***: add initial initrd build

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "init"
+version = "0.1.0"

Cargo.toml

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+[workspace]
+members = [
+    "init"
+]

build.sh

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+#!/bin/sh
+
+set -e
+
+if [ "${ARCH}" = "" ]; then
+    ARCH=aarch64
+fi
+
+if [ "${PROFILE}" = "" ]; then
+    PROFILE=debug
+fi
+
+USER_TARGET=${ARCH}-unknown-yggdrasil
+USER_CARGO_OPTS="--target=${USER_TARGET}"
+
+USER_FILES=init
+
+pstatus() {
+    echo -e "[BUILD] \033[32;1m$@\033[0m"
+}
+
+die() {
+    echo -e "[ERROR] \033[31;1m$@\033[0m" >&2
+    exit 1
+}
+
+check_toolchain() {
+    pstatus "Checking toolchain"
+    if ! cargo +ygg-stage1 --version; then
+        die "Yggdrasil OS Rust toolchain is not built/installed, see https://git.alnyan.me/yggdrasil/yggdrasil-rust"
+    fi
+}
+
+pack_initrd() {
+    cd "target/${USER_TARGET}/${PROFILE}"
+    tar --xform='s/^/\//' -cf initrd.tar ${USER_FILES}
+    cd -
+}
+
+check_toolchain
+
+case "$1" in
+    build|"")
+        pstatus "Building userspace programs"
+        cargo +ygg-stage1 build ${USER_CARGO_OPTS}
+
+        pstatus "Creating initrd.tar"
+        pack_initrd
+        ;;
+    **)
+        ;;
+esac

init/Cargo.toml

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+[package]
+name = "init"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

init/src/main.rs

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+fn main() {
+    println!("Hello!");
+}