#! /bin/bash
export LANG=C
export LC_ALL=C

function copydsc () {
    local DSCFILE="$1"
    local TARGET="$2"
    for FILE in \
      "$DSCFILE" \
      $(echo "$DSCFILE" | sed 's/^\(.*\)\.dsc$/\1/' ).diff.gz \
      $(echo "$DSCFILE" | sed 's/^\(.*\)\.dsc$/\1/').tar.gz \
      $(echo "$DSCFILE" | sed 's/\(.*\)-[^-]*\.dsc$/\1/').orig.tar.gz ; do
        cp "$FILE" "$TARGET" ;
    done
}

function checkbuilddep_internal () {
# Use this function to fulfill the dependency (almost)
    local ARCH=$(dpkg --print-architecture)
    echo " -> Attempting to parse the build-deps by myself"
    for INSTALLPKGMULTI in $(grep "^Build-Depends\(-Indep\|\): " "$BUILDPLACE/"tmp/buildd/*/debian/control | \
	sed 's/^[^:]*: \(.*\)$/\1/' | \
	tr " " "/" | \
	awk 'BEGIN{RS=","} {print}'); do
      #echo " -> Considering $INSTALLPKGMULTI"
      SATISFIED="no"
      for INSTALLPKG in $(echo "$INSTALLPKGMULTI" | \
	  awk 'BEGIN{RS="|"} {print}'); do
	#echo " -> Trying to install $INSTALLPKG"
	if echo "$INSTALLPKG" | grep '\[' > /dev/null ; then
	  # this package has arch-deps.
	    if echo "$INSTALLPKG" | sed 's/.*\(\[.*\]\)/\1/' | grep "[[/]!$ARCH[]/]" > /dev/null; then
	      # don't install this on this arch -- satisfied? maybe. FIXME
		SATISFIED="yes"
		continue;
	    fi
	    if ! echo "$INSTALLPKG" | sed 's/.*\(\[.*\]\)/\1/' | grep "[[/]$ARCH[]/]" > /dev/null; then
	      # this arch is not listed. -- satisfied? maybe. FIXME
		SATISFIED="yes"
		continue;
	    fi
	fi
	#echo " -> Installing $INSTALLPKG"
	$CHROOTEXEC usr/bin/apt-get -y install $(echo "$INSTALLPKG" | tr "/" " " | awk '{print $1}') && \
	    SATISFIED="yes"
      done;
      if [ "$SATISFIED" = "no" ]; then
	  echo Could not satisfy build-dependency.
	  abortingfunction
	  exit 1
      fi
    done;
    for INSTALLPKG in $(grep "^Build-Conflicts\(-Indep\|\): " "$BUILDPLACE/"tmp/buildd/*/debian/control | \
	sed 's/^[^:]*: \(.*\)$/\1/' | \
	tr " " "/" | \
	awk 'BEGIN{RS=","} {print}'); do
      #echo " -> Considering $INSTALLPKG"
      if echo "$INSTALLPKG" | grep '\[' > /dev/null ; then
	  # this package has arch-conflicts.
	  if echo "$INSTALLPKG" | sed 's/.*\(\[.*\]\)/\1/' | grep "[[/]!$ARCH[]/]" > /dev/null; then
	      # don't install this on this arch
	      continue;
	  fi
	  if ! echo "$INSTALLPKG" | sed 's/.*\(\[.*\]\)/\1/' | grep "[[/]$ARCH[]/]" > /dev/null; then
	      # this arch is not listed.
	      continue;
	  fi
      fi
      #echo " -> Removing $INSTALLPKG"
      $CHROOTEXEC usr/bin/apt-get -y remove $(echo "$INSTALLPKG" | tr "/" " " | awk '{print $1}') || (
	  echo Could not satisfy build-conflicts
	  abortingfunction
	  exit 1
      )
    done
}

function checkbuilddep_using_dpkgcheckbuilddeps () {
    # this function is not used currently... and is incomplete.
    for INSTALLPKG in $($CHROOTEXEC bin/sh -c "(cd tmp/buildd/*/; dpkg-checkbuilddeps)" 2>&1 | \
	grep "^dpkg-checkbuilddeps: Unmet build dependencies: " | \
	sed 's/^[^:]*:[^:]*: \(.*\)$/\1/' | \
	awk 'BEGIN{RS=", "} {print $1}'); do
      echo " -> Installing $INSTALLPKG"
      $CHROOTEXEC usr/bin/apt-get -y install "$INSTALLPKG"
    done
    for REMOVEPKG in $($CHROOTEXEC bin/sh -c "(cd tmp/buildd/*/; dpkg-checkbuilddeps)" 2>&1 | \
	grep "^dpkg-checkbuilddeps: Build conflicts: " | \
	sed 's/^[^:]*:[^:]*: \(.*\)$/\1/' | \
	awk 'BEGIN{RS=", "} {print $1}'); do
      echo " -> Removing $REMOVEPKG"
      $CHROOTEXEC usr/bin/apt-get -y remove "$REMOVEPKG"
    done
}

function checkbuilddep () {
    checkbuilddep_internal;
}

. /usr/lib/pbuilder/pbuilder-checkparams

PACKAGENAME="$1"
CHROOTEXEC="chroot $BUILDPLACE "

if [ ! -f "$PACKAGENAME" ]; then
    echo "Command line parameter [$PACKAGENAME] is not a valid .dsc file name" >&2
    exit 1;
fi;

extractbuildplace 

echo Copying source file
copydsc "$PACKAGENAME" "$BUILDPLACE/tmp/buildd"
echo Extracting source
$CHROOTEXEC /bin/bash -c "( cd tmp/buildd; /usr/bin/dpkg-source -x $(basename $PACKAGENAME) )" || (
    echo pbuilder: Failed extracting the source >&2 
    abortingfunction
    exit 1;
)
echo Installing the build-deps
checkbuilddep
echo Building the package
$CHROOTEXEC /bin/bash -c "(cd tmp/buildd/*/; dpkg-buildpackage)" || (
    echo pbuilder: Failed autobuilding of package >&2
    abortingfunction
    exit 1;    
)

umountproc

test -n "$BUILDRESULT" && (
    mkdir -p "$BUILDRESULT"
    if [ -d "$BUILDRESULT" ]; then
	cp "$BUILDPLACE"/tmp/buildd/* "$BUILDRESULT"
    else
	echo "Error: BUILDRESULT=[$BUILDRESULT] and is not a directory." >&2
    fi
)

cleanbuildplace