Initial commit

01-install/20-boot.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# Runs INSIDE arch-chroot. systemd-boot + mkinitcpio with STATIC loader entries.
+# mkinitcpio already built /boot/initramfs-linux*.img during pacstrap, and its
+# pacman hooks rebuild them on every kernel update — nothing to regenerate here
+# or later. The kernel cmdline lives in the loader entry's `options` line.
+set -euo pipefail
+
+bootctl install                                  # ESP is mounted at /boot
+
+ROOT_UUID="$(findmnt -no UUID /)"
+
+# microcode image matching this CPU (both packages are installed)
+case "$(grep -m1 -oE 'Intel|AMD' /proc/cpuinfo)" in
+  Intel) UCODE="initrd  /intel-ucode.img" ;;
+  AMD)   UCODE="initrd  /amd-ucode.img" ;;
+  *)     UCODE="" ;;
+esac
+
+mkdir -p /boot/loader/entries
+
+cat > /boot/loader/loader.conf <<EOF
+default arch.conf
+timeout 3
+console-mode keep
+EOF
+
+cat > /boot/loader/entries/arch.conf <<EOF
+title   Arch Linux
+linux   /vmlinuz-linux
+$UCODE
+initrd  /initramfs-linux.img
+options root=UUID=$ROOT_UUID rw
+EOF
+
+cat > /boot/loader/entries/arch-fallback.conf <<EOF
+title   Arch Linux (fallback initramfs)
+linux   /vmlinuz-linux
+$UCODE
+initrd  /initramfs-linux-fallback.img
+options root=UUID=$ROOT_UUID rw
+EOF