Allow meta-data driven version overrides in Gradle

Add a `versionManagement` gradle configuration which can be used to
provide alternative version meta-data. Primarily added so that the
Spring IO platform can provide version overrides without causing a
cyclic build dependency.

Fixes gh-750

spring-boot-tools/spring-boot-dependency-tools/src/test/java/org/springframework/boot/dependency/tools/PomManagedDependenciesTests.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2012-2014 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.
+ */
+
+package org.springframework.boot.dependency.tools;
+
+import java.io.InputStream;
+import java.util.Iterator;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.nullValue;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Tests for {@link PomManagedDependencies}.
+ * 
+ * @author Phillip Webb
+ */
+public class PomManagedDependenciesTests {
+
+	private PomManagedDependencies dependencies;
+
+	@Before
+	public void setup() {
+		InputStream x = getResource("test-effective-pom.xml");
+		InputStream y = getResource("test-dependencies-pom.xml");
+		this.dependencies = new PomManagedDependencies(x, y);
+	}
+
+	private InputStream getResource(String name) {
+		InputStream inputStream = getClass().getResourceAsStream(name);
+		assertNotNull("Unable to read " + name, inputStream);
+		return inputStream;
+	}
+
+	@Test
+	public void springBootVersion() throws Exception {
+		assertThat(this.dependencies.getSpringBootVersion(),
+				equalTo("1.0.0.BUILD-SNAPSHOT"));
+	}
+
+	@Test
+	public void iterate() throws Exception {
+		Iterator<Dependency> iterator = this.dependencies.iterator();
+		assertThat(iterator.next().toString(), equalTo("org.sample:sample01:1.0.0"));
+		assertThat(iterator.next().toString(), equalTo("org.sample:sample02:1.0.0"));
+		assertThat(iterator.next().toString(),
+				equalTo("org.springframework.boot:spring-boot:1.0.0.BUILD-SNAPSHOT"));
+		assertThat(iterator.hasNext(), equalTo(false));
+	}
+
+	@Test
+	public void findByArtifactAndGroupId() throws Exception {
+		assertThat(this.dependencies.find("org.sample", "sample02").toString(),
+				equalTo("org.sample:sample02:1.0.0"));
+	}
+
+	@Test
+	public void findByArtifactAndGroupIdMissing() throws Exception {
+		assertThat(this.dependencies.find("org.sample", "missing"), nullValue());
+	}
+
+	@Test
+	public void findByArtifactAndGroupIdOnlyInEffectivePom() throws Exception {
+		assertThat(this.dependencies.find("org.extra", "extra01"), nullValue());
+	}
+
+	@Test
+	public void findByArtifactId() throws Exception {
+		assertThat(this.dependencies.find("sample02").toString(),
+				equalTo("org.sample:sample02:1.0.0"));
+	}
+
+	@Test
+	public void findByArtifactIdMissing() throws Exception {
+		assertThat(this.dependencies.find("missing"), nullValue());
+	}
+
+	@Test
+	public void exludes() throws Exception {
+		Dependency dependency = this.dependencies.find("org.sample", "sample01");
+		assertThat(dependency.getExclusions().toString(),
+				equalTo("[org.exclude:exclude01]"));
+	}
+
+}

spring-boot-tools/spring-boot-dependency-tools/src/test/java/org/springframework/boot/dependency/tools/PropertiesFileManagedDependenciesTests.java

@@ -22,28 +22,28 @@ import org.junit.Before;
 import org.junit.Test;
 
 import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
 import static org.junit.Assert.assertThat;
 
 /**
- * Tests for {@link ManagedDependencies}.
+ * Tests for {@link PropertiesFileManagedDependencies}.
  * 
  * @author Phillip Webb
  */
-public class ManagedDependenciesTests {
+public class PropertiesFileManagedDependenciesTests {
 
-	private ManagedDependencies dependencies;
+	private PropertiesFileManagedDependencies dependencies;
 
 	@Before
-	public void setup() {
-		this.dependencies = new ManagedDependencies("test-dependencies-pom.xml",
-				"test-effective-pom.xml");
+	public void setup() throws Exception {
+		this.dependencies = new PropertiesFileManagedDependencies(getClass()
+				.getResourceAsStream("external.properties"));
 	}
 
 	@Test
-	public void version() throws Exception {
-		assertThat(this.dependencies.getVersion(), equalTo("1.0.0.BUILD-SNAPSHOT"));
+	public void springBootVersion() throws Exception {
+		assertThat(this.dependencies.getSpringBootVersion(),
+				equalTo("1.0.0.BUILD-SNAPSHOT"));
 	}
 
 	@Test
@@ -51,6 +51,8 @@ public class ManagedDependenciesTests {
 		Iterator<Dependency> iterator = this.dependencies.iterator();
 		assertThat(iterator.next().toString(), equalTo("org.sample:sample01:1.0.0"));
 		assertThat(iterator.next().toString(), equalTo("org.sample:sample02:1.0.0"));
+		assertThat(iterator.next().toString(),
+				equalTo("org.springframework.boot:spring-boot:1.0.0.BUILD-SNAPSHOT"));
 		assertThat(iterator.hasNext(), equalTo(false));
 	}
 
