pmb.parse.apkindex: Introduce proper typing

And adjust other code. See individual commits.

Closes #2455 (closed)

pmb/core/package_metadata.py

+# Copyright 2024 Stefan Hansson
+# SPDX-License-Identifier: GPL-3.0-or-later
+from dataclasses import dataclass
+from typing import Any
+
+import pmb.build._package
+from pmb.core.apkindex_block import ApkindexBlock
+from pmb.core.context import get_context
+
+
+@dataclass
+class PackageMetadata:
+    # This can't be list[Arch] because it can have values like "noarch" and "!armhf"
+    arch: list[str]
+    depends: list[str]
+    pkgname: str
+    provides: list[str]
+    version: str
+
+    @staticmethod
+    def from_apkindex_block(apkindex_block: ApkindexBlock) -> "PackageMetadata":
+        return PackageMetadata(
+            arch=[str(apkindex_block.arch)],
+            depends=apkindex_block.depends or [],
+            pkgname=apkindex_block.pkgname,
+            provides=apkindex_block.provides,
+            version=apkindex_block.version,
+        )
+
+    @staticmethod
+    def from_pmaport(pmaport: dict[str, Any]) -> "PackageMetadata":
+        pmaport_arches = pmaport["arch"]
+        pmaport_depends = pmb.build._package.get_depends(get_context(), pmaport)
+        pmaport_pkgname = pmaport["pkgname"]
+        pmaport_provides = pmaport["provides"]
+        pmaport_version = pmaport["pkgver"] + "-r" + pmaport["pkgrel"]
+
+        return PackageMetadata(
+            arch=pmaport_arches,
+            depends=pmaport_depends or [],
+            pkgname=pmaport_pkgname,
+            provides=pmaport_provides,
+            version=pmaport_version,
+        )