Merge 09c4fcfbed1d52857a4c90fade31f18058f5bf9b into 4beab63631764fc381a0e56273faf8d43b8f9509

Fixes #3402

README.md

@@ -100,6 +100,8 @@ nvm is a version manager for [node.js](https://nodejs.org/en/), designed to be i
 
 ### Install & Update Script
 
+**If you use macOS, you must install Xcode and agree to the Xcode License before you install nvm.**
+
 To **install** or **update** nvm, you should run the [install script][2]. To do that, you may either download and run the script manually, or use the following cURL or Wget command:
 ```sh
 curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.0/install.sh | bash
@@ -108,7 +110,7 @@ curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.0/install.sh | bash
 wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.0/install.sh | bash
 ```
 
-Running either of the above commands downloads a script and runs it. The script clones the nvm repository to `~/.nvm`, and attempts to add the source lines from the snippet below to the correct profile file (`~/.bash_profile`, `~/.zshrc`, `~/.profile`, or `~/.bashrc`).
+Running either of the above commands downloads a script and runs it. The script clones the nvm repository to `~/.nvm`, and attempts to add the source lines from the snippet below to the correct profile file (`~/.bash_profile`, `~/.zshrc`, `~/.profile`, or `~/.bashrc`). **If you don't have a profile file in your home dir, you'll need to add the appropriate one before you run the script.**
 
 <a id="profile_snippet"></a>
 ```sh

nvm.sh

@@ -503,9 +503,9 @@ $(nvm_wrap_with_color_code 'y' "${warn_text}")"
 }
 
 nvm_process_nvmrc() {
-  local NVMRC_PATH="$1"
+  local NVMRC_PATH
+  NVMRC_PATH="$1"
   local lines
-  local unpaired_line
 
   lines=$(command sed 's/#.*//' "$NVMRC_PATH" | command sed 's/^[[:space:]]*//;s/[[:space:]]*$//' | nvm_grep -v '^$')
 
@@ -515,8 +515,12 @@ nvm_process_nvmrc() {
   fi
 
   # Initialize key-value storage
-  local keys=''
+  local keys
-  local values=''
+  keys=''
+  local values
+  values=''
+  local unpaired_line
+  unpaired_line=''
 
   while IFS= read -r line; do
     if [ -z "${line}" ]; then