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diff --git a/src/chroot-tools/librechroot b/src/chroot-tools/librechroot
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+#!/usr/bin/env bash
+set -euE
+# librechroot
+
+# Copyright 2010 Nicolás Reynolds
+# Copyright 2011 Joshua Haase
+# Copyright 2012-2013 Luke Shumaker
+#
+# This file is part of Parabola.
+#
+# Parabola 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.
+#
+# Parabola 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 Parabola. If not, see <http://www.gnu.org/licenses/>.
+
+# HACKING: if a command is added or removed, it must be changed in 3 places:
+# - the usage() text
+# - the commands=() array
+# - the case statement in main()
+
+. $(librelib conf)
+load_files chroot
+
+. libremessages
+
+shopt -s nullglob
+umask 0022
+
+readonly _arch_nspawn=$(librelib chroot/arch-nspawn)
+readonly _mkarchroot=$(librelib chroot/mkarchroot)
+readonly _makechrootpkg=$(librelib chroot/makechrootpkg.sh)
+
+# Because the makechrootpkg.sh library functions don't work with -euE
+_makechrootpkg() (
+ set +euE
+ . "$_makechrootpkg"
+ "$@"
+)
+
+# Usage: make_empty_repo $copydir
+make_empty_repo() {
+ local copydir=$1
+ mkdir -p "${copydir}/repo"
+ bsdtar -czf "${copydir}/repo/repo.db.tar.gz" -T /dev/null
+ ln -s "repo.db.tar.gz" "${copydir}/repo/repo.db"
+}
+
+# Usage: chroot_add_to_local_repo $copydir $pkgfiles...
+chroot_add_to_local_repo() {
+ local copydir=$1; shift
+ mkdir -p "$copydir/repo"
+ local pkgfile
+ for pkgfile in "$@"; do
+ cp "$pkgfile" "$copydir/repo"
+ pushd "$copydir/repo" >/dev/null
+ repo-add repo.db.tar.gz "${pkgfile##*/}"
+ popd >/dev/null
+ done
+}
+
+usage() {
+ eval "$(calculate_directories)"
+ print "Usage: %s [OPTIONS] COMMAND [ARGS...]" "${0##*/}"
+ print 'Interacts with an archroot (arch chroot).'
+ echo
+ prose 'This is configured with `chroot.conf`, either in
+ `/etc/libretools.d/`, or `$XDG_CONFIG_HOME/libretools/`.
+ The variables you may set are $CHROOTDIR, $CHROOT, and
+ $CHROOTEXTRAPKG.'
+ echo
+ prose 'There may be multiple chroots; they are stored in $CHROOTDIR.'
+ echo
+ prose 'Each chroot is named; the default is configured with $CHROOT.'
+ echo
+ prose 'Each named chroot has a master clean copy (named `root`), and any
+ number of other named copies; the copy used by default is the
+ current username (or $SUDO_USER, or `copy` if root).'
+ echo
+ prose 'The full path to the chroot copy is "$CHROOTDIR/$CHROOT/$COPY",
+ unless the copy name is manually specified as an absolute path,
+ in which case, that path is used.'
+ echo
+ prose 'The current settings for the above varibles are:'
+ printf ' CHROOTDIR : %s\n' "${CHROOTDIR:-$(_ 'ERROR: NO SETTING')}"
+ printf ' CHROOT : %s\n' "${CHROOT:-$(_ 'ERROR: NO SETTING')}"
+ printf ' COPY : %s\n' "$COPY"
+ printf ' rootdir : %s\n' "${rootdir:-$(_ 'ERROR')}"
+ printf ' copydir : %s\n' "${copydir:-$(_ 'ERROR')}"
+ echo
+ prose 'If the chroot, or copy does not exist, it will be created
+ automatically. A chroot by default contains the packages in the
+ group "base-devel", and any packages named in $CHROOTEXTRAPKG.
+ Unless the `-C` or `-M` flags are used, the configuration files
+ that this program installs are the stock versions supplied in the
+ packages, not the versions from your host system. Other tools
+ (such as libremakepkg) may alter the configuration.'
