facts: add podman system info and ps facts

Author: bauen1

pyinfra/facts/podman.py

@@ -0,0 +1,47 @@
+from __future__ import annotations
+
+import json
+from typing import Any, Dict, Iterable, List, TypeVar
+
+from pyinfra.api import FactBase
+
+T = TypeVar("T")
+
+
+class PodmanFactBase(FactBase[T]):
+    """
+    Base for facts using `podman` to retrieve
+    """
+
+    abstract = True
+
+    def requires_command(self, *args, **kwargs) -> str:
+        return "podman"
+
+
+class PodmanSystemInfo(PodmanFactBase[Dict[str, Any]]):
+    """
+    Output of 'podman system info'
+    """
+
+    def command(self) -> str:
+        return "podman system info --format=json"
+
+    def process(self, output: Iterable[str]) -> Dict[str, Any]:
+        output = json.loads(("").join(output))
+        assert isinstance(output, dict)
+        return output
+
+
+class PodmanPs(PodmanFactBase[List[Dict[str, Any]]]):
+    """
+    Output of 'podman ps'
+    """
+
+    def command(self) -> str:
+        return "podman ps --format=json --all"
+
+    def process(self, output: Iterable[str]) -> List[Dict[str, Any]]:
+        output = json.loads(("").join(output))
+        assert isinstance(output, list)
+        return output  # type: ignore