Update_RetroDriven_MAME.sh

#!/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/MiSTerMAME

: '
###### Disclaimer / Legal Information ######
By downloading and using this Script you are agreeing to the following:

* You are responsible for checking your local laws regarding the use of the ROMs that this Script downloads.
* You are authorized/licensed to own/use the ROMs associated with this Script.
* You will not distribute any of these files without the appropriate permissions.
* You own the original Arcade PCB for each ROM file that you download.
* I take no responsibility for any data loss or anything, use the script at your own risk.
'

# RetroDriven v1.0 - Changed Script as needed

# ========= OPTIONS ==================
URL="https://github.com"
SCRIPT_URL="${URL}/RetroDriven/MiSTerMAME/blob/master/Scripts/Updater_RetroDriven_MAME.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