Add install command

Fixes gh-1393

spring-boot-cli/src/it/java/org/springframework/boot/cli/CommandLineIT.java

@@ -43,7 +43,7 @@ public class CommandLineIT {
 		Invocation cli = this.cli.invoke("hint");
 		assertThat(cli.await(), equalTo(0));
 		assertThat(cli.getErrorOutput().length(), equalTo(0));
-		assertThat(cli.getStandardOutputLines().size(), equalTo(7));
+		assertThat(cli.getStandardOutputLines().size(), equalTo(9));
 	}
 
 	@Test

spring-boot-cli/src/main/java/org/springframework/boot/cli/DefaultCommandFactory.java

@@ -24,6 +24,7 @@ import org.springframework.boot.cli.command.Command;
 import org.springframework.boot.cli.command.CommandFactory;
 import org.springframework.boot.cli.command.core.VersionCommand;
 import org.springframework.boot.cli.command.grab.GrabCommand;
+import org.springframework.boot.cli.command.install.InstallCommand;
 import org.springframework.boot.cli.command.jar.JarCommand;
 import org.springframework.boot.cli.command.run.RunCommand;
 import org.springframework.boot.cli.command.test.TestCommand;
@@ -37,7 +38,7 @@ public class DefaultCommandFactory implements CommandFactory {
 
 	private static final List<Command> DEFAULT_COMMANDS = Arrays.<Command> asList(
 			new VersionCommand(), new RunCommand(), new TestCommand(), new GrabCommand(),
-			new JarCommand());
+			new JarCommand(), InstallCommand.install(), InstallCommand.uninstall());
 
 	@Override
 	public Collection<Command> getCommands() {

spring-boot-cli/src/main/java/org/springframework/boot/cli/command/install/InstallCommand.java

