Add installation script

install.sh

@@ -0,0 +1,33 @@
+#! /usr/bin/env sh
+
+THEME='poly-light'
+
+echo 'Fetching theme archive'
+wget https://github.com/shvchk/$THEME/archive/master.zip
+
+echo 'Unpacking theme'
+unzip master.zip
+
+echo 'Creating GRUB themes directory'
+sudo mkdir -p /boot/grub/themes/$THEME
+
+echo 'Copying theme to GRUB themes directory'
+sudo cp -r $THEME-master/* /boot/grub/themes/$THEME
+
+echo 'Removing other themes from GRUB config'
+sudo sed -i '/^GRUB_THEME=/d' /etc/default/grub
+
+echo 'Removing empty lines at the end of GRUB config' # optional
+sudo sed -i -e :a -e '/^\n*$/{$d;N;};/\n$/ba' /etc/default/grub
+
+echo 'Adding new line to GRUB config just in case' # optional
+echo | sudo tee -a /etc/default/grub
+
+echo 'Adding theme to GRUB config'
+echo "GRUB_THEME=/boot/grub/themes/$THEME/theme.txt" | sudo tee -a /etc/default/grub
+
+echo 'Updating GRUB'
+sudo update-grub
+
+echo 'Removing theme installation files'
+rm -rf master.zip $THEME-master