fix gradle checksum

build.gradle

@@ -2,6 +2,7 @@ plugins {
     id 'java'
     id 'jacoco'
     id 'maven-publish'
+    id 'signing'
     id 'com.github.johnrengelman.shadow' version '8.1.1'
 }
 
@@ -51,6 +52,15 @@ tasks.withType(JavaCompile).configureEach {
     options.compilerArgs.add("-parameters")
     options.compilerArgs += ["-Xlint:-options"]
 }
+tasks.withType(Jar) { task ->
+    task.doLast {
+        ant.checksum algorithm: 'md5', file: it.archivePath
+        ant.checksum algorithm: 'sha1', file: it.archivePath
+        ant.checksum algorithm: 'sha-256', file: it.archivePath, fileext: '.sha256'
+        ant.checksum algorithm: 'sha-512', file: it.archivePath, fileext: '.sha512'
+    }
+}
+
 
 test {
     useTestNG()
@@ -95,7 +105,10 @@ jacocoTestReport {
         html.required = true
     }
 }
-
+java {
+    withJavadocJar()
+    withSourcesJar()
+}
 javadoc {
     source = sourceSets.main.allJava
     options.with {
@@ -144,16 +157,27 @@ publishing {
 
         }
     }
+    repositories {
+        maven {
+            // change URLs to point to your repos, e.g. http://my.org/repo
+            def releasesRepoUrl = layout.buildDirectory.dir('repos/releases')
+            def snapshotsRepoUrl = layout.buildDirectory.dir('repos/snapshots')
+            url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl
+        }
+    }
     repositories {
         maven {
             name = "GitHubPackages"
             url = "https://maven.pkg.github.com/hillelmed/jenkins-client-java"
             credentials {
-                username = System.getenv("GITHUB_ACTOR")
-                password = System.getenv("GITHUB_TOKEN")
+                username = 'here'
+                password = 'here'
             }
         }
 
     }
 
 }
+signing {
+    sign configurations.archives
+}