magarena/Magarena.app/Contents/MacOS/MagarenaLauncher.sh

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#!/bin/sh
# based on http://mjhutchinson.com/journal/2010/01/24/creating_mac_app_bundle_for_gtk_app
# change these values to match your app
APPNAME="Magarena"
# java version check
REQUIRED_VERSION=1.[7-9]
VERSION_TITLE="Cannot launch $APPNAME"
VERSION_MSG="$APPNAME requires the Java SE 7 JDK or later."
DOWNLOAD_URL="http://www.oracle.com/technetwork/java/javase/downloads/index.html"
JAVA_VERSION="$(java -version 2>&1 | grep $REQUIRED_VERSION)"
if [ -z "$JAVA_VERSION" ]
then
osascript \
-e "set question to display dialog \"$VERSION_MSG\" with title \"$VERSION_TITLE\" buttons {\"Cancel\", \"Download...\"} default button 2" \
-e "if button returned of question is equal to \"Download...\" then open location \"$DOWNLOAD_URL\""
echo "$VERSION_TITLE"
echo "$VERSION_MSG"
exit 1
fi
# get the bundle's MacOS directory full path
base="${0%/*}"
# explicity set LC_CTYPE to UTF-8 to workaround http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8003228
export LC_CTYPE=UTF-8
# run app
cd "$base/../Java" && java -Dapple.laf.useScreenMenuBar=true -Xms256M -Xmx512M -noverify -jar Magarena.exe