Remove plugin type and register individual hook

Signed-off-by: Facundo Tuesca <facundo.tuesca@trailofbits.com>

src/pip_plugin_pep740/__init__.py

@@ -2,6 +2,6 @@
 
 __version__ = "0.0.1"
 
-from ._impl import plugin_type, pre_download, pre_extract
+from ._impl import pre_download, provided_hooks
 
-__all__ = ["plugin_type", "pre_extract", "pre_download"]
+__all__ = ["provided_hooks", "pre_download"]

src/pip_plugin_pep740/_impl.py

@@ -3,7 +3,6 @@
 from __future__ import annotations
 
 from json import JSONDecodeError
-from typing import TYPE_CHECKING, Literal
 
 import requests
 import rfc3986
@@ -16,11 +15,6 @@
 )
 from rfc3986 import builder
 
-if TYPE_CHECKING:
-    from pathlib import Path  # pragma: no cover
-
-PluginType = Literal["dist-inspector"]
-
 
 def _get_provenance_url(filename: str, index_host: str) -> str | None:
     if filename.endswith(".tar.gz"):
@@ -101,9 +95,9 @@ def _get_provenance(filename: str, url: str) -> Provenance | None:
         raise ValueError(msg) from e
 
 
-def plugin_type() -> PluginType:
-    """Return the plugin type."""
-    return "dist-inspector"
+def provided_hooks() -> list[str]:
+    """Return the hooks we want to register."""
+    return ["pre_download"]
 
 
 def pre_download(url: str, filename: str, digest: str) -> None:
@@ -125,8 +119,3 @@ def pre_download(url: str, filename: str, digest: str) -> None:
         msg = f"Provenance failed verification: {e}"
         raise ValueError(msg) from e
     return
-
-
-def pre_extract(dist: Path) -> None:  # noqa: ARG001
-    """Check before extraction."""
-    return

test/test_impl.py

@@ -32,7 +32,7 @@
 
 class TestPlugin:
     def test_plugin_type(self) -> None:
-        assert pip_plugin_pep740.plugin_type() == "dist-inspector"
+        assert pip_plugin_pep740.provided_hooks() == ["pre_download"]
 
     @pytest.mark.parametrize(
         ("filename", "provenance_file", "digest"),
@@ -254,6 +254,3 @@ def test_pre_download_malformed_provenance_valid_json(self) -> None:
                     filename=DIST_FILE_1.name,
                     digest=DIST_DIGEST_1,
                 )
-
-    def test_pre_extract(self) -> None:
-        assert pip_plugin_pep740.pre_extract(dist=Path("filename")) is None