Add nvm as a plugin

conf.d/nvm.fish

@@ -0,0 +1,28 @@
+set --query XDG_DATA_HOME || set --local XDG_DATA_HOME ~/.local/share
+set --query nvm_mirror || set --global nvm_mirror https://nodejs.org/dist
+set --query nvm_data || set --global nvm_data $XDG_DATA_HOME/nvm
+
+function _nvm_install --on-event nvm_install
+    test ! -d $nvm_data && command mkdir -p $nvm_data
+    echo "Downloading the Node distribution index..." 2>/dev/null
+    _nvm_index_update
+end
+
+function _nvm_update --on-event nvm_update
+    set --query --universal nvm_data && set --erase --universal nvm_data
+    set --query --universal nvm_mirror && set --erase --universal nvm_mirror
+    set --query nvm_mirror || set --global nvm_mirror https://nodejs.org/dist
+end
+
+function _nvm_uninstall --on-event nvm_uninstall
+    command rm -rf $nvm_data
+
+    set --query nvm_current_version && _nvm_version_deactivate $nvm_current_version
+
+    set --names | string replace --filter --regex -- "^nvm" "set --erase nvm" | source
+    functions --erase (functions --all | string match --entire --regex -- "^_nvm_")
+end
+
+if status is-interactive && set --query nvm_default_version && ! set --query nvm_current_version
+    nvm use --silent $nvm_default_version
+end