Method __post_init__

Lib/_pyrepl/terminfo.py:326–355

Initialize terminal capabilities for the given terminal type. Based on ncurses implementation in: - ncurses/tinfo/lib_setup.c:setupterm() and _nc_setupterm() - ncurses/tinfo/lib_setup.c:TINFO_SETUP_TERM() This version first attempts to read terminfo database files l

(self)

    _capabilities: dict[str, bytes] = field(default_factory=dict)

    def __post_init__(self) -> None:
        """Initialize terminal capabilities for the given terminal type.

        Based on ncurses implementation in:
        - ncurses/tinfo/lib_setup.c:setupterm() and _nc_setupterm()
        - ncurses/tinfo/lib_setup.c:TINFO_SETUP_TERM()

        This version first attempts to read terminfo database files like ncurses,
        then, if `fallback` is True, falls back to hardcoded capabilities for
        common terminal types.
        """
        # If termstr is None or empty, try to get from environment
        if not self.terminal_name:
            self.terminal_name = os.environ.get("TERM") or "ANSI"

        if isinstance(self.terminal_name, bytes):
            self.terminal_name = self.terminal_name.decode("ascii")

        try:
            self._parse_terminfo_file(self.terminal_name)
        except (OSError, ValueError):
            if not self.fallback:
                raise

            term_type = _TERM_ALIASES.get(
                self.terminal_name, self.terminal_name
            )
            if term_type not in _TERMINAL_CAPABILITIES:
                term_type = "dumb"
            self._capabilities = _TERMINAL_CAPABILITIES[term_type].copy()

    def _parse_terminfo_file(self, terminal_name: str) -> None:
        """Parse a terminfo file.