emacsterm: sane option parsing; create emacsterm-{xterm,rxvt} for insanity

1 files changed, 100 insertions, 0 deletions

diff --git a/emacsterm-rxvt.sh.in b/emacsterm-rxvt.sh.in
new file mode 100644
index 0000000..8b3d3ef
--- /dev/null
+++ b/emacsterm-rxvt.sh.in
@@ -0,0 +1,100 @@
+#!@bash@
+
+# Copyright (C) 2011, 2013-2014, 2016 Luke Shumaker <lukeshu@sbcglobal.net>
+#
+# This file is not considered part of GNU Emacs.
+#
+# 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/>.
+
+m4_include(common.sh.in)
+
+usage() {
+	print "Usage: %q [OPTIONS] [-e PROGRAM [ARGS...]]" "$0"
+	print 'A wrapper around emacsterm that behaves like rxvt'
+	echo
+	print 'The "-e" option cannot be combined with other short options.'
+	echo
+	print 'If the "-e" option is not given, then "${SHELL:-/bin/sh}" is used.'
+	echo
+	print 'The following OPTIONS are accepted:'
+	emacs_usage
+	flag "-T $(_ FUNCTION)" 'Use Emacs Lisp FUNCTION instead of "term"'
+	flag "-e $(_ 'PROGRAM [ARGS...]')" 'Specify the command to execute'
+	echo
+	print 'Bugs:'
+	print \
+'The string "-e" cannot be used as an argument to flags that take
+arguments.'
+}
+
+
+main() {
+	# Run through and check for the -e flag
+	declare e=false
+	declare -a arg_ary=("$@")
+	declare -i i=0
+	while [[ $i -lt ${#arg_ary[@]} ]]; do
+		case "${arg_ary[$i]}" in
+			'-e') e=true; arg_ary[$i]='--'; break;;
+			'--') error 'bad command line option "--"'; next error; return $?;;
+		esac
+		i+=1
+	done
+
+	declare -a flags=()
+	declare -a prog=()
+	declare mode=normal
+
+	emacs_getopt_init
+	declare args
+	if ! args="$(emacs_getopt T: '' "${arg_ary[@]}")"; then
+		mode=error
+	else
+		# Pretty much identical option parsing to emacsterm
+		eval set -- "$args"
+		while true; do
+			case "$1" in
+				-V|--version) shift; mode=version;;
+				-H|--help) shift; mode=usage;;
+				-T) flags+=("$1" "$2"); shift 2;;
+				--) shift; break;;
+				*)
+					if [[ $1 =~ $emacs_getopt_2 ]]; then
+						flags+=("$1" "$2"); shift 2
+					else
+						flags+=("$1"); shift 1
+					fi
+					;;
+			esac
+		done
+
+		# Now for the rxvt weirdness
+		if ! $e; then
+			case $# in
+				0) prog=("${SHELL:-/bin/sh}");;
+				*) error 'Extra arguments: %s' "$*"; mode=error;;
+			esac
+		else
+			case $# in
+				0) getopt -Q -n "$0" e: -e; mode=error;;
+				*) prog=("$@");;
+			esac
+		fi
+	fi
+
+	next "$mode" \
+	     emacsterm "${flags[@]}" -- "${prog[@]}"
+}
+
+main "$@"