From a2a56036dabf75b14f21566be95efbacffacb34f Mon Sep 17 00:00:00 2001
From: Alex Ilyaev <alexilyaev@gmail.com>
Date: Tue, 27 Aug 2019 17:48:28 +0300
Subject: [PATCH] Abort if current and target Node versions are the same
 (closes #78)

---
 bin/avn.sh | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/bin/avn.sh b/bin/avn.sh
index 6c18f87..2741347 100644
--- a/bin/avn.sh
+++ b/bin/avn.sh
@@ -47,9 +47,18 @@ function __avn_chpwd() {
   local file=$(__avn_find_file)
   local dir=${file%/*}
   local name=${file##*/}
+  local VERSION_REGEX="[0-9]+\.[0-9]+\.[0-9]+"
+
+  if [[ -n "$file" ]] && [[ "$file" != "$__avn_active_file" ]]; then
+    [[ $(node -v) =~ $VERSION_REGEX ]] && currentNodeVersion=${BASH_REMATCH}
+    [[ $(head -n 1 $file) =~ $VERSION_REGEX ]] && targetNodeVersion=${BASH_REMATCH}
+
+    # Abort if the current and target node versions are the same
+    # https://github.com/wbyoung/avn/issues/78
+    [[ $currentNodeVersion == $targetNodeVersion ]] && return 0
 
-  [[ -n "$file" ]] && [[ "$file" != "$__avn_active_file" ]] &&
     __avn_eval chpwd "$dir" "$name" || true
+  fi
 
   __avn_active_file=$file