From 7b3954dda7084362043a87ea4dacaede3d5b41ec Mon Sep 17 00:00:00 2001
From: Alexandre Nicastro <kryndex@gmail.com>
Date: Fri, 6 Oct 2017 23:28:43 -0300
Subject: [PATCH] Stop error "permission denied: /npm_completion"

---
 plugins/npm/npm.plugin.zsh | 39 ++++++++++++++++++++++++++++++++++----
 1 file changed, 35 insertions(+), 4 deletions(-)

diff --git a/plugins/npm/npm.plugin.zsh b/plugins/npm/npm.plugin.zsh
index 43aedc36d..e76fcd66e 100644
--- a/plugins/npm/npm.plugin.zsh
+++ b/plugins/npm/npm.plugin.zsh
@@ -1,12 +1,44 @@
 (( $+commands[npm] )) && {
+  
+  # Check if ZSH_CACHE_DIR is set.
+  # If not, proceeds to find any existing directories containing npm_completion.
+  # If can't find any, defaults to ZSH_CACHE_DEFAULT_DIR and sets ZSH_CACHE_DIR accordingly.
+  if [ !${ZSH_CACHE_DIR} ]; then
+    
+    # Default cache directory in case none was found containing npm_completion file.
+    ZSH_CACHE_DEFAULT_DIR="${HOME}/.oh-my-zsh/cache"
+
+    # List of directories to look for npm_completion file.
+    ZSH_CACHE_POSSIBLE_DIR=(
+      "${HOME}/.oh-my-zsh/cache"
+      "${HOME}/.zsh/cache"
+      "${HOME}/.antigen/bundles/robbyrussell/oh-my-zsh/cache"
+      "${HOME}/.tmp/cache"
+      )
+    
+    # Loop list of possible cache directories containing npm_completion file
+    # and set ZSH_CACHE_DIR to the first found.
+    for d in "${ZSH_CACHE_POSSIBLE_DIR[@]}"; do
+      # Exits loop if previous iteration already found an existing ${d}/npm_completion
+      # & already set ZSH_CACHE_DIR to ${d}.
+      [ ${ZSH_CACHE_DIR} ] && break
+
+      # If current exists then sets ZSH_CACHE_DIR to it
+      [ -f "${d}/npm_completion" ] && ZSH_CACHE_DIR=${d}
+    done
+
+    # If ZSH_CACHE_DIR still not set, then set to ZSH_CACHE_DEFAULT_DIR.
+    [ -z ${ZSH_CACHE_DIR} ] && ZSH_CACHE_DIR=${ZSH_CACHE_DEFAULT_DIR}
+  fi
+
     __NPM_COMPLETION_FILE="${ZSH_CACHE_DIR}/npm_completion"
 
-    if [[ ! -f $__NPM_COMPLETION_FILE ]]; then
+    if [ ! -f $__NPM_COMPLETION_FILE ]; then
         npm completion >! $__NPM_COMPLETION_FILE 2>/dev/null
-        [[ $? -ne 0 ]] && rm -f $__NPM_COMPLETION_FILE
+        [ $? -ne 0 ] && rm -f $__NPM_COMPLETION_FILE
     fi
 
-    [[ -f $__NPM_COMPLETION_FILE ]] && source $__NPM_COMPLETION_FILE
+    [ -f $__NPM_COMPLETION_FILE ] && source $__NPM_COMPLETION_FILE
 
     unset __NPM_COMPLETION_FILE
 }
@@ -43,4 +75,3 @@ alias npmst="npm start"
 
 # Run npm test
 alias npmt="npm test"
-