Makefile to determine Shell subgrammars

Makefile

RULES = \
	complete_command \
	list \
	and_or \
	pipeline \
	pipe_sequence \
	command \
	compound_command \
	compound_list \
	term \
	for_clause \
	do_group \
	case_clause \
	case_list_ns \
	case_list \
	case_item_ns \
	case_item \
	if_clause \
	else_part \
	function_body \
	simple_command \
	cmd_prefix \
	cmd_suffix \
	redirect_list \
	io_redirect \
	linebreak \
	separator \
	sequential_sep \
	io_file \
	io_here \
	newline_list \
	separator_op \
	pattern \
	wordlist

all:
	for rule in $(RULES); do \
		mkdir -p $$rule && \
		cd $$rule && \
		$(MAKE) -f ../Makefile $$rule && \
		cd - && \
		printf 'Result: %s includes %s rules\n' $$rule \
			`ls $$rule | wc -l` || \
		break; \
	done

clean:
	rm -fr $(RULES)

$(RULES):
	touch $@

complete_command: list separator

list: separator_op and_or

and_or: pipeline linebreak

pipeline: pipe_sequence

pipe_sequence: command linebreak

command: simple_command compound_command redirect_list \
	linebreak function_body

compound_command: compound_list for_clause case_clause \
	if_clause do_group

compound_list: term newline_list separator

term: separator and_or

for_clause: linebreak do_group sequential_sep wordlist

do_group: compound_list

case_clause: linebreak case_list case_list_ns

case_list_ns: case_list case_item_ns

case_list: case_item

case_item_ns: pattern linebreak compound_list

case_item: pattern linebreak compound_list

if_clause: compound_list else_part

else_part: compound_list

function_body: compound_command redirect_list

simple_command: cmd_prefix cmd_suffix

cmd_prefix cmd_suffix redirect_list: io_redirect

io_redirect: io_file io_here

linebreak: newline_list

separator: separator_op linebreak newline_list

sequential_sep: linebreak newline_list

io_file io_here newline_list separator_op pattern wordlist: