#!/bin/sh

BUILDDIR=${BUILDDIR:-/usr/build}
LOCALBASE=${LOCALBASE:-/usr/local}
PORTSDIR=${PORTSDIR:-/usr/ports}
PORT_DBDIR=${PKG_DBDIR:-$BUILDDIR/db_ports}
PKG_DBDIR=${PKG_DBDIR:-$BUILDDIR/db_pkg}
PACKAGES=${PACKAGES:-$BUILDDIR/packages}

MAKE="env LOCALBASE=$LOCALBASE PORTSDIR=$PORTSDIR PORT_DBDIR=$PORT_DBDIR PKG_DBDIR=$PKG_DBDIR PACKAGES=$PACKAGES make"

set -e

mkdir -p $BUILDDIR $LOCALBASE $PKG_DBDIR $PACKAGES

port2name() {

  echo $1 | sed 's|[/.-]|_|g'

}

port2pkg() {

  local pkg_name=
  local port=

  port=$1; shift
  eval pkg_name=PKG$(port2name $port)
  eval pkg=\$$pkg_name
  if [ -z "$pkg" ]
  then
    pkg=$($MAKE -C $port -V PKGNAME)
    eval $pkg_name=$pkg
  fi

}

depends() {

  local depend=
  local depends_name=
  local _deps=
  local name=
  local port=

  port=$1

  eval depends_name=DEPEND$(port2name $port)
  eval deps=\"\$$depends_name\"

  if [ -z "$deps" ]
  then
    echo "Getting dependancies for $port" > /dev/stderr

    depend_list="$($MAKE -C $port -V BUILD_DEPENDS -V LIB_DEPENDS -V RUN_DEPENDS)"
    for depend in $depend_list
    do
      name=$(echo $depend | cut -f 2 -d ':')
      depends $name
      _deps="$_deps $deps $name"
    done

    deps=$(for depend in $_deps
    do
      echo $depend
    done | sort -u)

    depends_name=$depends_name
    eval $depends_name=\"$deps \"
  fi

}

build() {

  local _deps=
  local dep=
  local port=

  port=$1

  depends $port
  _deps="$deps"
  for dep in $_deps
  do
    port2pkg $dep
    if [ ! -d $BUILDDIR/$pkg ]
    then
      if ! build $dep
      then
        echo "Port $port failed due to dependancy $dep"
        return 255
      fi
    fi
  done

  echo "Building port $port..."

  for pkg in $_deps
  do
    port2pkg $pkg
    mount -t unionfs -r -o noatime $BUILDDIR/$pkg $LOCALBASE
  done
  port2pkg $port
  mkdir -p $BUILDDIR/$pkg
  mount -t unionfs -o noatime $BUILDDIR/$pkg $LOCALBASE

  set +e
  trap "true" INT TERM EXIT
  $MAKE -C $port clean build install package -DNO_DEPENDS -DBATCH
  status=$?
  trap - INT TERM EXIT
  set -e

  umount $LOCALBASE
  for pkg in $(echo $_deps | sort -r)
  do
    #port2pkg $pkg
    umount $LOCALBASE
  done

  if [ $status -ne 0 ]
  then
    echo "Port $port failed to build"
    rm -rf $BUILDDIR/$pkg || (chflags -R 0 $BUILDDIR/$pkg; rm -rf $BUILDDIR/$pkg)
  else
    $MAKE -C $port clean
  fi

  return $status

}

build /usr/ports/x11/xorg