Basic command interpreter

test/test-cmd

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+#!/bin/bash
+#
+# Tests command interpreter
+#
+#   Copyright (C) 2011 Mike Gerwitz
+#
+#   This file is part of gsgp. 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/>.
+##
+
+mypath=$( dirname $0 )
+. "$mypath/common"
+
+# MSG command should output the given message (consuming all arguments) to
+# stdout
+msg="This is a test message"
+assert-equal "$( cmd MSG $msg )" "$msg" || {
+    fail "Should properly output MSGs"
+}

util/cmd

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+#!/bin/bash
+#
+# Basic command interpreter
+#
+#   Copyright (C) 2011 Mike Gerwitz
+#
+#   This file is part of gsgp. 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/>.
+##
+
+# we accept the data as an argument list
+data="$@"
+
+# the command will be the first word and the remaining text will act as the
+# argument list
+cmd=$( cut -d' ' -f1 <<< "$data" )
+args=$( cut -sd' ' -f2- <<< "$data" )
+
+case "$cmd" in
+    MSG)
+        # the entire argument list represents the message
+        echo "$args"
+        ;;
+esac
+