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|
#!/bin/bash -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/>.
. /usr/share/libretools/conf.sh
load_conf_libretools_chroot
. libremessages
. /usr/share/devtools/makechrootpkg.sh
# Because the makechrootpkg.sh library functions don't work with -euE
normshell() (
set +euE
"$@"
)
cmd=${0##*/}
usage() {
echo "Usage: $cmd [OPTIONS] COMMAND [ARGS...]"
echo 'Interacts with an archroot (arch chroot).'
echo ''
echo 'There may be multiple chroots; they are stored in $CHROOTDIR.'
echo ''
echo 'Each chroot is named; the default is configured with $CHROOT.'
echo ''
echo "Each named chroot has a master clean copy (named 'root'), and any"
echo 'number of other named copies; the copy used by default is the'
echo "current username (or \$SUDO_USER, or 'copy' if root)."
echo ''
echo 'The full path to the chroot copy is "$CHROOTDIR/$CHROOT/$COPY",'
echo 'Unless the copy name is manually specified as an absolute path,'
echo 'in which case, that path is used.'
echo ''
echo 'The current settings for the above varibles are:'
echo " CHROOTDIR : $CHROOTDIR"
echo " CHROOT : $CHROOT"
echo " COPY : $COPY"
echo " root path : $rootdir"
echo " copy path : $copydir"
echo ''
echo 'If the chroot, or copy does not exist, it will be created'
echo 'automatically.'
echo ''
echo 'This command will make the following configuration changes in'
echo 'the chroot:'
echo " - overwrite \`/etc/libretools.d/chroot.conf'"
echo " - overwrite \`/etc/pacman.d/mirrorlist'"
echo " - set \`CacheDir' in \`/etc/pacman.conf'"
echo ''
echo 'Creating a copy, deleting a copy, or syncing a copy can be fairly'
echo 'slow; but are very fast if $CHROOTDIR is on a btrfs partition.'
echo ''
echo 'Options:'
echo ' -n <CHROOT> Name of the chroot to use'
echo ' -l <COPY> Name of, or absolute path to, the copy to use'
echo ' -N Disable networking in the chroot'
echo ' -C <file> Location of pacman config file'
echo ' -M <file> Location of makepkg config file'
echo ''
echo 'Commands:'
echo ' Create/copy/delete:'
echo ' noop|make Do not do anything, but still creates the'
echo ' chroot copy if it does not exist'
echo " sync Sync the copy with the clean ('root') copy"
echo " delete delete the chroot copy"
echo ' Dealing with packages:'
echo ' install-file FILES... Like `pacman -U FILES...`'
echo ' install-name NAMES... Like `pacman -S NAMES...`'
echo ' update Like `pacman -Syu`'
echo ' clean-pkgs Remove all "exta" packages from the chroot copy'
echo ' Other:'
echo ' run CMD... Run CMD in the chroot copy'
echo ' enter Enter an interactive shell in the chroot copy'
echo ' clean-repo Clean /repo in the chroot copy'
echo ' help Show this message' # usage
}
# Globals: $CHROOTDIR, $CHROOT, $COPY, $rootdir and $copydir
main() {
COPY=$LIBREUSER
[[ $COPY != root ]] || COPY=copy
# defaults
rootdir="${CHROOTDIR}/${CHROOT}/root"
copydir="${CHROOTDIR}/${CHROOT}/${COPY}"
local mode=enter
local archroot_args=()
while getopts 'n:l:NC:M:' arg; do
case $arg in
n) CHROOT=$OPTARG;;
l) COPY=$OPTARG;;
N)
# We do this so that it carries through to
# chroot_* functions
archroot() {
$(which archroot) -N "$@"
}
;;
C|M) archroot_args+=(-$arg "$OPTARG");;
*) usage; return 1;;
esac
done
shift $(($OPTIND - 1))
if [[ $# < 1 ]]; then
error "Must specify a command"
usage
return 1
fi
mode=$1
shift
rootdir="${CHROOTDIR}/${CHROOT}/root"
if [[ ${COPY:0:1} = / ]]; then
copydir=$COPY
else
copydir="${CHROOTDIR}/${CHROOT}/${COPY}"
fi
########################################################################
if [[ $mode == help ]]; then
usage
return 0
fi
if (( EUID )); then
error "This program must be run as root."
return 1
fi
umask 0022
# Keep this lock as long as we are running
# Note that '9' is the same FD number as in (mk)archroot
lock_open_write 9 "$copydir" \
"Waiting for existing lock on chroot copy to be released: [$COPY]"
if [[ ! -d $rootdir ]]; then
msg "Creating 'root' copy for chroot [$CHROOT]"
set +u # if archroot_args is empty, it counts as unbound
archroot "${archroot_args[@]}" -m "$rootdir" base-devel
set -u
fi
if [[ ! -d $copydir ]] || [[ $mode == sync ]]; then
msg "Syncing copy [$COPY] with root copy"
normshell chroot_sync "$CHROOTDIR/$CHROOT" "$COPY"
fi
mkdir -p "$copydir/etc/libretools.d"
{
if [[ -n ${CHROOTEXTRAPKG[@]:-} ]]; then
printf 'CHROOTEXTRAPKG=('
printf "'%s' " "${CHROOTEXTRAPKG[@]}"
printf ')\n'
else
printf 'CHROOTEXTRAPKG=()\n'
fi
} > "$copydir"/etc/libretools.d/chroot.conf
if [[ $mode != delete ]]; then
# "touch" the chroot first
# this will
# - overwrite \`/etc/pacman.d/mirrorlist'"
# - set \`CacheDir' in \`/etc/pacman.conf'"
# - apply -C or -M flags
set +u # if archroot_args is empty, it counts as unbound
archroot "${archroot_args[@]}" -r "$copydir" true
set -u
fi
########################################################################
case "$mode" in
# Creat/copy/delete
noop|make|sync) :;;
delete)
if [[ -d $copydir ]]; then
normshell chroot_delete "$copydir"
fi
;;
# Dealing with packages
install-file) normshell chroot_install_pkgs "$copydir" "$@";;
install-name) archroot -r "$copydir" pacman -Sy "$@";;
clean-pkgs)
trap "rm -f '$copydir'/clean '$copydir'/chrootexec" EXIT
cp -a "$(which chcleanup)" "$copydir/clean"
echo '#!/bin/bash' > "$copydir/chrootexec"
echo 'mkdir /build' >> "$copydir/chrootexec"
echo 'cd /build; /clean' >> "$copydir/chrootexec"
chmod 755 "$copydir/chrootexec"
archroot -r "$copydir" /chrootexec
;;
# Other
run) archroot -r "$copydir" "$@";;
enter) archroot -r "$copydir" bash;;
clean-repo)
rm -rf "${copydir}/repo/*"
bsdtar -czf "${copydir}/repo/repo.db.tar.gz" -T /dev/null
ln -s "repo.db.tar.gz" "${copydir}/repo/repo.db"
;;
*)
error "Unrecognized command: \`$mode'"
return 1
;;
esac
}
main "$@"
|
