mmdebstrap: simplify interface of hook_main

1 files changed, 7 insertions, 6 deletions

diff --git a/mdbp/mmdebstrap.py b/mdbp/mmdebstrap.py
index 65a4856..37b6655 100644
--- a/mdbp/mmdebstrap.py
+++ b/mdbp/mmdebstrap.py
@@ -17,8 +17,8 @@ import typing
 
 import debian.debian_support
 
-from .common import buildjson, clean_dir, compute_env, download_dsc, \
-        get_dsc_files, json_load, parse_dsc, profile_option
+from .common import JsonObject, buildjson, clean_dir, compute_env, \
+        download_dsc, get_dsc_files, json_load, parse_dsc, profile_option
 
 libc = ctypes.CDLL(ctypes.util.find_library("c"))
 def unshare_network() -> None:
@@ -76,10 +76,8 @@ def build_subdir(dsc: debian.deb822.Dsc) -> str:
     assert ver is not None  # please mypy
     return "%s-%s" % (dsc["Source"], ver)
 
-def hook_main(buildjsonfilename: str, chrootname: str) -> None:
+def hook_main(build: JsonObject, chroot: pathlib.Path) -> None:
     """The entry point for the --hook-helper invocation run from mmdebstrap."""
-    build = json_load(pathlib.Path(buildjsonfilename).open("r"))
-    chroot = pathlib.Path(chrootname)
     builddir = pathlib.PurePath(build.get("build_path", "/build"))
     fullbuilddir = chroot / builddir.relative_to("/")
     if "source_package_path" in build["input"]:
@@ -171,7 +169,10 @@ class RawStoreAction(argparse.Action):
 def main() -> None:
     """Entry point for mdbp-mmdebstrap backend"""
     if len(sys.argv) == 4 and sys.argv[1] == "--hook-helper":
-        hook_main(sys.argv[2], sys.argv[3])
+        hook_main(
+            json_load(pathlib.Path(sys.argv[2]).open("r", encoding="utf8")),
+            pathlib.Path(sys.argv[3]),
+        )
         return
 
     parser = argparse.ArgumentParser()