checkin work so far on new install script

scripts/InstallScripts/InstallPrawnOS.sh

@@ -19,23 +19,91 @@
 # You should have received a copy of the GNU General Public License
 # along with PrawnOS.  If not, see <https://www.gnu.org/licenses/>.
 
-RESOURCES=/InstallResources
-# Grab the boot device, which is either /dev/sda for usb or /dev/mmcblk0 for an sd card
-BOOT_DEVICE=$(mount | head -n 1 | cut -d '2' -f 1)
+main() {
 
-#The currently booted device is $BOOT_DEVICE
+    RESOURCES=/InstallResources
+    # Grab the boot device, which is either /dev/sda for usb or /dev/mmcblk0 for an sd card
+    BOOT_DEVICE=$(mount | head -n 1 | cut -d '2' -f 1)
+
+    echo "Expand or Install?"
+    echo "Expand in place to fill the entire booted external device"
+    echo "Install to another internal or external device besides the one we are booted from"
+    echo "Installation allow for root encryption to be setup, but must target a external or internal device other than the currently booted device"
+    echo "The currently booted device is ${BOOT_DEVICE}"
+    while true; do
+        read -p "[I]nstall or [E]xpand?" IE
+        case $IE in
+            [Ii]* ) install; break;;
+            [Ee]* ) expand; break;;
+            * ) echo "Please answer I or E";;
+        esac
+    done
+
+}
+
+#Now to pick the install target: internal, sd, or usb
+#if target is usb, and boot device is usb, target is sdb
+#and whether to enable crypto
+install() {
+
+    echo "Pick an install target. This can be the Internal Emmc, an SD card, or a USB device"
+    echo "Please ensure you have only have the booted device and the desired target device inserted."
+    echo "The currently booted device is ${BOOT_DEVICE}"
+    while true; do
+        read -p "[I]nternal Emmc, [S]D card, or [U]SB device?" ISU
+        case $IE in
+            [Ii]* ) $TARGET=/dev/mmcblk2; break;;
+            [Ss]* ) $TARGET=/dev/mmcblk0; break;;
+            [Uu]* ) $TARGET=USB; break;;
+            * ) echo "Please answer I, S, or U";;
+        esac
+    done
+
+    if [[ $TARGET == "USB" ]]
+    then
+        if [[ $BOOT_DEVICE == "/dev/sda" ]]
+        then
+            $TARGET=/dev/sdb
+        else
+            $TARGET=/dev/sda
+        fi
+    fi
+    if [[ $TARGET == $BOOT_DEVICE ]]
+    then
+        echo "Can't install to booted device, please ensure you have only have the booted device and one single other inserted"
+        exit
+    fi
+
+    #Now on to the installation, basically copy InstallToInternal.sh
+
+}
+
+#simply expand to fill the current boot device
+expand() {
+
+    if [[ $BOOT_DEVICE == "/dev/mmcblk2" ]]
+    then
+        echo "Can't expand to fill internal emmc, install will have done this already"
+        exit
+    fi
+
+    #Make the boot partition fille the whole drive
+    #Delete the partition
+    sgdisk -d 2 $BOOT_DEVICE
+    #Make new partition map entry, with full size
+    sgdisk -N 2 $BOOT_DEVICE
+    #Set the type to "data"
+    sgdisk -t 2:0700 $BOOT_DEVICE
+    #Name it "properly" - Probably not required, but looks nice
+    sgdisk -c 2:Root $BOOT_DEVICE
+    #Reload the partition mapping
+    partprobe $BOOT_DEVICE
+    #Force the filesystem to fill the new partition
+    resize2fs -f ${BOOT_DEVICE}p2
+    echo "/dev/${BOOT_DEVICE}p2 / ext4 defaults,noatime 0 1" > /etc/fstab
+
+}
 
 
-echo "Expand or Install?"
-echo "Expand in place to fill the entire booted external device"
-echo "Install to another internal or external device besides the one we are booted from"
-echo "Installation allow for root encryption to be setup, but must target a external or internal device other than the currently booted device"
-echo "The currently booted device is $BOOT_DEVICE"
-while true; do
-    read -p "[I]nstall or [E]xpand?" IE
-    case $IE in
-        [Ii]* ) METHOD=INSTALL; break;;
-        [Ee]* ) METHOD=EXPAND; break;;
-        * ) echo "Please answer I or E";;
-    esac
-done
+#call the main function, script technically starts here
+main "$@"; exit