laster 0.0.2

agent/app/core/installer.py

@@ -5,10 +5,49 @@ from pathlib import Path
 from app.core.command_runner import CommandRunner
 
 
+def _parse_deb_control_output(output: str) -> dict[str, str]:
+    metadata: dict[str, str] = {}
+
+    for line in output.splitlines():
+        key, separator, value = line.partition(":")
+        if not separator:
+            continue
+
+        normalized_key = key.strip().lower()
+        if normalized_key in {"package", "version", "architecture"}:
+            metadata[normalized_key] = value.strip()
+
+    return metadata
+
+
 class DebInstaller:
     def __init__(self, command_runner: CommandRunner) -> None:
         self.command_runner = command_runner
 
+    def get_deb_metadata(self, file_path: Path) -> dict[str, str]:
+        result = self.command_runner.run([
+            "dpkg-deb",
+            "-f",
+            str(file_path),
+            "Package",
+            "Version",
+            "Architecture",
+        ])
+        metadata = _parse_deb_control_output(result.stdout)
+        missing_fields = [
+            field
+            for field in ("package", "version", "architecture")
+            if not metadata.get(field)
+        ]
+
+        if missing_fields:
+            raise ValueError(
+                "Downloaded .deb is missing metadata fields: "
+                f"{', '.join(missing_fields)}"
+            )
+
+        return metadata
+
     def install_deb(self, file_path: Path) -> None:
         self.command_runner.run(["apt", "install", "-y", str(file_path)])
 
@@ -27,4 +66,3 @@ class DebInstaller:
             return True
         except Exception:
             return False
-