INT-3397 Add spring-integration-bom

JIRA: https://jira.spring.io/browse/INT-3397

Similar to Spring Framework's; see
https://spring.io/blog/2013/12/03/spring-framework-4-0-rc2-available

build.gradle

@@ -659,6 +659,41 @@ project('spring-integration-xmpp') {
 	[compileJava,compileTestJava]*.options*.compilerArgs = ["${xLintArg},-path"]
 }
 
+project("spring-integration-bom") {
+	description = "Spring Integration (Bill of Materials)"
+
+	configurations.archives.artifacts.clear()
+	artifacts {
+		// work around GRADLE-2406 by attaching text artifact
+		archives(file("spring-integration-bom.txt"))
+	}
+
+	install {
+		repositories.mavenInstaller {
+			pom.whenConfigured {
+				packaging = "pom"
+				withXml {
+					asNode().children().last() + {
+						delegate.dependencyManagement {
+							delegate.dependencies {
+								parent.subprojects.sort { "$it.name" }.each { p ->
+									if (p != project) {
+										delegate.dependency {
+											delegate.groupId(p.group)
+											delegate.artifactId(p.name)
+											delegate.version(p.version)
+										}
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
 apply plugin: 'docbook-reference'
 
 reference {

settings.gradle

@@ -29,3 +29,4 @@ include 'spring-integration-twitter'
 include 'spring-integration-ws'
 include 'spring-integration-xml'
 include 'spring-integration-xmpp'
+include 'spring-integration-bom'

spring-integration-bom/spring-integration-bom.txt

@@ -0,0 +1,2 @@
+This meta-project is used to generate a bill-of-materials POM that contains the other
+projects in a dependencyManagement section.