installer script: work in progress (5)

pkg/de-p1st-installer/de-p1st-installer.sh

@@ -6,6 +6,7 @@ source installer.cfg     || { exit 1; }
 # load functions
 source lib/util.sh         || { exit 1; }
 source lib/user-input.sh   || { exit 1; }
+source lib/block-device.sh || { exit 1; }
 
 
 function check_network() {
@@ -159,6 +160,7 @@ function main() {
   get_default_mount_options || return $?
   choose_mount_options      || return $?
 
+  partition "${TARGET_BLOCK_DEVICE}" "$BIOS_TYPE"
   # TODO: use FS_DEFAULT_MOUNT_OPTIONS and FS_MOUNT_OPTIONS in combination
 }
 

pkg/de-p1st-installer/installer.cfg

@@ -8,9 +8,10 @@ LUKS_PWD=test
 
 KERNEL=linux
 
-# TARGET_BLOCK_DEVICE=/dev/sda
+TARGET_BLOCK_DEVICE=/dev/sda
+BOOT_PART_SIZE=500  # MiB
 FS=BTRFS
+FS_MOUNT_OPTIONS=('noatime')
 
 CPU_VENDOR=none
 BIOS_TYPE=uefi
-# FS_MOUNT_OPTIONS=()

pkg/de-p1st-installer/lib/block-device.sh

@@ -0,0 +1,105 @@
+#
+# lsblk
+#
+# -d, --nodeps      Do  not  print  holder  devices  or  slaves.
+# -p, --paths       Print full device paths.
+# -l, --list        Produce  output  in the form of a list.
+# -n, --noheadings
+# -x, --sort column
+
+function get_partitions(){
+  # $1 block-device
+  # return: the following variables:
+  #   PARTITIONS (array with one partition per entry)
+
+  # Remove first line of output (which is just the block device $1 itself)
+  # with sed: sed 1d
+  PARTITIONS="$(lsblk -pln -o name "$1" | sed 1d)" || return $?
+  newline_separated_to_array
+}
+
+function get_block_devices() {
+  # return: the following variables:
+  #   BLOCK_DEVICES (array with one entry for each block device)
+
+  # Get list of devices, one per line
+  BLOCK_DEVICES="$(lsblk -dplnx size -o name | grep -Ev "boot|rpmb|loop" | tac)" || return $?
+
+  newline_separated_to_array BLOCK_DEVICES  BLOCK_DEVICES || return $?
+}
+
+function get_block_devices_with_size() {
+  # return: the following variables:
+  #   BLOCK_DEVICE_SIZES (array with two entries for each block device: device path and device size)
+
+  # Get list of devices and their sizes, one pair per line
+  # Use sed to remove multiple white spaces: sed 's|\s\s*| |'
+  BLOCK_DEVICE_SIZES="$(lsblk -dplnx size -o name,size | grep -Ev "boot|rpmb|loop" | sed 's|\s\s*| |' | tac)"  || return $?
+
+  newline_to_space BLOCK_DEVICE_SIZES || return $?
+  space_separated_to_array BLOCK_DEVICE_SIZES BLOCK_DEVICE_SIZES || return $?
+}
+
+
+function partition() {
+  # $1: target block device
+  # $2: uefi or bios
+  if [ "$#" -ne 2 ]; then
+    echo "partition requires two args!";
+    return 1
+  fi
+  for i in "$@"; do
+    if [ -z "$i" ]; then
+      echo "partition: all given args must not be empty";
+      return 1;
+    fi
+  done
+
+  # if BOOT_PART_SIZE not given, set to default value
+  "${BOOT_PART_SIZE:='261'}"
+  # if too small, print warning and exit
+  if [ "${BOOT_PART_SIZE}" -lt "261" ]; then
+    echo "BOOT_PART_SIZE should be larger than 260!";
+    return 1;
+  fi
+
+  # As our data partition is encrypted,
+  # we need a separate boot partition!
+  case "$2" in
+	uefi)
+	  # EFI boot partition
+    #
+    # Create a partition with fat32 as the file system type and set the
+    # esp flag on it.
+    parted --script "$1" -- mklabel gpt \
+      mkpart ESP fat32 2Mib "${BOOT_PART_SIZE}MiB" \
+      set 1 esp on \
+      mkpart primary "${BOOT_PART_SIZE}MiB" 100% || return $?
+
+      get_partitions "$1" || return $?
+      BOOT_PART="${PARTITIONS[0]}"
+      LUKS_PART="${PARTITIONS[1]}"
+		;;
+	bios)
+	  # > On a BIOS/GPT configuration, a BIOS boot partition is required. GRUB embeds its `core.img`
+	  # > into this partition.
+	  # > For parted set/activate the flag bios_grub on the partition.
+	  #
+	  # archwiki -> GRUB#GUID_Partition_Table_(GPT)_specific_instructions
+	  # https://www.gnu.org/software/grub/manual/grub/html_node/BIOS-installation.html#BIOS-installation
+	  parted --script "$1" -- mklabel gpt \
+      mkpart primary 1MiB 2MiB \
+      set 1 bios_grub on \
+      mkpart primary 2MiB "${BOOT_PART_SIZE}MiB" \
+      mkpart primary "${BOOT_PART_SIZE}MiB" 100% || return $?
+
+      get_partitions "$1" || return $?
+      BOOT_PART="${PARTITIONS[2]}"
+      LUKS_PART="${PARTITIONS[3]}"
+		;;
+	*)
+		echo "Expected uefi or bios but got $2 instead!"
+		return 1
+		;;
+  esac
+}

pkg/de-p1st-installer/lib/util.sh

@@ -36,34 +36,3 @@ function space_separated_to_array() {
   # Without newline at last array element: https://unix.stackexchange.com/a/519917/315162
   readarray -d " " -t ptr2 < <(printf '%s' "$ptr")
 }
-
-
-
-
-function get_block_devices() {
-  # return: the following variables:
-  #   BLOCK_DEVICES (array with one entry for each block device)
-
-  # Get list of devices, one per line
-  BLOCK_DEVICES=$(lsblk -dplnx size -o name | grep -Ev "boot|rpmb|loop" | tac)
-
-  newline_separated_to_array BLOCK_DEVICES  BLOCK_DEVICES
-}
-
-function get_block_devices_with_size() {
-  # return: the following variables:
-  #   BLOCK_DEVICE_SIZES (array with two entries for each block device: device path and device size)
-
-  # Get list of devices and their sizes, one pair per line
-  # Use sed to remove multiple white spaces: sed 's|\s\s*| |'
-  BLOCK_DEVICE_SIZES="$(lsblk -dplnx size -o name,size | grep -Ev "boot|rpmb|loop" | sed 's|\s\s*| |' | tac)"
-
-  newline_to_space BLOCK_DEVICE_SIZES
-  space_separated_to_array BLOCK_DEVICE_SIZES BLOCK_DEVICE_SIZES
-
-#  # DEBUG
-#  for i in "${BLOCK_DEVICE_SIZES[@]}"; do
-#    echo "<$i>"
-#  done
-#  exit
-}