import: Add --size argument

The `ocivm import` command now supports setting the size of the created
filesystem/disk image.  This can be used to add free space to the disk.

src/ocivm/cli.py

@@ -2,6 +2,7 @@ import argparse
 import logging
 import tempfile
 from pathlib import Path
+from typing import Optional
 
 import rich.console
 import rich.logging
@@ -16,14 +17,14 @@ class CLI:
     def __init__(self, console: rich.console.Console) -> None:
         self.console = console
 
-    def import_image(self, name: str) -> None:
+    def import_image(self, name: str, size: Optional[str]) -> None:
         with tempfile.NamedTemporaryFile(suffix='.tar') as tmp_tar:
             with self.console.status('Exporting OCI image as tarball ...'):
                 tar = Path(tmp_tar.name)
                 image.make_tar(name, tar)
                 self.console.print('Created tarball:', tar)
             with self.console.status('Converting tarball to QCOW2 image ...'):
-                img = image.import_image(name, tar)
+                img = image.import_image(name, tar, size)
                 self.console.print('Created QCOW2 image:', img)
 
     def list_images(self) -> None:
@@ -49,6 +50,7 @@ def parse_args() -> argparse.Namespace:
     sp = parser.add_subparsers(dest='command', required=True)
 
     p_import = sp.add_parser('import', help='Import container image')
+    p_import.add_argument('--size', help='Image size')
     p_import.add_argument('name', help='Container image name')
 
     sp.add_parser('list', help='List VM images')
@@ -68,6 +70,6 @@ def main() -> None:
     cli = CLI(console)
     match args.command:
         case 'import':
-            cli.import_image(args.name)
+            cli.import_image(args.name, args.size)
         case 'list':
             cli.list_images()

src/ocivm/image.py

@@ -5,7 +5,7 @@ import string
 import subprocess
 import tempfile
 from pathlib import Path
-from typing import Iterable
+from typing import Iterable, Optional
 
 import xdg
 
@@ -63,7 +63,9 @@ def make_tar(name: str, dest: Path) -> None:
         )
 
 
-def import_image(name: str, src: Path, size: str = '+1G') -> Path:
+def import_image(name: str, src: Path, size: Optional[str]) -> Path:
+    if size is None:
+        size = '+1G'
     dest = get_image_dir() / name
     dest = dest.with_suffix('.qcow2')
     dest.parent.mkdir(parents=True, exist_ok=True)