@@ -83,17 +85,9 @@ public class ManagedDependenciesTests {
 
 	@Test
 	public void exludes() throws Exception {
+		// No Support for exclusion
 		Dependency dependency = this.dependencies.find("org.sample", "sample01");
-		assertThat(dependency.getExclusions().toString(),
-				equalTo("[org.exclude:exclude01]"));
-	}
-
-	@Test
-	public void get() throws Exception {
-		ManagedDependencies dependencies = ManagedDependencies.get();
-		assertThat(dependencies.iterator().hasNext(), equalTo(true));
-		assertThat(dependencies.find("org.springframework", "spring-core"),
-				notNullValue());
+		assertThat(dependency.getExclusions().size(), equalTo(0));
 	}
 
 }

spring-boot-tools/spring-boot-dependency-tools/src/test/java/org/springframework/boot/dependency/tools/VersionManagedDependenciesTests.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2012-2014 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.
+ */
+
+package org.springframework.boot.dependency.tools;
+
+import java.util.Collections;
+import java.util.Iterator;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Tests for {@link VersionManagedDependencies}.
+ * 
+ * @author Phillip Webb
+ */
+public class VersionManagedDependenciesTests {
+
+	private VersionManagedDependencies dependencies;
+
+	@Before
+	public void setup() throws Exception {
+		PropertiesFileManagedDependencies root = new PropertiesFileManagedDependencies(
+				getClass().getResourceAsStream("external.properties"));
+		PropertiesFileManagedDependencies extra = new PropertiesFileManagedDependencies(
+				getClass().getResourceAsStream("additional-external.properties"));
+		this.dependencies = new VersionManagedDependencies(root,
+				Collections.<ManagedDependencies> singleton(extra));
+	}
+
+	@Test
+	public void extra() throws Exception {
+		assertThat(this.dependencies.find("org.sample", "sample03").toString(),
+				equalTo("org.sample:sample03:2.0.0"));
+	}
+
+	@Test
+	public void override() throws Exception {
+		assertThat(this.dependencies.find("org.sample", "sample02").toString(),
+				equalTo("org.sample:sample02:2.0.0"));
+	}
+
+	@Test
+	public void getSpringBootVersion() throws Exception {
+		assertThat(this.dependencies.getSpringBootVersion(),
+				equalTo("1.0.0.BUILD-SNAPSHOT"));
+	}
+
+	@Test
+	public void iterator() throws Exception {
+		Iterator<Dependency> iterator = this.dependencies.iterator();
+		assertThat(iterator.next().toString(), equalTo("org.sample:sample01:1.0.0"));
+		assertThat(iterator.next().toString(), equalTo("org.sample:sample02:2.0.0"));
+		assertThat(iterator.next().toString(),
+				equalTo("org.springframework.boot:spring-boot:1.0.0.BUILD-SNAPSHOT"));
+		assertThat(iterator.next().toString(), equalTo("org.sample:sample03:2.0.0"));
+		assertThat(iterator.hasNext(), equalTo(false));
+	}
+
+}

spring-boot-tools/spring-boot-dependency-tools/src/test/resources/org/springframework/boot/dependency/tools/additional-external.properties

@@ -0,0 +1,2 @@
+org.sample\:sample03=2.0.0
+org.sample\:sample02=2.0.0

spring-boot-tools/spring-boot-dependency-tools/src/test/resources/org/springframework/boot/dependency/tools/external.properties

@@ -0,0 +1,3 @@
+org.sample\:sample01=1.0.0
+org.sample\:sample02=1.0.0
+org.springframework.boot\:spring-boot=1.0.0.BUILD-SNAPSHOT

spring-boot-tools/spring-boot-dependency-tools/src/test/resources/org/springframework/boot/dependency/tools/test-dependencies-pom.xml

@@ -15,10 +15,10 @@
 				<artifactId>sample01</artifactId>
 				<version>${sample.version}</version>
 				<exclusions>
-                    <exclusion>
-                        <groupId>org.exclude</groupId>
-                        <artifactId>exclude01</artifactId>
-                    </exclusion>
+					<exclusion>
+						<groupId>org.exclude</groupId>
+						<artifactId>exclude01</artifactId>
+					</exclusion>
 				</exclusions>
 			</dependency>
 			<dependency>
@@ -26,6 +26,11 @@
 				<artifactId>sample02</artifactId>
 				<version>${sample.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot</artifactId>
+				<version>1.0.0.BUILD-SNAPSHOT</version>
+			</dependency>
 		</dependencies>
 	</dependencyManagement>
 </project>

spring-boot-tools/spring-boot-dependency-tools/src/test/resources/org/springframework/boot/dependency/tools/test-effective-pom.xml

@@ -24,6 +24,11 @@
 				<artifactId>sample02</artifactId>
 				<version>1.0.0</version>
 			</dependency>
+			<dependency>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot</artifactId>
+				<version>1.0.0.BUILD-SNAPSHOT</version>
+			</dependency>
 			<dependency>
 				<groupId>org.extra</groupId>
 				<artifactId>extra01</artifactId>