Add install instruction for nodejs and vim-language-server

docs/Nvim_setup.sh

@@ -86,6 +86,40 @@ else
     done
 fi
 
+#######################################################################
+#                Install node and vim-language-server                 #
+#######################################################################
+NODE_DIR=$HOME/tools/nodejs
+NODE_SRC_NAME=$HOME/packages/nodejs.tar.gz
+NODE_LINK="https://nodejs.org/dist/v14.15.4/node-v14.15.4-linux-x64.tar.xz"
+
+mkdir -p $HOME/tools
+# extract node to a custom directory, the directory should exist.
+tar xvf node-v14.15.4-linux-x64.tar.xz --directory=$HOME/tools
+
+if [[ -z "$(command -v node)" ]]; then
+    echo "Install Nodejs"
+    if [[ ! -f $NODE_SRC_NAME ]]; then
+        echo "Downloading nodejs and renaming"
+        wget $NODE_LINK -O "$NODE_SRC_NAME"
+    fi
+
+    if [[ ! -d "$NODE_DIR" ]]; then
+        echo "Creating nodejs directory under tools directory"
+        mkdir -p "$NODE_DIR"
+        echo "Extracting to $HOME/tools/nodejs directory"
+        tar zxvf "$NODE_SRC_NAME" -C "$NODE_DIR" --strip-components 1
+    fi
+
+    if [[ "$ADD_TO_SYSTEM_PATH" = true ]] && [[ "$USE_BASH_SHELL" = true ]]; then
+        echo "export PATH=\"$NVIM_DIR/bin:\$PATH\"" >> "$HOME/.bash_profile"
+    fi
+else
+    echo "Nodejs is already installed. Skip installing it."
+fi
+
+# Install vim-language-server
+$NODE_DIR/bin/npm install -g vim-language-server
 
 #######################################################################
 #                            Ripgrep part                             #

docs/README.md

@@ -29,6 +29,44 @@ linting, go to definition, etc.
 pip install 'python-lsp-server[all]' pylsp-mypy pyls-isort
 ```
 
+## Node
+
+We need to install node.js from [here](https://nodejs.org/en/download/):
+
+```bash
+# Ref: https://johnpapa.net/node-and-npm-without-sudo/
+wget https://nodejs.org/dist/v14.15.4/node-v14.15.4-linux-x64.tar.xz
+
+mkdir -p $HOME/tools
+# extract node to a custom directory, the directory should exist.
+tar xvf node-v14.15.4-linux-x64.tar.xz --directory=$HOME/tools
+```
+
+Then add the following config to `.bash_profile` or `.zshrc`
+
+```bash
+export PATH="$HOME/tools/node-v14.15.4-linux-x64/bin:$PATH"
+```
+
+Source the file:
+
+```bash
+source ~/.bash_profile
+# source ~/.zshrc
+```
+
+## vim-language-server
+
+[vim-language-server](https://github.com/iamcco/vim-language-server) provides
+completion for vim script. We can install vim-language-server globally and set
+its path:
+
+```bash
+npm install -g vim-language-server
+
+export PATH="$HOME/.npm-packages/bin:$PATH"
+```
+
 ## Git
 
 Git is used by the plugin manager packer.nvim to download plugins from GitHub