Jar signing

Author: jriwanek

build.gradle

@@ -74,6 +74,8 @@ minecraft {
     mappings = "snapshot_20170925"
 //    coreMod = ""
     makeObfSourceJar = false
+
+	replace '@FINGERPRINT@', project.findProperty('signSHA1')
 }
 
 repositories {
@@ -179,6 +181,26 @@ task deobfJar(type: Jar) {
     from sourceSets.main.output
 }
 
+task signJar(type: SignJar, dependsOn: reobfJar) {
+
+    // Skips if the keyStore property is missing.
+    onlyIf {
+        project.hasProperty('keyStore')
+    }
+
+    // findProperty allows us to reference the property without it existing. 
+    // Using project.propName would cause the script to fail validation if 
+    // the property did not exist. 
+    keyStore = project.findProperty('keyStore')
+    alias = project.findProperty('keyStoreAlias')
+    storePass = project.findProperty('keyStorePass')
+    keyPass = project.findProperty('keyStoreKeyPass')
+    inputFile = jar.archivePath
+    outputFile = jar.archivePath
+}
+
+build.dependsOn signJar
+
 task javadocJar(type: Jar, dependsOn: javadoc) {
     classifier = 'javadoc'
     from javadoc.getDestinationDir()

src/main/java/com/mcmoddev/orespawn/OreSpawn.java

@@ -22,7 +22,6 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.Mod.EventHandler;
@@ -42,7 +41,8 @@
 @Mod(modid = Constants.MODID,
     name = Constants.NAME,
     version = Constants.VERSION,
-    acceptedMinecraftVersions = "[1.12,)")
+    acceptedMinecraftVersions = "[1.12,)",
+	certificateFingerprint = "@FINGERPRINT@")
 
 public class OreSpawn {
 	@Instance
@@ -61,6 +61,11 @@ public static Map<Integer, List<SpawnBuilder>> getSpawns() {
 		return spawns;
 	}
 
+	@EventHandler
+	public void onFingerprintViolation(FMLFingerprintViolationEvent event) {
+		logger.warn("Invalid fingerprint detected!");
+	}
+
 	@EventHandler
 	public void preInit(FMLPreInitializationEvent ev) {
 		Config.loadConfig();