Add a command to produce a self-contained executable JAR for a CLI app

A new command, jar, has been added to the CLI. The command can be
used to create a self-contained executable JAR file from a CLI app.

Basic usage is:

spring jar <jar-name> <source-files>

For example:

spring jar my-app.jar *.groovy

The resulting jar will contain the classes generated by compiling the
source files, all of the application's dependencies, and entries
on the application's classpath.

By default a CLI application has the current working directory on
its classpath. This can be overridden using the --classpath option.
Any file that is referenced directly by the classpath is always
included in the jar. Any file that is found a result of being
contained within a directory that is on the classpath is subject to
filtering to determine whether or not it should be included. The
default includes are public/**, static/**, resources/**,
META-INF/**, *. The default excludes are .*, repository/**, build/**,
target/**. To be included in the jar, a file must match one of the
includes and none of the excludes. The filters can be overridden using
the --include and --exclude options.

Closes #241

spring-boot-cli/src/test/java/org/springframework/boot/cli/command/jar/ResourceMatcherTests.java

@@ -0,0 +1,63 @@
+/*
+ * 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.cli.command.jar;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.Test;
+import org.springframework.boot.cli.command.jar.ResourceMatcher.MatchedResource;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * @author awilkinson
+ */
+public class ResourceMatcherTests {
+
+	private final ResourceMatcher resourceMatcher = new ResourceMatcher(Arrays.asList(
+			"alpha/**", "bravo/*", "*"), Arrays.asList(".*", "alpha/**/excluded"));
+
+	@Test
+	public void nonExistentRoot() throws IOException {
+		List<MatchedResource> matchedResources = this.resourceMatcher
+				.matchResources(Arrays.asList(new File("does-not-exist")));
+		assertEquals(0, matchedResources.size());
+	}
+
+	@Test
+	public void resourceMatching() throws IOException {
+		List<MatchedResource> matchedResources = this.resourceMatcher
+				.matchResources(Arrays.asList(new File(
+						"src/test/resources/resource-matcher/one"), new File(
+						"src/test/resources/resource-matcher/two"), new File(
+						"src/test/resources/resource-matcher/three")));
+		System.out.println(matchedResources);
+		List<String> paths = new ArrayList<String>();
+		for (MatchedResource resource : matchedResources) {
+			paths.add(resource.getPath());
+		}
+
+		assertEquals(6, paths.size());
+		assertTrue(paths.containsAll(Arrays.asList("alpha/nested/fileA", "bravo/fileC",
+				"fileD", "bravo/fileE", "fileF", "three")));
+	}
+}