Method detect_language

code_review_graph/parser.py:854–873

Map a file path to its language name. Extension-based lookup is tried first. For extension-less files (typical for Unix scripts like ``bin/myapp`` or ``.git/hooks/pre-commit``) we fall back to reading the first line for a shebang. Files that already have a known ex

(self, path: Path)

        return self._parsers[language]

    def detect_language(self, path: Path) -> Optional[str]:
        """Map a file path to its language name.

        Extension-based lookup is tried first.  For extension-less files
        (typical for Unix scripts like ``bin/myapp`` or ``.git/hooks/pre-commit``)
        we fall back to reading the first line for a shebang.  Files that
        already have a known extension are never re-read — shebang probing
        only runs when the extension lookup returns ``None`` **and** the path
        has no suffix at all.  See issue #237.
        """
        suffix = path.suffix.lower()
        lang = self._extension_map.get(suffix)
        if lang is not None:
            return lang
        # Only probe shebang for files without any extension — "README", "LICENSE",
        # and other extension-less text files also fall here, but the probe is a
        # cheap 256-byte read that returns None when no shebang is found.
        if suffix == "":
            return self._detect_language_from_shebang(path)
        return None

    @staticmethod
    def _detect_language_from_shebang(path: Path) -> Optional[str]: