fix: remaining import, type annotation, and xfail type issues (chunk 7)

- fixtures.py: add import capa.render.result_document; local import capa.loader in functions
- fixtures.py: fix xfail reason type annotation (None -> str = "")
- main.py: type: ignore for PyInstaller-injected sys._MEIPASS

capa/main.py

@@ -173,7 +173,7 @@ def get_default_root() -> Path:
         # its injected by pyinstaller.
         # so we'll fetch this attribute dynamically.
         assert hasattr(sys, "_MEIPASS")
-        return Path(sys._MEIPASS)
+        return Path(sys._MEIPASS)  # type: ignore[attr-defined]  # PyInstaller injects _MEIPASS at runtime
     else:
         return Path(__file__).resolve().parent.parent
 

tests/fixtures.py

@@ -25,6 +25,7 @@ import capa.features.file
 import capa.features.insn
 import capa.features.common
 import capa.features.basicblock
+import capa.render.result_document
 from capa.features.common import (
     OS,
     OS_ANY,
@@ -60,7 +61,7 @@ DNFILE_TESTFILES = DOTNET_DIR / "dnfile-testfiles"
 
 
 @contextlib.contextmanager
-def xfail(condition, reason=None):
+def xfail(condition, reason: str = ""):
     """
     context manager that wraps a block that is expected to fail in some cases.
     when it does fail (and is expected), then mark this as pytest.xfail.
@@ -101,6 +102,7 @@ def xfail(condition, reason=None):
 @lru_cache(maxsize=1)
 def get_viv_extractor(path: Path):
     import capa.main
+    import capa.loader
     import capa.features.extractors.viv.extractor
 
     sigpaths = [
@@ -307,6 +309,7 @@ def get_ghidra_extractor(path: Path):
     if not pyghidra.started():
         pyghidra.start()
 
+    import capa.loader
     import capa.features.extractors.ghidra.context
     import capa.features.extractors.ghidra.extractor