BuildSystem: using sysroot doesn't need root privileges anymore!

Sysroot is now created with fakeroot. This allows root access to be
only needed for disk image creation, since it uses loopback devices.

script/image-create.sh

@@ -0,0 +1,96 @@
+#!/bin/bash
+
+if [[ -z $BANAN_DISK_IMAGE_PATH ]]; then
+	echo  "You must set the BANAN_DISK_IMAGE_PATH environment variable" >&2
+	exit 1
+fi
+
+if [[ -z $BANAN_SYSROOT ]]; then
+	echo  "You must set the BANAN_SYSROOT environment variable" >&2
+	exit 1
+fi
+
+if [[ -z $BANAN_TOOLCHAIN_PREFIX ]]; then
+	echo  "You must set the BANAN_TOOLCHAIN_PREFIX environment variable" >&2
+	exit 1
+fi
+
+if [[ -z $BANAN_ARCH ]]; then
+	echo  "You must set the BANAN_ARCH environment variable" >&2
+	exit 1
+fi
+
+DISK_SIZE=$[50 * 1024 * 1024]
+MOUNT_DIR=/mnt
+
+truncate -s 0 "$BANAN_DISK_IMAGE_PATH"
+truncate -s $DISK_SIZE "$BANAN_DISK_IMAGE_PATH"
+
+if [ "$BANAN_UEFI_BOOT" == "1" ]; then
+	sed -e 's/\s*\([-\+[:alnum:]]*\).*/\1/' << EOF | fdisk "$BANAN_DISK_IMAGE_PATH" > /dev/null
+	  g     # gpt
+	  n     # new partition
+	  1     # partition number 1
+	        # default (from the beginning of the disk)
+	  +16M  # efi system size
+	  n     # new partition
+	  2     # partition number 2
+	        # default (right after efi system partition)
+			# default (to the end of disk)
+	  t     # set type
+	  1     # ... of partition 1
+	  1     # efi system
+	  t     # set type
+	  2     # ... of partition 2
+	  20    # Linux filesystem
+	  w     # write changes
+EOF
+else
+	sed -e 's/\s*\([-\+[:alnum:]]*\).*/\1/' << EOF | fdisk "$BANAN_DISK_IMAGE_PATH" > /dev/null
+	  g     # gpt
+	  n     # new partition
+	  1     # partition number 1
+	        # default (from the beginning of the disk)
+	  +1M   # bios boot partition size
+	  n     # new partition
+	  2     # partition number 2
+	        # default (right after bios partition)
+			# default (to the end of disk)
+	  t     # set type
+	  1     # ... of partition 1
+	  4     # bios boot partition
+	  t     # set type
+	  2     # ... of partition 2
+	  20    # Linux filesystem
+	  w     # write changes
+EOF
+fi
+
+LOOP_DEV=$(sudo losetup -f --show "$BANAN_DISK_IMAGE_PATH")
+sudo partprobe $LOOP_DEV
+
+PARTITION1=${LOOP_DEV}p1
+PARTITION2=${LOOP_DEV}p2
+
+sudo mkfs.ext2 -b 1024 -q $PARTITION2
+
+if [[ "$BANAN_UEFI_BOOT" == "1" ]]; then
+	sudo mkfs.fat $PARTITION1 > /dev/null
+	sudo mount $PARTITION1 "$MOUNT_DIR"
+	sudo mkdir -p "$MOUNT_DIR/EFI/BOOT"
+	sudo "$BANAN_TOOLCHAIN_PREFIX/bin/grub-mkstandalone" -O "$BANAN_ARCH-efi" -o "$MOUNT_DIR/EFI/BOOT/BOOTX64.EFI" "boot/grub/grub.cfg=$BANAN_TOOLCHAIN_DIR/grub-memdisk.cfg"
+	sudo umount "$MOUNT_DIR"
+
+	sudo mount $PARTITION2 "$MOUNT_DIR"
+	sudo mkdir -p "$MOUNT_DIR/boot/grub"
+	sudo cp "$BANAN_TOOLCHAIN_DIR/grub-uefi.cfg" "$MOUNT_DIR/boot/grub/grub.cfg"
+	sudo umount "$MOUNT_DIR"
+else
+	sudo mount $PARTITION2 "$MOUNT_DIR"
+	sudo grub-install --no-floppy --target=i386-pc --modules="normal ext2 multiboot" --boot-directory="$MOUNT_DIR/boot" $LOOP_DEV
+	sudo mkdir -p "$MOUNT_DIR/boot/grub"
+	sudo cp "$BANAN_TOOLCHAIN_DIR/grub-legacy-boot.cfg" "$MOUNT_DIR/boot/grub/grub.cfg"
+	sudo umount "$MOUNT_DIR"
+fi
+
+sudo losetup -d $LOOP_DEV