# Created update_fabricmc.sh to download installer files. And also to generate server jars

lgsm/functions/update_fabricmc.sh

@@ -0,0 +1,147 @@
+#!/bin/bash
+# LinuxGSM update_fabricmc.sh function
+# Author: Ceddicedced
+# Contributors: http://linuxgsm.com/contrib
+# Website: https://linuxgsm.com
+# Description: Handles updating of FabricMC servers.
+
+local commandname="UPDATE"
+local commandaction="Update"
+local function_selfname="$(basename "$(readlink -f "${BASH_SOURCE[0]}")")"
+
+fn_install_fabric(){
+	# get build info
+    installername=$(echo -e "fabric-installer-${latestfabricinstaller}.jar")
+    installersha256=$(curl "https://${remotelocation}/net/fabricmc/fabric-installer/${latestfabricinstaller}/${installername}.sha256")
+	fn_fetch_file "https://${remotelocation}/net/fabricmc/fabric-installer/${latestfabricinstaller}/${installername}" "" "" "" "${tmpdir}" "fabric-installer.jar" "nochmodx" "norun" "force" "${installersha256}"
+	echo -e "Generating Fabric jars...\c"
+	java -jar ${tmpdir}/fabric-installer.jar server -dir ${serverfiles} -mcversion ${mcversion} -downloadMinecraft &> ${logdir}/script/fabric-installer.log
+	local exitcode=$?
+	if [ "${exitcode}" == "0" ]; then
+		fn_print_ok_eol_nl
+		fn_script_log_pass "Generating Fabric jars"
+		chmod u+x "${serverfiles}/${executable#./}"
+		echo "${latestfabricloader}" > "${localversionfile}"
+		fn_clear_tmp
+	else
+		fn_print_fail_eol_nl
+		fn_script_log_fatal "Generating Fabric jars with loader ${installername} and version ${mcversion}"
+		core_exit.sh
+	fi
+}
+
+fn_update_fabricmc_localbuild(){
+	# Gets local build info.
+	fn_print_dots "Checking for update: ${remotelocation}: checking local build"
+	sleep 0.5
+
+	if [ ! -f "${localversionfile}" ]; then
+		fn_print_error_nl "Checking for update: ${remotelocation}: checking local build: no local build files"
+		fn_script_log_error "No local build file found"
+	else
+		localbuild=$(head -n 1 "${localversionfile}")
+	fi
+
+	if [ -z "${localbuild}" ]; then
+		localbuild="0"
+		fn_print_error "Checking for update: ${remotelocation}: waiting for local build: missing local build info"
+		fn_script_log_error "Missing local build info, Set localbuild to 0"
+	else
+		fn_print_ok "Checking for update: ${remotelocation}: checking local build"
+		fn_script_log_pass "Checking local build"
+	fi
+	sleep 0.5
+}
+
+fn_update_fabricmc_remotebuild(){
+	# Gets remote build info.
+	latestfabricinstaller=$(curl -s https://${remotelocation}/net/fabricmc/fabric-installer/maven-metadata.xml | grep -oPm1 "(?<=<latest>)[^<]+")
+	latestfabricloader=$(curl -s https://${remotelocation}/net/fabricmc/fabric-loader/maven-metadata.xml | grep -oPm1 "(?<=<latest>)[^<]+")
+	# Checks if latestfabricloader variable has been set.
+	if [ -z "${latestfabricinstaller}" ]||[ -z "${latestfabricloader}" ]; then
+		fn_print_failure "Unable to get remote build"
+		fn_script_log_fatal "Unable to get remote build"
+		core_exit.sh
+	else
+		fn_print_ok "Latest Fabric loader version ${latestfabricloader}"
+		fn_script_log "Latest Fabric loader version ${latestfabricloader}"
+	fi
+}
+
+fn_update_fabricmc_compare(){
+	fn_print_dots "Checking for update: ${remotelocation}"
+	sleep 0.5
+	if [ "${localbuild}" != "${latestfabricloader}" ]||[ "${forceupdate}" == "1" ]; then
+		fn_print_ok_nl "Checking for update: ${remotelocation}"
+		echo -en "\n"
+		echo -e "Update available for version ${latestfabricinstaller}"
+		echo -e "* Local build: ${red}${localbuild}${default}"
+		echo -e "* Remote build: ${green}${latestfabricloader}${default}"
+		fn_script_log_info "Update available for version ${mcversion}"
+		fn_script_log_info "Local build: ${localbuild}"
+		fn_script_log_info "Remote build: ${latestfabricloader}"
+		fn_script_log_info "${localbuild} > ${latestfabricloader}"
+		echo -en "\n"
+		echo -en "applying update.\r"
+		echo -en "\n"
+
+		unset updateonstart
+
+		check_status.sh
+		# If server stopped.
+		if [ "${status}" == "0" ]; then
+			fn_install_fabric
+		# If server started.
+		else
+			exitbypass=1
+			command_stop.sh
+			exitbypass=1
+			fn_install_fabric
+			exitbypass=1
+			command_start.sh
+		fi
+		alert="update"
+		alert.sh
+	else
+		fn_print_ok_nl "Checking for update: ${remotelocation}"
+		echo -en "\n"
+		echo -e "No update available for version ${mcversion}"
+		echo -e "* Local build: ${green}${localbuild}${default}"
+		echo -e "* Remote build: ${green}${latestfabricloader}${default}"
+		fn_script_log_info "No update available"
+		fn_script_log_info "Local build: ${localbuild}"
+		fn_script_log_info "Remote build: ${latestfabricloader}"
+	fi
+}
+
+
+# The location where the builds are checked and downloaded.
+remotelocation="maven.fabricmc.net"
+
+
+localversionfile="${datadir}/fabricmc-version"
+
+# check if datadir was created, if not create it
+if [ ! -d "${datadir}" ]; then
+	mkdir -p "${datadir}"
+fi
+
+
+if [ "${mcversion}" == "latest" ]; then
+	mcversion=$(curl -s "https://launchermeta.mojang.com/mc/game/version_manifest.json" | jq -r '.latest.release')
+fi
+
+
+
+
+if [ "${firstcommandname}" == "INSTALL" ]; then
+	fn_update_fabricmc_remotebuild
+	fn_install_fabric
+else
+	fn_print_dots "Checking for update: ${remotelocation}"
+	fn_script_log_info "Checking for update: ${remotelocation}"
+	sleep 0.5
+	fn_update_fabricmc_localbuild
+	fn_update_fabricmc_remotebuild
+	fn_update_fabricmc_compare
+fi