Add missing license headers, switch to spotless for license header

handling

Author: Player3324

HEADER

@@ -1,14 +1,18 @@
-Copyright (C) 2016, 2018 Player, asie
+/*
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) $YEAR, FabricMC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.

build.gradle

@@ -2,6 +2,7 @@ plugins {
 	id 'java'
 	id 'maven-publish'
 	id 'checkstyle'
+	id 'com.diffplug.spotless' version '5.14.2'
 	id 'com.github.johnrengelman.shadow' version '6.1.0'
 }
 
@@ -67,6 +68,14 @@ checkstyle {
 	toolVersion = '8.31'
 }
 
+spotless {
+	ratchetFrom 'origin/master'
+
+	java {
+		licenseHeaderFile(rootProject.file('HEADER')).yearSeparator(', ')
+	}
+}
+
 publishing {
 	publications {
 		mavenJava(MavenPublication) {

src/main/java/net/fabricmc/tinyremapper/AsmClassRemapper.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2016, 2018 Player, asie
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) 2018, 2021, FabricMC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by

src/main/java/net/fabricmc/tinyremapper/AsmRemapper.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2016, 2018 Player, asie
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) 2018, 2021, FabricMC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by

src/main/java/net/fabricmc/tinyremapper/BridgeHandler.java

@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) 2020, 2021, FabricMC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 package net.fabricmc.tinyremapper;
 
 import org.objectweb.asm.ClassVisitor;

src/main/java/net/fabricmc/tinyremapper/ClassInstance.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2016, 2018 Player, asie
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) 2019, 2021, FabricMC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by

src/main/java/net/fabricmc/tinyremapper/FileSystemHandler.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2016, 2018 Player, asie
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) 2019, 2021, FabricMC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by

src/main/java/net/fabricmc/tinyremapper/IMappingProvider.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2016, 2018 Player, asie
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) 2016, 2021, FabricMC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by

src/main/java/net/fabricmc/tinyremapper/InputTag.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2016, 2018 Player, asie
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) 2020, FabricMC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by

src/main/java/net/fabricmc/tinyremapper/Main.java

@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2016, 2018 Player, asie
+ * Copyright (c) 2016, 2018, Player, asie
+ * Copyright (c) 2016, 2021, FabricMC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by