Add qcow2 support

src/main.rs

@@ -1,12 +1,14 @@
 mod build;
+mod command;
 mod image;
+mod meta;
 mod qemu;
 mod registry;
 
 use anyhow::Result;
 use clap::{Parser, Subcommand};
 
-use crate::{image::ImageCmd, qemu::RunCmd};
+use crate::{build::BuildCmd, image::ImageCmd, qemu::RunCmd};
 
 #[derive(Parser, Debug)]
 #[command(about = "Build bootable initrd VMs from container images")]
@@ -18,13 +20,7 @@ struct Cli {
 #[derive(Subcommand, Debug)]
 enum Commands {
     /// Build initrd from an image (podman image must exist)
-    Build {
-        /// Image name (e.g. alpine:3.15 or slim:tag)
-        image: String,
-        /// Size hint (unused in v1 initrd)
-        #[arg(short = 's', long, default_value = "512")]
-        _size: String,
-    },
+    Build(BuildCmd),
     /// Launch a previously built VM via QEMU.
     Run(RunCmd),
     /// List slim images in the registry
@@ -35,8 +31,8 @@ enum Commands {
 fn main() -> Result<()> {
     let cli = Cli::parse();
     match cli.command {
-        Commands::Build { image, _size: _ } => {
-            build::build(&image)?;
+        Commands::Build(cmd) => {
+            build::build(cmd)?;
         }
         Commands::Run(cmd) => {
             qemu::run(cmd)?;