Respect nested .gitignore rules when mining project files

mempalace/cli.py

@@ -65,6 +65,9 @@ def cmd_init(args):
 
 def cmd_mine(args):
     palace_path = os.path.expanduser(args.palace) if args.palace else MempalaceConfig().palace_path
+    include_ignored = []
+    for raw in args.include_ignored or []:
+        include_ignored.extend(part.strip() for part in raw.split(",") if part.strip())
 
     if args.mode == "convos":
         from .convo_miner import mine_convos
@@ -88,6 +91,8 @@ def cmd_mine(args):
             agent=args.agent,
             limit=args.limit,
             dry_run=args.dry_run,
+            respect_gitignore=not args.no_gitignore,
+            include_ignored=include_ignored,
         )
 
 
@@ -288,6 +293,17 @@ def main():
         help="Ingest mode: 'projects' for code/docs (default), 'convos' for chat exports",
     )
     p_mine.add_argument("--wing", default=None, help="Wing name (default: directory name)")
+    p_mine.add_argument(
+        "--no-gitignore",
+        action="store_true",
+        help="Don't respect .gitignore files when scanning project files",
+    )
+    p_mine.add_argument(
+        "--include-ignored",
+        action="append",
+        default=[],
+        help="Always scan these project-relative paths even if ignored; repeat or pass comma-separated paths",
+    )
     p_mine.add_argument(
         "--agent",
         default="mempalace",

mempalace/miner.py

@@ -10,6 +10,7 @@
 import os
 import sys
 import hashlib
+import fnmatch
 from pathlib import Path
 from datetime import datetime
 from collections import defaultdict
@@ -51,13 +52,224 @@
     ".next",
     "coverage",
     ".mempalace",
+    ".ruff_cache",
+    ".mypy_cache",
+    ".pytest_cache",
+    ".cache",
+    ".tox",
+    ".nox",
+    ".idea",
+    ".vscode",
+    ".ipynb_checkpoints",
+    ".eggs",
+    "htmlcov",
+    "target",
+}
+
+SKIP_FILENAMES = {
+    "mempalace.yaml",
+    "mempalace.yml",
+    "mempal.yaml",
+    "mempal.yml",
+    ".gitignore",
+    "package-lock.json",
 }
 
 CHUNK_SIZE = 800  # chars per drawer
 CHUNK_OVERLAP = 100  # overlap between chunks
 MIN_CHUNK_SIZE = 50  # skip tiny chunks
 
