kratart: async image extraction

crates/kratart/examples/squashify.rs

@@ -0,0 +1,26 @@
+use std::{env::args, path::PathBuf};
+
+use anyhow::Result;
+use env_logger::Env;
+use kratart::image::{cache::ImageCache, compiler::ImageCompiler, name::ImageName};
+use tokio::fs;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    env_logger::Builder::from_env(Env::default().default_filter_or("warn")).init();
+
+    let image = ImageName::parse(&args().nth(1).unwrap())?;
+    let cache_dir = PathBuf::from("krata-cache");
+    if !cache_dir.exists() {
+        fs::create_dir(&cache_dir).await?;
+    }
+    let cache = ImageCache::new(&cache_dir)?;
+    let compiler = ImageCompiler::new(&cache)?;
+    let info = compiler.compile(&image).await?;
+    println!(
+        "generated squashfs of {} to {}",
+        image,
+        info.image_squashfs.to_string_lossy()
+    );
+    Ok(())
+}