0.0.2-alpha.4

scripts/audit_markdown_headers.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+# file: scripts/audit_markdown_headers.py
+# version: 1
+
+"""Validate path and positive revision in selected Markdown file headers."""
+
+from __future__ import annotations
+
+import argparse
+import pathlib
+import re
+import sys
+
+_IGNORED_DIRECTORIES = frozenset({".git", ".idea", ".venv", "__pycache__", "dist", "node_modules", "target", "builds"})
+_VERSION = re.compile(r"<!-- version: [1-9][0-9]* -->")
+
+
+def _selected_files(raw_paths: list[str], root: pathlib.Path) -> tuple[list[pathlib.Path], list[str]]:
+    files: set[pathlib.Path] = set()
+    errors: list[str] = []
+
+    for raw_path in raw_paths:
+        path = pathlib.Path(raw_path)
+        if path.is_dir() or path.is_file():
+            if not path.resolve().is_relative_to(root):
+                errors.append(f"Markdown header audit: path outside project root: {path}")
+                continue
+        if path.is_dir():
+            candidates = (
+                candidate
+                for candidate in path.rglob("*.md")
+                if candidate.is_file() and not any(part in _IGNORED_DIRECTORIES for part in candidate.parts)
+            )
+        elif path.is_file() and path.suffix.lower() == ".md":
+            candidates = iter((path,))
+        else:
+            errors.append(f"Markdown header audit: unsupported or missing path: {path}")
+            continue
+
+        for candidate in candidates:
+            canonical = candidate.resolve()
+            if not canonical.is_relative_to(root):
+                errors.append(f"Markdown header audit: path outside project root: {candidate}")
+            else:
+                files.add(canonical)
+
+    return sorted(files), errors
+
+
+def _audit_file(path: pathlib.Path, root: pathlib.Path) -> list[str]:
+    relative = path.relative_to(root).as_posix()
+    lines = path.read_text(encoding="utf-8").splitlines()
+    errors: list[str] = []
+    expected_file = f"<!-- file: {relative} -->"
+
+    if not lines or lines[0] != expected_file:
+        errors.append(f"{relative}:1: expected `{expected_file}`")
+    if len(lines) < 2 or _VERSION.fullmatch(lines[1]) is None:
+        errors.append(f"{relative}:2: expected positive `<!-- version: N -->`")
+    return errors
+
+
+def main() -> int:
+    """Run the read-only Markdown header audit from the project root."""
+
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("paths", nargs="+", help="Markdown files or directories to audit")
+    args = parser.parse_args()
+
+    root = pathlib.Path.cwd().resolve()
+    files, selection_errors = _selected_files(args.paths, root)
+    if selection_errors or not files:
+        for error in selection_errors or ["Markdown header audit: no Markdown files selected"]:
+            print(error, file=sys.stderr)
+        return 2
+
+    errors: list[str] = []
+    for path in files:
+        try:
+            errors.extend(_audit_file(path, root))
+        except (OSError, UnicodeError) as error:
+            print(f"Markdown header audit: cannot read {path}: {error}", file=sys.stderr)
+            return 2
+
+    for error in errors:
+        print(error, file=sys.stderr)
+    if errors:
+        print(f"Markdown header audit: {len(errors)} error(s) across {len(files)} file(s)", file=sys.stderr)
+        return 1
+
+    print(f"Markdown header audit: clean ({len(files)} file(s))")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())