lanzatool: bootspec from generation

The bootspec is now read from each generation so that more than one
entry can be generated when calling install

nix/lanzaboote.nix

@@ -38,16 +38,20 @@ in
     boot.loader.supportsInitrdSecrets = mkForce true;
     boot.loader.external = {
       enable = true;
-      passBootspec = true;
+      installHook = pkgs.writeShellScript "bootinstall" ''
-      installHook = "${pkgs.writeShellScriptBin "bootinstall" ''
+        ${optionalString cfg.enrollKeys ''
-          ${optionalString cfg.enrollKeys ''
+          mkdir -p /tmp/pki
-            mkdir -p /tmp/pki
+          cp -r ${cfg.pkiBundle}/* /tmp/pki
-            cp -r ${cfg.pkiBundle}/* /tmp/pki
+          ${sbctlWithPki}/bin/sbctl enroll-keys --yes-this-might-brick-my-machine
-            ${sbctlWithPki}/bin/sbctl enroll-keys --yes-this-might-brick-my-machine
+        ''}
-          ''}
+  
-        ${cfg.package}/bin/lanzatool install --pki-bundle ${cfg.pkiBundle} --public-key ${cfg.publicKeyFile} --private-key ${cfg.privateKeyFile} "$@" /nix/var/nix/profiles/system-*-link
+        ${cfg.package}/bin/lanzatool install \
-      ''}/bin/bootinstall";
+          --pki-bundle ${cfg.pkiBundle} \
-      # ${cfg.package}/bin/lanzatool install ${optionalString cfg.enrollKeys "--auto-enroll"} --pki-bundle ${cfg.pkiBundle}
+          --public-key ${cfg.publicKeyFile} \
+          --private-key ${cfg.privateKeyFile} \
+          ${config.boot.loader.efi.efiSysMountPoint} \
+          /nix/var/nix/profiles/system-*-link
+      '';
     };
   };
 }

rust/lanzatool/bootspec.json

@@ -15,9 +15,6 @@
   "label": "LanzaOS",
   "toplevel": "/run/current-system",
   "extension": {
-    "esp": "esp",
-    "systemd": "/run/current-system/systemd",
-    "bootctl": "/run/current-system/sw/bin/bootctl",
     "osRelease": "/etc/os-release"
   }
 }

rust/lanzatool/src/bootspec.rs

@@ -25,8 +25,5 @@ pub struct Bootspec {
 #[derive(Debug, Default, Serialize, Deserialize, PartialEq, Eq)]
 #[serde(rename_all = "camelCase")]
 pub struct Extension {
-    pub esp: String,
-    pub bootctl: PathBuf,
     pub os_release: PathBuf,
-    pub systemd: PathBuf,
 }

rust/lanzatool/src/cli.rs

@@ -35,7 +35,7 @@ struct InstallCommand {
     #[arg(long, default_value = "false")]
     auto_enroll: bool,
 
-    bootspec: PathBuf,
+    esp: PathBuf,
 
     generations: Vec<PathBuf>,
 }
@@ -67,7 +67,7 @@ fn install(args: InstallCommand) -> Result<()> {
         args.private_key,
         args.pki_bundle,
         args.auto_enroll,
-        args.bootspec,
+        args.esp,
         args.generations,
     )
     .install()

rust/lanzatool/src/esp.rs

@@ -1,7 +1,6 @@
 use anyhow::{Context, Result};
 use std::path::{Path, PathBuf};
 
-use crate::bootspec::Bootspec;
 use crate::generation::Generation;
 
 pub struct EspPaths {
@@ -18,20 +17,22 @@ pub struct EspPaths {
 }
 
 impl EspPaths {
-    pub fn new(esp: &str, generation: Generation, bootspec: &Bootspec) -> Result<Self> {
+    pub fn new(esp: impl AsRef<Path>, generation: &Generation) -> Result<Self> {
-        let esp = Path::new(esp);
+        let esp = esp.as_ref();
         let esp_nixos = esp.join("EFI/nixos");
         let esp_linux = esp.join("EFI/Linux");
         let esp_systemd = esp.join("EFI/systemd");
         let esp_efi_fallback_dir = esp.join("EFI/BOOT");
 
