various additions from sim laptop

plugins/nvm/nvm.plugin.zsh

@@ -0,0 +1,33 @@
+typeset -a chpwd_functions __chromaz_extra_left
+
+export NVM_DIR="$HOME/.nvm"
+nvm() {
+	[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+	nvm "$@"
+}
+_prompt_nvm_version() {
+	[[ -z $NVM_BIN ]] && return
+	echo "nvm: ${NVM_BIN:h:t}"
+}
+__chromaz_extra_left+=_prompt_nvm_version
+
+find-nvmrc-version() {
+	local dir=${1:-${PWD:a}}
+	if [[ $dir == / ]]; then return 1; fi
+	if [[ -e $dir/.nvmrc ]]; then
+		< $dir/.nvmrc
+	else
+		find-nvmrc-version ${dir:h}
+	fi
+}
+
+chpwd-set-nvm() {
+	if vers=$(find-nvmrc-version); then
+		if [[ $vers != ${NVM_BIN:h:t} ]]; then
+			nvm use
+		fi
+	fi
+}
+chpwd-set-nvm &>/dev/null
+
+chpwd_functions+=chpwd-set-nvm