Update script to install file

manual_install.sh

@@ -1,9 +1,64 @@
 #!/usr/bin/env bash
 
-mkdir -p ~/.vim/
+exit_whit_error_message() {
+  printf '%s\n' "$1" >&2
+  exit 1
+}
 
-for INSTALL_DIR in autoload compiler ftdetect ftplugin indent syntax
-do
-  cp -R ${INSTALL_DIR} ~/.vim/
+show_help() {
+  echo "The script to install the vim-elixir plugin"
+  echo
+  echo "Usage: ./manual_install.sh [OPTIONS]"
+  echo 
+  echo "Options:"
+  echo "-o, --output-dir string  The name of the directory where plugin will be installed. By default the output directory name is 'vim-elixir'"
+  echo "  Example: ./manual_install.sh -o vim-elixir   # The plugin will be installed in ~/.vim/pack/vim-elixir/start/vim-elixir directory"
+  echo "           ./manual_install.sh -o elixir-opts  # The plugin will be installed in ~/.vim/pack/elixir-opts/start/elixir-opts directory"
+  echo
+}
+
+# Initialize all the option variables.
+# This ensures we are not contaminated by variables from the environment.
+VIM_PLUGIN_NAME=vim-elixir
+
+while :; do
+  case $1 in
+    -h|-\?|--help)
+      show_help
+      exit
+      ;;
+    -o|--output-dir)
+      if [ "$2" ]; then
+        VIM_PLUGIN_NAME=$2
+        shift
+      else
+        exit_whit_error_message 'ERROR: "--name" requires a non-empty option argument.'
+      fi
+      ;;
+    --output-dir=?*)
+       # Delete everything up to "=" and assign the remainder.
+      VIM_PLUGIN_NAME=${1#*=}
+      ;;
+    --output-dir=) # Handle the case of an empty --name=
+      exit_whit_error_message 'ERROR: "--name" requires a non-empty option argument.'
+      ;;
+    -?*)
+      printf 'WARN: Unknown option (ignored): %s\n' "$1" >&2
+      ;;
+    *)
+      # Default case: No more options, so break out of the loop.
+      break
+  esac
+
+  shift
 done
 
+VIM_INSTALL_DIR=~/.vim/pack/$VIM_PLUGIN_NAME/start/$VIM_PLUGIN_NAME
+
+mkdir -p $VIM_INSTALL_DIR
+
+echo "Installing plugin in the ${VIM_INSTALL_DIR} directory"
+for DIR in autoload compiler ftdetect ftplugin indent syntax
+do
+  cp -R $DIR $VIM_INSTALL_DIR
+done