Added center print and horizontal line displays to core_messages. Added menu processor that can use ncurses with bash builtin fallback. Updated master script with self-installation feature.

_MasterScript/lgsm → _MasterScript/lgsm-core

@@ -154,12 +154,17 @@ fn_runfunction(){
 # Load GitHub hashing and updating functions
 fn_runfunction github_hash.sh
 
-# Process game configs and load variables needed to run script
-fn_runfunction game_settings.sh
-
 # Load core functions
 fn_runfunction core_functions.sh
 
-# Get option from command line and run option parser
-getopt=$1
-core_getopt.sh
+if [ "${selfname}" == "lgsm-core" ];
+then
+	fn_runfunction install_lgsm.sh
+else
+	# Process game configs and load variables needed to run script
+	fn_runfunction game_settings.sh
+
+	# Get option from command line and run option parser
+	getopt=$1
+	core_getopt.sh
+fi

functions/core_messages.sh

@@ -6,6 +6,18 @@ lgsm_version="271215"
 
 # Description: Defines on-screen messages such as [  OK  ] and how script logs look.
 
+# Print text center-aligned
+fn_print_center() {
+	columns="$(tput cols)"
+	line="$@"
+	printf "%*s\n" $(( (${#line} + columns) / 2)) "$line"
+}
+# Print horizontal line
+fn_print_horizontal(){
+	char="${1:-=}"
+	printf '%*s\n' "${COLUMNS:-$(tput cols)}" '' | tr ' ' "${char}"
+}
+
 # Date and servicename for log files.
 fn_scriptlog(){
 	if [ -n "${modulename}" ]; then
@@ -145,4 +157,4 @@ fn_printokeol(){
 # FAIL for end of line
 fn_printfaileol(){
 	echo -e "\e[0;31mFAIL\e[0m\n"
-}
+}

functions/install_lgsm.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+# LGSM install_lgsm function
+# Author: Jared Ballou
+# Website: http://gameservermanagers.com
+lgsm_version="200116"
+
+# Description: Display menu of available games and install the one selected
+
+# Perform installation
+fn_runfunction menu.sh
+# Listing of available games
+gamelist="gamedata/__game_list"
+# Installation path
+installpath=$(cd ~ && pwd)
+# Get game list
+fn_getgithubfile $gamelist
+# Display installer menu
+fn_menu result "Linux Game Server Manager" "Select game to install" "${lgsmdir}/${gamelist}"
+# If we have a selection, do the install
+if [ -n "${result}" ]; then
+	# Confirm path for installation
+	read -p "Select path to install ${result} [${installpath}]: " input
+	installpath=${input:-$installpath}
+	scriptpath="${installpath}/${result}"
+	# If file exists, confirm overwrite
+	if [ -e "${scriptpath}" ]; then
+		read -p "WARNING! ${scriptpath} already exists! OVERWRITE!? [y/N]: " input
+		if [ "${input}" != "y" ] && [ "${input}" != "Y" ]; then exit; fi
+	fi
+	# Install script
+	echo -ne "Installing to ${scriptpath}... \c"
+	# Create directory if missing. TODO: Gravefully handle errors like giving a file as the install dir
+	if [ ! -e $(dirname "${scriptpath}") ]; then
+		mkdir -p $(dirname "${scriptpath}")
+	fi
+	# Copy script and set executable
+	cp "${BASH_SOURCE[0]}" "${scriptpath}"
+	chmod 0755 "${scriptpath}"
+	if [ $? ]; then
+		fn_colortext green "Done"
+		echo "Script deployed to ${scriptpath}"
+	else
+		fn_colortext red "FAIL"
+	fi
+fi

functions/menu.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+# LGSM fn_messages function
+# Author: Jared Ballou
+# Website: http://gameservermanagers.com
+lgsm_version="200116"
+
+# Description: Display menus and return selection
+
+# Display simple Bash menu
+fn_menu_bash() {
+	local resultvar=$1
+	title=$2
+	caption=$3
+	options=$4
+	fn_print_horizontal
+	fn_print_center $title
+	fn_print_center $caption
+	fn_print_horizontal
+	menu_options=()
+	while IFS='' read -r line || [[ -n "$line" ]]; do
+		menu_options+=( "${line}" )
+	done < $options
+	menu_options+=( "Cancel" )
+	select option in "${menu_options[@]}"; do
+		if [ -n "${option}" ] && [ "${option}" != "Cancel" ]; then
+			eval "$resultvar=\"${option/%\ */}\""
+		fi
+		break
+	done
+}
+
+# Draw menu using Whiptail
+fn_menu_whiptail() {
+	local menucmd=$1
+	local resultvar=$2
+	title=$3
+	caption=$4
+	options=$5
+	height=${6:-40}
+	width=${7:-80}
+	menuheight=${8:-30}
+	#whiptail --title "<menu title>" --menu "<text to show>" <height> <width> <menu height> [ <tag> <item> ] . . .
+	menu_options=()
+	while read -r key val; do
+		menu_options+=( ${key//\"} "${val//\"}" )
+	done < $options
+	OPTION=$($menucmd --title "${title}" --menu "${caption}" $height $width $menuheight "${menu_options[@]}" 3>&1 1>&2 2>&3)
+	if [ $? = 0 ]; then
+		eval "$resultvar=\"${OPTION}\""
+	else
+		eval "$resultvar="
+	fi
+}
+
+# Show menu and receive input. We try to see if whiptail/dialog is available
+# for a pretty ncurses menu. If not, use Bash builtins.
+fn_menu() {
+	local resultvar=$1
+	local selection=""
+	title=$2
+	caption=$3
+	options=$4
+	# If this is a list of options as a string, dump it to a file so we can process it
+	if [ ! -e $options ]; then
+		echo -ne "{$options}\n" > "${cachedir}/menu.options"
+		options="${cachedir}/menu.options"
+	fi
+
+	# Get menu command
+	for menucmd in whiptail dialog bash; do
+		if [ -x $(which $menucmd) ]; then
+			menucmd=$(which $menucmd)
+			break
+		fi
+	done
+	case "$(basename $menucmd)" in
+		whiptail|dialog)
+			fn_menu_whiptail "${menucmd}" selection "${title}" "${caption}" "${options}" 40 80 30
+			;;
+		*)
+			fn_menu_bash selection "${title}" "${caption}" "${options}"
+			;;
+	esac
+	eval "$resultvar=\"${selection}\""
+}
+
+# Example usage:
+# This will display a menu of available games to install
+#fn_menu result "Linux Game Server Manager" "Select game to install" "../gamedata/__game_list"
+#echo "result is ${result}"