#!/bin/sh

[ $# -lt 1 ] && echo "Usage: `basename $0` %{buildroot}%{ghclibdir} ..." && exit 1

set +x

PKGBASEDIR=$1
shift
PKGCONFDIR=$PKGBASEDIR/package.conf.d
GHC_VER=$(basename $PKGBASEDIR | sed -e s/ghc-//)

# for a ghc build use the new ghc-pkg
INPLACE_GHCPKG=$PKGBASEDIR/../../bin/ghc-pkg-$GHC_VER

if [ -x "$INPLACE_GHCPKG" ]; then
    case $GHC_VER in
        7.4.*)
            GHC_PKG="$PKGBASEDIR/ghc-pkg --global-conf=$PKGCONFDIR"
            ;;
        7.6.*)
            GHC_PKG="$PKGBASEDIR/ghc-pkg --global-package-db=$PKGCONFDIR"
            ;;
        # 7.8 and 7.10
        *)
            GHC_PKG="env LD_LIBRARY_PATH=$(dirname $PKGBASEDIR) $PKGBASEDIR/bin/ghc-pkg --global-package-db=$PKGCONFDIR"
            ;;
    esac
else
    GHC_PKG="/usr/bin/ghc-pkg-${GHC_VER} -f $PKGCONFDIR"
fi

$GHC_PKG -v0 --simple-output $* | uniq