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Diffstat (limited to 'src/chroot-tools/librechroot')
-rwxr-xr-x | src/chroot-tools/librechroot | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/chroot-tools/librechroot b/src/chroot-tools/librechroot new file mode 100755 index 0000000..45aec10 --- /dev/null +++ b/src/chroot-tools/librechroot @@ -0,0 +1,230 @@ +#!/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 "$@" |