Added Updater Script

Update_RetroDriven.sh

@@ -0,0 +1,92 @@
+#!/bin/bash
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Copyright 2019 Alessandro "Locutus73" Miele
+
+# You can download the latest version of this script from:
+# https://github.com/RetroDriven/MiSTer_UnofficialCores
+
+# RetroDriven v1.0 - Changed Script as needed
+
+# ========= OPTIONS ==================
+URL="https://github.com"
+SCRIPT_URL="${URL}/RetroDriven/MiSTer_UnofficialCores/blob/master/Scripts/Updater_RetroDriven.sh"
+CURL_RETRY="--connect-timeout 15 --max-time 120 --retry 3 --retry-delay 5 --silent"
+
+# ========= ADVANCED OPTIONS =========
+# ALLOW_INSECURE_SSL="true" will check if SSL certificate verification (see https://curl.haxx.se/docs/sslcerts.html )
+# is working (CA certificates installed) and when it's working it will use this feature for safe curl HTTPS downloads,
+# otherwise it will use --insecure option for disabling SSL certificate verification.
+# If CA certificates aren't installed it's advised to install them (i.e. using security_fixes.sh).
+# ALLOW_INSECURE_SSL="false" will never use --insecure option and if CA certificates aren't installed
+# any download will fail.
+ALLOW_INSECURE_SSL="true"
+
+# ========= CODE STARTS HERE =========
+# get the name of the script, or of the parent script if called through a 'curl ... | bash -'
+ORIGINAL_SCRIPT_PATH="${0}"
+[[ "${ORIGINAL_SCRIPT_PATH}" == "bash" ]] && \
+	ORIGINAL_SCRIPT_PATH="$(ps -o comm,pid | awk -v PPID=${PPID} '$2 == PPID {print $1}')"
+
+# ini file can contain user defined variables (as bash commands)
+# Load and execute the content of the ini file, if there is one
+INI_PATH="${ORIGINAL_SCRIPT_PATH%.*}.ini"
+if [[ -f "${INI_PATH}" ]] ; then
+	TMP=$(mktemp)
+	# preventively eliminate DOS-specific format and exit command  
+	dos2unix < "${INI_PATH}" 2> /dev/null | grep -v "^exit" > ${TMP}
+	source ${TMP}
+	rm -f ${TMP}
+fi
+
+# test network and https by pinging the target website 
+SSL_SECURITY_OPTION=""
+curl ${CURL_RETRY} "${URL}" > /dev/null 2>&1
+case $? in
+	0)
+		;;
+	60)
+		if [[ "${ALLOW_INSECURE_SSL}" == "true" ]]
+		then
+			SSL_SECURITY_OPTION="--insecure"
+		else
+			echo "CA certificates need"
+			echo "to be fixed for"
+			echo "using SSL certificate"
+			echo "verification."
+			echo "Please fix them i.e."
+			echo "using security_fixes.sh"
+			exit 2
+		fi
+		;;
+	*)
+		echo "No Internet connection"
+		exit 1
+		;;
+esac
+
+# download and execute the latest mister_updater.sh
+echo "Downloading and executing"
+echo "${SCRIPT_URL/*\//}"
+echo ""
+curl \
+	${CURL_RETRY} \
+	${SSL_SECURITY_OPTION} \
+	--fail \
+	--location \
+	"${SCRIPT_URL}?raw=true" | \
+	bash -
+
+exit 0