#! /bin/sh -e

case $# in
  0) echo 2>&1 "usage: ${0##*/} ENV [CMD [ARGS ...]]"; exit 2 ;;
esac
env=$1; shift
case $# in
  0) set -- "$SHELL" ;;
esac

case ${CROSSDIR+t} in
  t) ;;
  *)
    dir=$(pwd)
    p=$0
    while :; do
      case $p in */*) f=${p##*/} p=${p%/*};; *) f=$p p=. ;; esac
      cd $p
      if ! [ -L "$f" ]; then break; fi
      p=$(readlink "$f")
    done
    p=$(pwd)
    CROSSDIR=${p%/bin}; export CROSSDIR
    cd "$dir"
    ;;
esac

if ! [ -f "$CROSSDIR/etc/$env-setup.sh" ]; then
  echo 2>&1 "${0##*/}: cross environment \`$env' unknown"; exit 2
fi

MDW_BUILDENV=$env; export MDW_BUILDENV
if [ -f "$CROSSDIR/etc/$env-config.site" ]; then
  CONFIG_SITE=$CROSSDIR/etc/$env-config.site; export CONFIG_SITE
fi
CROSS_PREFIX=$CROSSDIR/inst.$env; export CROSS_PREFIX
. "$CROSSDIR/etc/$env-setup.sh"
exec "$@"