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#!/bin/bash
#
#  tor.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.
#
#  tor.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 tor, by Silvio Rhatto
# requires: libevent 
# tested: tor-0.2.0.30
#

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

# Set variables
CWD="$(pwd)"
SRC_NAME="tor"
PKG_NAME="tor"
ARCH=${ARCH:=i486}
SRC_VERSION=${VERSION:=0.2.0.30}
PKG_VERSION="$(echo "$SRC_VERSION" | tr '[[:blank:]-]' '_')"
BUILD=${BUILD:=1rha}
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=${CONF_OPTIONS:="--sysconfdir=/etc"}
NUMJOBS=${NUMJOBS:=""}

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

if [ "$ARCH" = "i386" ]; then
  SLKCFLAGS="-O2 -march=i386 -mcpu=i686"
elif [ "$ARCH" = "i486" ]; then
  SLKCFLAGS="-O2 -march=i486 -mcpu=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

# 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

# Dowload source if necessary
SRC="$SRC_NAME-$VERSION.tar.gz"
URL="http://www.torproject.org/dist/$SRC"

if [ ! -s "$SRC_DIR/$SRC" ] || ! gunzip -t "$SRC_DIR/$SRC" 2> /dev/null; then
  wget "$URL" -O "$SRC_DIR/$SRC" || exit $ERROR_WGET
fi

# Import minimized signing key from
if echo [[SIGNING KEY URL]] | grep -q -v "SIGNING KEY URL"; then
  lynx -dump [[SIGNING KEY URL]] | gpg --import || exit $ERROR_GPG
elif echo 0x28988BF5 0x165733EA | grep -q -v "SIGNING KEY ID"; then
  gpg --recv-keys 0x28988BF5 0x165733EA || exit $ERROR_GPG
else
  gpg --import << EOKEY || exit $ERROR_GPG
[[SIGNING KEY]]
EOKEY
fi

# Download source's signature if necessary and check it
if echo [[SIGNING URL]] | grep -q -v "SIGNING URL"; then
  SIGNATURE="`basename [[SIGNING URL]]`"
  if [ ! -s "$SRC_DIR/$SIGNATURE" ]; then
    wget "[[SIGNING URL]]" -O "$SRC_DIR/$SIGNATURE" || exit $ERROR_WGET
  fi
else
  if [ -s "$SRC_DIR/$SRC.sig" ]; then
    SIGNATURE="$SRC.sig"
  elif [ -s "$SRC_DIR/$SRC.asc" ]; then
    SIGNATURE="$SRC.asc"
  else
    echo Trying to get signature file from $URL.sig...
    if wget "$URL.sig" -O "$SRC_DIR/$SRC.sig"; then
      SIGNATURE="$SRC.sig"
    else
      rm $SRC_DIR/$SRC.sig
      echo Trying to get signature file from $URL.asc...
      if wget "$URL.asc" -O "$SRC_DIR/$SRC.asc"; then
        SIGNATURE="$SRC.asc"
      else
        rm $SRC_DIR/$SRC.asc
        echo "Error getting source's signature file"
        exit $ERROR_GPG
      fi
    fi
  fi
fi

echo Checking $SRC_DIR/$SRC with gpg using $SRC_DIR/$SIGNATURE...
gpg --verify "$SRC_DIR/$SIGNATURE" "$SRC_DIR/$SRC" || exit $ERROR_GPG
echo Success.

# Untar
cd "$PKG_WORK"
tar --no-same-owner --no-same-permissions -xvf "$SRC_DIR/$SRC" || exit $ERROR_TAR
PKG_SRC="$PWD/`ls -l | awk '/^d/ { print $NF }'`"
cd "$PKG_SRC"

# Patch source
patches="
         $PKG_NAME.diff $PKG_NAME-$PKG_VERSION.diff
         $PKG_NAME-$PKG_VERSION-$ARCH.diff $PKG_NAME-$ARCH.diff"
for patch in $patches; do
  if [ -f "$CWD/$patch" ]; then
    patch -Np1 < "$CWD/$patch" || exit $ERROR_PATCH
  elif [ -f "$CWD/patches/$patch" ]; then
    patch -Np1 < "$CWD/patches/$patch" || exit $ERROR_PATCH
  elif [ -f "$CWD/$patch.gz" ]; then
    gzip -dc "$CWD/$patch.gz" | patch -Np1 || exit $ERROR_PATCH
  elif [ -f "$CWD/patches/$patch.gz" ]; then
    gzip -dc "$CWD/patches/$patch.gz" | patch -Np1 || exit $ERROR_PATCH
  fi
done

