Poetry add dependecy from requirements.text fails NoSuchOptionException The "-r" option does not exist - dependency-management

Question

I want to add poetry to the existing project
to add a dependency from requirements.txt I ran the following command
poetry add $( cat requirements.txt )
In either case, I get the same error - shown below
.venv) bash-3.2$ poetry add $( cat requirements.txt )
Stack trace:
11 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/console_application.py:123 in run
io = io_factory(
10 ~/.poetry/lib/poetry/console/config/application_config.py:221 in create_io
resolved_command = application.resolve_command(args)
9 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/console_application.py:110 in resolve_command
return self._config.command_resolver.resolve(args, self)
8 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/resolver/default_resolver.py:34 in resolve
return self.create_resolved_command(result)
7 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/resolver/default_resolver.py:166 in create_resolved_command
if not result.is_parsable():
6 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/resolver/resolve_result.py:43 in is_parsable
self._parse()
5 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/resolver/resolve_result.py:49 in _parse
self._parsed_args = self._command.parse(self._raw_args)
4 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/api/command/command.py:113 in parse
return self._config.args_parser.parse(args, self._args_format, lenient)
3 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/args/default_args_parser.py:53 in parse
self._parse(args, _fmt, lenient)
2 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/args/default_args_parser.py:103 in _parse
self._parse_short_option(token, tokens, fmt, lenient)
1 ~/.poetry/lib/poetry/_vendor/py3.8/clikit/args/default_args_parser.py:272 in _parse_short_option
self._add_short_option(name, None, tokens, fmt, lenient)
NoSuchOptionException
The "-r" option does not exist.
at ~/.poetry/lib/poetry/_vendor/py3.8/clikit/args/default_args_parser.py:349 in _add_short_option
345│ def _add_short_option(
346│ self, name, value, tokens, fmt, lenient
347│ ): # type: (str, Optional[str], List[str], ArgsFormat, bool) -> None
348│ if not fmt.has_option(name):
→ 349│ raise NoSuchOptionException(name)
350│
351│ self._add_long_option(
352│ fmt.get_option(name).long_name, value, tokens, fmt, lenient
353│ )
for reference here is my requirement.txt
# This file is autogenerated by pip-compile with python 3.8
# To update, run:
#
# pip-compile requirements.in
#
click==8.0.3
# via -r requirements.in
gevent==21.8.0
# via grequests
greenlet==1.1.2
# via gevent
grequests==0.6.0
# via -r requirements.in
idna==3.3
# via requests
iniconfig==1.1.1
# via pytest

Answer 1

Looks like It was reading comments in requirements.txt
simple just ignore the comments run the following
cat requirements.txt|grep -v '#'|xargs poetry add