Add Memtest86+ to x86_64 UEFI GRUB boot menu

Implements #203.

CHANGELOG.rst

@@ -7,6 +7,7 @@ Changelog
 
 Added
 -----
+- Add Memtest86+ to x86_64 UEFI GRUB boot menu.
 
 Changed
 -------

archiso/mkarchiso

@@ -712,6 +712,14 @@ _make_bootmode_uefi-x64.grub.esp() {
         mcopy -i "${efibootimg}" "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ::/shellx64.efi
     fi
 
+    # Add other aditional/extra files to ${install_dir}/boot/
+    if [[ -e "${pacstrap_dir}/boot/memtest86+/memtest.efi" ]]; then
+        install -m 0644 -- "${pacstrap_dir}/boot/memtest86+/memtest.efi" "${isofs_dir}/${install_dir}/boot/memtest.efi"
+        install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/licenses/memtest86+/"
+        install -m 0644 -- "${pacstrap_dir}/usr/share/licenses/common/GPL2/license.txt" \
+            "${isofs_dir}/${install_dir}/boot/licenses/memtest86+/"
+    fi
+
     _msg_info "Done! GRUB set up for UEFI booting successfully."
 }
 
@@ -997,6 +1005,9 @@ _validate_requirements_bootmode_uefi-x64.grub.esp() {
     if [[ ! " ${pkg_list[*]} " =~ ' edk2-shell ' ]]; then
         _msg_info "'edk2-shell' is not in the package list. The ISO will not contain a bootable UEFI shell."
     fi
+    if [[ ! " ${pkg_list[*]} " =~ ' memtest86+-efi ' ]]; then
+        _msg_info "Validating '${bootmode}': 'memtest86+-efi' is not in the package list. Memory testing will not be available from GRUB."
+    fi
 }
 
 _validate_requirements_bootmode_uefi-x64.grub.eltorito() {

configs/releng/grub/grub.cfg

@@ -46,6 +46,11 @@ menuentry "Arch Linux install medium with speakup screen reader (x86_64, UEFI)"
 
 if [ "${grub_platform}" == "efi" ]; then
     if [ "${grub_cpu}" == "x86_64" ]; then
+        menuentry "Run Memtest86+ (RAM test)" --class memtest86 --class gnu --class tool {
+            set gfxpayload=800x600,1024x768
+            search --fs-uuid --no-floppy --set=root --label %ARCHISO_LABEL%
+            linux /%INSTALL_DIR%/boot/memtest.efi
+        }
         menuentry "UEFI Shell" {
             insmod chain
             search --no-floppy --set=root --label %ARCHISO_LABEL%

configs/releng/packages.x86_64

@@ -60,6 +60,7 @@ man-pages
 mc
 mdadm
 memtest86+
+memtest86+-efi
 mkinitcpio
 mkinitcpio-archiso
 mkinitcpio-nfs-utils