if echo [[PATCH URLS]] | grep -q -v "PATCH URLS"; then
  for patch_url in [[PATCH URLS]]; do
    patch="`basename $patch_url`"
    if [ ! -s "$SRC_DIR/$patch" ]; then
      wget "$patch_url" -O "$SRC_DIR/$patch" || exit $ERROR_WGET
    fi
    if [ "`basename $patch .gz`" != "$patch" ]; then
      gzip -dc $SRC_DIR/$patch | patch -Np1 || exit $ERROR_PATCH
    elif [ "`basename $patch .bz2`" != "$patch" ]; then
      bzip2 -dc $SRC_DIR/$patch | patch -Np1 || exit $ERROR_PATCH
    else
      patch -Np1 < "$SRC_DIR/$patch" || exit $ERROR_PATCH
    fi
  done
fi

# Configure
CFLAGS="$SLKCFLAGS" \
  CXXFLAGS="$SLKCFLAGS" \
  ./configure \
  --prefix="$PREFIX" --libdir="$LIBDIR" $CONF_OPTIONS || exit $ERROR_CONF

# Compile
make $NUMJOBS || exit $ERROR_MAKE

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

# Strip binaries
( cd "$PKG"
  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | \
    xargs strip --strip-unneeded 2> /dev/null
  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | \
    xargs strip --strip-unneeded 2> /dev/null
)

# Copy init scripts
mkdir -p $PKG/etc/rc.d
cp $CWD/rc.* $PKG/etc/rc.d/

# Install documentation
DOCS="AUTHORS ChangeLog LICENSE README"
mkdir -p "$PKG/usr/doc/$PKG_NAME-$PKG_VERSION" || exit $ERROR_MKDIR
for doc in $DOCS; do
  if [ -f "$doc" ]; then
    cp -a $doc "$PKG/usr/doc/$PKG_NAME-$PKG_VERSION"
  fi
done

# Add package description (slack-desc)
mkdir -p "$PKG/install" || exit $ERROR_MKDIR
cat << EODESC > "$PKG/install/slack-desc"
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description. Line
# up the first '|' above the ':' following the base package name, and the '|'
# on the right side marks the last column you can put a character in. You must
# make exactly 11 lines for the formatting to be correct.  It's also
# customary to leave one space after the ':'.

   |-----handy-ruler----------------------------------------------------------|
tor: tor (An anonymous Internet communication system)
tor:
tor: Tor is a toolset for a wide range of organizations and people that
tor: want to improve their safety and security on the Internet. Using Tor
tor: can help you anonymize web browsing and publishing, instant
tor: messaging, IRC, SSH, and other applications that use the TCP
tor: protocol. Tor also provides a platform on which software developers
tor: can build new applications with built-in anonymity, safety, and
tor: privacy features.
tor:
tor:
EODESC

# Move config files to .new to avoid overwriting any system config
for config_file in etc/tor/tor-tsocks.conf; do
  mv $PKG/$config_file $PKG/$config_file.new
done

# Add a post-installation script (doinst.sh)
cat << EOSCRIPT > "$PKG/install/doinst.sh"
config() {
  NEW="\$1"
  OLD="\$(dirname \$NEW)/\$(basename \$NEW .new)"
  OLD="\$(dirname \$NEW)/\$(basename \$OLD .sample)"
  OLD="\$(dirname \$NEW)/\$(basename \$OLD .dist)"

  # If there's no config file by that name, mv it over:
  if [ ! -r \$OLD ]; then
    mv \$NEW \$OLD
  elif [ "\$(cat \$OLD | md5sum)" = "\$(cat \$NEW | md5sum)" ]; then
    # toss the redundant copy
    rm \$NEW
  fi
  # Otherwise, we leave the .new copy for the admin to consider...
}

mkgroup() {
  GROUP="\$1"
  if ! grep -qe "^\$GROUP:" etc/group; then
    echo Creating group \$GROUP...
    chroot . /usr/sbin/groupadd \$GROUP
  fi
}

mkuser() {
  USER="\$1"
  if [ ! -z "\$2" ]; then
    GROUP="\$2"
  else
    GROUP="\$USER"
  fi
  if ! grep -qe "^\$USER:" etc/passwd; then
    echo Creating user \$USER...
    chroot . /usr/sbin/useradd \$USER -g \$GROUP
  fi
}

config etc/rc.d/rc.tor.new ; config etc/tor/torrc.sample ; config etc/tor/tor-tsocks.conf.new
EOSCRIPT

# 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 [ "$CLEANUP" == "yes" ]; then
  rm -rf "$PKG_WORK" "$PKG"
fi