Red Bear OS — microkernel OS in Rust, based on Redox

Derivative of Redox OS (https://www.redox-os.org) adding:
- AMD GPU driver (amdgpu) via LinuxKPI compat layer
- ext4 filesystem support (ext4d scheme daemon)
- ACPI fixes for AMD bare metal (x2APIC, DMAR, IVRS, MCFG)
- Custom branding (hostname, os-release, boot identity)

Build system is full upstream Redox with RBOS overlay in local/.
Patches for kernel, base, and relibc are symlinked from local/patches/
and protected from make clean/distclean. Custom recipes live in
local/recipes/ with symlinks into the recipes/ search path.

Build:  make all CONFIG_NAME=redbear-full
Sync:   ./local/scripts/sync-upstream.sh

src/cook/ident.rs

@@ -0,0 +1,46 @@
+use std::{
+    process::{Command, Stdio},
+    sync::OnceLock,
+};
+
+#[derive(Debug, Default)]
+pub struct IdentifierConfig {
+    pub commit: String,
+    pub time: String,
+}
+
+impl IdentifierConfig {
+    fn new() -> Self {
+        let (commit, _) = crate::cook::fs::get_git_head_rev(
+            &std::env::current_dir().expect("unable to get $PWD"),
+        )
+        .unwrap_or(("".into(), false));
+        // better than importing heavy deps like chrono
+        let time = String::from_utf8_lossy(
+            &Command::new("date")
+                .arg("-u")
+                .arg("+%Y-%m-%dT%H:%M:%SZ")
+                .stdout(Stdio::piped())
+                .output()
+                .expect("Failed to get current ISO-formatted time")
+                .stdout
+                .trim_ascii(),
+        )
+        .into();
+        IdentifierConfig { commit, time }
+    }
+}
+
+static IDENTIFIER_CONFIG: OnceLock<IdentifierConfig> = OnceLock::new();
+
+pub fn get_ident() -> &'static IdentifierConfig {
+    IDENTIFIER_CONFIG
+        .get()
+        .expect("Identifier is not initialized")
+}
+
+pub fn init_ident() {
+    IDENTIFIER_CONFIG
+        .set(IdentifierConfig::new())
+        .expect("Identifier is initialized twice")
+}