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Hybrid Maven/Gradle plugin to package Java applications as native Windows, Mac OS X or GNU/Linux executables and create installers for them

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#set ($vmArgs = $StringUtils.join($info.vmArgs, " "))
#!/usr/bin/env bash
# GNU/Linux startup script generated by JavaPackager plugin

SCRIPTPATH=$(dirname "$(readlink -e "$0")")

#if ($info.bundleJre)
JAVA="$SCRIPTPATH/${info.jreDirectoryName}/bin/java"
#else
function showMessage() {
	if type -p notify-send; then
		notify-send -u critical "${info.name}" "$1"
	else
		echo $1
	fi
}
if type -p java > /dev/null; then
    JAVA=java
elif [[ -n "$JAVA_HOME" ]] && [[ -x "$JAVA_HOME/bin/java" ]];  then
    JAVA="$JAVA_HOME/bin/java"
else
    showMessage "Java not installed"
    exit 1
fi
#if ($info.jreMinVersion)
function compareVersions() {
        [[ "$1" == "$2" ]] && return 0
        local IFS=.
        local i v1 v2
        read -r -a v1 <<< "$1"
        read -r -a v2 <<< "$2"
        for ((i=${#v1[@]}; i<${#v2[@]}; i++))
        do
                v1[i]=0
        done
        for ((i=${#v2[@]}; i<${#v1[@]}; i++))
        do
                v2[i]=0
        done
        for ((i=0; i<${#v1[@]}; i++))
        do
                [[ "${v1[$i]}" > "${v2[$i]}" ]] && return 0
                [[ "${v1[$i]}" < "${v2[$i]}" ]] && return 1
        done
        return 0
}
JAVA_VERSION=$("$JAVA" -version 2>&1 | awk -F '"' '/version/ {print $2}')
compareVersions "$JAVA_VERSION" "${info.jreMinVersion}"
if [[ $? != 0 ]]; then
    showMessage "The application requires a Java Runtime Environment ${info.jreMinVersion} or higher."
    exit 1
fi
#end
#end

#if ($info.linuxConfig.wrapJar)
BINARY="$SCRIPTPATH/${info.executable.name}"
#else
BINARY="$SCRIPTPATH/${info.jarFile.name}"
#end

#if ($info.envPath)
export PATH=${info.envPath}
#end

JVMDefaultOptions="${vmArgs}"
JVMOptionsFile="$SCRIPTPATH/${info.name}.l4j.ini"
[ -f "${JVMOptionsFile}" ] && while read -r option; do JVMDefaultOptions+=" $option"; done <<< $(sed "/^#.*$/d" "${JVMOptionsFile}")

JVMClassPath="$BINARY"
#foreach ($classpath in $info.classpaths)
JVMClassPath+=":${classpath}"
#end

#if ($info.useResourcesAsWorkingDir)
cd "$SCRIPTPATH"
#end

#if ($info.scripts.bootstrap)
# invoke bootstrap script
Bootstrap="$SCRIPTPATH/scripts/${info.bootstrapFile.name}" && [ -x "$Bootstrap" ] && "$Bootstrap"
#end

#if ($info.administratorRequired)
pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY GDKBACKEND=x11 "${JAVA}" ${JVMDefaultOptions} -jar "${JVMClassPath}" $@
#else
"${JAVA}" ${JVMDefaultOptions} -jar "${JVMClassPath}" $@
#end
exit 0