+        let bootspec = &generation.bootspec;
+
         Ok(Self {
-            esp: esp.to_owned(),
+            esp: esp.to_path_buf(),
             nixos: esp_nixos.clone(),
             kernel: esp_nixos.join(nixos_path(&bootspec.kernel, "bzImage")?),
             initrd: esp_nixos.join(nixos_path(&bootspec.initrd, "initrd")?),
             linux: esp_linux.clone(),
-            lanzaboote_image: esp_linux.join(generation_path(generation)),
+            lanzaboote_image: esp_linux.join(generation_path(&generation)),
             efi_fallback_dir: esp_efi_fallback_dir.clone(),
             efi_fallback: esp_efi_fallback_dir.join("BOOTX64.EFI"),
             systemd: esp_systemd.clone(),
@@ -60,6 +61,6 @@ fn nixos_path(path: impl AsRef<Path>, name: &str) -> Result<PathBuf> {
     Ok(PathBuf::from(nixos_filename))
 }
 
-fn generation_path(generation: Generation) -> PathBuf {
+fn generation_path(generation: &Generation) -> PathBuf {
     PathBuf::from(format!("nixos-generation-{}.efi", generation))
 }

rust/lanzatool/src/generation.rs

@@ -1,36 +1,55 @@
 use std::fmt;
+use std::fs;
 use std::path::Path;
 
 use anyhow::{Context, Result};
 
+use crate::bootspec::Bootspec;
+
 #[derive(Debug)]
-pub struct Generation(u64);
+pub struct Generation {
+    version: u64,
+    pub bootspec: Bootspec,
+}
 
 impl Generation {
     pub fn from_toplevel(toplevel: impl AsRef<Path>) -> Result<Self> {
-        let file_name = toplevel.as_ref().file_name().ok_or(anyhow::anyhow!(
+        let bootspec_path = toplevel.as_ref().join("bootspec/boot.v1.json");
-            "Failed to extract file name from generation"
+        let bootspec: Bootspec = serde_json::from_slice(
-        ))?;
+            &fs::read(&bootspec_path).context("Failed to read bootspec file")?,
+        )
+        .context("Failed to parse bootspec json")?;
 
-        let file_name_str = file_name
+        Ok(Self {
-            .to_str()
+            version: parse_version(toplevel)?,
-            .with_context(|| "Failed to convert file name of generation to string")?;
+            bootspec,
-
+        })
-        let generation_version = file_name_str
-            .split("-")
-            .nth(1)
-            .ok_or(anyhow::anyhow!("Failed to extract version from generation"))?;
-
-        let parsed_generation_version = generation_version.parse().with_context(|| {
-            format!("Failed to parse generation version: {}", generation_version)
-        })?;
-
-        Ok(Self(parsed_generation_version))
     }
 }
 
 impl fmt::Display for Generation {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self.0)
+        write!(f, "{}", self.version)
     }
 }
+
+fn parse_version(toplevel: impl AsRef<Path>) -> Result<u64> {
+    let file_name = toplevel.as_ref().file_name().ok_or(anyhow::anyhow!(
+        "Failed to extract file name from generation"
+    ))?;
+
+    let file_name_str = file_name
+        .to_str()
+        .with_context(|| "Failed to convert file name of generation to string")?;
+
+    let generation_version = file_name_str
+        .split("-")
+        .nth(1)
+        .ok_or(anyhow::anyhow!("Failed to extract version from generation"))?;
+
+    let parsed_generation_version = generation_version
+        .parse()
+        .with_context(|| format!("Failed to parse generation version: {}", generation_version))?;
+
+    Ok(parsed_generation_version)
+}

rust/lanzatool/src/install.rs

@@ -7,7 +7,6 @@ use anyhow::{Context, Result};
 use nix::unistd::sync;
 use tempfile::tempdir;
 
-use crate::bootspec::Bootspec;
 use crate::esp::EspPaths;
 use crate::generation::Generation;
 use crate::pe;
@@ -20,7 +19,7 @@ pub struct Installer {
     private_key: PathBuf,
     _pki_bundle: Option<PathBuf>,
     _auto_enroll: bool,
-    bootspec: PathBuf,
+    esp: PathBuf,
     generations: Vec<PathBuf>,
 }
 
