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# SPDX-FileCopyrightText: Peter Pentchev <roam@ringlet.net>
# SPDX-License-Identifier: GPL-2.0-or-later
"""Parse the human-readable output of `debsigs --list`."""
from __future__ import annotations
import typing
import pyparsing as pyp
from testsigs import defs
if typing.TYPE_CHECKING:
from typing import Final
_p_first = pyp.Literal("GPG signatures in ") + pyp.CharsNotIn("\n") + pyp.Char("\n")
_p_sig_type = pyp.Regex("[A-Za-z0-9_]+")
_p_hex = pyp.Word("0123456789ABCDEF")
_p_sig = (
_p_sig_type
+ pyp.Literal(": signed by ").suppress()
+ _p_hex
+ pyp.Literal(" on ").suppress()
+ pyp.CharsNotIn("\n").suppress()
+ pyp.Char("\n").suppress()
)
@_p_sig.set_parse_action
def _parse_sig(tokens: pyp.ParseResults) -> defs.DebSig:
"""Parse a signature line."""
match tokens.as_list():
case [sig_type, key_id] if isinstance(sig_type, str) and isinstance(key_id, str):
return defs.DebSig(sig_type=sig_type, key_id=key_id)
case _:
raise RuntimeError(repr(tokens))
_p_last = pyp.Literal(" *** NO ATTEMPT HAS BEEN MADE") + pyp.CharsNotIn("\n") + pyp.Char("\n")
_p_list = _p_first.suppress() + pyp.ZeroOrMore(_p_sig) + _p_last.suppress()
_p_list_complete = _p_list.leave_whitespace().parse_with_tabs()
def parse_list(output: str) -> list[defs.DebSig]:
"""Parse the output of `debsigs --list`, extract the info we care about."""
res: Final = _p_list_complete.parse_string(output, parse_all=True).as_list()
if not all(isinstance(sig, defs.DebSig) for sig in res):
raise RuntimeError(repr(res))
return res
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