Support ANSI color from gradle bootRun

Update the BootRunTask to record the state of the System.console() so
that it can be picked up later by AnsiOutput.

Fixes gh-747

spring-boot-tools/spring-boot-gradle-plugin/src/main/groovy/org/springframework/boot/gradle/run/BootRunTask.java

@@ -54,6 +54,10 @@ public class BootRunTask extends JavaExec {
 
 	@Override
 	public void exec() {
+		if(System.console() != null) {
+			// Record that the console is available here for AnsiOutput to detect later
+			this.getEnvironment().put("spring.output.ansi.console-available", true);
+		}
 		addResourcesIfNecessary();
 		super.exec();
 	}

spring-boot/src/main/java/org/springframework/boot/ansi/AnsiOutput.java

 /*
- * Copyright 2012-2013 the original author or authors.
+ * Copyright 2012-2015 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.
@@ -30,6 +30,8 @@ public abstract class AnsiOutput {
 
 	private static Enabled enabled = Enabled.DETECT;
 
+	private static Boolean consoleAvailable;
+
 	private static final String OPERATING_SYSTEM_NAME = System.getProperty("os.name")
 			.toLowerCase();
 
@@ -48,6 +50,15 @@ public abstract class AnsiOutput {
 		AnsiOutput.enabled = enabled;
 	}
 
+	/**
+	 * Sets if the System.console() is know to be available.
+	 * @param consoleAvailable if the console is known to be available or {@code null} to
+	 * use standard detection logic.
+	 */
+	public static void setConsoleAvailable(Boolean consoleAvailable) {
+		AnsiOutput.consoleAvailable = consoleAvailable;
+	}
+
 	static Enabled getEnabled() {
 		return AnsiOutput.enabled;
 	}
@@ -115,7 +126,10 @@ public abstract class AnsiOutput {
 
 	private static boolean detectIfEnabled() {
 		try {
-			if (System.console() == null) {
+			if (Boolean.FALSE.equals(consoleAvailable)) {
+				return false;
+			}
+			if ((consoleAvailable == null) && (System.console() == null)) {
 				return false;
 			}
 			return !(OPERATING_SYSTEM_NAME.indexOf("win") >= 0);

spring-boot/src/main/java/org/springframework/boot/context/config/AnsiOutputApplicationListener.java

 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2015 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.
@@ -42,6 +42,11 @@ public class AnsiOutputApplicationListener implements
 			String enabled = resolver.getProperty("enabled");
 			AnsiOutput.setEnabled(Enum.valueOf(Enabled.class, enabled.toUpperCase()));
 		}
+
+		if (resolver.containsProperty("console-available")) {
+			AnsiOutput.setConsoleAvailable(resolver.getProperty("console-available",
+					Boolean.class));
+		}
 	}
 
 	@Override

spring-boot/src/test/java/org/springframework/boot/context/embedded/config/AnsiOutputApplicationListenerTests.java

 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2015 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.
@@ -71,7 +71,7 @@ public class AnsiOutputApplicationListenerTests {
 	}
 
 	@Test
-	public void disabledViaApplcationProperties() throws Exception {
+	public void disabledViaApplicationProperties() throws Exception {
 		ConfigurableEnvironment environment = new StandardEnvironment();
 		EnvironmentTestUtils.addEnvironment(environment, "spring.config.name:ansi");
 		SpringApplication application = new SpringApplication(Config.class);