Started working on basic stuff, like main class and parsing arguments

box.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+
+import argparse
+import os
+import subprocess
+import tempfile
+
+
+class VMCreate:
+    CLOUD_IMAGE = "ci.iso"
+    CLOUD_INIT_FINISHED_CMD = "test /var/lib/cloud/instance/boot-finished"
+
+    def __init__(self, args):
+        self.vm_name = args.name
+        self.cpus = args.cpus
+        self.memory = args.memory
+        self.disk_size = args.disk_size
+        self.ubuntu_version = args.version
+        self._temp_path = None
+        self._disk_img = self.vm_name + '.vdi'
+        self._tmp = None
+
+    def run(self):
+        try:
+            self._prepare_temp()
+            self._download_image()
+            # self._convert_and_resize()
+        finally:
+            self._cleanup()
+
+    def _prepare_temp(self):
+        self._tmp = tempfile.mkdtemp()
+
+    def _download_image(self):
+        url = "https://cloud-images.ubuntu.com/releases/"
+        url += f"{self.ubuntu_version}/release/"
+        img = f"ubuntu-{self.ubuntu_version}-server-cloudimg-amd64.img"
+        url += img
+        print(url)
+
+        subprocess.call(['wget', url, '-O', os.path.join(self._tmp, img)])
+
+    def _cleanup(self):
+        subprocess.call(['rm', '-fr', self._tmp])
+
+
+def _create(args):
+    return VMCreate(args).run()
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Automate deployment and "
+                                     "maintenance of Ubuntu VMs using "
+                                     "VirtualBox and Ubuntu cloud images")
+    subparsers = parser.add_subparsers(help='supported commands')
+    create = subparsers.add_parser('create')
+    create.add_argument('name')
+    create.set_defaults(func=_create)
+    create.add_argument('-m', '--memory', default=12288, type=int,
+                        help="amount of memory in Megabytes, default 12GB")
+    create.add_argument('-c', '--cpus', default=6, type=int,
+                        help="amount of CPUs to be configured. Default 6.")
+    create.add_argument('-d', '--disk-size', default=20480, type=int,
+                        help="disk size to be expanded to. By default to 20GB")
+    create.add_argument('-v', '--version', default="18.04",
+                        help="Ubuntu server version. Default 18.04")
+
+    completion = subparsers.add_parser('completion')
+    completion.add_argument('shell', choices=['bash'],
+                            help="pick shell to generate completions for")
+
+    args = parser.parse_args()
+
+    return args.func(args)
+    try:
+        # __import__('ipdb').set_trace()
+        return args.func(args)
+    except AttributeError:
+        parser.print_help()
+        parser.exit()
+
+
+if __name__ == '__main__':
+    main()