Add support for nodenv

Author: shaun-floss

fish_prompt.fish

@@ -861,13 +861,31 @@ function __bobthefish_prompt_desk -S -d 'Display current desk environment'
 end
 
 function __bobthefish_prompt_nvm -S -d 'Display current node version through NVM'
-    [ "$theme_display_nvm" = 'yes' -a -n "$NVM_DIR" ]
-    or return
+    [ "$theme_display_nvm" = 'no' ]
+    and return
 
-    set -l node_version (nvm current 2> /dev/null)
+    set -l node_version
+    if type -fq nvm
+        set node_version (nvm current 2> /dev/null)
 
-    [ -z $node_version -o "$node_version" = 'none' -o "$node_version" = 'system' ]
-    and return
+        [ -z $node_version -o "$node_version" = 'none' -o "$node_version" = 'system' ]
+        and return
+    else if type -fq nodenv
+        set node_version (nodenv version-name)
+
+        # Don't show global node version...
+        set -q NODENV_ROOT
+        or set -l NODENV_ROOT $HOME/.nodenv
+
+        [ -e "$NODENV_ROOT/version" ]
+        and read -l global_node_version < "$NODENV_ROOT/version"
+
+        [ "$global_node_version" ]
+        or set -l global_node_version system
+
+        [ "$node_version" = "$global_node_version" ]
+        and return
+    end
 
     __bobthefish_start_segment $color_nvm
     echo -ns $node_glyph $node_version ' '