cmds.distro.pkg.CmdMeta: Add class

Support distro pkg meta <package names ...>, returning meta
information for the specified package names.

Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/cmds/distro/backend/BePkg.py

@@ -1,11 +1,11 @@
 # -*- coding: utf-8 -*-
 
 from __future__ import annotations
-from typing import TYPE_CHECKING
+from typing import Iterable, TYPE_CHECKING
 
 import abc
-from typing import Iterable
 
+from ..lib.Package import Package
 from .Backend import Backend as Base
 
 if TYPE_CHECKING:
@@ -16,9 +16,16 @@ class BePkg(Base):
     def __init__(self, parent: Parent):
         super().__init__(parent)
 
-    async def list_files(self, name: str) -> Iterable[str]:
-        return await self._list_files(name)
+    async def files(self, name: str) -> Iterable[str]:
+        return await self._files(name)
 
     @abc.abstractmethod
-    async def _list_files(self, name: str) -> Iterable[str]:
+    async def _files(self, name: str) -> Iterable[str]:
+        pass
+
+    async def meta_data(self, names: Iterable[str]) -> Iterable[Package]:
+        return await self._meta_data(names)
+
+    @abc.abstractmethod
+    async def _meta_data(self, names: Iterable[str]) -> Iterable[Package]:
         pass

src/python/jw/pkg/cmds/distro/backend/debian/Pkg.py

@@ -4,7 +4,7 @@ from typing import Iterable
 from argparse import Namespace
 
 from ...lib.Package import Package
-from ...lib.dpkg import list_files
+from ...lib.dpkg import list_files, query_packages
 from ...Cmd import Cmd
 from ..BePkg import BePkg as Base
 
@@ -13,5 +13,8 @@ class Pkg(Base):
     def __init__(self, parent: Cmd):
         super().__init__(parent)
 
-    async def _list_files(self, name: str) -> Iterable[Package]:
+    async def _files(self, name: str) -> Iterable[str]:
         return await list_files(name)
+
+    async def _meta_data(self, names: Iterable[str]) -> Iterable[Package]:
+        return await query_packages(names)

src/python/jw/pkg/cmds/distro/backend/suse/Pkg.py

@@ -4,7 +4,7 @@ from typing import Iterable
 from argparse import Namespace
 
 from ...lib.Package import Package
-from ...lib.rpm import list_files
+from ...lib.rpm import list_files, query_packages
 from ...Cmd import Cmd
 from ..BePkg import BePkg as Base
 
@@ -13,5 +13,8 @@ class Pkg(Base):
     def __init__(self, parent: Cmd):
         super().__init__(parent)
 
-    async def _list_files(self, name: str) -> Iterable[Package]:
+    async def _files(self, name: str) -> Iterable[str]:
         return await list_files(name)
+
+    async def _meta_data(self, names: Iterable[str]) -> Iterable[Package]:
+        return await query_packages(names)

src/python/jw/pkg/cmds/distro/pkg/CmdMeta.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace, ArgumentParser
+
+from .Cmd import Cmd
+from ..CmdPkg import CmdPkg
+
+class CmdMeta(Cmd): # export
+
+    def __init__(self, parent: CmdPkg) -> None:
+        super().__init__(parent, 'meta', help="List package metadata")
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+
+    async def _run(self, args: Namespace) -> None:
+        for name in args.names:
+            packages = await self._backend.meta_data([name])
+            if packages:
+                assert len(packages) == 1
+                if len(args.names) > 1:
+                    print(f'-- {name}')
+                print(packages[0])