Allow setting path to nvm install dir.

- same behavior as the two lines the nvm install script puts in bashrc
- set NVM_DIR to path where nvm is installed
- allows for global installs in /opt or /usr/local

plugins/nvm/_nvm

@@ -1,7 +1,7 @@
 #compdef nvm
 #autoload
 
-[[ -s ~/.nvm/nvm.sh ]] || return 0
+[[ -s "${NVM_DIR:=~/.nvm}" ]] || return 0
 
 local -a _1st_arguments
 _1st_arguments=(

plugins/nvm/nvm.plugin.zsh

@@ -1,3 +1,4 @@
 # The addition 'nvm install' attempts in ~/.profile
 
-[[ -s ~/.nvm/nvm.sh ]] && . ~/.nvm/nvm.sh
+NVM_DIR="${NVM_DIR:=~/.nvm}"
+[[ -s "${NVM_DIR}/nvm.sh" ]] && . "${NVM_DIR}/nvm.sh"