checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
		"https://checkstyle.org/dtds/configuration_1_3.dtd">
<module name="Checker">
	<property name="localeLanguage" value="en"/>
	<property name="tabWidth" value="4"/>

	<module name="NewlineAtEndOfFile"/>
	<module name="JavadocPackage"/>

	<module name="SuppressionSingleFilter">
		<property name="checks" value="LeftCurly"/>
		<property name="message" value="line.break.after"/>
	</module>

	<module name="TreeWalker">
		<!-- Code format -->
		<module name="AnnotationLocation"/>
		<module name="LeftCurly"/>
		<module name="RightCurly"/>
		<module name="GenericWhitespace"/>
		<module name="NeedBraces">
			<property name="allowSingleLineStatement" value="true"/>
		</module>
		<module name="RegexpSinglelineJava">
			<property name="format" value="^\t* {4,}"/>
			<property name="message" value="Indent must use tab characters"/>
			<property name="ignoreComments" value="true"/>
		</module>

		<!-- Imports -->
		<module name="AvoidStarImport">
			<property name="allowStaticMemberImports" value="true"/>
		</module>
		<module name="IllegalImport">
			<!-- Prevent internal, AWT/Swing and JFX classes -->
			<property name="illegalPkgs" value="sun, java.awt, javax.swing, javafx"/>
		</module>
		<module name="ImportOrder">
			<property name="option" value="bottom"/>
			<property name="groups" value="/(com.mojang|net.fabricmc|net.minecraft)\..+/,*,/javax?\..+/"/>
			<property name="separated" value="true"/>
			<property name="useContainerOrderingForStatic" value="true"/>
		</module>
		<module name="RedundantImport"/>
		<module name="UnusedImports"/>
	</module>

	<module name="SuppressionFilter">
		<property name="file" value="${suppressions}"/>
	</module>
</module>