Add NVM_LAZY_LOAD_EXTRA_COMMANDS option (#67)

Author: joerideg

README.md

@@ -108,6 +108,17 @@ Performance comparison:
 ( _zsh_nvm_lazy_load; )  0.01s user 0.01s system 168% cpu 0.012 total
 ```
 
+#### Extra commands to trigger lazy loading
+By default lazy loading nvm is triggered by running the `nvm`, `node`, `npm` commands or any installed npm global binaries.
+If you want to trigger the lazy loading via extra arbitrary commands you can define `NVM_LAZY_LOAD_EXTRA_COMMANDS` and set it to an array of commands as strings.
+This can be usefull if programs are not in the above list of binaries but do depend on the availability of `node`, e.g. a vim plugin.
+
+```shell
+export NVM_LAZY_LOAD_EXTRA_COMMANDS=('vim')
+vim --version
+#node is now loaded
+```
+
 ### Don't autoload node
 
 By default when `nvm` is loaded it'll automatically run `nvm use default` and load your default `node` version along with `npm` and any global modules. You can disable this behaviour by exporting the `NVM_NO_USE` environment variable and setting it to `true`. It must be set before `zsh-nvm` is loaded.

tests/options/NVM_LAZY_LOAD_EXTRA_COMMANDS

@@ -0,0 +1,39 @@
+#!/bin/sh
+source ../common.sh
+
+# Node.js version to install
+node_version=v5.11.0
+
+# Load zsh-nvm and install Node.js in subshell
+(load_zsh_nvm && nvm install "$node_version" && [[ "$(node --version)" == "$node_version" ]]) || die "node wasn't installed"
+
+# Check node isn't available
+[[ "$(node --version)" != "$node_version" ]] || die "node shouldn't be available $(node --version)"
+
+# Set NVM_LAZY_LOAD to true
+export NVM_LAZY_LOAD=true
+export NVM_LAZY_LOAD_EXTRA_COMMANDS=('hostname' 'whoami')
+
+# Load zsh-nvm
+load_zsh_nvm
+
+# Check nvm is a lazy load function
+[[ $(which nvm) == *"_zsh_nvm_load"* ]] || die "nvm should be a lazy load function"
+
+# Check node is a lazy load function
+[[ $(command -v node) == "node" ]] || die "node should be a shell function"
+
+# Check npm is a lazy load function
+[[ $(command -v npm) == "npm" ]] || die "npm should be a shell function"
+
+# Init lazy loader
+whoami || die "couldn't run lazy loader"
+
+# Check nvm is not a lazy load function
+[[ $(which nvm) != *"_zsh_nvm_load"* ]] || die "nvm should not be a lazy load function"
+
+# Check node is a binary
+[[ "$(command -v node)" == "$(nvm_version_path $node_version)/bin/node" ]] || die "node should now be a binary"
+
+# Check npm is a binary
+[[ "$(command -v npm)" == "$(nvm_version_path $node_version)/bin/npm" ]] || die "npm should now be a binary"

zsh-nvm.plugin.zsh

@@ -93,6 +93,7 @@ _zsh_nvm_lazy_load() {
 
   # Add nvm
   global_binaries+=('nvm')
+  global_binaries+=($NVM_LAZY_LOAD_EXTRA_COMMANDS)
 
   # Remove any binaries that conflict with current aliases
   local cmds