Move new loading code into reusable function

zsh-nvm.plugin.zsh

@@ -30,6 +30,27 @@ _zsh_nvm_install() {
   $(cd "$NVM_DIR" && git checkout --quiet "$(_zsh_nvm_latest_release_tag)")
 }
 
+_zsh_nvm_load() {
+
+  # Source nvm
+  source "$NVM_DIR/nvm.sh"
+
+  # Rename main nvm function
+  _zsh_nvm_rename_function nvm _zsh_nvm_nvm
+
+  # Wrap nvm in our own function
+  nvm() {
+    case $1 in
+      'upgrade')
+        _zsh_nvm_upgrade
+        ;;
+      *)
+        _zsh_nvm_nvm "$@"
+        ;;
+    esac
+  }
+}
+
 nvm_update() {
   echo 'Deprecated, please use `nvm upgrade`'
 }
@@ -43,31 +64,12 @@ _zsh_nvm_upgrade() {
   else
     echo "Updating to $latest_version..."
     $(cd "$NVM_DIR" && git fetch --quiet && git checkout "$latest_version")
-    source "$NVM_DIR/nvm.sh"
+    _zsh_nvm_load
   fi
 }
 
 # Install nvm if it isn't already installed
 [[ ! -f "$NVM_DIR/nvm.sh" ]] && _zsh_nvm_install
 
-# If nvm is installed
-if [[ -f "$NVM_DIR/nvm.sh" ]]; then
-
-  # Source nvm
-  source "$NVM_DIR/nvm.sh"
-
-  # Rename main nvm function
-  _zsh_nvm_rename_function nvm _zsh_nvm_nvm
-
-  # Wrap nvm in our own function
-  nvm() {
-    case $1 in
-      'upgrade')
-        _zsh_nvm_upgrade
-        ;;
-      *)
-        _zsh_nvm_nvm "$@"
-        ;;
-    esac
-  }
-fi
+# If nvm is installed, load it
+[[ -f "$NVM_DIR/nvm.sh" ]] && _zsh_nvm_load