#!/bin/bash
# pck-extract -- plugin for @package@
# Copyright (C) 2004-2010 Davide Madrisan <davide.madrisan@gmail.com>

[ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 3 ] &&
 { echo $"this script requires bash version 3 or better" >&2 && exit 1; }

me=(${0##*/} "@version@" "@date@")

[ -r @libdir@/libmsgmng.lib ] ||
 { echo "$me: "$"library not found"": @libdir@/libmsgmng.lib" 1>&2
   exit 1; }
. @libdir@/libmsgmng.lib

# default values:
# - colorized output (disabled by default)
let "colorize = 0"
# - output verbosity
let "verbose = 1"

# load the configuration file(s)
[ -r @libdir@/libcfg.lib ] ||
 { echo "$me: "$"library not found"": @libdir@/libcfg.lib" 1>&2
   exit 1; }
. @libdir@/libcfg.lib

[ -r @libdir@/libnetwork.lib ] ||
 { echo "$me: "$"library not found"": @libdir@/libnetwork.lib" 1>&2
   exit 1; }
. @libdir@/libnetwork.lib

if [[ -z "$LANG" && -r /etc/sysconfig/i18n ]]; then
   . /etc/sysconfig/i18n
   [ "$LANG" ] && export LANG
fi
TEXTDOMAIN="${me[0]}"; export TEXTDOMAIN

function copying() {
   echo "\
"$"This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License version 2 as published by the
Free Software Foundation.  There is NO warranty; not even for MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE."
}

function version() {
   echo "\
${me[0]} ${me[1]}
Copyright (C) 2004-2010 Davide Madrisan <davide.madrisan@gmail.com>"
}

# $1: optional exit code (default is '1')
function usage() {
   version
   echo "\
"$"Extract a given file or list of files from a srpm archive"".

"$"Usage"":
 @frontend@ -x -F <file(s)> [--destdir=<dir>] <srpm_pck>

"$"where the above options mean"":
 -x, --extract      "$"Extract from the srpm package <srpm_pck>...""
 -F, --files        "$"...the specified file or list of files <file(s)>""
     --destdir      "$"Save extracted files in the directory <dir>""

"$"Operation modes"":
 -h, --help         "$"Print this help, then exit""
 -V, --version      "$"Print version number, then exit""
 -q, --quiet        "$"Run in quiet mode""
 -r, --colorize     "$"Enable the colorized output""
 --colorize-theme   "$"Select the theme to be used for the colorized output""
 -D, --debug        "$"Run in debugging mode (very verbose output)""

"$"Samples"":
 @frontend@ -x @package@-@version@-1mamba.src.rpm -F \\*.spec --destdir=/tmp/specs

"$"Report bugs to <davide.madrisan@gmail.com>."

   exit ${1:-1}
}

case $1 in
   --autospec-args-file*)
      if [[ "$1" =~ = ]]; then
         argsfile=`echo $1 | sed 's/^--autospec-args-file=//'`
      else
         argsfile=$2
      fi
      [ -r "$argsfile" ] || notify.error $"cannot read"": \`$argsfile'"
      . $argsfile && rm -f $argsfile
   ;;
esac

for arg in $@; do
   case $arg in
   -h|--help) usage 0 ;;
   -V|--version) version; echo; copying; exit 0 ;;
   esac
done

exec_options=`LC_ALL=C getopt \
   -o xF:DqrhV \
   --long \
extract,files:,destdir:,\
debug,quiet,colorize,colorize-theme:,help,version,\
frontend_opts: \
   -n "$me" -- "$@"`
[ $? = 0 ] || exit 1

notify.debug "[ ${0} ${exec_options} ]\n"
eval set -- "$exec_options"

while :; do
   case $1 in
      -x|--extract) ;;
      -F|--files)
         filelst="$2"; shift ;;
      --destdir)
         destdir="$2"; shift ;;
      -D|--debug)
         let "verbose = 2" ;;
      -q|--quiet)
         let "verbose = 0" ;;
      -r|--colorize)
         let "colorize = 1" ;;
      --colorize-theme)
         colorize_theme="$2"; shift ;;
      -h|--help)
         usage 0 ;;
      -V|--version)
         version; echo; copying; exit 0 ;;
      --) shift; break ;;
      *) notify.error $"unrecognized option"" -- \`$1'" ;;
   esac
   shift
done

for arg in $@; do
   [[ -z "$s_rpm_pck" ]] && s_rpm_pck=$arg ||
      notify.error $"unrecognized option"" -- \`$arg'"
done

[ "$colorize" = "1" ] && notify.enable_colors "$colorize_theme" \
   || notify.disable_colors

# s_rpm_pck : the name of the srpm package (local or remote)
#             (i.e. /usr/src/RPM/SRPMS/automake-1.9-1qilnx.src.rpm)
# filelst   : list of file to extract (default is '*.spec', that is the specfile)
# destdir   : the directory where to extract files (current directory if unset)
#
# Extract the specified file(s) `filelst' (default = all files) from the rpm or srpm
# archive `s_rpm_pck' to the optional directory `destdir'.

