#!/usr/local/bin/cz --

Main()
	cstr l
	repeat
		l = Input()
		if !l
			break
		if l[0] == '#' || l[0] == '\0'
			continue

		cstr program = l
		l = strstr(l, "() {")
		if !l
			error("expected shell function: %s", l)
		*l = '\0'
		++l

		Say(program)

		if exists(program)
			cstr tilde = Format("%s~", program)
			if exists(tilde)
				error("tilde file %s exists already", tilde)
			Rename(program, tilde)
			Free(tilde)

		let(out, Fopen(program, "w"))

		if cstr_ends_with(l, "}")
			# single line

			l = strchr(l, '{') + 1
			while *l == ' '
				++l
			let(r, strrchr(l, ';'))
			if r == NULL
				error("missing ; in line %s", l)
			*r = '\0'
			Fprint(out, "exec ")
			Fsay(out, l)

		 eif cstr_ends_with(l, "{")
			# multi line

			Eachline(l)
				if strlen(l) == 1 && l[0] == '}'
					break
				if l[0] != '\t'
					error("function not indented: %s", l)
				Fsay(out, l+1)

		 else
			error("don't understand syntax: %s", l)

		Fclose(out)
		cx(program)

use io main cstr error util alloc