+ echo
+ prose 'This command will make the following configuration changes in the
+ chroot:'
+ bullet 'overwrite `/etc/libretools.d/chroot.conf`'
+ bullet 'overwrite `/etc/pacman.d/mirrorlist`'
+ bullet 'set `CacheDir` in `/etc/pacman.conf`'
+ prose 'If a new `pacman.conf` is inserted with the `-C` flag, the change
+ is made after the file is copied in; the `-C` flag doesn'\''t
+ stop the change from being effective.'
+ echo
+ prose 'Creating a copy, deleting a copy, or syncing a copy can be fairly
+ slow; but are very fast if $CHROOTDIR is on a btrfs partition.'
+ echo
+ print 'Options:'
+ flag "-n <$(_ CHROOT)>" 'Name of the chroot to use'
+ flag "-l <$(_ COPY)>" 'Name of, or absolute path to, the copy to use'
+ flag '-N' 'Disable networking in the chroot'
+ flag "-C <$(_ FILE)>" 'Copy this file to `$copydir/etc/pacman.conf`'
+ flag "-M <$(_ FILE)>" 'Copy this file to `$copydir/etc/makepkg.conf`'
+ flag "-w <$(_ 'PATH[:PATH]')>" 'Bind mount a file or directory, read/write'
+ flag "-r <$(_ 'PATH[:PATH]')>" 'Bind mount a file or directory, read-only'
+ echo
+ print 'Commands:'
+ print ' Create/copy/delete:'
+ flag 'noop|make' 'Do not do anything, but still creates the chroot
+ copy if it does not exist'
+ flag 'sync' 'Sync the copy with the clean (`root`) copy'
+ flag 'delete' 'Delete the chroot copy'
+ print ' Dealing with packages:'
+ flag "install-file $(_ FILES...)" 'Like `pacman -U FILES...`'
+ flag "install-name $(_ NAMES...)" 'Like `pacman -S NAMES...`'
+ flag 'update' 'Like `pacman -Syu`'
+ flag 'clean-pkgs' 'Remove all packages from the chroot copy that
+ are not in base-devel, $CHROOTEXTRAPKG, or named
+ as a dependency in the file `/build/PKGBUILD` in
+ the chroot copy'
+ print ' Other:'
+ flag "run $(_ CMD...)" 'Run CMD in the chroot copy'
+ flag 'enter' 'Enter an interactive shell in the chroot copy'
+ flag 'clean-repo' 'Clean /repo in the chroot copy'
+ flag 'help' 'Show this message'
+}
+readonly commands=(
+ noop make sync delete
+ install-file install-name update clean-pkgs
+ run enter clean-repo help
+)
+
+# set $rootdir and $copydir; blank them on error
+calculate_directories() {
+ # Don't assume that CHROOTDIR or CHROOT are set,
+ # but assume that COPY is set.
+ local rootdir copydir
+
+ if [[ -n ${CHROOTDIR:-} ]] && [[ -n ${CHROOT:-} ]]; then
+ rootdir="${CHROOTDIR}/${CHROOT}/root"
+ else
+ rootdir=''
+ fi
+
+ if [[ ${COPY:0:1} = / ]]; then
+ copydir=$COPY
+ elif [[ -n ${CHROOTDIR:-} ]] && [[ -n ${CHROOT:-} ]]; then
+ copydir="${CHROOTDIR}/${CHROOT}/${COPY}"
+ else
+ copydir=''
+ fi
+
+ declare -p rootdir
+ declare -p copydir
+}
+
+arch_nspawn_flags=()
+sysd_nspawn_flags=()
+arch-nspawn() {
+ local copydir=$1; shift
+ set +u # if an array is empty, it counts as unbound
+ "$_arch_nspawn" "${arch_nspawn_flags[@]}" "$copydir" "${sysd_nspawn_flags[@]}" -- "$@"
+ set -u
+}
+
+# Globals: $CHROOTDIR, $CHROOT, $COPY, $rootdir and $copydir
+main() {
+ COPY=$LIBREUSER
+ [[ $COPY != root ]] || COPY=copy
+
+ local mode=enter
+ while getopts 'n:l:NC:M:w:r:' opt; do
+ case $opt in
+ n) CHROOT=$OPTARG;;
+ l) COPY=$OPTARG;;
+ N) sysd_nspawn_flags+=(--private-network);;
+ C|M) arch_nspawn_flags+=(-$opt "$OPTARG");;
+ w) sysd_nspawn_flags+=("--bind=$OPTARG");;
+ r) sysd_nspawn_flags+=("--bind-ro=$OPTARG");;
+ *) usage >/dev/stderr; return 1;;
+ esac
+ done
+ shift $(($OPTIND - 1))
+ if [[ $# -lt 1 ]]; then
+ error "Must specify a command"
+ usage >/dev/stderr
+ return 1
+ fi
+ mode=$1
+ if ! in_array "$mode" "${commands[@]}"; then
+ error "Unrecognized command: %s" "$mode"
+ usage >/dev/stderr
+ return 1
+ fi
+ shift
+
+ if [[ $mode == help ]]; then
+ usage
+ return 0
+ fi
+
+ check_vars chroot CHROOTDIR CHROOT
+ eval "$(calculate_directories)"
+
+ readonly LIBREUSER LIBREHOME
+ readonly CHROOTDIR CHROOT COPY
+ readonly rootdir copydir
+ readonly mode
+
+ ########################################################################
+
+ if (( EUID )); then
+ error "This program must be run as root."
