# GNU Guix --- Functional package management for GNU
# Copyright © 2018 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/>.

#
# Test the 'guix pack --relocatable' using the external store, if any.
#

guix pack --version

# 'guix pack --relocatable' requires a C compiler and libc.a, which our
# bootstrap binaries don't provide.  To make the test relatively inexpensive,
# run it on the user's global store if possible, on the grounds that binaries
# may already be there or can be built or downloaded inexpensively.

NIX_STORE_DIR="`guile -c '(use-modules (guix config))(display %storedir)'`"
localstatedir="`guile -c '(use-modules (guix config))(display %localstatedir)'`"
GUIX_DAEMON_SOCKET="$localstatedir/guix/daemon-socket/socket"
export NIX_STORE_DIR GUIX_DAEMON_SOCKET

if ! guile -c '(use-modules (guix)) (exit (false-if-exception (open-connection)))'
then
    exit 77
fi

STORE_PARENT="`dirname $NIX_STORE_DIR`"
export STORE_PARENT
if test "$STORE_PARENT" = "/"; then exit 77; fi

# This test requires user namespaces and associated command-line tools.
if ! unshare -mrf sh -c 'mount -t tmpfs none "$STORE_PARENT"'
then
    exit 77
fi

test_directory="`mktemp -d`"
export test_directory
trap 'chmod -Rf +w "$test_directory"; rm -rf "$test_directory"' EXIT

tarball="`guix pack -R -S /Bin=bin sed`"
(cd "$test_directory"; tar xvf "$tarball")

# Run that relocatable 'sed' in a user namespace where we "erase" the store by
# mounting an empty file system on top of it.  That way, we exercise the
# wrapper code that creates the user namespace and bind-mounts the store.
unshare -mrf sh -c 'mount -t tmpfs none "$STORE_PARENT"; echo "$STORE_PARENT"/*; "$test_directory/Bin/sed" --version > "$test_directory/output"'
grep 'GNU sed' "$test_directory/output"
class='left'>Commit message (<a href='/guix/log/tests/guix-system.sh?id=c498aaaf110cd7f6950ea47e637725e0513655d4&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-01-21 23:09:55 +0100'>2019-01-21</span></td><td><a href='/guix/commit/tests/guix-system.sh?id=f61e6e5238ff43b959c258ed92531029a1c82fa7'>tests: Adjust for removal of 'device' field in &lt;bootloader-configuration&gt;.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-11 12:14:38 +0100'>2019-01-11</span></td><td><a href='/guix/commit/tests/guix-system.sh?id=84a2de36a10dc2ab80f86e16721cbd228c85279e'>services: Deprecate a few more service procedures.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-10-18 01:12:22 +0200'>2018-10-18</span></td><td><a href='/guix/commit/tests/guix-system.sh?id=39d7fdce453b0ca23ecbed72048647debbaa58a6'>services: dhcp-client: Deprecate 'dhcp-client-service' procedure.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>