configs/*/grub/grub.cfg: do not hardcode the architecture and platform

Construct a human readable platform identifier from GRUB's built-in
variables and use it in menu item descriptions.

Only add the menu entries for the additional tools (UEFI shell,
Memtest86+) if the files exist.

Modify baseline's `grub.cfg` to closer match releng.

1 files changed, 57 insertions, 3 deletions

diff --git a/configs/baseline/grub/grub.cfg b/configs/baseline/grub/grub.cfg
index 371e6ee..c76657b 100644
--- a/configs/baseline/grub/grub.cfg
+++ b/configs/baseline/grub/grub.cfg
@@ -36,6 +36,22 @@ if [ -z "${ARCHISO_UUID}" ]; then
     probe --set ARCHISO_UUID --fs-uuid "${root}"
 fi
 
+# Get a human readable platform identifier
+if [ "${grub_platform}" == 'efi' ]; then
+    archiso_platform='UEFI'
+    if [ "${grub_cpu}" == 'x86_64' ]; then
+        archiso_platform="x64 ${archiso_platform}"
+    elif [ "${grub_cpu}" == 'i386' ]; then
+        archiso_platform="IA32 ${archiso_platform}"
+    else
+        archiso_platform="${grub_cpu} ${archiso_platform}"
+    fi
+elif [ "${grub_platform}" == 'pc' ]; then
+    archiso_platform='BIOS'
+else
+    archiso_platform="${grub_cpu} ${grub_platform}"
+fi
+
 # Set default menu entry
 default=archlinux
 timeout=15
@@ -44,8 +60,46 @@ timeout_style=menu
 
 # Menu entries
 
-menuentry "Arch Linux (x86_64, UEFI)" --class arch --class gnu-linux --class gnu --class os --id 'archlinux' {
+menuentry "Arch Linux (%ARCH%, ${archiso_platform})" --class arch --class gnu-linux --class gnu --class os --id 'archlinux' {
     set gfxpayload=keep
-    linux /%INSTALL_DIR%/boot/x86_64/vmlinuz-linux archisobasedir=%INSTALL_DIR% archisodevice=UUID=${ARCHISO_UUID}
-    initrd /%INSTALL_DIR%/boot/x86_64/initramfs-linux.img
+    linux /%INSTALL_DIR%/boot/%ARCH%/vmlinuz-linux archisobasedir=%INSTALL_DIR% archisodevice=UUID=${ARCHISO_UUID}
+    initrd /%INSTALL_DIR%/boot/%ARCH%/initramfs-linux.img
+}
+
+if [ "${grub_platform}" == 'efi' -a "${grub_cpu}" == 'x86_64' -a -f '/boot/memtest86+/memtest.efi' ]; then
+    menuentry 'Run Memtest86+ (RAM test)' --class memtest86 --class gnu --class tool {
+        set gfxpayload=800x600,1024x768
+        linux /boot/memtest86+/memtest.efi
+    }
+fi
+if [ "${grub_platform}" == 'pc' -a -f '/boot/memtest86+/memtest' ]; then
+    menuentry 'Run Memtest86+ (RAM test)' --class memtest86 --class gnu --class tool {
+        set gfxpayload=800x600,1024x768
+        linux /boot/memtest86+/memtest
+    }
+fi
+if [ "${grub_platform}" == 'efi' ]; then
+    if [ "${grub_cpu}" == 'x86_64' -a -f '/shellx64.efi' ]; then
+        menuentry 'UEFI Shell' {
+            chainloader /shellx64.efi
+        }
+    elif [ "${grub_cpu}" == "i386" -a -f '/shellia32.efi' ]; then
+        menuentry 'UEFI Shell' {
+            chainloader /shellia32.efi
+        }
+    fi
+
+    menuentry 'UEFI Firmware Settings' --id 'uefi-firmware' {
+        fwsetup
+    }
+fi
+
+menuentry 'System shutdown' --class shutdown --class poweroff {
+    echo 'System shutting down...'
+    halt
+}
+
+menuentry 'System restart' --class reboot --class restart {
+    echo 'System rebooting...'
+    reboot
 }