#!/bin/sh

#	Copyright (C) 2003 Free Software Foundation
#
#   This file is part of GUILE.
#
# This script is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

# NOTE: If you update this file, please update pre-inst-guile.in as
# well, if appropriate.

# Usage: pre-inst-guile-env [ARGS]

# This script arranges for the environment to support running Guile
# from the build tree.  The following env vars are modified (but not
# clobbered): GUILE_LOAD_PATH, LTDL_LIBRARY_PATH, and PATH.

# Example: pre-inst-guile-env guile -c '(display "hello\n")'
# Example: ../../pre-inst-guile-env ./guile-test-foo

# config
subdirs_with_ltlibs="srfi guile-readline"       # maintain me

# env (set by configure)
top_srcdir="@top_srcdir_absolute@"
top_builddir="@top_builddir_absolute@"

[ x"$top_srcdir"   = x -o ! -d "$top_srcdir" -o \
  x"$top_builddir" = x -o ! -d "$top_builddir" ] && {
    echo $0: bad environment
    echo top_srcdir=$top_srcdir
    echo top_builddir=$top_builddir
    exit 1
}

if [ x"$GUILE_LOAD_PATH" = x ]
then
    GUILE_LOAD_PATH="${top_srcdir}/guile-readline:${top_srcdir}"
else
  for d in "${top_srcdir}" "${top_srcdir}/guile-readline"
  do
    # This hair prevents double inclusion.
    # The ":" prevents prefix aliasing.
    case x"$GUILE_LOAD_PATH" in
      x*${d}:*) ;;
      *) GUILE_LOAD_PATH="${d}:$GUILE_LOAD_PATH" ;;
    esac
  done
fi
export GUILE_LOAD_PATH

# handle LTDL_LIBRARY_PATH (no clobber)
ltdl_prefix=""
for dir in $subdirs_with_ltlibs ; do
    ltdl_prefix="${top_builddir}/${dir}:${ltdl_prefix}"
done
LTDL_LIBRARY_PATH="${ltdl_prefix}$LTDL_LIBRARY_PATH"
export LTDL_LIBRARY_PATH

# handle PATH (no clobber)
PATH="${top_builddir}/guile-config:${PATH}"
PATH="${top_builddir}/libguile:${PATH}"
export PATH

exec "$@"