 
+# =============================================================================
+# IGNORE MATCHING
+# =============================================================================
+
+
+class GitignoreMatcher:
+    """Lightweight matcher for one directory's .gitignore patterns."""
+
+    def __init__(self, base_dir: Path, rules: list):
+        self.base_dir = base_dir
+        self.rules = rules
+
+    @classmethod
+    def from_dir(cls, dir_path: Path):
+        gitignore_path = dir_path / ".gitignore"
+        if not gitignore_path.is_file():
+            return None
+
+        try:
+            lines = gitignore_path.read_text(encoding="utf-8", errors="replace").splitlines()
+        except Exception:
+            return None
+
+        rules = []
+        for raw_line in lines:
+            line = raw_line.strip()
+            if not line:
+                continue
+
+            if line.startswith("\\#") or line.startswith("\\!"):
+                line = line[1:]
+            elif line.startswith("#"):
+                continue
+
+            negated = line.startswith("!")
+            if negated:
+                line = line[1:]
+
+            anchored = line.startswith("/")
+            if anchored:
+                line = line.lstrip("/")
+
+            dir_only = line.endswith("/")
+            if dir_only:
+                line = line.rstrip("/")
+
+            if not line:
+                continue
+
+            rules.append(
+                {
+                    "pattern": line,
+                    "anchored": anchored,
+                    "dir_only": dir_only,
+                    "negated": negated,
+                }
+            )
+
+        if not rules:
+            return None
+
+        return cls(dir_path, rules)
+
+    def matches(self, path: Path, is_dir: bool = None):
+        try:
+            relative = path.relative_to(self.base_dir).as_posix().strip("/")
+        except ValueError:
+            return None
+
+        if not relative:
+            return None
+
+        if is_dir is None:
+            is_dir = path.is_dir()
+
+        ignored = None
+        for rule in self.rules:
+            if self._rule_matches(rule, relative, is_dir):
+                ignored = not rule["negated"]
+        return ignored
+
+    def _rule_matches(self, rule: dict, relative: str, is_dir: bool) -> bool:
+        pattern = rule["pattern"]
+        parts = relative.split("/")
+        pattern_parts = pattern.split("/")
+
+        if rule["dir_only"]:
+            target_parts = parts if is_dir else parts[:-1]
+            if not target_parts:
+                return False
+            if rule["anchored"] or len(pattern_parts) > 1:
+                return self._match_from_root(target_parts, pattern_parts)
+            return any(fnmatch.fnmatch(part, pattern) for part in target_parts)
+
+        if rule["anchored"] or len(pattern_parts) > 1:
+            return self._match_from_root(parts, pattern_parts)
+
+        return any(fnmatch.fnmatch(part, pattern) for part in parts)
+
+    def _match_from_root(self, target_parts: list, pattern_parts: list) -> bool:
+        def matches(path_index: int, pattern_index: int) -> bool:
+            if pattern_index == len(pattern_parts):
+                return True
+
+            if path_index == len(target_parts):
+                return all(part == "**" for part in pattern_parts[pattern_index:])
+
+            pattern_part = pattern_parts[pattern_index]
+            if pattern_part == "**":
+                return matches(path_index, pattern_index + 1) or matches(
+                    path_index + 1, pattern_index
+                )
+
+            if not fnmatch.fnmatch(target_parts[path_index], pattern_part):
+                return False
+
+            return matches(path_index + 1, pattern_index + 1)
+
+        return matches(0, 0)
+
+
+def load_gitignore_matcher(dir_path: Path, cache: dict):
+    """Load and cache one directory's .gitignore matcher."""
+    if dir_path not in cache:
+        cache[dir_path] = GitignoreMatcher.from_dir(dir_path)
+    return cache[dir_path]
+
+
+def is_gitignored(path: Path, matchers: list, is_dir: bool = False) -> bool:
+    """Apply active .gitignore matchers in ancestor order; last match wins."""
+    ignored = False
+    for matcher in matchers:
+        decision = matcher.matches(path, is_dir=is_dir)
+        if decision is not None:
+            ignored = decision
+    return ignored
+
+
+def should_skip_dir(dirname: str) -> bool:
+    """Skip known generated/cache directories before gitignore matching."""
+    return dirname in SKIP_DIRS or dirname.endswith(".egg-info")
+
+
+def normalize_include_paths(include_ignored: list) -> set:
+    """Normalize comma-parsed include paths into project-relative POSIX strings."""
+    normalized = set()
+    for raw_path in include_ignored or []:
+        candidate = str(raw_path).strip().strip("/")
+        if candidate:
+            normalized.add(Path(candidate).as_posix())
+    return normalized
+
+
+def is_exact_force_include(path: Path, project_path: Path, include_paths: set) -> bool:
+    """Return True when a path exactly matches an explicit include override."""
+    if not include_paths:
+        return False
+
+    try:
+        relative = path.relative_to(project_path).as_posix().strip("/")
+    except ValueError:
+        return False
+
+    return relative in include_paths
+
+
+def is_force_included(path: Path, project_path: Path, include_paths: set) -> bool:
+    """Return True when a path or one of its ancestors/descendants was explicitly included."""
+    if not include_paths:
+        return False
+
+    try:
+        relative = path.relative_to(project_path).as_posix().strip("/")
+    except ValueError:
+        return False
+
+    if not relative:
+        return False
+
+    for include_path in include_paths:
+        if relative == include_path:
+            return True
+        if relative.startswith(f"{include_path}/"):
+            return True
+        if include_path.startswith(f"{relative}/"):
+            return True
+
+    return False
+
+
 # =============================================================================
 # CONFIG
 # =============================================================================
@@ -284,26 +496,58 @@ def process_file(
 # =============================================================================
 
