Update AetherGrapeEngine to honour --local

When running an application, --local can be used to collect the
application's dependencies in a local directory. Prior to
AetherGrapeEngine being introduced, using --local would result in the
dependencies being written to ./grapes. When AetherGrapeEngine was
introduced --local no longer had any effect.

This commit updates AetherGrapeEngine so that it honours --local,
writing its dependencies to ./repository. When --local is not specified
dependencies are written to ~/.m2/repository (the standard location
for the local Maven cache). As part of this change TestCommand has
been refactored so that it lazily initialises its GroovyCompiler. This
ensures that RunCommand has a chance to set the system property that
backs --local before AetherGrapeEngine is initialised and accesses the
property.

Fixes #99

spring-boot-cli-grape/src/main/java/org/springframework/boot/cli/compiler/AetherGrapeEngine.java

@@ -141,8 +141,18 @@ public class AetherGrapeEngine implements GrapeEngine {
 			}
 		});
 
-		LocalRepository localRepo = new LocalRepository(new File(
+		String grapeRootProperty = System.getProperty("grape.root");
-				System.getProperty("user.home"), ".m2/repository"));
+		File root;
+		if (grapeRootProperty != null && grapeRootProperty.trim().length() > 0) {
+			root = new File(grapeRootProperty);
+
+		}
+		else {
+			root = new File(System.getProperty("user.home"), ".m2");
+		}
+
+		LocalRepository localRepo = new LocalRepository(new File(root, "repository"));
+
 		repositorySystemSession.setLocalRepositoryManager(this.repositorySystem
 				.newLocalRepositoryManager(repositorySystemSession, localRepo));
 

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

@@ -76,7 +76,7 @@ public class RunCommand extends OptionParsingCommand {
 		protected void options() {
 			this.watchOption = option("watch", "Watch the specified file for changes");
 			this.localOption = option("local",
-					"Accumulate the dependencies in a local folder (./grapes)");
+					"Accumulate the dependencies in a local folder (./repository)");
 			this.editOption = option(asList("edit", "e"),
 					"Open the file with the default system editor");
 			this.noGuessImportsOption = option("no-guess-imports",

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

@@ -27,7 +27,6 @@ import java.util.ArrayList;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.logging.Level;
 
 import joptsimple.OptionSet;
 
@@ -46,11 +45,8 @@ import org.springframework.boot.cli.util.FileUtils;
  */
 public class TestCommand extends OptionParsingCommand {
 
-	private TestOptionHandler testOptionHandler;
-
 	public TestCommand() {
 		super("test", "Test a groovy script", new TestOptionHandler());
-		this.testOptionHandler = (TestOptionHandler) this.getHandler();
 	}
 
 	@Override
@@ -59,7 +55,7 @@ public class TestCommand extends OptionParsingCommand {
 	}
 
 	public TestResults getResults() {
-		return this.testOptionHandler.results;
+		return ((TestOptionHandler) this.getHandler()).results;
 	}
 
 	private static class TestGroovyCompilerConfiguration implements
@@ -79,27 +75,17 @@ public class TestCommand extends OptionParsingCommand {
 		public String getClasspath() {
 			return "";
 		}
-
-		public Level getLogLevel() {
-			return Level.INFO;
-		}
 	}
 
 	private static class TestOptionHandler extends OptionHandler {
 
-		private final GroovyCompiler compiler;
 		private TestResults results;
 
-		public TestOptionHandler() {
-			TestGroovyCompilerConfiguration configuration = new TestGroovyCompilerConfiguration();
-			this.compiler = new GroovyCompiler(configuration);
-			if (configuration.getLogLevel().intValue() <= Level.FINE.intValue()) {
-				System.setProperty("groovy.grape.report.downloads", "true");
-			}
-		}
-
 		@Override
 		protected void run(OptionSet options) throws Exception {
+			TestGroovyCompilerConfiguration configuration = new TestGroovyCompilerConfiguration();
+			GroovyCompiler compiler = new GroovyCompiler(configuration);
+
 			FileOptions fileOptions = new FileOptions(options, getClass()
 					.getClassLoader());
 
@@ -114,13 +100,13 @@ public class TestCommand extends OptionParsingCommand {
 
 			// Compile - Pass 1 - compile source code to see what test libraries were
 			// pulled in
-			Object[] sources = this.compiler.sources(fileOptions.getFilesArray());
+			Object[] sources = compiler.sources(fileOptions.getFilesArray());
 			List<File> testerFiles = compileAndCollectTesterFiles(sources);
 
 			// Compile - Pass 2 - add appropriate testers
 			List<File> files = new ArrayList<File>(fileOptions.getFiles());
 			files.addAll(testerFiles);
-			sources = this.compiler.sources(files.toArray(new File[files.size()]));
+			sources = compiler.sources(files.toArray(new File[files.size()]));
 			if (sources.length == 0) {
 				throw new RuntimeException("No classes found in '" + files + "'");
 			}