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# pro-archman
# src/pro-archman.sh
# Main program file
#
# Copyright (C) 2013 Patrick "P. J." McDermott
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
set -u
# Constant global variables
PKGLIBDIR='@@PKGLIBDIR@@'
PKGLIBCMDDIR='@@PKGLIBCMDDIR@@'
PKGLIBCMD='@@PKGLIBCMD@@'
LF='
'
OPTSTRING='hVvb:'
# Global variables
loading_cmd=
base_dir=
conf_incoming_channel=
conf_incoming_dir=
conf_pool_gc_delay=
conf_verbose=
conf_gzip=
lock=
exit_status=
# use() must be defined inline so it can be used to load other modules.
use()
{
local module="${1}"
local default_dir=
local lib_subdir=
local dir=
if [ "x${module%/*}" = "x${module}" ]; then
default_dir="${PKGLIBDIR}"
lib_subdir=''
else
case "${module%/*}" in
'cmd')
loading_cmd="$(printf '%s' "${module##*/}" | \
tr '[A-Z]' '[a-z]' | \
tr -C '[a-z0-9_]' '_')"
default_dir="${PKGLIBCMDDIR}"
lib_subdir='cmd'
;;
esac
fi
if [ "${ARCHMAN_LIBDIR+set}" = 'set' ]; then
dir="${ARCHMAN_LIBDIR:-.}/${lib_subdir}"
else
dir="${default_dir}"
fi
if [ -f "${dir}/${module##*/}.sho" ]; then
. "${dir}/${module##*/}.sho"
else
printf '%s: Error: Failed to load module "%s": %s\n' \
"${0##*/}" "${module}" 'no such file or directory' >&2
exit 2
fi
}
main()
{
local cmd=
local status=
init_sigs
load_locale
load_cmds
get_options "${@}"
shift $(($OPTIND - 1))
base_dir="${opt_b:-.}"
if ${opt_h:-false}; then
cmd='help'
elif ${opt_V:-false}; then
cmd='version'
elif [ ${#} -lt 1 ]; then
cmd_help_main >&2
exit 1
else
cmd="${1}"
shift
fi
run_cmd "${cmd}" "${@}"
status=${?}
return ${status}
}
init_sigs()
{
local i=
local sig=
# We need the signal *number* in the signal handler. The only portable
# and easy way to get the number of a named signal is to search for it
# as in the following loop hack.
i=0
while [ ${i} -lt 127 ]; do
i=$(($i + 1))
sig="$(kill -l ${i} 2>/dev/null)" || continue
case "${sig}" in
'HUP' | 'INT' | 'QUIT' | 'ABRT' | 'ALRM' | 'TERM')
trap "handle_sig ${i}" ${i}
;;
esac
done
}
get_options()
{
local opt=
unset OPTARG
while getopts "${OPTSTRING}" opt; do
if [ "x${opt}" != 'x?' ]; then
eval "opt_${opt}=\"\${OPTARG:-true}\""
fi
unset OPTARG
done
return 0
}
init()
{
lock
get_conf
}
lock()
{
mkdir -p "${base_dir}/.db"
lock="${base_dir}/.db/lock"
if ! (set -C; printf '%d\n' "${$}" >"${lock}") 2>/dev/null; then
error 2 "$(get_msg 'lock_fail')"
fi
}
get_conf()
{
local old_dir=
# Set defaults.
conf_incoming_channel='dev'
conf_incoming_dir='../incoming'
conf_pool_gc_delay=86400
conf_verbose=false
conf_gzip=true
if [ -f "${base_dir}/conf" ]; then
. "${base_dir}/conf"
fi
old_dir="$(pwd)"
cd "${base_dir}"
if [ -d "${conf_incoming_dir}" ]; then
conf_incoming_dir="$(cd "${conf_incoming_dir}" && pwd)"
fi
cd "${old_dir}"
case "${conf_verbose}" in
'false' | '0' | 'off' | 'no') conf_verbose=false;;
*) conf_verbose=true;;
esac
return 0
}
fini()
{
update_feeds
collect_garbage
unlock
}
unlock()
{
rm -f "${lock}"
}
handle_sig()
{
local sig="${1}"
unlock
if [ "x${exit_status:+set}" = 'xset' ]; then
exit ${exit_status}
else
exit $((128 + $sig))
fi
}
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