def ParseCommand(self, line):
"""Parses the next command from line and returns a list of ArgTokens.
The parse stops at the first token that is not an ARG or FLAG. That token is
not consumed. The caller can examine the return value to determine the
parts of the line that were ignored and the remainder of the line that was
not lexed/parsed yet.
Args:
line: a string containing the current command line
Returns:
A list of ArgTokens.
"""
self.tokens = lexer.GetShellTokens(line)
self.cmd = self.root
self.positionals_seen = 0
self.args = []
unknown = False
while self.tokens:
token = self.tokens.pop(0)
value = token.UnquotedValue()
if token.lex == lexer.ShellTokenType.FLAG:
self.ParseFlag(token, value)
elif token.lex == lexer.ShellTokenType.ARG and not unknown:
if value in self.cmd[LOOKUP_COMMANDS]:
self.cmd = self.cmd[LOOKUP_COMMANDS][value]
if self.cmd[LOOKUP_IS_GROUP]:
token_type = ArgTokenType.GROUP
else:
token_type = ArgTokenType.COMMAND
self.args.append(
ArgToken(value, token_type, self.cmd, token.start,
token.end))
elif self.positionals_seen < len(self.cmd[LOOKUP_POSITIONALS]):
positional = self.cmd[LOOKUP_POSITIONALS][
self.positionals_seen]
self.args.append(
ArgToken(value, ArgTokenType.POSITIONAL, positional,
token.start, token.end))
if positional[LOOKUP_NARGS] not in ('*', '+'):
self.positionals_seen += 1
elif not value: # trailing space
break
else:
unknown = True
if self.cmd == self.root:
token_type = ArgTokenType.PREFIX
else:
token_type = ArgTokenType.UNKNOWN
self.args.append(
ArgToken(value, token_type, self.cmd, token.start,
token.end))
elif token.lex == lexer.ShellTokenType.TERMINATOR:
unknown = False
self.cmd = self.root
else:
unknown = True
self.args.append(
ArgToken(value, ArgTokenType.UNKNOWN, self.cmd,
token.start, token.end))
return self.args
def RunSubTest(self, s):
return lexer.GetShellTokens(s)