lib/cmd.sh: New file.

2 files changed, 123 insertions, 1 deletions

diff --git a/lib/cmd.sh b/lib/cmd.sh
new file mode 100644
index 0000000..d8550f0
--- /dev/null
+++ b/lib/cmd.sh
@@ -0,0 +1,121 @@
+# ProteanOS Development Kit
+# lib/cmd.sh
+# Command-related functions
+#
+# 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/>.
+
+[ "x${_CMD_SM+set}" = 'xset' ] && return 0
+_CMD_SM=1
+
+use output
+use locale
+
+CMDS='@cmds@'
+
+load_cmds()
+{
+	local cmd=
+
+	for cmd in ${CMDS}; do
+		use "cmd/${cmd}"
+	done
+}
+
+print_opt_summaries()
+{
+	local padding=
+	local opt=
+	local opt_out=
+	local summary=
+
+	padding="$(printf '%24s' '')"
+	for opt in $(printf '%s' "${OPTSTRING}" | sed 's/\([a-zA-Z0-9]\)/ \1/g')
+	do
+		if [ ${#opt} -eq 1 ]; then
+			# No argument expected.
+			opt_out="-${opt}"
+		else
+			# Argument expected.
+			opt="${opt%?}"
+			opt_out="-${opt} $(get_msg "opt_${opt}_arg")"
+		fi
+		if [ ${#opt_out} -gt 20 ]; then
+			printf '  %s\n%24s' "${opt_out}" ''
+		else
+			printf '  %-20s  ' "${opt_out}"
+		fi
+		summary="$(get_msg "opt_${opt}_summary")"
+		printf '%s\n' "${summary}" | fold -s -w 56 | \
+			sed "2,\$s/^/${padding}/;"
+	done
+}
+
+print_cmd_summaries()
+{
+	local padding=
+	local cmd=
+	local cmd_clean=
+	local summary=
+
+	padding="$(printf '%24s' '')"
+	for cmd in ${CMDS}; do
+		if [ ${#cmd} -gt 20 ]; then
+			printf '  %s\n%24s' "${cmd}" ''
+		else
+			printf '  %-20s  ' "${cmd}"
+		fi
+		cmd_clean="$(printf '%s' "${cmd}" | \
+			tr '[A-Z]' '[a-z]' | tr -C '[a-z0-9_]' '_')"
+		summary="$(get_msg "cmd_${cmd_clean}_summary")"
+		printf '%s\n' "${summary}" | fold -s -w 56 | \
+			sed "2,\$s/^/${padding}/;"
+	done
+}
+
+print_cmd_usage()
+{
+	local cmd="${1}"
+	local cmd_clean=
+	local usage=
+
+	cmd_clean="$(printf '%s' "${cmd}" | \
+		tr '[A-Z]' '[a-z]' | tr -C '[a-z0-9_]' '_')"
+	usage="$(get_msg "cmd_${cmd_clean}_usage")"
+
+	printf "$(get_msg 'cmd_usage')\n" "${0}" "${cmd}" "${usage}"
+}
+
+is_cmd()
+{
+	local cmd="${1}"
+
+	[ "x$(printf '%s\n' ${CMDS} | grep "^${cmd}$")" = "x${cmd}" ]
+}
+
+run_cmd()
+{
+	local cmd="${1}"
+	local cmd_clean=
+	shift
+
+	cmd_clean="$(printf '%s' "${cmd}" | \
+		tr '[A-Z]' '[a-z]' | tr -C '[a-z0-9_]' '_')"
+	if is_cmd "${cmd}"; then
+		"cmd_${cmd_clean}_main" "${@}"
+	else
+		error 1 "$(get_msg 'cmd_not_found')" "${cmd}"
+	fi
+}
diff --git a/lib/local.mk b/lib/local.mk
index 447d8b6..e058fa1 100644
--- a/lib/local.mk
+++ b/lib/local.mk
@@ -1,3 +1,4 @@
 pkgdata_sources = \
 	lib/output.sh \
-	lib/locale.sh
+	lib/locale.sh \
+	lib/cmd.sh