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import os
from .exceptions import ArgcompleteException
from .io import debug
from .packages import _shlex
def split_line(line, point=None):
if point is None:
point = len(line)
line = line[:point]
lexer = _shlex.shlex(line, posix=True)
lexer.whitespace_split = True
lexer.wordbreaks = os.environ.get("_ARGCOMPLETE_COMP_WORDBREAKS", "")
words = []
def split_word(word):
# TODO: make this less ugly
point_in_word = len(word) + point - lexer.instream.tell()
if isinstance(lexer.state, (str, bytes)) and lexer.state in lexer.whitespace:
point_in_word += 1
if point_in_word > len(word):
debug("In trailing whitespace")
words.append(word)
word = ""
prefix, suffix = word[:point_in_word], word[point_in_word:]
prequote = ""
# posix
if lexer.state is not None and lexer.state in lexer.quotes:
prequote = lexer.state
# non-posix
# if len(prefix) > 0 and prefix[0] in lexer.quotes:
# prequote, prefix = prefix[0], prefix[1:]
return prequote, prefix, suffix, words, lexer.last_wordbreak_pos
while True:
try:
word = lexer.get_token()
if word == lexer.eof:
# TODO: check if this is ever unsafe
# raise ArgcompleteException("Unexpected end of input")
return "", "", "", words, None
if lexer.instream.tell() >= point:
debug("word", word, "split, lexer state: '{s}'".format(s=lexer.state))
return split_word(word)
words.append(word)
except ValueError:
debug("word", lexer.token, "split (lexer stopped, state: '{s}')".format(s=lexer.state))
if lexer.instream.tell() >= point:
return split_word(lexer.token)
else:
msg = (
"Unexpected internal state. "
"Please report this bug at https://github.com/kislyuk/argcomplete/issues."
)
raise ArgcompleteException(msg)