Add PyCalc installation script

calcsetup.sh

@@ -0,0 +1,41 @@
+# This script will fetch necessary packages
+# Note: An Internet connection is REQUIRED for this script to succeed.
+
+read -e -n 1 -p "Do you have an Internet connection? " ans
+if [ $ans == "n" ]; then
+  echo -e "\e[31mPlease connect to the Internet and rerun this command. \e[39m"
+  echo "Exiting..."
+  sleep .5
+  exit 1
+fi
+
+read -e -n 1 -p "Are you running Raspbian Stretch Lite? " ans
+if [ &ans == "n" ]; then
+  echo -e "\e[33m\e[1mThis script is useful only in Raspbian Lite."
+  echo -e "Running this in the full Raspbian desktop is untested and will likely break.\e[39m\e[0m"
+  read -e -n 1 -p "Do you still want to try? " ans
+  if [ $ans == "n" ]; then
+    echo "Exiting..."
+    sleep .5
+    exit 2
+  fi
+fi
+
+read -e -n 1 -p "Have you changed the default username or password? " ans
+if [ $ans == "y" ]; then
+  sudo apt update
+else
+  echo raspberry | sudo -S apt update
+fi
+
+sudo apt install xorg ratpoison idle3 python3-matplotlib -y
+
+if [[ -e ~/.xinitrc ]]; then
+  echo "xinitrc exists... skipping"
+else
+  cp /etc/X11/xinit/xinitrc ~/.xinitrc
+fi
+
+# Copy X11 and ratpoison skeleton files to PATH
+echo "exec /usr/bin/ratpoison" >> ~/.xinitrc
+echo "exec /usr/bin/idle3" >> ~/.ratpoisonrc