src/pro-archman.sh: Rename to src/main.sh

1 files changed, 223 insertions, 0 deletions

diff --git a/src/main.sh b/src/main.sh
new file mode 100644
index 0000000..e17b751
--- /dev/null
+++ b/src/main.sh
@@ -0,0 +1,223 @@
+#!@@SH@@
+#
+# 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
+}
+
+use locale
+use cmd
+use index
+use garbage
+
+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 + $sig))
+	fi
+}
+
+main "${@}"