set up boilerplate for virtualfs - impl nopfs

rose/__main__.py

@@ -6,6 +6,7 @@
 from rose.cache.database import migrate_database
 from rose.cache.update import update_cache_for_all_releases
 from rose.foundation.conf import Config
+from rose.virtualfs import start_virtualfs
 
 
 @dataclass
@@ -48,5 +49,17 @@ def clear(c: Context) -> None:
     c.config.cache_database_path.unlink()
 
 
+@cli.group()
+def fs() -> None:
+    """Manage the virtual library."""
+
+
+@cli.command()
+@click.pass_obj
+def mount(c: Context) -> None:
+    """Mount the virtual library."""
+    start_virtualfs(c.config)
+
+
 if __name__ == "__main__":
     cli()

rose/virtualfs/__init__.py

@@ -0,0 +1,15 @@
+import fuse
+
+from rose.foundation.conf import Config
+
+fuse.fuse_python_api = (0, 2)
+
+
+class VirtualFS(fuse.Fuse):
+    pass
+
+
+def start_virtualfs(c: Config):
+    server = VirtualFS()
+    server.parse([str(c.fuse_mount_dir)])
+    server.main()