Function _load_graphifyignore

graphify/detect.py:752–794

Read .graphifyignore files and return (anchor_dir, pattern) pairs. Patterns are returned outer-first so that inner (closer) rules are appended last and win via last-match-wins semantics — matching gitignore behavior exactly. Walk ceiling: the nearest VCS root if inside a repo, othe

(root: Path)

def _load_graphifyignore(root: Path) -> list[tuple[Path, str]]:
    """Read .graphifyignore files and return (anchor_dir, pattern) pairs.

    Patterns are returned outer-first so that inner (closer) rules are
    appended last and win via last-match-wins semantics — matching gitignore
    behavior exactly.

    Walk ceiling: the nearest VCS root if inside a repo, otherwise the scan
    root itself (hermetic — no leakage across unrelated sibling projects).
    """
    root = root.resolve()
    ceiling = _find_vcs_root(root) or root

    # Collect ancestor dirs from ceiling down to root (outer → inner)
    dirs: list[Path] = []
    current = root
    while True:
        dirs.append(current)
        if current == ceiling:
            break
        current = current.parent
    dirs.reverse()  # ceiling first, scan root last

    patterns: list[tuple[Path, str]] = []
    for d in dirs:
        # Merge .gitignore and .graphifyignore for this dir (#1363). Previously
        # the presence of a .graphifyignore made graphify skip that dir's
        # .gitignore entirely, so a file excluded only by .gitignore (e.g. a
        # neutrally-named secret like prod-dump.sql) silently got indexed into
        # the graph — whose artifacts embed file contents and are often
        # committed. .gitignore is read first and .graphifyignore last, so
        # .graphifyignore patterns (including `!` negations) win on conflict via
        # last-match-wins; adding a .graphifyignore can only ever exclude MORE,
        # never re-include a .gitignore-excluded file (#945 kept: a project with
        # only a .gitignore still gets sensible defaults).
        for fname in (".gitignore", ".graphifyignore"):
            ignore_file = d / fname
            if ignore_file.exists():
                for raw in ignore_file.read_text(encoding="utf-8", errors="ignore").splitlines():
                    line = _parse_gitignore_line(raw)
                    if line:
                        patterns.append((d, line))
    return patterns


def _is_ignored(