MLIA-649 Support tosa-checker as a backend

- Add new type of the backend based on python packages
- Add installation class for TOSA checker
- Update documentation
- Extend support of the parameter "force" in the
  "install" command

Change-Id: I95567b75e1cfe85daa1f1c3d359975bb67b2504e

1 files changed, 62 insertions, 0 deletions

diff --git a/src/mlia/utils/py_manager.py b/src/mlia/utils/py_manager.py
new file mode 100644
index 0000000..5f98fcc
--- /dev/null
+++ b/src/mlia/utils/py_manager.py
@@ -0,0 +1,62 @@
+# SPDX-FileCopyrightText: Copyright 2022, Arm Limited and/or its affiliates.
+# SPDX-License-Identifier: Apache-2.0
+"""Util functions for managing python packages."""
+from __future__ import annotations
+
+import sys
+from importlib.metadata import distribution
+from importlib.metadata import PackageNotFoundError
+from subprocess import check_call  # nosec
+
+
+class PyPackageManager:
+    """Python package manager."""
+
+    @staticmethod
+    def package_installed(pkg_name: str) -> bool:
+        """Return true if package installed."""
+        try:
+            distribution(pkg_name)
+        except PackageNotFoundError:
+            return False
+
+        return True
+
+    def packages_installed(self, pkg_names: list[str]) -> bool:
+        """Return true if all provided packages installed."""
+        return all(self.package_installed(pkg) for pkg in pkg_names)
+
+    def install(self, pkg_names: list[str]) -> None:
+        """Install provided packages."""
+        if not pkg_names:
+            raise ValueError("No package names provided")
+
+        self._execute_pip_cmd("install", pkg_names)
+
+    def uninstall(self, pkg_names: list[str]) -> None:
+        """Uninstall provided packages."""
+        if not pkg_names:
+            raise ValueError("No package names provided")
+
+        self._execute_pip_cmd("uninstall", ["--yes", *pkg_names])
+
+    @staticmethod
+    def _execute_pip_cmd(subcommand: str, params: list[str]) -> None:
+        """Execute pip command."""
+        assert sys.executable, "Unable to launch pip command"
+
+        check_call(
+            [
+                sys.executable,
+                "-m",
+                "pip",
+                "--disable-pip-version-check",
+                subcommand,
+                *params,
+            ]
+        )
+
+
+def get_package_manager() -> PyPackageManager:
+    """Get python packages manager."""
+    return PyPackageManager()