "http://bugs.gentoo.org/ so that support can be added."
die "makeself version '${ver}' not supported"
;;
esac
debug-print "Detected Makeself version ${ver} ... using ${skip} as offset"
fi
case ${exe} in
tail) exe="tail -n +${skip} '${src}'";;
dd) exe="dd ibs=${skip} skip=1 if='${src}'";;
*) die "makeself cant handle exe '${exe}'"
esac
# lets grab the first few bytes of the file to figure out what kind of archive it is
local filetype tmpfile="${T}/${FUNCNAME}"
eval ${exe} 2>/dev/null | head -c 512 > "${tmpfile}"
filetype=$(file -b "${tmpfile}") || die
case ${filetype} in
*tar\ archive*)
eval ${exe} | tar --no-same-owner -xf -
;;
bzip2*)
eval ${exe} | bzip2 -dc | tar --no-same-owner -xf -
;;
gzip*)
eval ${exe} | tar --no-same-owner -xzf -
;;
compress*)
eval ${exe} | gunzip | tar --no-same-owner -xf -
;;
*)
eerror "Unknown filetype \"${filetype}\" ?"
false
;;
esac
assert "failure unpacking (${filetype}) makeself ${src##*/} ('${ver}' +${skip})"
}
# @FUNCTION: unpack_deb
# @USAGE: <one deb to unpack>
# @DESCRIPTION:
# Unpack a Debian .deb archive in style.
unpack_deb() {
[[ $# -eq 1 ]] || die "Usage: ${FUNCNAME} <file>"
local deb=$(find_unpackable_file "$1")
unpack_banner "${deb}"
ar x "${deb}"
unpack ./data.tar*
}
# @FUNCTION: _unpacker
# @USAGE: <one archive to unpack>
# @INTERNAL
# @DESCRIPTION:
# Unpack the specified archive. We only operate on one archive here
# to keep down on the looping logic (that is handled by `unpacker`).
_unpacker() {
[[ $# -eq 1 ]] || die "Usage: ${FUNCNAME} <file>"
local a=$1
local m=$(echo "${a}" | tr '[:upper:]' '[:lower:]')
a=$(find_unpackable_file "${a}")
# first figure out the decompression method
case ${m} in
*.bz2|*.tbz|*.tbz2)
local bzcmd=${PORTAGE_BZIP2_COMMAND:-$(type -P pbzip2 || bzip2)}
local bzuncmd=${PORTAGE_BUNZIP2_COMMAND:-${PORTAGE_BZIP2_COMMAND} -d}
: ${UNPACKER_BZ2:=${bzuncmd}}
comp="${UNPACKER_BZ2} -c"
;;
*.z|*.gz|*.tgz)
comp="gzip -dc" ;;
*.lzma|*.xz|*.txz)
comp="xz -dc" ;;
*) comp="" ;;
esac
# then figure out if there are any archiving aspects
arch=""
case ${m} in
*.tgz|*.tbz|*.tbz2|*.txz|*.tar.*|*.tar)
arch="tar --no-same-owner -xof" ;;
*.deb)
arch="unpack_deb" ;;
*.run)
arch="unpack_makeself" ;;
*.bin)
# Makeself archives can be annoyingly named
if head -c 100 "${a}" | grep -qs '#.*Makeself' ; then
arch="unpack_makeself"
fi
;;
esac
# finally do the unpack
if [[ -z ${arch}${comp} ]] ; then
unpack "$1"
return $?
fi
[[ ${arch} != unpack_* ]] && unpack_banner "${a}"
if [[ -z ${arch} ]] ; then
${comp} "${a}" > "${a%.*}"
elif [[ -z ${comp} ]] ; then
${arch} "${a}"
else
${comp} "${a}" | ${arch} -
fi
assert "unpacking ${a} failed (comp=${comp} arch=${arch})"
}
# @FUNCTION: unpacker
# @USAGE: [archives to unpack]
# @DESCRIPTION:
# This works in the same way that `unpack` does. If you don't specify
# any files, it will default to ${A}.
unpacker() {
local a
[[ $# -eq 0 ]] && set -- ${A}
for a ; do _unpacker "${a}" ; done
}
# @FUNCTION: unpacker_src_unpack
# @DESCRIPTION:
# Run `unpacker` to unpack all our stuff.
unpacker_src_unpack() {
unpacker
}
# @FUNCTION: unpacker_src_uri_depends
# @USAGE: [archives that we will unpack]
# @RETURN: Dependencies needed to unpack all the archives
# @DESCRIPTION:
# Walk all the specified files (defaults to $SRC_URI) and figure out the
# dependencies that are needed to unpack things.
#
# Note: USE flags are not yet handled.
unpacker_src_uri_depends() {
local uri deps d
[[ $# -eq 0 ]] && set -- ${SRC_URI}
for uri in "$@" ; do
case ${uri} in
*.rar|*.RAR)
d="app-arch/unrar" ;;
*.7z)
d="app-arch/p7zip" ;;
*.xz)
d="app-arch/xz-utils" ;;
esac
deps+=" ${d}"
done
echo "${deps}"
}
EXPORT_FUNCTIONS src_unpack
fi