""" Input transformer that automatically quotes #s for e.g. nix. """

from xonsh.events import events

@events.on_transform_command
def _autoquote_for_nix(cmd):
	new_command = []

	# Process each word individually.
	words = cmd.strip().split(" ")
	for word in words:

		# If this is unquoted, and it has a comment in it without spaces,
		# consider it something that we should auto-quote.
		has_comment = '#' in word
		is_comment  = word.startswith("#")
		is_quoted   = ('"' in word) or ("'" in word)
		if has_comment and not is_comment and not is_quoted:
			word = '"' + word + '"'

		new_command.append(word)

	# Reconstruct our command.
	return " ".join(new_command) + "\n"