shemum

@@ -42,48 +42,75 @@ case $OS_NAME in
   ;;
 esac
 
+# Functions
+
+# Virtual machine removal
+remove_func function { 
+  rm -r $ROOT_PATH/$OS_NAME 
+}
+
+# Virtual machine start without a console
+start_func function {
+  qemu-system-x86_64 -boot c                            \
+                       -display none                    \
+                       -drive file=$IMG_PATH,format=raw \
+                       -m $RAM -smp $CPU
+}
+
+# Virtual machine start with a console
+console_func function {
+  qemu-system-x86_64 -boot c                    \
+                       -display curses            \
+                       -drive file=$IMG_PATH,format=raw \
+                       -m $RAM -smp $CPU
+}
+
+# Virtual machine initialization with a console
+init_func function {
+  mkdir -p "$ROOT_PATH/$OS_NAME"
+  qemu-img create $IMG_PATH $DISK_SIZE
+  if [ ! -f $ISO_PATH ] && [ ! -z $INSTALL_IMG ]; then
+    echo $INSTALL_IMG
+    curl -o $ISO_PATH $INSTALL_IMG
+  elif [ ! -z $INSTALL_IMG ]; then
+    echo "Current INSTALL_IMG for $OS_NAME: $ISO_PATH"
+  else:
+    echo "Install image path is missing" >&2
+    exit 1
+  fi
+  qemu-system-x86_64 -boot d                          \
+                    -display curses                   \
+                    -drive file=$ISO_PATH,media=cdrom \
+                    -drive file=$IMG_PATH,format=raw  \
+                    -m $RAM -smp $CPU
+}
+
+# Display usage
+usage_func function {
+  printf "Usage: shemum [init] <virtual machine name> <disk size>"
+  printf " init        initialize a virtual machine"
+  printf " start       start a QEMU virtual machine without console output"
+  printf " console     start a QEMU virtual machine with console output"
+  printf " remove      remove virtual machine directory and all it's contents"
+}
+
 # Options
 case $OPTION in
   # Initializes the VM and starts the installer image.
   "init")
-    mkdir -p "$ROOT_PATH/$OS_NAME"
+    init_func
-    qemu-img create $IMG_PATH $DISK_SIZE
-    if [ ! -f $ISO_PATH ] && [ ! -z $INSTALL_IMG ]; then
-      echo $INSTALL_IMG
-      curl -o $ISO_PATH $INSTALL_IMG
-    elif [ ! -z $INSTALL_IMG ]; then
-      echo "Current INSTALL_IMG for $OS_NAME: $ISO_PATH"
-    else:
-      echo "Install image path is missing" >&2
-      exit 1
-    fi
-    qemu-system-x86_64 -boot d                    \
-                      -display curses            \
-                      -drive file=$ISO_PATH,media=cdrom        \
-                      -drive file=$IMG_PATH,format=raw \
-                      -m $RAM -smp $CPU
   ;;
   "console")
-    qemu-system-x86_64 -boot c                    \
+    console_func
-                       -display curses            \
-                       -drive file=$IMG_PATH,format=raw \
-                       -m $RAM -smp $CPU
   ;;
   "start")
-    qemu-system-x86_64 -boot c                    \
+    start_func
-                       -display none                 \
-                       -drive file=$IMG_PATH,format=raw \
-                       -m $RAM -smp $CPU
   ;;
   "remove")
-    rm -r $ROOT_PATH/$OS_NAME
+    remove_func
   ;;
   *)
-    echo "Usage: shemum [init] <virtual machine name> <disk size>"
+    usage_func
-    echo " init        initialize a virtual machine"
-    echo " start       start a QEMU virtual machine without console output"
-    echo " console     start a QEMU virtual machine with console output"
-    echo " remove      remove virtual machine directory and all it's contents"
 esac