Add global .gitignore prompt to the installer

Author: marcusirgens

README.md

@@ -31,7 +31,7 @@ Clone this repository into your Magento folder. Remember not to commit it.
 
 You can also do this, athough you shouldn't. It will install it under `./script_runner`.
 ```shell script
-sh -c "$(curl -SsfL https://raw.githubusercontent.com/marcusirgens/magento2-script-runner/main/install.sh)"
+bash -c "$(curl -SsfL https://raw.githubusercontent.com/marcusirgens/magento2-script-runner/main/install.sh)"
 ```
 
 If you're in your Magento 2 application directory at `/my/code/folder`,

install.sh

@@ -1,6 +1,25 @@
-#!/bin/sh
+#!/bin/bash
+# Simple installer for the script runner
 
-set -eux
+# https://www.davidpashley.com/articles/writing-robust-shell-scripts/
+set -eu
 
+# Clone and remove git directory
+# https://stackoverflow.com/a/11498124/9738360
 git clone --depth=1 --branch=main git@github.com:marcusirgens/magento2-script-runner.git ./script_runner
 rm -rf ./script_runner/.git
+
+# Get the global gitignore
+global_ignore="$(git config --global --get core.excludesfile)"
+
+# If that file does not exist, don't do anything.
+if [ -n "$global_ignore" ]; then
+    if ! grep -Eq '^script_runner.*' "$global_ignore"; then
+        # https://stackoverflow.com/questions/1885525/how-do-i-prompt-a-user-for-confirmation-in-bash-script
+        read -p "Do you want to add script_runner/* to your global .gitignore file? [y/n]" -n 1 -r
+        echo    # (optional) move to a new line
+        if [[ $REPLY =~ ^[Yy]$ ]]; then
+            echo "script_runner/*" >> "$global_ignore"
+        fi
+    fi
+fi