Refactoed common function

These common function is renamed with _common
explicitly.

script/lib/preinstall_common.sh

@@ -0,0 +1,124 @@
+#!/bin/bash -u
+# ******************************************************************************* 
+#                                Pre-install stage 
+# ******************************************************************************* 
+
+function pre_install_common() {
+
+
+	# ----- Erase entire disk, create partitions, format them  and encrypt the LUKS partition -----
+	if [ ${ERASEALL} -eq 1 ] ; then
+
+		# Assign specified space and rest of disk to the EFI and LUKS partition, respectively.
+		if [  ${ISEFI} -eq 1 ] ; then
+			# Zap existing partition table and create new GPT
+			echo "...Initializing ${DEV} with GPT."
+			sgdisk --zap-all "${DEV}"
+			# Create EFI partition and format it
+			echo "...Creating an EFI partition on ${DEV}."
+			sgdisk --new=${EFIPARTITION}:0:+${EFISIZE} --change-name=${EFIPARTITION}:"EFI System"  --typecode=${EFIPARTITION}:ef00 "${DEV}"  
+			echo "...Formatting the EFI parttion."
+			mkfs.vfat -F 32 -n EFI-SP "${DEV}${EFIPARTITION}"
+			# Create Linux partition
+			echo "...Creating a Linux partition on ${DEV}."
+			sgdisk --new=${CRYPTPARTITION}:0:0    --change-name=${CRYPTPARTITION}:"Linux LUKS" --typecode=${CRYPTPARTITION}:8309 "${DEV}"
+			# Then print them
+			sgdisk --print "${DEV}"
+		else
+			# Zap existing partition table
+			echo "...Erasing partition table of ${DEV}."
+			dd if=/dev/zero of=${DEV} bs=512 count=1
+			# Create MBR and allocate max storage for Linux partition
+			echo "...Creating a Linux partition on ${DEV} with MBR."
+			sfdisk ${DEV} <<- HEREDOC
+			2M,,L
+			HEREDOC
+		fi	# if EFI firmware
+
+		# Encrypt the partition to install Linux
+		echo "...Initializing ${DEV}${CRYPTPARTITION} as crypt partition"
+		printf %s "${PASSPHRASE}" | cryptsetup luksFormat --type=luks1 --key-file - --batch-mode "${DEV}${CRYPTPARTITION}"
+
+	fi	# if erase all
+
+	# ----- Open the LUKS partition -----
+	# Open the crypt partition. 
+	echo "...Opening a crypt partition ${DEV}${CRYPTPARTITION} as \"${CRYPTPARTNAME}\""
+	printf %s "${PASSPHRASE}" | cryptsetup open -d - "${DEV}${CRYPTPARTITION}" ${CRYPTPARTNAME}
+
+	# Check whether successful open. If mapped, it is successful. 
+	if [ ! -e /dev/mapper/${CRYPTPARTNAME} ] ; then 
+		cat <<- HEREDOC 1>&2
+		***** ERROR : Cannot open LUKS volume "${CRYPTPARTNAME}" on ${DEV}${CRYPTPARTITION}. *****
+		...Check passphrase and your config.txt
+
+		...Installation process terminated..
+		HEREDOC
+		return 1 # with error status
+	fi	# if crypt volume is unable to open
+
+	# ----- Configure the LVM in LUKS volume -----
+	# Check volume group ${VGNAME} exist or not
+	if  vgdisplay -s ${VGNAME} &> /dev/null ; then		# if exist
+		echo "...Volume group ${VGNAME} already exist. Skipped to create. No problem."
+		echo "...Activating all logical volumes in volume group \"${VGNAME}\"."
+		vgchange -ay
+	else
+		echo "...Initializing a physical volume on \"${CRYPTPARTNAME}\""
+		pvcreate /dev/mapper/${CRYPTPARTNAME}
+		echo "...And then creating Volume group \"${VGNAME}\"."
+		vgcreate ${VGNAME} /dev/mapper/${CRYPTPARTNAME}
+	fi # if /dev/volume-groupt exist
+
+	# Create a SWAP Logical Volume on VG, if it doesn't exist
+	if [ -e /dev/mapper/${VGNAME}-${LVSWAPNAME} ] ; then 
+		echo "...Swap volume already exist. Skipped to create. No problem."
+	else
+		echo "...Creating logical volume \"${LVSWAPNAME}\" on \"${VGNAME}\"."
+		lvcreate -L ${LVSWAPSIZE} -n ${LVSWAPNAME} ${VGNAME} 
+	fi	# if /dev/mapper/swap volume already exit. 
+
+	# Create a ROOT Logical Volume on VG. 
+	if [ -e /dev/mapper/${VGNAME}-${LVROOTNAME} ] ; then # exist
+		if [ ${OVERWRITEINSTALL} -eq 1 ] ; then # exist and overwrite install
+			echo "...Logical volume "${VGNAME}-${LVROOTNAME}" already exists. OK."
+		else	# exist and not overwriteinstall
+			cat <<- HEREDOC 1>&2
+			***** ERROR : Logical volume "${VGNAME}-${LVROOTNAME}" already exists. *****
+			...Check LVROOTNAME environment variable in your config.txt.
+			HEREDOC
+			echo "...Deactivating all logical volumes in volume group \"${VGNAME}\"."
+			vgchange -a n ${VGNAME}
+			echo "...Closing LUKS volume \"${CRYPTPARTNAME}\"."
+			cryptsetup close  ${CRYPTPARTNAME}
+			cat <<- HEREDOC 1>&2
+
+			...Installation process terminated..
+			HEREDOC
+			return 1 # with error status
+		fi
+	else	# not exsit
+		if [ ${OVERWRITEINSTALL} -eq 1 ] ; then
+			cat <<- HEREDOC 1>&2
+			***** ERROR : Logical volume "${VGNAME}-${LVROOTNAME}" doesn't exist while overwrite install. *****
+			...Check consistency of your config.txt.
+			HEREDOC
+			echo "...Deactivate all logical volumes in volume group \"${VGNAME}\"."
+			vgchange -a n ${VGNAME}
+			echo "...Closing LUKS volume \"${CRYPTPARTNAME}\"."
+			cryptsetup close  ${CRYPTPARTNAME}
+			cat <<- HEREDOC 1>&2
+
+			...Installation process terminated..
+			HEREDOC
+			return 1 # with error status
+		else # not exist and not overwrite install
+			echo "...Creating logical volume \"${LVROOTNAME}\" on \"${VGNAME}\"."
+			lvcreate -l ${LVROOTSIZE} -n ${LVROOTNAME} ${VGNAME}
+		fi
+	fi
+
+
+	# successful return
+	return 0
+}