@@ -0,0 +1,243 @@
+/*
+ * Copyright 2013-2014 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.install;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.nio.file.FileVisitResult;
+import java.nio.file.FileVisitor;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.List;
+
+import joptsimple.OptionSet;
+import joptsimple.OptionSpec;
+
+import org.codehaus.plexus.util.FileUtils;
+import org.springframework.boot.cli.command.Command;
+import org.springframework.boot.cli.command.OptionParsingCommand;
+import org.springframework.boot.cli.command.options.CompilerOptionHandler;
+import org.springframework.boot.cli.command.options.OptionSetGroovyCompilerConfiguration;
+import org.springframework.boot.cli.command.status.ExitStatus;
+import org.springframework.boot.cli.compiler.GroovyCompiler;
+import org.springframework.boot.cli.compiler.GroovyCompilerConfiguration;
+import org.springframework.boot.cli.compiler.RepositoryConfigurationFactory;
+import org.springframework.boot.cli.compiler.grape.RepositoryConfiguration;
+import org.springframework.boot.cli.util.Log;
+import org.springframework.util.SystemPropertyUtils;
+
+/**
+ * @author Dave Syer
+ *
+ */
+public class InstallCommand extends OptionParsingCommand {
+
+	public static Command install() {
+		return new InstallCommand("install", "Install dependencies to lib directory",
+				new InstallFileVisitorFactory());
+	}
+
+	public static Command uninstall() {
+		return new InstallCommand("uninstall",
+				"Uninstall dependencies from a lib directory",
+				new UninstallFileVisitorFactory());
+	}
+
+	private InstallCommand(String name, String description, FileVisitorFactory visitor) {
+		super(name, description, new InstallOptionHandler(visitor));
+	}
+
+	private static final class InstallOptionHandler extends CompilerOptionHandler {
+
+		private FileVisitorFactory factory;
+		private OptionSpec<Void> allOption;
+
+		public InstallOptionHandler(FileVisitorFactory factory) {
+			this.factory = factory;
+		}
+
+		@Override
+		protected void doOptions() {
+			if (this.factory.getClass().getName().contains("UninstallFile")) {
+				this.allOption = option("all", "Uninstall all");
+			}
+		}
+
+		@Override
+		protected ExitStatus run(OptionSet options) throws Exception {
+
+			@SuppressWarnings("unchecked")
+			List<String> args = (List<String>) options.nonOptionArguments();
+
+			if (options.has(this.allOption)) {
+				if (!args.isEmpty()) {
+					throw new IllegalArgumentException(
+							"No non-optional arguments permitted with --all");
+				}
+				uninstallAllJars();
+				return ExitStatus.OK;
+			}
+			if (args.isEmpty()) {
+				throw new IllegalArgumentException(
+						"Non-optional arguments required. Specify dependencies via group:artifact:version");
+			}
+
+			List<RepositoryConfiguration> repositoryConfiguration = RepositoryConfigurationFactory
+					.createDefaultRepositoryConfiguration();
+
+			GroovyCompilerConfiguration configuration = new OptionSetGroovyCompilerConfiguration(
+					options, this, repositoryConfiguration) {
+				@Override
+				public boolean isAutoconfigure() {
+					return false;
+				}
+			};
+
+			Path tmpdir = Files.createTempDirectory("SpringInstallCommand")
+					.toAbsolutePath();
+			String grapeRoot = System.getProperty("grape.root");
+			System.setProperty("grape.root", tmpdir.toString());
+
+			GroovyCompiler groovyCompiler = new GroovyCompiler(configuration);
+			try {
+				if (!args.isEmpty()) {
+					groovyCompiler.compile(createSources(args));
+					installJars(tmpdir);
+				}
+				FileUtils.deleteDirectory(tmpdir.toFile());
+			}
+			finally {
+				if (grapeRoot != null) {
+					System.setProperty("grape.root", grapeRoot);
+				}
+				else {
+					System.clearProperty("grape.root");
+				}
+			}
+
+			return ExitStatus.OK;
+		}
+
+		private void installJars(Path tmpdir) throws IOException {
+			File lib = getDefaultLibDirectory();
+			Files.walkFileTree(tmpdir, this.factory.visitor(lib));
+		}
+
+		private void uninstallAllJars() throws IOException {
+			File lib = getDefaultLibDirectory();
+			Files.walkFileTree(lib.toPath(), new DeleteNotTheCliVisitor());
+		}
+
+		private String createSources(List<String> args) throws IOException {
+			File file = File.createTempFile("SpringInstallCommand", ".groovy");
+			file.deleteOnExit();
+			OutputStreamWriter stream = new OutputStreamWriter(
+					new FileOutputStream(file), "UTF-8");
+			try {
+				for (String arg : args) {
+					stream.write("@Grab('" + arg + "')");
+				}
+				// Dummy class to force compiler to do grab
+				stream.write("class Installer {}");
+			}
+			finally {
+				stream.close();
+			}
+			return file.getAbsolutePath();
+		}
+
+		private static File getDefaultLibDirectory() {
+			String home = SystemPropertyUtils
+					.resolvePlaceholders("${spring.home:${SPRING_HOME:.}}");
+			final File lib = new File(home, "lib");
+			return lib;
+		}
+
+	}
+
+	private interface FileVisitorFactory {
+		FileVisitor<Path> visitor(File lib);
+	}
+
+	private static class DeleteNotTheCliVisitor extends SimpleFileVisitor<Path> {
+		@Override
+		public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
+				throws IOException {
+			String name = file.getFileName().toString();
+			if (name.endsWith(".jar") && !name.startsWith("spring-boot-cli")) {
+				file.toFile().delete();
+			}
+			return FileVisitResult.CONTINUE;
+		}
+	}
+
+	private static class InstallFileVisitorFactory implements FileVisitorFactory {
+
+		@Override
+		public SimpleFileVisitor<Path> visitor(final File lib) {
+			Log.info("Installing into: " + lib);
+			lib.mkdirs();
+			return new SimpleFileVisitor<Path>() {
+				@Override
+				public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
+						throws IOException {
+					if (file.getFileName().toString().endsWith(".jar")) {
+						Files.copy(file, new FileOutputStream(new File(lib, file
+								.getFileName().toString())));
+						return FileVisitResult.SKIP_SIBLINGS;
+					}
+					return FileVisitResult.CONTINUE;
+				}
+			};
+		}
+
+	}
+
+	private static class UninstallFileVisitorFactory implements FileVisitorFactory {
+
+		@Override
+		public SimpleFileVisitor<Path> visitor(final File lib) {
+			Log.info("Uninstalling from: " + lib);
+			if (!lib.exists()) {
+				return new SimpleFileVisitor<Path>() {
+					@Override
+					public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
+							throws IOException {
+						return FileVisitResult.TERMINATE;
+					}
+				};
+			}
+			return new SimpleFileVisitor<Path>() {
+				@Override
+				public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
+						throws IOException {
+					if (file.getFileName().toString().endsWith(".jar")) {
+						new File(lib, file.getFileName().toString()).delete();
+						return FileVisitResult.SKIP_SIBLINGS;
+					}
+					return FileVisitResult.CONTINUE;
+				}
+			};
+
+		}
+
+	}
+
+}