From de352f683f104c68106d488863f338afdb836e94 Mon Sep 17 00:00:00 2001
From: Hermes Agent <hermes@localhost>
Date: Tue, 11 Aug 2026 20:53:53 +0000
Subject: Add independent Rust Hasher rootfs builder

---
 src/main.rs | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/main.rs

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..44cb296
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,54 @@
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+use std::process::Command;
+
+use alt_controller_image::{artifact_path, Profile};
+
+fn run(command: &mut Command, description: &str) {
+    let status = command.status().unwrap_or_else(|error| panic!("{description}: {error}"));
+    assert!(status.success(), "{description} exited with {status}");
+}
+
+fn main() {
+    let project = env::current_dir().expect("current directory");
+    let profile_path = project.join("profiles/alt-controller.profile");
+    let profile = Profile::load(&profile_path).unwrap_or_else(|error| panic!("profile: {error}"));
+    let workdir: PathBuf = project.join("work/alt-controller");
+    let rootfs = workdir.join("chroot");
+    let artifact = artifact_path(&project);
+
+    if workdir.exists() {
+        fs::remove_dir_all(&workdir).expect("remove previous Hasher workdir");
+    }
+    fs::create_dir_all(&workdir).expect("create Hasher workdir");
+    fs::create_dir_all(artifact.parent().expect("artifact parent")).expect("create output directory");
+
+    run(
+        Command::new("hsh")
+            .args(["--mountpoints=/proc", "--initroot-only", "--workdir"])
+            .arg(&workdir),
+        "initialize isolated Hasher root",
+    );
+
+    let mut install = Command::new("hsh-install");
+    install.args(["--mountpoints=/proc", "--workdir"]);
+    install.arg(&workdir);
+    install.args(profile.install_arguments());
+    run(&mut install, "install target rootfs packages");
+
+    if artifact.exists() {
+        fs::remove_file(&artifact).expect("remove previous artifact");
+    }
+    run(
+        Command::new("tar")
+            .args(["--numeric-owner", "--xattrs", "--acls", "--exclude=./.host", "-C"])
+            .arg(&rootfs)
+            .args(["-cpf"])
+            .arg(&artifact)
+            .arg("."),
+        "archive isolated rootfs",
+    );
+
+    println!("{}", artifact.display());
+}
-- 
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