From 96fa6aab57ee27bd2a854510b5d849aa30e914bc Mon Sep 17 00:00:00 2001
From: Luke Childs <lukechilds123@gmail.com>
Date: Mon, 25 Jul 2016 19:03:00 +0100
Subject: [PATCH] Store previous nvm version when upgrading

---
 .gitignore         | 1 +
 zsh-nvm.plugin.zsh | 3 +++
 2 files changed, 4 insertions(+)
 create mode 100644 .gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..490dc76
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+previous_version
diff --git a/zsh-nvm.plugin.zsh b/zsh-nvm.plugin.zsh
index 99e5029..515377e 100644
--- a/zsh-nvm.plugin.zsh
+++ b/zsh-nvm.plugin.zsh
@@ -1,3 +1,5 @@
+ZSH_NVM_DIR=${0:a:h}
+
 [[ -z "$NVM_DIR" ]] && NVM_DIR="$HOME/.nvm"
 
 _zsh_nvm_rename_function() {
@@ -63,6 +65,7 @@ _zsh_nvm_upgrade() {
     echo "You're already up to date"
   else
     echo "Updating to $latest_version..."
+    echo "$installed_version" > "$ZSH_NVM_DIR/previous_version"
     $(cd "$NVM_DIR" && git fetch --quiet && git checkout "$latest_version")
     _zsh_nvm_load
   fi