#!/bin/bash
#
#    Copyright (C) 2008-2010  Rubén Rodríguez <ruben@trisquel.info>
#
#    This program 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
#    (at your option) any later version.
#
#    This program 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
#

set -e

PACKAGE=$(echo $0 |/bin/sed s/make-//g)
export DATA=$PWD/DATA/$PACKAGE
if ! [ 1$COMPONENT = "1main" ]
then
    COMPONENT=${COMPONENT:-universe}
    /bin/sed 's/^enable.*/enable: false/g' -i /etc/pkgbinarymangler/*.conf
fi

if [ -f /CurrentlyBuilding ]
then
    echo "Already running $(cat /CurrentlyBuilding)"
    echo "If $(cat /CurrentlyBuilding) broke and nothing is actually running"
    echo "remove /CurrentlyBuilding and run this script again"
    exit 1
else
    echo "Package: $PACKAGE
Component: $COMPONENT" > /CurrentlyBuilding
fi

[ -d PACKAGES ] || mkdir PACKAGES
[ -d /proc/sys ] || mount proc /proc -t proc
hostname devel.trisquel.info

export DEBIAN_FRONTEND=noninteractive
export DEBEMAIL=trisquel-devel@listas.trisquel.info
export DEBFULLNAME="Trisquel GNU/Linux developers"
export CODENAME=toutatis
export REVISION=6.0
export RELEASE=trisquel
export DOMAIN=trisquel.info
export UPSTREAM=precise
export UPSTREAMRELEASE=12.04
MIRROR=http://archive.ubuntu.com/ubuntu
DEVELMIRROR=http://devel.trisquel.info/trisquel/$CODENAME
LOCALMIRROR=http://archive.trisquel.info/trisquel

cat << EOF > /etc/lsb-release 
DISTRIB_ID=Trisquel
DISTRIB_RELEASE=$REVISION
DISTRIB_CODENAME=$CODENAME
DISTRIB_DESCRIPTION="Trisquel $REVISION"
EOF

replace(){
find $3 -type f -not -iregex '.*changelog.*' -not -iregex '.*copyright.*' -execdir /bin/sed --follow-symlinks -i s^"$1"^"$2"^g {} \;
}
changelog(){
echo | dch -D $CODENAME -v $(/bin/sed -n '1s/^.*(\(.*\)).*/\1'+${REVISION}trisquel${VERSION}'/p' debian/changelog)  "$1"

# Make sure the changelog file is identical between archs
/bin/sed "/-- Trisquel/s/.*/ -- Trisquel GNU\/Linux developers <trisquel-devel@listas.trisquel.info>  $DATE/" -i debian/changelog
}

rm -rf PACKAGES/$PACKAGE
mkdir PACKAGES/$PACKAGE
cd PACKAGES/$PACKAGE

cat << EOF > /etc/apt/sources.list
deb $MIRROR $UPSTREAM main universe
deb $MIRROR $UPSTREAM-updates main universe
deb $MIRROR $UPSTREAM-security main universe
deb-src $MIRROR $UPSTREAM main universe
deb-src $MIRROR $UPSTREAM-updates main universe
deb-src $MIRROR $UPSTREAM-security main universe

deb $LOCALMIRROR $CODENAME main
deb $LOCALMIRROR $CODENAME-updates main
deb $LOCALMIRROR $CODENAME-security main

deb $DEVELMIRROR $CODENAME main
deb-src $DEVELMIRROR $CODENAME main
EOF

[ "1$EXTERNAL" != "1" ] && eval echo "$EXTERNAL" >> /etc/apt/sources.list

apt-get update
apt-get install --force-yes -y devscripts

if [ $PACKAGE = linux ]
then
    apt-get --force-yes -y build-dep linux-libc-dev
    apt-get source linux-libc-dev --download-only
    dpkg-source -x --skip-patches *.dsc source
else
    [ 1$LOCALDEPENDS = 1true ] || apt-get --force-yes -y build-dep $PACKAGE
    apt-get source $PACKAGE --download-only
    dpkg-source -x --skip-patches *.dsc source
fi

find -maxdepth 1 -type f | xargs rm
cd source

#disable 3.0 deb source format
[ -f debian/source/format ] && rm debian/source/format
[ -f debian/source/options ] && rm debian/source/options

for i in debian.master/control.stub.in debian.master/control.stub debian.master/control debian/control.stub.in debian/control.stub debian/control
do
    [ -f $i ] && /bin/sed "s_^Maintainer.*_Maintainer: $DEBFULLNAME <$DEBEMAIL>_g" -i $i
done

compile(){
if [ 1$LOCALDEPENDS = 1true ]
then
    DEPENDS=$(/bin/sed -n '/Build-Dep/,/^[a-zA-W0-9]/ p' debian/control | head -n -1 | /bin/sed 's/.*://; s/(.*)//; s/,//g' |xargs echo -n)
    echo Installing Build-Depends: $DEPENDS
    apt-get --force-yes -y install $DEPENDS
fi

PROCESSORS=1
if [ 1$PARALLEL != "1false" ]
then
    PROCESSORS=$(grep processor /proc/cpuinfo | wc -l)
fi

if [ 1$QUILT != 1skip ]; then
export QUILT_PATCHES=debian/patches
[ -s debian/patches/series ] && quilt push -a
fi

if [ $FAKEROOT ]
then
chown nobody ../ -R
su nobody -c 'dpkg-buildpackage -us -uc -j$PROCESSORS -rfakeroot'
else
dpkg-buildpackage -us -uc -j$PROCESSORS
fi

rm /CurrentlyBuilding
umount /proc
}

sedhelper2(){
  FILE="$1"
  EXPR="$2"";"

  while [ 1"$EXPR" != 1 ];do
    SUBEXPR=$(cut -d\; -f 1 <<< "$EXPR")
    MD5=$(md5sum "$FILE")
    echo Running modification-aware sed: sed "$SUBEXPR" -i "$FILE"
    /bin/sed "$SUBEXPR" -i "$FILE"
    if [ "$MD5" = "$(md5sum "$FILE")" ]; then
      echo File "$FILE" was not modified, stopping.
      exit 1
    fi
    EXPR=$(cut -d\; -f 2- <<< "$EXPR" )
    echo $EXPR | egrep ';' -q || break
  done
}

sedhelper(){
  FILE="$1"
  EXPR="$2"

  MD5=$(md5sum "$FILE")
  echo Running modification-aware sed: sed "$EXPR" -i "$FILE"
  /bin/sed "$EXPR" -i "$FILE"
  if [ "$MD5" = "$(md5sum "$FILE")" ]; then
    echo File "$FILE" was not modified, stopping.
    exit 1
  fi
}

sed (){
if ! echo $@ | grep -qw '\-i'; then
  echo Running fallback sed: /bin/sed "$@"
  /bin/sed "$@"
else

[ 1"$1" = "1-i" ] && shift

  SEDEXPR="$1"
  shift
  for FILE in "$@"; do
  [ 1"$FILE" = "1-i" ] && continue
  if [ -f "$FILE" ]; then
    sedhelper "$FILE" "$SEDEXPR"
  else
    echo File "$FILE" does not exist, stopping.
    exit 1
  fi
  done
fi
}