@@ -32,7 +31,7 @@ impl Installer {
         private_key: PathBuf,
         _pki_bundle: Option<PathBuf>,
         _auto_enroll: bool,
-        bootspec: PathBuf,
+        esp: PathBuf,
         generations: Vec<PathBuf>,
     ) -> Self {
         Self {
@@ -42,7 +41,7 @@ impl Installer {
             private_key,
             _pki_bundle,
             _auto_enroll,
-            bootspec,
+            esp,
             generations,
         }
     }
@@ -50,7 +49,7 @@ impl Installer {
     pub fn install(&self) -> Result<()> {
         for toplevel in &self.generations {
             let generation = Generation::from_toplevel(toplevel).with_context(|| {
-                format!("Failed to extract generation version from: {toplevel:?}")
+                format!("Failed to build generation from toplevel: {toplevel:?}")
             })?;
 
             println!("Installing generation {generation}");
@@ -64,16 +63,14 @@ impl Installer {
     pub fn install_generation(&self, generation: Generation) -> Result<()> {
         println!("Reading bootspec...");
 
-        let bootspec_doc: Bootspec = serde_json::from_slice(
+        let bootspec = &generation.bootspec;
-            &fs::read(&self.bootspec).context("Failed to read bootspec file")?,
-        )
-        .context("Failed to parse bootspec json")?;
 
-        let esp_paths = EspPaths::new(&bootspec_doc.extension.esp, generation, &bootspec_doc)?;
+        let esp_paths = EspPaths::new(&self.esp, &generation)?;
 
         println!("Assembling lanzaboote image...");
 
-        let kernel_cmdline = assemble_kernel_cmdline(bootspec_doc.init, bootspec_doc.kernel_params);
+        let kernel_cmdline =
+            assemble_kernel_cmdline(&bootspec.init, bootspec.kernel_params.clone());
 
         // prepare a secure temporary directory
         // permission bits are not set, because when files below
@@ -86,7 +83,7 @@ impl Installer {
         let lanzaboote_image = pe::lanzaboote_image(
             &secure_temp_dir,
             &self.lanzaboote_stub,
-            &bootspec_doc.extension.os_release,
+            &bootspec.extension.os_release,
             &kernel_cmdline,
             &esp_paths.kernel,
             &esp_paths.initrd,
@@ -97,8 +94,8 @@ impl Installer {
         println!("Wrapping initrd into a PE binary...");
 
         let initrd_location = secure_temp_dir.path().join("initrd");
-        copy(&bootspec_doc.initrd, &initrd_location)?;
+        copy(&bootspec.initrd, &initrd_location)?;
-        if let Some(initrd_secrets_script) = bootspec_doc.initrd_secrets {
+        if let Some(initrd_secrets_script) = &bootspec.initrd_secrets {
             append_initrd_secrets(&initrd_secrets_script, &initrd_location)?;
         }
         let wrapped_initrd = pe::wrap_initrd(&secure_temp_dir, &self.initrd_stub, &initrd_location)
@@ -108,16 +105,15 @@ impl Installer {
 
         let signer = Signer::new(&self.public_key, &self.private_key);
 
-        let systemd_boot = bootspec_doc
+        let systemd_boot = bootspec
-            .extension
+            .toplevel
-            .systemd
+            .join("systemd/lib/systemd/boot/efi/systemd-bootx64.efi");
-            .join("lib/systemd/boot/efi/systemd-bootx64.efi");
 
         let files_to_copy_and_sign = [
             (&systemd_boot, &esp_paths.efi_fallback),
             (&systemd_boot, &esp_paths.systemd_boot),
             (&lanzaboote_image, &esp_paths.lanzaboote_image),
-            (&bootspec_doc.kernel, &esp_paths.kernel),
+            (&bootspec.kernel, &esp_paths.kernel),
             (&wrapped_initrd, &esp_paths.initrd),
         ];
 
@@ -160,11 +156,11 @@ pub fn append_initrd_secrets(
     Ok(())
 }
 
-fn assemble_kernel_cmdline(init: PathBuf, kernel_params: Vec<String>) -> Vec<String> {
+fn assemble_kernel_cmdline(init: &Path, kernel_params: Vec<String>) -> Vec<String> {
-    let init_string = init
+    let init_string = String::from(
-        .into_os_string()
+        init.to_str()
-        .into_string()
+            .expect("Failed to convert init path to string"),
-        .expect("Failed to convert init path to string");
+    );
     let mut kernel_cmdline: Vec<String> = vec![format!("init={}", init_string)];
     kernel_cmdline.extend(kernel_params);
     kernel_cmdline