virtme-ng: allow to run main commands directly from source

Provide helper scripts for the virtme-ng commands that can be executed
directly from the source directory (without necessarily installing
virtme-ng in the system).

This restores an old behavior of the legacy virtme that used to provide
such helpers.

Suggested-by: Paul McKenney <[email protected]>
Signed-off-by: Andrea Righi <[email protected]>

virtme-configkernel

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+# -*- mode: python -*-
+# virtme-configkernel: Configure a kernel for virtme
+# Copyright © 2014 Andy Lutomirski
+# Licensed under the GPLv2, which is available in the virtme distribution
+# as a file called LICENSE with SHA-256 hash:
+# 8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643
+
+# This file is not installed; it's just used to run virtme from inside
+# a source distribution.
+
+# NOTE: this command is deprecated, please use vng instead.
+
+import sys
+from virtme.commands import configkernel
+
+exit(configkernel.main())

virtme-mkinitramfs

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+# -*- mode: python -*-
+# virtme-mkinitramfs: Generate an initramfs image for virtme
+# Copyright © 2019 Marcos Paulo de Souza
+# Licensed under the GPLv2, which is available in the virtme distribution
+# as a file called LICENSE with SHA-256 hash:
+# 8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643
+
+# This file is not installed; it's just use to run virtme from inside
+# a source distribution.
+
+# NOTE: this command is deprecated, please use vng instead.
+
+import sys
+from virtme.commands import mkinitramfs
+
+exit(mkinitramfs.main())

virtme-run

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+# -*- mode: python -*-
+# virtme-run: The legacy command-line virtme frontend
+# Copyright © 2014 Andy Lutomirski
+# Licensed under the GPLv2, which is available in the virtme distribution
+# as a file called LICENSE with SHA-256 hash:
+# 8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643
+
+# This file is not installed; it's just use to run virtme from inside
+# a source distribution.
+
+# NOTE: this command is deprecated, please use vng instead.
+
+import sys
+from virtme.commands import run
+
+exit(run.main())

vng

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+# -*- mode: python -*-
+# vng: The main command-line virtme-ng frontend
+
+# This file is not installed; it's just use to run virtme-ng from inside a
+# source distribution.
+
+import os
+import sys
+from virtme_ng import run
+
+# Update PATH to make sure that virtme-ng can be executed directly from the
+# source directory, without necessarily installing virtme-ng in the system.
+def update_path():
+    script_dir = os.path.dirname(os.path.abspath(__file__))
+    current_path = os.environ.get('PATH', '')
+    new_path = f'{script_dir}:{current_path}'
+    os.environ['PATH'] = new_path
+
+update_path()
+exit(run.main())