Use one multi-module gradle build

.travis.yml

@@ -14,12 +14,7 @@ env:
   - TERM=dumb         # for gradle
 
 install: true
-script:
-- (cd jib-core; ./gradlew --stacktrace build)
-- (cd jib-plugins-common; ./gradlew --stacktrace build)
-- (cd jib-gradle-plugin; ./gradlew --stacktrace build)
-# unset _JAVA_OPTIONS to avoid spurious test failures
-- (cd jib-maven-plugin; unset _JAVA_OPTIONS; ./mvnw -B verify -U)
+script: ./gradlew build -s
 
 # cobbled together from
 #   https://docs.travis-ci.com/user/languages/java/#projects-using-gradle

build.gradle

@@ -0,0 +1,19 @@
+allprojects {
+    group 'com.google.cloud.tools'
+
+    repositories {
+        mavenCentral()
+    }
+}
+
+subprojects {
+    plugins.withId("java") {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+        compileJava.options.encoding = 'UTF-8'
+
+        jar.manifest.attributes(
+                'Implementation-Version': version
+        )
+    }
+}

jib-gradle-plugin/gradle/wrapper/gradle-wrapper.properties → gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

jib-gradle-plugin/gradlew → gradlew

@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"

jib-gradle-plugin/gradlew.bat → gradlew.bat

@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      http://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -14,7 +30,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome

jib-core/build.gradle

@@ -9,16 +9,7 @@ plugins {
   // For release.
   id 'maven'
   id 'net.researchgate.release' version '2.7.0'
-}
-
-group 'com.google.cloud.tools'
-
-sourceCompatibility = JavaVersion.VERSION_1_8
-targetCompatibility = JavaVersion.VERSION_1_8
-compileJava.options.encoding = 'UTF-8'
-
-repositories {
-  mavenCentral()
+  id "io.freefair.maven-jars" version "2.9.5"
 }
 
 sourceSets {
@@ -64,7 +55,6 @@ dependencies {
 
 jar {
   manifest {
-    attributes 'Implementation-Version': version
     attributes 'Automatic-Module-Name': 'com.google.cloud.tools.jib'
 
     // OSGi metadata
@@ -140,15 +130,6 @@ checkstyle {
 /* CHECKSTYLE */
 
 /* RELEASE */
-task sourceJar(type: Jar) {
-  from sourceSets.main.allJava
-  classifier 'sources'
-}
-
-task javadocJar(type: Jar, dependsOn: javadoc) {
-  from javadoc.destinationDir
-  classifier 'javadoc'
-}
 
 task writePom {
   project.afterEvaluate {
@@ -213,7 +194,7 @@ task writePom {
 // For Kokoro sign and releases
 task prepareRelease(type: Copy) {
   from jar
-  from sourceJar
+  from sourcesJar
   from javadocJar
   from writePom
   into "${project.buildDir}/release-artifacts"