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#!/bin/bash
#
#  simplepkg.SlackBuild 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.
#
#  simplepkg.SlackBuild 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
#
# slackbuild for simplepkg, by Rudson R. Alves
# requires:  
# tested: simplepkg-svn_version
#

# Look for slackbuildrc
if [ -f ~/.slackbuildrc ]; then
  source ~/.slackbuildrc
elif [ -f /etc/slackbuildrc ]; then
  source /etc/slackbuildrc
fi

# Set variables
CWD="$(pwd)"
SRC_NAME="simplepkg"
PKG_NAME="simplepkg"
ARCH="noarch"
SRC_VERSION=${VERSION:=svn_version}
PKG_VERSION="$(echo "$SRC_VERSION" | tr '[[:blank:]-]' '_')"
BUILD=${BUILD:=1srv}
SRC_DIR=${SRC_DIR:=$CWD}/$PKG_NAME
TMP=${TMP:=/tmp}
PKG=${PKG:=$TMP/package-$PKG_NAME}
REPOS=${REPOS:=$TMP}
PREFIX=${PREFIX:=/usr}
PKG_WORK="$TMP/$SRC_NAME"
CONF_OPTIONS=${CONF_OPTIONS:=""}
NUMJOBS=${NUMJOBS:=""}

# Set system libraries' path and optmization flags based on $ARCH
LIBDIR="$PREFIX/lib"

if [ "$ARCH" = "i386" ]; then
  SLKCFLAGS="-O2 -march=i386 -mtune=i686"
elif [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686"
elif [ "$ARCH" = "s390" ]; then
  SLKCFLAGS="-O2"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIR="$PREFIX/lib64"
  LDFLAGS="-L/lib64 -L/usr/lib64"
fi

# Set error codes (used by createpkg)
ERROR_WGET=31;      ERROR_MAKE=32;      ERROR_INSTALL=33
ERROR_MD5=34;       ERROR_CONF=35;      ERROR_HELP=36
ERROR_TAR=37;       ERROR_MKPKG=38;     ERROR_GPG=39
ERROR_PATCH=40;     ERROR_VCS=41;       ERROR_MKDIR=42
ERROR_MANIFEST=43;

# Clean up any leftovers of previous builds
rm -rf "$PKG_WORK" 2> /dev/null
rm -rf "$PKG" 2> /dev/null

# Create directories if necessary
mkdir -p "$SRC_DIR" || exit $ERROR_MKDIR
mkdir -p "$PKG" || exit $ERROR_MKDIR
mkdir -p "$REPOS" || exit $ERROR_MKDIR
mkdir -p "$PKG_WORK" || exit $ERROR_MKDIR

# Get svn source code
cd "$SRC_DIR"
SND_DIR="`basename http://slack.sarava.org/simplepkg/trunk`"

if [ "`find "$SRC_DIR/" -name .svn`" != "" ] && [ -d "$SRC_DIR/$SND_DIR" ]; then
  cd $SND_DIR
  svn update || exit $ERROR_VCS
else
  svn checkout http://slack.sarava.org/simplepkg/trunk $SND_DIR || exit $ERROR_VCS
  cd $SND_DIR
fi

PKG_VERSION="`svn info | awk '/Last Changed Rev:/ { print $4 }'`_svn"

# Copy svn source
cd "$PKG_WORK"
cp -a $SRC_DIR/* .
PKG_SRC="$PWD/$SND_DIR"
cd "$PKG_SRC"

# Check Manifest file
if [ -e "$CWD/Manifest" ]; then

  # Manifest signature checking
  if grep -q -- "-----BEGIN PGP SIGNED MESSAGE-----" $CWD/Manifest; then
    echo "Checking Manifest signature..."
    gpg --verify $CWD/Manifest
    if [ "$?" != "0" ]; then
      exit $ERROR_MANIFEST
    fi
  fi

  MANIFEST_LINES="`grep -E -v "^(MKBUILD|SLACKBUILD)" $CWD/Manifest | wc -l`"

  for ((MANIFEST_COUNT=1; MANIFEST_COUNT <= $MANIFEST_LINES; MANIFEST_COUNT++)); do

    MANIFEST_LINE="`grep -E -v "^(MKBUILD|SLACKBUILD)" $CWD/Manifest | head -n $MANIFEST_COUNT | tail -n 1`"
    MANIFEST_FILE="`echo $MANIFEST_LINE | awk '{ print $2 }'`"
    MANIFEST_FILE_TYPE="`echo $MANIFEST_LINE | awk '{ print $1 }'`"

    if [ -e "$SRC_DIR/$MANIFEST_FILE" ]; then
      MANIFEST_FILE="$SRC_DIR/$MANIFEST_FILE"
    else
      MANIFEST_FILE="`find $CWD -name $MANIFEST_FILE`"
    fi

    if [ ! -e "$MANIFEST_FILE" ] || [ -d "$MANIFEST_FILE" ]; then
      continue
    fi

    echo "Checking Manifest for $MANIFEST_FILE_TYPE $MANIFEST_FILE integrity..."

    SIZE_SRC="`wc -c $MANIFEST_FILE | awk '{ print $1 }'`"
    SIZE_MANIFEST="`echo $MANIFEST_LINE | awk '{ print $3 }'`"

    # Check source code size
    if [ "$SIZE_SRC" != "$SIZE_MANIFEST" ]; then
      echo "SIZE Manifest: $SIZE_MANIFEST; SIZE $SRC: $SIZE_SRC"
      exit $ERROR_MANIFEST
    else
      echo "Size match."
    fi

    # Check source code integrity
    for ALGO in md5 rmd160 sha1 sha256 sha512; do
      if [ $ALGO = "rmd160" ]; then
        ALGO_SRC="`openssl rmd160 $MANIFEST_FILE | awk '{ print $2 }'`"
      else
        ALGO_SRC="`"$ALGO"sum $MANIFEST_FILE | awk '{ print $1 }'`"
      fi
      ALGO="`echo $ALGO | tr '[:lower:]' '[:upper:]'`"
      ALGO_MANIFEST=$(echo $MANIFEST_LINE | sed "s/.* $ALGO //" | awk '{ print $1 }')
      if [ "$ALGO_SRC" != "$ALGO_MANIFEST" ]; then
        echo "$ALGO Manifest: $ALGO_MANIFEST; $ALGO $SRC: $ALGO_SRC"
        exit $ERROR_MANIFEST
      else
        echo "$ALGO match."
      fi
    done

  done

else
  exit $ERROR_MANIFEST
fi

# Install
make install DESTDIR="$PKG" || exit $ERROR_INSTALL

# Build the package
cd "$PKG"
makepkg -l y -c n "$REPOS/$PKG_NAME-$PKG_VERSION-$ARCH-$BUILD.tgz" || exit $ERROR_MKPKG

# Delete source and build directories if requested
if [ "$CLEANUP" == "yes" ] || [ "$1" = "--cleanup" ]; then
  rm -rf "$PKG_WORK" "$PKG"
fi