add an sls configuration (palantir#94)

Author: jmcampanini

readme.md

@@ -98,6 +98,17 @@ As part of package creation, this plugin will create three shell scripts:
 In addition to creating these scripts, this plugin will merge the entire
 contents of `${projectDir}/service` and `${projectDir}/var` into the package.
 
+The plugin also exposes the tar file as an artifact in the `sls` configuration, making it easy to
+share the artifact between sibling Gradle projects. For example:
+
+```groovy
+configurations { tarballs }
+
+dependencies {
+    tarballs project(path: ':other-project', configuration: 'sls')
+}
+```
+
 Running with Gradle
 -------------------
 To run the main class using Gradle, run the `run` task.

src/main/groovy/com/palantir/gradle/javadist/JavaDistributionPlugin.groovy

@@ -27,6 +27,7 @@ import java.nio.file.Paths
 class JavaDistributionPlugin implements Plugin<Project> {
 
     private static final String GROUP_NAME = "Distribution"
+    private static final String SLS_CONFIGURATION_NAME = "sls"
 
     void apply(Project project) {
         // force application of java
@@ -147,6 +148,9 @@ class JavaDistributionPlugin implements Plugin<Project> {
             it.description = "Runs the specified project using configured mainClass and with default args."
         })
 
+        project.configurations.create(SLS_CONFIGURATION_NAME)
+        project.artifacts.add(SLS_CONFIGURATION_NAME, distTar)
+
         project.afterEvaluate {
             manifestClasspathJar.configure(ext)
             startScripts.configure(ext)

src/test/groovy/com/palantir/gradle/javadist/GradleTestSpec.groovy

@@ -3,6 +3,7 @@ package com.palantir.gradle.javadist
 import com.energizedwork.spock.extensions.TempDirectory
 import groovy.transform.CompileStatic
 import groovy.transform.TypeCheckingMode
+import nebula.test.multiproject.MultiProjectIntegrationHelper
 import org.gradle.testkit.runner.BuildResult
 import org.gradle.testkit.runner.GradleRunner
 import org.gradle.testkit.runner.TaskOutcome
@@ -11,12 +12,16 @@ import spock.lang.Specification
 import java.nio.file.Files
 
 public class GradleTestSpec extends Specification {
-    @TempDirectory
+    @TempDirectory(clean = false)
     File projectDir
     File buildFile
+    File settingsFile
+    MultiProjectIntegrationHelper helper
 
     def setup() {
         buildFile = file("build.gradle")
+        settingsFile = new File(projectDir, 'settings.gradle')
+        helper = new MultiProjectIntegrationHelper(projectDir, settingsFile)
         println("Build directory: \n" + projectDir.absolutePath)
     }
 

src/test/groovy/com/palantir/gradle/javadist/JavaDistributionPluginTests.groovy

@@ -18,6 +18,7 @@ package com.palantir.gradle.javadist
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory
 import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.TaskOutcome
 
 class JavaDistributionPluginTests extends GradleTestSpec {
 
@@ -342,7 +343,47 @@ class JavaDistributionPluginTests extends GradleTestSpec {
         then:
         buildResult.output =~ ("before: distTar: ${projectDir}/build/distributions/my-service.tgz")
         buildResult.output =~ ("after: distTar: ${projectDir}/build/distributions/my-service.tgz")
+    }
+
+    def 'exposes an artifact through the sls configuration'() {
+        given:
+        helper.addSubproject('parent', '''
+            plugins {
+                id 'com.palantir.java-distribution'
+                id 'java'
+            }
+            repositories { jcenter() }
+            version '0.1'
+            distribution {
+                serviceName "my-service"
+                mainClass "dummy.service.MainClass"
+                args "hello"
+            }
+        ''')
+
+        helper.addSubproject('child', '''
+            configurations {
+                fromOtherProject
+            }
+            dependencies {
+                fromOtherProject project(path: ':parent', configuration: 'sls')
+            }
+            task untar(type: Copy) {
+                // ensures the artifact is built by depending on the configuration
+                dependsOn configurations.fromOtherProject
 
+                // copy the contents of the tarball
+                from tarTree(configurations.fromOtherProject.singleFile)
+                into 'build/exploded'
+            }
+        ''')
+
+        when:
+        BuildResult buildResult = runSuccessfully(':child:untar')
+
+        then:
+        buildResult.task(':parent:distTar').outcome == TaskOutcome.SUCCESS
+        file('child/build/exploded/my-service-0.1/deployment/manifest.yml')
     }
 
     private static def createUntarBuildFile(buildFile) {