 
-def scan_project(project_dir: str) -> list:
+def scan_project(
+    project_dir: str,
+    respect_gitignore: bool = True,
+    include_ignored: list = None,
+) -> list:
     """Return list of all readable file paths."""
     project_path = Path(project_dir).expanduser().resolve()
     files = []
+    active_matchers = []
+    matcher_cache = {}
+    include_paths = normalize_include_paths(include_ignored)
+
     for root, dirs, filenames in os.walk(project_path):
-        dirs[:] = [d for d in dirs if d not in SKIP_DIRS]
+        root_path = Path(root)
+
+        if respect_gitignore:
+            active_matchers = [
+                matcher
+                for matcher in active_matchers
+                if root_path == matcher.base_dir or matcher.base_dir in root_path.parents
+            ]
+            current_matcher = load_gitignore_matcher(root_path, matcher_cache)
+            if current_matcher is not None:
+                active_matchers.append(current_matcher)
+
+        dirs[:] = [
+            d
+            for d in dirs
+            if is_force_included(root_path / d, project_path, include_paths)
+            or not should_skip_dir(d)
+        ]
+        if respect_gitignore and active_matchers:
+            dirs[:] = [
+                d
+                for d in dirs
+                if is_force_included(root_path / d, project_path, include_paths)
+                or not is_gitignored(root_path / d, active_matchers, is_dir=True)
+            ]
+
         for filename in filenames:
-            filepath = Path(root) / filename
-            if filepath.suffix.lower() in READABLE_EXTENSIONS:
-                # Skip config files
-                if filename in (
-                    "mempalace.yaml",
-                    "mempalace.yml",
-                    "mempal.yaml",
-                    "mempal.yml",
-                    ".gitignore",
-                    "package-lock.json",
-                ):
+            filepath = root_path / filename
+            force_include = is_force_included(filepath, project_path, include_paths)
+            exact_force_include = is_exact_force_include(filepath, project_path, include_paths)
+
+            if not force_include and filename in SKIP_FILENAMES:
+                continue
+            if filepath.suffix.lower() not in READABLE_EXTENSIONS and not exact_force_include:
+                continue
+            if respect_gitignore and active_matchers and not force_include:
+                if is_gitignored(filepath, active_matchers, is_dir=False):
                     continue
-                files.append(filepath)
+            files.append(filepath)
     return files
 
 
@@ -319,6 +563,8 @@ def mine(
     agent: str = "mempalace",
     limit: int = 0,
     dry_run: bool = False,
+    respect_gitignore: bool = True,
+    include_ignored: list = None,
 ):
     """Mine a project directory into the palace."""
 
@@ -328,7 +574,11 @@ def mine(
     wing = wing_override or config["wing"]
     rooms = config.get("rooms", [{"name": "general", "description": "All project files"}])
 
-    files = scan_project(project_dir)
+    files = scan_project(
+        project_dir,
+        respect_gitignore=respect_gitignore,
+        include_ignored=include_ignored,
+    )
     if limit > 0:
         files = files[:limit]
 
@@ -341,6 +591,10 @@ def mine(
     print(f"  Palace:  {palace_path}")
     if dry_run:
         print("  DRY RUN — nothing will be filed")
+    if not respect_gitignore:
+        print("  .gitignore: DISABLED")
+    if include_ignored:
+        print(f"  Include: {', '.join(sorted(normalize_include_paths(include_ignored)))}")
     print(f"{'─' * 55}\n")
 
     if not dry_run: