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#!/bin/bash
#
# createpkg: package builder using http://slack.sarava.org/slackbuilds scripts
# feedback: rhatto at riseup.net | gpl
#
#  createpkg is free software; you can redistribute it and/or modify it under the
#  terms of the GNU General Public License as published by the Free Software
#  Foundation; either version 2 of the License, or any later version.
#
#  createpkg is distributed in the hope that it will be useful, but WITHOUT ANY
#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
#  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License along with
#  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
#  Place - Suite 330, Boston, MA 02111-1307, USA
#
# /etc/simplepkg/slackbuildrc parameters:
#
# SLACKBUILDS="/folder/to/place/slackbuilds", defaults to /var/slackbuilds
# SVN="svn://repository", defaults do svn://slack.sarava.org/slackbuilds
# SYNC="yes|no", whether to always update the repository
#

COMMON="/usr/libexec/simplepkg/common.sh"
SLACKBUILDRC="/etc/slackbuildrc"

if [ -f "$COMMON" ]; then
  source $COMMON
else
  echo "error: file $COMMON found, check your `basename $0` installation"
  exit 1
fi

function safe_exit {

  # exit codes
  case $1 in
    2) echo Could not create folder $2;;
    3) echo Could not update the repository $2 ;;
    4) usage ;;
    5) echo Script not found;;
    *) exit 1
  esac

  exit $1

}

function build_repo {

  BASEDIR="`dirname $SLACKBUILDS`"
  mkdir -p $BASEDIR || safe_exit 2 $BASEDIR
  cd $BASEDIR
  svn checkout $SVN
  cd $SLACKBUILDS

}

function usage {

  echo "usage: createpkg [--install] package-name"
  echo "       createpkg --no-deps package-name"
  echo "       createpkg --search package-name"
  echo "       createpkg --sync"

}

function check_config {

  if [ -f "$SLACKBUILDRC" ]; then
    source $SLACKBUILDRC
  fi

  TMP=${TMP:=/tmp}
  REPOS=${REPOS:=$TMP}
  SLACKBUILDS=${SLACKBUILDS:=/var/slackbuilds}
  SVN=${SVN:=svn://slack.sarava.org/slackbuilds}
  SYNC=${SYNC:=no}
  BASEDIR="`dirname $SLACKBUILDS`"

}

function solve_dep {

  # TODO: solve dep with version checking

  pack="$1"
  cond="$2"
  ver="$3"

  if [ "$cond" != "equal" ] && [ "$cond" != "less" ] && [ "$cond" != "equalorgreater" ] && [ "$cond" != "lessequal" ] && [ ! -z "$cond" ]; then
    # TODO: error
    false
  fi

  for candidate in `ls /var/log/packages/$pack* 2> /dev/null`; do
    candidate="`package_name $candidate`"
    if [ "$pack" == "$candidate" ]; then
      found="1"
      break
    fi
  done

  if [ "$found" != "1" ]; then
    createpkg --install $pack
  else
    found="0"
  fi

  # TODO: check if the package was built and installed

}

function check_repo {

  if [ ! -d "$SLACKBUILDS" ]; then
    build_repo
  fi

}

function sync_repo {

  cd $SLACKBUILDS
  svn update || build_repo

}

function find_script {

  find $SLACKBUILDS | grep -v .svn | grep -e "/$1.SlackBuild$"

}

check_config
check_repo

if [ -z "$1" ]; then
  safe_exit 4
elif [ "$#" == "2" ]; then
  if [ "$1" == "--search" ]; then
    find_script $2
    exit
  elif [ "$1" == "--install" ]; then
    PACKAGE="$2"
    INSTALL="1"
  elif [ "$1" == "--no-deps" ]; then
    NO_DEPS="1"
    PACKAGE="$2"
  else
    safe_exit 4
  fi
elif [ "$1" == "--sync" ]; then
  sync_repo 
  exit
elif [ "${1:0:1}" != "-" ]; then
  PACKAGE="$1"
else
  safe_exit 4
fi

if [ "$SYNC" == "yes" ]; then
  sync_repo
fi

BUILD_SCRIPT="`find_script $PACKAGE`"

if [ -z "$BUILD_SCRIPT" ]; then
  safe_exit 5
fi

SCRIPT_BASE="`dirname $BUILD_SCRIPT`"

if [ -f "$SCRIPT_BASE/$PACKAGE.slack-required" ]; then
  SLACK_REQ="$SCRIPT_BASE/$PACKAGE.slack-required"
elif [ -f "$SCRIPT_BASE/slack-required" ]; then
  SLACK_REQ="$SCRIPT_BASE/slack-required"
fi

if [ ! -z "$SLACK_REQ" ] && [ "$NO_DEPS" != "1" ]; then

  cat $SLACK_REQ | while read dep; do
    if [ ! -z "$dep" ]; then
      program="`echo $dep | awk '{ print $1 }'`"
      condition="`echo $dep | awk '{ print $2 }' | sed -e 's/>=/equalorgreater/' -e 's/=</equalorless/' -e 's/</less/' -e 's/>/greater/' -e 's/=/equal/'`"
      version="`echo $dep | awk '{ print $3 }' | tr -dc '[:digit:]'`"
      solve_dep $program $condition $version
    fi
  done

fi

cd $SCRIPT_BASE
INTERACT=no ./`basename $BUILD_SCRIPT`

# TODO: check slackbuild exit status code

VERSION="`grep -e '^VERSION=' $BUILD_SCRIPT | head -n 1 | sed -e "s/VERSION//g" -e 's/=//g' -e 's/-//g' | cut -d ":" -f 2 | cut -d "}" -f 1`"
BUILD="`grep -e '^BUILD=' $BUILD_SCRIPT | head -n 1 | sed -e "s/BUILD//g" -e 's/=//g' | cut -d ":" -f 2 | cut -d "}" -f 1`"
_ARCH="`grep -e '^ARCH' $BUILD_SCRIPT | head -n 1 | cut -d "=" -f 2 | sed -e 's/"//g'`"

if [ "$_ARCH" == "noarch" ]; then
  ARCH="noarch"
fi

if [ "$INSTALL" == "1" ]; then
  # installpkg $REPOS/$PACKAGE-$VERSION-$ARCH-$BUILD.tgz
  upgradepkg --install-new $REPOS/$PACKAGE-$VERSION-$ARCH-$BUILD.tgz
fi