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#!/bin/sh
# GNU Guix --- Functional package management for GNU
# Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
#
# This file is part of GNU Guix.
#
# GNU Guix is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or (at
# your option) any later version.
#
# GNU Guix 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
# Usage: ./pre-inst-env COMMAND ARG...
#
# Run COMMAND in a pre-installation environment. Typical use is
# "./pre-inst-env guix-build hello".
# By default we may end up with absolute directory names that contain '..',
# which get into $GUILE_LOAD_PATH, leading to '..' in the module file names
# recorded by Guile. To avoid that, make sure we get a real absolute
# directory name.
abs_top_srcdir="`cd "@abs_top_srcdir@" > /dev/null; pwd`"
abs_top_builddir="`cd "@abs_top_builddir@" > /dev/null; pwd`"
GUILE_LOAD_COMPILED_PATH="$abs_top_builddir${GUILE_LOAD_COMPILED_PATH:+:}$GUILE_LOAD_COMPILED_PATH"
GUILE_LOAD_PATH="$abs_top_builddir:$abs_top_srcdir${GUILE_LOAD_PATH:+:}:$GUILE_LOAD_PATH"
export GUILE_LOAD_COMPILED_PATH GUILE_LOAD_PATH
# Define $PATH so that `guix' and friends are easily found.
PATH="$abs_top_builddir/scripts:$abs_top_builddir:$PATH"
export PATH
# Daemon helpers.
NIX_ROOT_FINDER="$abs_top_builddir/nix/scripts/list-runtime-roots"
NIX_SUBSTITUTERS="$abs_top_builddir/nix/scripts/substitute-binary"
NIX_SETUID_HELPER="$abs_top_builddir/nix-setuid-helper"
NIX_BUILD_HOOK="$abs_top_builddir/nix/scripts/offload"
export NIX_ROOT_FINDER NIX_SETUID_HELPER NIX_SUBSTITUTERS NIX_BUILD_HOOK
# The 'guix-register' program.
GUIX_REGISTER="$abs_top_builddir/guix-register"
export GUIX_REGISTER
# The following variables need only be defined when compiling Guix
# modules, but we define them to be on the safe side in case of
# auto-compilation.
NIX_HASH="@NIX_HASH@"
export NIX_HASH
# Define $GUIX_UNINSTALLED to prevent `guix' from
# prepending @guilemoduledir@ to the Guile load paths.
GUIX_UNINSTALLED=1
export GUIX_UNINSTALLED
exec "$@"
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