+ return 1
+ fi
+
+ umask 0022
+
+ # Keep this lock as long as we are running
+ # Note that '9' is the same FD number as in mkarchroot et al.
+ lock 9 "$copydir.lock" \
+ "Waiting for existing lock on chroot copy to be released: [%s]" "$COPY"
+
+ if [[ ! -d $rootdir ]]; then
+ msg "Creating 'root' copy for chroot [%s]" "$CHROOT"
+ set +u # if an array is empty, it counts as unbound
+ "$_mkarchroot" "${arch_nspawn_flags[@]}" "$rootdir" base-devel
+ set -u
+ make_empty_repo "$rootdir"
+ fi
+
+ if [[ ! -d $copydir ]] || [[ $mode == sync ]]; then
+ msg "Syncing copy [%s] with root copy" "$COPY"
+ _makechrootpkg sync_chroot "$CHROOTDIR/$CHROOT" "$COPY"
+ fi
+
+ mkdir -p "$copydir/etc/libretools.d"
+ {
+ if [[ -n ${CHROOTEXTRAPKG[*]:-} ]]; then
+ declare -p CHROOTEXTRAPKG | sed -r 's/declare( -.)* //'
+ else
+ printf 'CHROOTEXTRAPKG=()\n'
+ fi
+ } > "$copydir"/etc/libretools.d/chroot.conf
+
+ if [[ $mode != delete ]]; then
+ # "touch" the chroot first
+ # this will
+ # - overwrite \`/etc/pacman.d/mirrorlist'"
+ # - set \`CacheDir' in \`/etc/pacman.conf'"
+ # - apply -C or -M flags
+ arch-nspawn "$copydir" true
+ arch_nspawn_flags=() # XXX dirty hack, don't apply -C or -M again
+ fi
+
+ ########################################################################
+
+ case "$mode" in
+ # Creat/copy/delete
+ noop|make|sync) :;;
+ delete)
+ if [[ -d $copydir ]]; then
+ _makechrootpkg delete_chroot "$copydir" "$COPY"
+ fi
+ ;;
+
+ # Dealing with packages
+ install-file)
+ _makechrootpkg install_packages "$copydir" "$@"
+ chroot_add_to_local_repo "$copydir" "$@"
+ ;;
+ install-name)
+ arch-nspawn "$copydir" pacman -Sy "$@"
+ ;;
+ update)
+ arch-nspawn "$copydir" pacman -Syu --noconfirm
+ ;;
+ clean-pkgs)
+ trap "rm -f '$copydir'/bin/chcleanup '$copydir'/chrootexec" EXIT
+ install -m755 "$(librelib chroot/chcleanup)" "$copydir/bin/chcleanup"
+ printf '%s\n' \
+ '#!/bin/bash' \
+ 'mkdir -p /build' \
+ 'cd /build' \
+ '/bin/chcleanup' \
+ > "$copydir/chrootexec"
+ chmod 755 "$copydir/chrootexec"
+ arch-nspawn "$copydir" /chrootexec
+ ;;
+
+ # Other
+ run)
+ arch-nspawn "$copydir" "$@"
+ ;;
+ enter)
+ arch-nspawn "$copydir" bash
+ ;;
+ clean-repo)
+ rm -rf "${copydir}"/repo/*
+ make_empty_repo "$copydir"
+ ;;
+ esac
+}
+
+main "$@"
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