Add scripts

build-iso

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+#!/bin/bash
+#
+
+# Prep build env
+rsync -ahvPS /usr/share/archiso/configs/releng/ temp/
+echo 'bc' > temp/packages.both
+rm temp/airootfs/etc/systemd/scripts/choose-mirror
+rm temp/airootfs/etc/systemd/system/choose-mirror.service
+rm temp/airootfs/etc/systemd/system/etc-pacman.d-gnupg.mount
+rm temp/airootfs/etc/systemd/system/pacman-init.service
+rm temp/airootfs/etc/udev/rules.d/81-dhcpcd.rules
+rmdir --ignore-fail-on-non-empty temp/airootfs/etc/udev/rules.d
+rmdir --ignore-fail-on-non-empty temp/airootfs/etc/udev
+cp mac-dgpu-disable-tool temp/airootfs/root/
+printf "\x07\x00\x00\x00\x01\x00\x00\x00" \
+    > temp/airootfs/root/gpu-power-prefs-fa4ce28d-b62f-4c99-9cc3-6815686e30f9
+chown -R root:root temp
+
+# Adjust boot menus
+sed -i 's/timeout 3/timeout 1/' temp/efiboot/loader/loader.conf
+sed -i 's/Arch Linux archiso x86_64/Mac dGPU Disable Tool/' temp/efiboot/loader/entries/*
+
+sed -i '/BACKGROUND/d' temp/syslinux/*
+echo 'PROMPT 1' >> temp/syslinux/archiso_head.cfg
+echo 'TIMEOUT 1' >> temp/syslinux/archiso_head.cfg
+echo 'DEFAULT arch64' >> temp/syslinux/archiso_head.cfg
+sed -i -r 's/Arch Linux( \(x86_64\)|)( live medium|)/Mac dGPU Disable Tool/' temp/syslinux/*
+sed -i '/allows/d' temp/syslinux/*
+
+# Add nomodeset boot option
+sed -i -r 's/^(options.*)$/\1 nomodeset/' temp/efiboot/loader/entries/archiso*
+sed -i -r 's/^(APPEND arch.*)$/\1 nomodeset/' temp/syslinux/*cfg
+
+# Modify live env
+echo '' >> temp/airootfs/etc/motd
+sed -i '/mirror/d' temp/airootfs/root/customize_airootfs.sh
+sed -i '/usermod/d' temp/airootfs/root/customize_airootfs.sh
+sed -i '/ssh/d' temp/airootfs/root/customize_airootfs.sh
+echo 'echo "~/mac-dgpu-disable-tool" >> /root/.bashrc' \
+    >> temp/airootfs/root/customize_airootfs.sh
+
+temp/build.sh -N dgpu -L DGPU -v
+

mac-dgpu-disable-tool

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+#!/bin/bash
+#
+
+SOURCE=/root/gpu-power-prefs-fa4ce28d-b62f-4c99-9cc3-6815686e30f9
+DEST=/sys/firmware/efi/efivars/gpu-power-prefs-fa4ce28d-b62f-4c99-9cc3-6815686e30f9
+needs_nvram_reset="no"
+
+# Colors
+CLEAR='\033[0m'
+RED='\033[31m'
+GREEN='\033[32m'
+YELLOW='\033[33m'
+ORANGE='\033[31;1m'
+BLUE='\033[34m'
+
+echo '## Mac dGPU Disable Tool ##'
+echo ''
+
+for f in /sys/firmware/efi/efivars/gfx*; do
+    if [[ -e "$f" ]]; then
+        echo -e "${YELLOE}Detected:${CLEAR} $f"
+        needs_nvram_reset="yes"
+    fi
+done
+
+for f in /sys/firmware/efi/efivars/gpu*; do
+    if [[ -e "$f" ]]; then
+        echo -e "${YELLOE}Detected:${CLEAR} $f"
+	needs_nvram_reset="yes"
+    fi
+done
+
+echo ""
+if [[ ! -e "/sys/firmware/efi/efivars" ]]; then
+    echo -e "${RED}ERROR:${CLEAR} EFIVARS not found"
+elif cmp "$SOURCE" "$DEST" >/dev/null 2>&1; then
+    echo -e "${YELLOW}Discrete GPU already disabled${CLEAR}"
+elif [[ "$needs_nvram_reset" == "yes" ]]; then
+    echo -e "${RED}ERROR:${CLEAR} Detected the above EFIVARS"
+    echo -e "Please reboot and reset the NVRAM"
+else
+    cp "$SOURCE" "$DEST"
+    chattr -i "$DEST"
+    umount /sys/firmware/efi/efivars
+    sync
+    echo -e "${GREEN}Discrete GPU successfully disabled${CLEAR}"
+fi
+echo ""
+read -p "Press Enter to poweroff the system... " -r unusedvar
+poweroff