[ -z "$filelst" ] && filelst='*'
[ -z "$destdir" ] && destdir='.'

notify.note "[${NOTE}$s_rpm_pck${NORM}]"

# check if all the needed tools are available
for tool in bunzip2 cpio gunzip mktemp rpm2cpio; do
   [ "$(type -p $tool)" ] ||
      notify.error $"utility not found"": \`$tool'"
done

tmpcpiodir=$(mktemp -q -d -t $me.XXXXXXXX)
[ $? -eq 0 ] &&
   trap "rm -fr $tmpcpiodir" 0 1 2 3 6 7 9 13 15 ||
   notify.error $"can't create temporary files"
notify.debug "$FUNCNAME: tmpcpiodir = $tmpcpiodir"

#local s_rpm_pck_name
case "$s_rpm_pck" in
http://*\.src\.*|http://*\.nosrc\.*|ftp://*\.src\.*|ftp://*\.nosrc\.*)
   s_rpm_pck_name="${s_rpm_pck##*/}"
   notify.debug "$FUNCNAME: s_rpm_pck_name = $s_rpm_pck_name"

   curl.download \
--options "$curl_options" \
${proxy:+--proxy $proxy} ${proxy_user:+--proxy-user $proxy_user} \
--exit-on-err --destdir="$tmpcpiodir" "$s_rpm_pck"

   s_rpm_pck="$tmpcpiodir/$s_rpm_pck_name"
;;
*\.src\.*|*\.nosrc\.*)
   s_rpm_pck_name="$s_rpm_pck"
   notify.debug "$FUNCNAME: s_rpm_pck_name = $s_rpm_pck_name"

   [[ -e "$s_rpm_pck" ]] ||
      notify.error $"cannot find:"" \`$s_rpm_pck'"
;;
*) # FIXME : add support for RPMS packages if someone will ask for
   notify.error "\`$s_rpm_pck': "$"not a srpm package" ;;
esac

mkdir -p $destdir 2>/dev/null || notify.error $"cannot create \`$destdir'"

#local errcode
#local \
tmpcpiopck="srpm_pck.cpio"

notify.debug "\
$FUNCNAME: converting the rpm package into a cpio archive..."

rpm2cpio $s_rpm_pck > $tmpcpiodir/$tmpcpiopck
let "errcode = $?"
[ "$errcode" = 0 ] ||
 { rm -fr $tmpcpiodir
   notify.debug "$FUNCNAME: exit code of rpm2cpio = \`$errcode'"
   notify.error $"can't save extracted files to \`$destdir'"; }

notify.debug "\
$FUNCNAME: extracting files from the cpio archive..."

pushd $tmpcpiodir &>/dev/null

cpio --quiet --extract --preserve-modification-time \
   < $tmpcpiodir/$tmpcpiopck
let "errcode = $?"
[ "$errcode" = 0 ] ||
 { rm -fr $tmpcpiodir
   notify.debug "$FUNCNAME: exit code of cpio = \`$errcode'"
   notify.error $"can't save extracted files to \`$destdir'"; }

rm -f $tmpcpiodir/$tmpcpiopck

#notify.debug "\
#$FUNCNAME: extracting files from the srpm archive..."
#
#rpm2cpio $s_rpm_pck 2>/dev/null | \
#cpio --quiet --extract $filelst &>/dev/null
#[ $? -ne 0 ] &&
# { popd &>/dev/null
#   notify.error $"can't save extracted files to \`$destdir'"; }

popd &>/dev/null

#local fname
for f in $tmpcpiodir/${filelst:-*}; do
   fname=${f##*/}
   notify.debug "$FUNCNAME: fname = \"$fname\""
   case $fname in
      $s_rpm_pck_name)
      ;;
      *\.diff.bz2|*\.patch.bz2)
         notify.debug "$FUNCNAME: decompressing the patch..."
         bunzip2 $f &>/dev/null
         [ $? -eq 0 ] ||
          { rm -fr $tmpcpiodir
            notify.warning $"can't decompress the file"" \`$f'"; }

         notify.note " * ${NOTE}$destdir/${fname/\.bz2/}${NORM}"
         cp -pf ${f/\.bz2/} $destdir/${fname/\.bz2/} &>/dev/null
      ;;
      *\.diff.gz|*\.patch.gz)
         notify.debug "$FUNCNAME: decompressing the patch..."
         gunzip $f &>/dev/null
         [ $? -eq 0 ] ||
          { rm -fr $tmpcpiodir
            notify.warning $"can't decompress the file"" \`$f'"; }

         notify.note " * ${NOTE}$destdir/${fname/\.gz/}${NORM}"
         cp -pf ${f/\.gz/} $destdir/${fname/\.gz/} &>/dev/null
      ;;
      *)
         notify.note " * ${NOTE}$destdir/$fname${NORM}"
         cp -pf $f $destdir/$fname &>/dev/null
      ;;
   esac
   [ $? -eq 0 ] ||
    { rm -fr $tmpcpiodir
      notify.error $"can't save files to \`$destdir'"; }
done

rm -fr $tmpcpiodir