add swapfile fix

scripts/0-preinstall.sh

@@ -69,12 +69,35 @@ echo -ne "
                     Creating Filesystems
 -------------------------------------------------------------------------
 "
+createswapfile() {
+    $SWAPFILE || return 0
+    if [[ "${FS}" == "ext4" ]]; then
+        local path=/opt/swap
+        mkdir -p /mnt$path # Put swap into the actual system, not into RAM disk, otherwise there is no point in it, it'll cache RAM into RAM. So, /mnt/ everything.
+        chattr +C /mnt$path #apply NOCOW, btrfs needs that.
+    else
+        local path=/swap
+        truncate -s 0 /mnt$path/swapfile
+        chattr +C /mnt$path/swapfile #apply NOCOW, btrfs needs that.
+        btrfs property set /mnt$path/swapfile compression none
+    fi  
+    dd if=/dev/zero of=/mnt$path/swapfile bs=1M count=4096 status=progress
+    chmod 600 /mnt$path/swapfile # set permissions.
+    chown root /mnt$path/swapfile
+    mkswap /mnt$path/swapfile
+    swapon /mnt$path/swapfile
+    # The line below is written to /mnt/ but doesn't contain /mnt/, since it's just / for the system itself.
+    echo "$path/swapfile	none	swap	sw	0	0" >> /mnt/etc/fstab # Add swap to fstab, so it KEEPS working after installation.
+    echo "vm.swappiness=10" >> /mnt/etc/sysctl.conf # Lower swappiness
+}
+
 createsubvolumes () {
     btrfs subvolume create /mnt/@
     btrfs subvolume create /mnt/@home
     btrfs subvolume create /mnt/@var
     btrfs subvolume create /mnt/@tmp
     btrfs subvolume create /mnt/@.snapshots
+    $SWAPFILE && btrfs subvolume create /mnt/@swap
 }
 
 mountallsubvol () {
@@ -82,6 +105,7 @@ mountallsubvol () {
     mount -o ${MOUNT_OPTIONS},subvol=@tmp ${partition3} /mnt/tmp
     mount -o ${MOUNT_OPTIONS},subvol=@var ${partition3} /mnt/var
     mount -o ${MOUNT_OPTIONS},subvol=@.snapshots ${partition3} /mnt/.snapshots
+    $SWAPFILE && mount -o ${MOUNT_OPTIONS},subvol=@swap,x-mount.mkdir ${partition3} /mnt/swap
 }
 
 subvolumesetup () {
@@ -110,10 +134,12 @@ if [[ "${FS}" == "btrfs" ]]; then
     mkfs.btrfs -L ROOT ${partition3} -f
     mount -t btrfs ${partition3} /mnt
     subvolumesetup
+    createswapfile
 elif [[ "${FS}" == "ext4" ]]; then
     mkfs.vfat -F32 -n "EFIBOOT" ${partition2}
     mkfs.ext4 -L ROOT ${partition3}
     mount -t ext4 ${partition3} /mnt
+    createswapfile
 elif [[ "${FS}" == "luks" ]]; then
     mkfs.vfat -F32 -n "EFIBOOT" ${partition2}
 # enter luks password to cryptsetup and format root partition
@@ -125,6 +151,7 @@ elif [[ "${FS}" == "luks" ]]; then
 # create subvolumes for btrfs
     mount -t btrfs ${partition3} /mnt
     subvolumesetup
+    createswapfile
 # store uuid of encrypted partition for grub
     echo ENCRYPTED_PARTITION_UUID=$(blkid -s UUID -o value ${partition3}) >> $CONFIGS_DIR/setup.conf
 fi
@@ -166,24 +193,6 @@ else
     pacstrap /mnt efibootmgr --noconfirm --needed
 fi
 echo -ne "
--------------------------------------------------------------------------
-                    Checking for low memory systems <8G
--------------------------------------------------------------------------
-"
-TOTAL_MEM=$(cat /proc/meminfo | grep -i 'memtotal' | grep -o '[[:digit:]]*')
-if [[  $TOTAL_MEM -lt 8000000 ]]; then
-    # Put swap into the actual system, not into RAM disk, otherwise there is no point in it, it'll cache RAM into RAM. So, /mnt/ everything.
-    mkdir -p /mnt/opt/swap # make a dir that we can apply NOCOW to to make it btrfs-friendly.
-    chattr +C /mnt/opt/swap # apply NOCOW, btrfs needs that.
-    dd if=/dev/zero of=/mnt/opt/swap/swapfile bs=1M count=2048 status=progress
-    chmod 600 /mnt/opt/swap/swapfile # set permissions.
-    chown root /mnt/opt/swap/swapfile
-    mkswap /mnt/opt/swap/swapfile
-    swapon /mnt/opt/swap/swapfile
-    # The line below is written to /mnt/ but doesn't contain /mnt/, since it's just / for the system itself.
-    echo "/opt/swap/swapfile	none	swap	sw	0	0" >> /mnt/etc/fstab # Add swap to fstab, so it KEEPS working after installation.
-fi
-echo -ne "
 -------------------------------------------------------------------------
                     SYSTEM READY FOR 1-setup.sh
 -------------------------------------------------------------------------

scripts/startup.sh

@@ -140,6 +140,25 @@ echo -ne "
 ------------------------------------------------------------------------
 "
 }
+swapfile() {
+  local TOTAL_MEM=$(cat /proc/meminfo | grep -i 'memtotal' | grep -o '[[:digit:]]*')
+  if [[ $TOTAL_MEM -lt 8000000 ]]; then
+    set_option SWAPFILE true
+  else
+    echo -ne "Add swap?
+    " 
+    options=("Yes" "No")
+    select_option $? 1 "${options[@]}"
+
+    case ${options[$?]} in
+        y|Y|yes|Yes|YES)
+        set_option SWAPFILE true;;
+        n|N|no|NO|No)
+        set_option SWAPFILE false;;
+        *) echo "Wrong option. Try again"; swapfile;;
+    esac
+  fi
+}
 filesystem () {
 # This function will handle file systems. At this movement we are handling only
 # btrfs and ext4. Others will be added in future.
@@ -323,6 +342,9 @@ logo
 diskpart
 clear
 logo
+swapfile
+clear
+logo
 filesystem
 clear
 logo