Improve Bash alias

This will take into account nested directories inside your main project
directory

README.md

@@ -386,30 +386,59 @@ If you prefer a lighter-weight solution, the recipes below have been contributed
 Put the following at the end of your `$HOME/.bashrc`:
 
 ```bash
+find-up () {
+    path=$(pwd)
+    while [[ "$path" != "" && ! -e "$path/$1" ]]; do
+        path=${path%/*}
+    done
+    echo "$path"
+}
+
 cdnvm(){
-  cd $@
-  if [[ -f .nvmrc && -s .nvmrc && -r .nvmrc ]]; then
-    <.nvmrc nvm install;
-  elif [[ $(nvm current) != $(nvm version default) ]]; then
-    nvm use default;
-  fi
+    cd $@;
+    nvm_path=$(find-up .nvmrc | tr -d '[:space:]')
+
+    # If there are no .nvmrc file, use the default nvm version
+    if [[ ! $nvm_path = *[^[:space:]]* ]]; then
+
+        declare default_version;
+        default_version=$(nvm version default);
+
+        # If there is no default version, set it to `node`
+        # This will use the latest version on your machine
+        if [[ $default_version == "N/A" ]]; then
+            nvm alias default node;
+            default_version=$(nvm version default);
+        fi
+
+        # If the current version is not the default version, set it to use the default version
+        if [[ $(nvm current) != "$default_version" ]]; then
+            nvm use default;
+        fi
+
+        elif [[ -s $nvm_path/.nvmrc && -r $nvm_path/.nvmrc ]]; then
+        declare nvm_version
+        nvm_version=$(<"$nvm_path"/.nvmrc)
+
+        # Add the `v` suffix if it does not exists in the .nvmrc file
+        if [[ $nvm_version != v* ]]; then
+            nvm_version="v""$nvm_version"
+        fi
+
+        # If it is not already installed, install it
+        if [[ $(nvm ls "$nvm_version" | tr -d '[:space:]') == "N/A" ]]; then
+            nvm install "$nvm_version";
+        fi
+
+        if [[ $(nvm current) != "$nvm_version" ]]; then
+            nvm use "$nvm_version";
+        fi
+    fi
 }
 alias cd='cdnvm'
 ```
 
-This alias would automatically detect a `.nvmrc` file in the directory you're `cd`ing into, and switch to that version. And when you `cd` back, it will automatically switch back to the `default` version.
-
-If you prefer one-liners:
-
-```
-alias cd='cdnvm(){ cd $@; if [[ -f .nvmrc && -s .nvmrc && -r .nvmrc ]]; then <.nvmrc nvm install; elif [[ $(nvm current) != $(nvm version default) ]]; then nvm use default; fi; };cdnvm'
-```
-
-You may also run this directly on your terminal:
-
-```bash
-$ echo 'alias cd='\''cdnvm(){ cd $@; if [[ -f .nvmrc && -s .nvmrc && -r .nvmrc ]]; then <.nvmrc nvm install; elif [[ $(nvm current) != $(nvm version default) ]]; then nvm use default; fi; };cdnvm'\''' >> ~/.bashrc
-```
+This alias would search 'up' from your current directory in order to detect a `.nvmrc` file. If it finds it, it will switch to that version; if not, it will use the default version.
 
 #### zsh