From e8e5f89098b964c8f26a49ef7e4866479b5c9faa Mon Sep 17 00:00:00 2001
From: Ian MacLeod <ian@nevir.net>
Date: Mon, 4 Sep 2017 11:19:52 -0700
Subject: [PATCH] Introduce NVM_PREFER_LOCAL_BINS

Prepends `$(npm bin)` on `$PATH` whenever cding into directories with `package.json` (or anywhere up the tree)
---
 README.md          | 11 +++++++++++
 zsh-nvm.plugin.zsh | 24 ++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/README.md b/README.md
index 3899b8a..88f71be 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,17 @@ export NVM_AUTO_USE=true
 antigen bundle lukechilds/zsh-nvm
 ```
 
+### Local bins
+
+If your projects include dependencies with binaries, this ensures that they take precedence on your `$PATH` over globally installed ones.
+
+For example, if you are using antigen, you would put the following in your `.zshrc`:
+
+```shell
+export NVM_PREFER_LOCAL_BINS=true
+antigen bundle lukechilds/zsh-nvm
+```
+
 ## Installation
 
 ### Using [Antigen](https://github.com/zsh-users/antigen)
diff --git a/zsh-nvm.plugin.zsh b/zsh-nvm.plugin.zsh
index 83967b7..68ec0fd 100644
--- a/zsh-nvm.plugin.zsh
+++ b/zsh-nvm.plugin.zsh
@@ -195,6 +195,27 @@ _zsh_nvm_install_wrapper() {
   esac
 }
 
+_zsh_nvm_add_local_bin_path() {
+  local nearest_package=$(nvm_find_up package.json)
+  # Skip if we're moving within a project (npm bin is slow).
+  #
+  # Also notice that we prepend a value in front of the variable so that it
+  # isn't expanded by %~ prompts.
+  [[ "z$nearest_package" == "$NVM_CURRENT_PACKAGE_PATH" ]] && return
+  NVM_CURRENT_PACKAGE_PATH=z$nearest_package
+
+  # Ensure a clean slate; so that we are not prepending paths forever.
+  if [[ -n "$NVM_PATH_WITHOUT_LOCAL_BINS" ]]; then
+    PATH=$NVM_PATH_WITHOUT_LOCAL_BINS
+    unset NVM_PATH_WITHOUT_LOCAL_BINS
+  fi
+
+  if [[ -n "$nearest_package" ]]; then
+    NVM_PATH_WITHOUT_LOCAL_BINS=$PATH
+    PATH=$(npm bin):$PATH
+  fi
+}
+
 # Don't init anything if this is true (debug/testing only)
 if [[ "$ZSH_NVM_NO_LOAD" != true ]]; then
 
@@ -209,6 +230,9 @@ if [[ "$ZSH_NVM_NO_LOAD" != true ]]; then
 
     # Auto use nvm on chpwd
     [[ "$NVM_AUTO_USE" == true ]] && add-zsh-hook chpwd _zsh_nvm_auto_use && _zsh_nvm_auto_use
+
+    # Ensure that local bins take precedence on $PATH.
+    [[ "$NVM_PREFER_LOCAL_BINS" == true ]] && add-zsh-hook chpwd _zsh_nvm_add_local_bin_path && _zsh_nvm_add_local_bin_path
   fi
 
 fi