Fix #666: Probe submodules for python package imports

packages/core/src/repowise/core/ingestion/graph/builder.py

@@ -342,6 +342,10 @@ def build(self, progress: Any | None = None) -> nx.DiGraph:
                     from ..resolvers.cpp import resolve_cpp_import_all
 
                     targets = resolve_cpp_import_all(imp.module_path, path, ctx)
+                elif _lang == "python":
+                    from ..resolvers.python import resolve_python_import_all
+
+                    targets = resolve_python_import_all(imp, path, ctx)
                 else:
                     single = resolve_import(imp.module_path, path, _lang, ctx)
                     targets = (single,) if single else ()

packages/core/src/repowise/core/ingestion/resolvers/python.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 from pathlib import Path
+from typing import Any
 
 from ..languages.python_modules import build_python_module_index
 from .context import ResolverContext
@@ -67,6 +68,24 @@ def resolve_python_import(module_path: str, importer_path: str, ctx: ResolverCon
         if c in ctx.path_set:
             return c
 
-    # Stem-only fallback
+# Stem-only fallback
     stem = module_path.split(".")[-1].lower()
     return ctx.stem_lookup(stem)
+
+
+def resolve_python_import_all(imp: Any, importer_path: str, ctx: ResolverContext) -> tuple[str, ...]:
+    """Resolve a Python import, additionally probing submodules for package imports."""
+    targets = []
+    base = resolve_python_import(imp.module_path, importer_path, ctx)
+    if base:
+        targets.append(base)
+        if base.endswith("__init__.py"):
+            base_dir = Path(base).parent.as_posix()
+            for name in (imp.imported_names or []):
+                c1 = f"{base_dir}/{name}.py"
+                c2 = f"{base_dir}/{name}/__init__.py"
+                if c1 in ctx.path_set:
+                    targets.append(c1)
+                elif c2 in ctx.path_set:
+                    targets.append(c2)
+    return tuple(targets)

tests/unit/ingestion/test_python_resolver.py

@@ -0,0 +1,52 @@
+import pytest
+from repowise.core.ingestion.models import Import
+from repowise.core.ingestion.resolvers.context import ResolverContext
+from repowise.core.ingestion.resolvers.python import resolve_python_import, resolve_python_import_all
+
+
+def test_resolve_python_import_all_submodules():
+    path_set = {
+        "src/app.py",
+        "src/routers/__init__.py",
+        "src/routers/workspace.py",
+        "src/routers/git/__init__.py",
+    }
+
+    ctx = ResolverContext(path_set=path_set, stem_map={}, graph=None)
+
+    # 1. Single submodule without __init__.py package
+    imp = Import(
+        module_path="routers",
+        module_type="python",
+        imported_names=("workspace", "git", "overview"),
+        range_start=0,
+        range_end=0,
+        is_type_only=False,
+    )
+
+    targets = resolve_python_import_all(imp, "src/app.py", ctx)
+    assert "src/routers/__init__.py" in targets
+    assert "src/routers/workspace.py" in targets
+    assert "src/routers/git/__init__.py" in targets
+    assert len(targets) == 3
+
+
+def test_resolve_python_import_all_no_submodules():
+    path_set = {
+        "src/app.py",
+        "src/routers/__init__.py",
+    }
+
+    ctx = ResolverContext(path_set=path_set, stem_map={}, graph=None)
+
+    imp = Import(
+        module_path="routers",
+        module_type="python",
+        imported_names=("missing",),
+        range_start=0,
+        range_end=0,
+        is_type_only=False,
+    )
+
+    targets = resolve_python_import_all(imp, "src/app.py", ctx)
+    assert targets == ("src/routers/__init__.py",)