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#!/bin/bash
# manage-baserock -- Tool to manage (add/list/remove etc) Baserock chroots
# Copyright (C) 2014 Codethink Ltd
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
BASEROCK_BASE="${BASEROCK_BASE:-/opt/baserock/chroots}"
ACTION="$1"
SYSTEM="$2"
URL="$3"
check_system_name () {
local system="$1"
local valid_chars='A-Za-z0-9_-.'
case $system in
*[^${valid_chars}]*)
echo "The specified name '${system}' contains invalid characters."
echo "Valid characters are ${valid_chars}."
exit 1
esac
}
list_baserocks () {
(cd "${BASEROCK_BASE}" && ls -d */baserock) 2>/dev/null | sed -e's@/baserock$@@'
}
case "${ACTION}" in
list)
for SYSTEM in $(list_baserocks); do
if test -e "${BASEROCK_BASE}/${SYSTEM}/default"; then
echo "${SYSTEM} *"
else
echo "${SYSTEM}"
fi
done
;;
add)
if test $(id -u) != "0"; then
exec sudo "$0" "$@"
fi
check_system_name $SYSTEM
if test -d "${BASEROCK_BASE}/${SYSTEM}/baserock"; then
echo "Sorry, $SYSTEM already exists"
exit 1
fi
TEMP_BASE=$(mktemp -d --tmpdir="${BASEROCK_BASE}")
cleanup () { rm -rf "${TEMP_BASE}"; }
trap cleanup 0
if test "x${URL}" = "x${URL##http://}" -a "x${URL}" = "x${URL##https://}"; then
if ! ln -s "$(readlink -e "${URL}")" "${TEMP_BASE}/tarball"; then
echo "Sorry, could not link ${URL} into place";
exit 1;
fi
else
if ! wget -O "${TEMP_BASE}/tarball" "$URL"; then
echo "Sorry, could not download ${URL}";
exit 1;
fi
fi
mkdir "${TEMP_BASE}/root"
if ! tar -C "${TEMP_BASE}/root" -xf "${TEMP_BASE}/tarball"; then
echo "Sorry, could not unpack ${URL}";
exit 1;
fi
ENTRIES=$(ls "${TEMP_BASE}/root" | wc -l | sed -e's/^ *//;s/ *$//')
if test "x${ENTRIES}" = "x1"; then
mv "${TEMP_BASE}/root/"* "${BASEROCK_BASE}/${SYSTEM}"
else
mv "${TEMP_BASE}/root" "${BASEROCK_BASE}/${SYSTEM}"
fi
if ! test -d "${BASEROCK_BASE}/${SYSTEM}/baserock"; then
echo "Sorry, ${URL} does not appear to contain a baserock system";
rm -rf "${BASEROCK_BASE}/${SYSTEM}";
exit 1;
fi
NR_BRS=$(list_baserocks | wc -l | sed -e's/^ *//;s/ *$//')
if test "$NR_BRS" = "1"; then
touch "${BASEROCK_BASE}/${SYSTEM}/default"
fi
if ! test -r "${BASEROCK_BASE}/${SYSTEM}/root/.bashrc"; then
cat > "${BASEROCK_BASE}/${SYSTEM}/root/.bashrc" <<EOF
PS1="\u@\h(baserock-${SYSTEM}):\w\$ "
EOF
fi
if ! test -r "${BASEROCK_BASE}/${SYSTEM}/root/.bash_profile"; then
cat > "${BASEROCK_BASE}/${SYSTEM}/root/.bash_profile" <<EOF
. ~/.bashrc
EOF
fi
if ! test -d "${BASEROCK_BASE}/${SYSTEM}/src"; then
mkdir "${BASEROCK_BASE}/${SYSTEM}/src"
fi
br-ct-sync-chroots
;;
rm)
if test $(id -u) != "0"; then
exec sudo "$0" "$@"
fi
if ! test -d "${BASEROCK_BASE}/${SYSTEM}/baserock"; then
echo "Sorry, $SYSTEM does not exist or is not a baserock chroot"
exit 1
fi
rm -rf "${BASEROCK_BASE}/${SYSTEM}"
br-ct-sync-chroots
;;
set-default)
if test $(id -u) != "0"; then
exec sudo "$0" "$@"
fi
if ! test -d "${BASEROCK_BASE}/${SYSTEM}/baserock"; then
echo "Sorry, $SYSTEM does not exist or is not a baserock chroot"
exit 1
fi
rm -f "${BASEROCK_BASE}/"*/default
touch "${BASEROCK_BASE}/${SYSTEM}/default"
br-ct-sync-chroots
;;
*)
echo >&2 "usage: $0 list | add <name> <url> | rm <name> | set-default <name>"
exit 1
;;
esac
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