fix(detect): preserve explicit scan roots vs parent unanchored .gitignore (#2468)

graphify/detect.py

@@ -1189,7 +1189,14 @@ def _is_ignored(
             except ValueError:
                 continue  # target outside this pattern's anchor: cannot match
             if rel_anchor != ".":
-                matched = _matches(rel_anchor, p, path_relative=path_relative)
+                rel = rel_anchor
+                if not path_relative:
+                    try:
+                        if len(root.parts) > len(anchor.parts):
+                            rel = str(target.relative_to(root)).replace(os.sep, "/")
+                    except ValueError:
+                        pass
+                matched = _matches(rel, p, path_relative=path_relative)
                 if matched and directory_only and not target.is_dir():
                     matched = False
 

tests/test_detect.py

@@ -1209,6 +1209,64 @@ def test_anchored_multi_segment_pattern(tmp_path):
     )
 
 
+def test_detect_does_not_ignore_scan_root_itself_via_parent_gitignore(tmp_path):
+    """If a parent `.gitignore` (at the repo root) ignores the directory being scanned
+    (the scan root itself), files inside the scan root must not be ignored (#2468)."""
+    (tmp_path / ".git").mkdir()
+
+    corpus_dir = tmp_path / "graphify-corpus"
+    corpus_dir.mkdir()
+
+    (corpus_dir / "keep.py").write_text("x = 1\n", encoding="utf-8")
+    
+    docs_dir = corpus_dir / "docs"
+    docs_dir.mkdir()
+    (docs_dir / "intro.md").write_text("# Introduction\n", encoding="utf-8")
+
+    (tmp_path / ".gitignore").write_text("graphify-corpus/\n", encoding="utf-8")
+
+    result = detect(corpus_dir)
+
+    all_files = [Path(f) for files in result["files"].values() for f in files]
+    file_names = {f.name for f in all_files}
+
+    assert result["total_files"] == 2
+    assert "keep.py" in file_names
+    assert "intro.md" in file_names
+
+
+def test_detect_preserves_unrelated_parent_ignores_inside_scan_root(tmp_path):
+    """A parent `.gitignore` should still ignore unrelated directories (like `node_modules/`)
+    inside the scan root, even while the scan root itself is not ignored (#2468)."""
+    (tmp_path / ".git").mkdir()
+
+    corpus_dir = tmp_path / "graphify-corpus"
+    corpus_dir.mkdir()
+
+    (corpus_dir / "keep.py").write_text("x = 1\n", encoding="utf-8")
+    
+    docs_dir = corpus_dir / "docs"
+    docs_dir.mkdir()
+    (docs_dir / "intro.md").write_text("# Introduction\n", encoding="utf-8")
+
+    node_modules_dir = corpus_dir / "node_modules"
+    node_modules_dir.mkdir()
+    (node_modules_dir / "lib.js").write_text("console.log(1);\n", encoding="utf-8")
+
+    # Parent .gitignore ignoring the scan root itself AND node_modules/
+    (tmp_path / ".gitignore").write_text("graphify-corpus/\nnode_modules/\n", encoding="utf-8")
+
+    result = detect(corpus_dir)
+
+    all_files = [Path(f) for files in result["files"].values() for f in files]
+    file_names = {f.name for f in all_files}
+
+    assert result["total_files"] == 2
+    assert "keep.py" in file_names
+    assert "intro.md" in file_names
+    assert "lib.js" not in file_names
+
+
 # Tests for #1235 - memoise _is_ignored/_eval results via a per-detect() cache
 
 def test_is_ignored_cache_matches_uncached_results(tmp_path):