From 68807f7e601340ddb16026d54873ece3c0beb451 Mon Sep 17 00:00:00 2001
From: Gardouille <gardouille@gmail.com>
Date: Fri, 11 Dec 2020 15:07:25 +0100
Subject: [PATCH] Script to create (partition, mount,...) EFI device

---
 debian/create.efi.device.sh | 45 +++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100755 debian/create.efi.device.sh

diff --git a/debian/create.efi.device.sh b/debian/create.efi.device.sh
new file mode 100755
index 0000000..abbb1a1
--- /dev/null
+++ b/debian/create.efi.device.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+
+EFI_MOUNTPATH="/boot/efi"
+
+# Show a warning if not in a chroot (a rescue/chroot mode is mostly attempted)
+if ! ischroot; then
+	printf "%s" "Take care, you are not in a chroot environment !\n"
+fi
+
+# Select the future EFI partition
+printf "%b" "Select device and partition to use for UEFI Stub (eg. /dev/sdd1) :\n"
+read -r EFI_PARTITION
+
+# Test if partition exists
+if [ ! -b "${EFI_PARTITION}" ]; then
+	EFI_DEVICE=$(printf "%s" "${EFI_PARTITION}" | sed "s;\(/dev/...\).*;\1;")
+
+	printf "%b\n" "${EFI_PARTITION} partition doesn't exist. Create it with parted."
+	parted "${EFI_DEVICE}" mklabel gpt
+	parted "${EFI_DEVICE}" mkpart primary 1049kB 1gB
+fi
+
+# Enable boot flag
+parted "${EFI_DEVICE}" set 1 boot on
+# Format in vfat
+mkfs.fat "${EFI_PARTITION}"
+
+# Create mountpoint if needed
+mkdir -p -- "${EFI_MOUNTPATH}"
+# And mount it if not already mounted
+mountpoint -q "${EFI_MOUNTPATH}"   || mount -- "${EFI_PARTITION}" "${EFI_MOUNTPATH}"
+
+# Add EFI device automount in fstab
+EFI_UUID=$(blkid -s UUID -o value "${EFI_PARTITION}")
+printf "%b\n" "UUID=${EFI_UUID}              ${EFI_MOUNTPATH}       vfat    defaults,x-systemd.automount,x-systemd.device-timeout=2,x-systemd.idle-timeout=1min,noatime,noauto   0  2" >> /etc/fstab
+
+# Install required packages
+aptitude install -y efibootmgr efivar
+
+# Copy kernel and initrd
+printf "%b\n" "Copy kernel and initramfs to EFI partition : ${EFI_MOUNTPATH}"
+mkdir -p -- "${EFI_MOUNTPATH}"/EFI/debian/
+cp /vmlinuz /initrd.img -- "${EFI_MOUNTPATH}"
+
+exit 0