Make sure logback console output happens early in lifecycle

The problem was that the basic-logback.xml was valid configuration
but not in a <configuration> tag, so it wasn't valid on its own.
This change fixes that.

Fixes gh-585

spring-boot/src/main/java/org/springframework/boot/env/PropertySourcesLoader.java

@@ -22,6 +22,8 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.springframework.core.env.MutablePropertySources;
 import org.springframework.core.env.PropertySource;
 import org.springframework.core.io.Resource;
@@ -37,6 +39,8 @@ import org.springframework.util.StringUtils;
  */
 public class PropertySourcesLoader {
 
+	private static Log logger = LogFactory.getLog(PropertySourcesLoader.class);
+
 	private final MutablePropertySources propertySources;
 
 	private final List<PropertySourceLoader> loaders;
@@ -164,6 +168,7 @@ public class PropertySourcesLoader {
 
 		EnumerableCompositePropertySource group = getGeneric(basename);
 		group.add(source);
+		logger.info("Adding PropertySource: " + source + " in group: " + basename);
 		if (this.propertySources.contains(group.getName())) {
 			this.propertySources.replace(group.getName(), group);
 		}

spring-boot/src/main/resources/org/springframework/boot/logging/logback/base.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <included>
 
-	<include resource="org/springframework/boot/logging/logback/basic-logback.xml"/>
+	<include resource="org/springframework/boot/logging/logback/basic.xml"/>
 
 	<property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${java.io.tmpdir:-/tmp}/}spring.log}"/>
 	<property name="FILE_LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} %5p ${PID:- } [%t] --- %-40.40logger{39} : %m%n%wex"/>

spring-boot/src/main/resources/org/springframework/boot/logging/logback/basic-logback.xml

 <?xml version="1.0" encoding="UTF-8"?>
-<included>
-	<property name="CONSOLE_LOG_PATTERN" value="%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(%5p) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t{14}]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n%wex"/>
-
-	<conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
-	<conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" />
-
-	<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
-		<encoder>
-			<pattern>${CONSOLE_LOG_PATTERN}</pattern>
-		</encoder>
-	</appender>
-
-	<appender name="DEBUG_LEVEL_REMAPPER" class="org.springframework.boot.logging.logback.LevelRemappingAppender">
-	   <destinationLogger>org.springframework.boot</destinationLogger>
-	</appender>
-
-	<root level="INFO">
-		<appender-ref ref="CONSOLE" />
-	</root>
-
-	<logger name="org.hibernate.validator.internal.util.Version" level="WARN"/>
-	<logger name="org.apache.coyote.http11.Http11NioProtocol" level="WARN"/>
-	<logger name="org.crsh.plugin" level="WARN"/>
-	<logger name="org.apache.tomcat.util.net.NioSelectorPool" level="WARN"/>
-	<logger name="org.apache.catalina.startup.DigesterFactory" level="ERROR"/>
-	<logger name="org.thymeleaf" additivity="false">
-		<appender-ref ref="DEBUG_LEVEL_REMAPPER"/>
-	</logger>
-
-</included>
+<configuration>
+	<include resource="org/springframework/boot/logging/logback/basic.xml" />
+</configuration>

spring-boot/src/main/resources/org/springframework/boot/logging/logback/basic.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<included>
+	<property name="CONSOLE_LOG_PATTERN" value="%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(%5p) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t{14}]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n%wex"/>
+
+	<conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
+	<conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" />
+
+	<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+		<encoder>
+			<pattern>${CONSOLE_LOG_PATTERN}</pattern>
+		</encoder>
+	</appender>
+
+	<appender name="DEBUG_LEVEL_REMAPPER" class="org.springframework.boot.logging.logback.LevelRemappingAppender">
+	   <destinationLogger>org.springframework.boot</destinationLogger>
+	</appender>
+
+	<root level="INFO">
+		<appender-ref ref="CONSOLE" />
+	</root>
+
+	<logger name="org.hibernate.validator.internal.util.Version" level="WARN"/>
+	<logger name="org.apache.coyote.http11.Http11NioProtocol" level="WARN"/>
+	<logger name="org.crsh.plugin" level="WARN"/>
+	<logger name="org.apache.tomcat.util.net.NioSelectorPool" level="WARN"/>
+	<logger name="org.apache.catalina.startup.DigesterFactory" level="ERROR"/>
+	<logger name="org.thymeleaf" additivity="false">
+		<appender-ref ref="DEBUG_LEVEL_REMAPPER"/>
+	</logger>
+
+</included>

spring-boot/src/test/java/org/springframework/boot/logging/logback/LogbackLoggingSystemTests.java

@@ -24,12 +24,18 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
+import org.slf4j.ILoggerFactory;
+import org.slf4j.impl.StaticLoggerBinder;
 import org.springframework.boot.logging.LogLevel;
 import org.springframework.boot.test.OutputCapture;
 import org.springframework.util.StringUtils;
 
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.LoggerContext;
+
 import static org.hamcrest.Matchers.equalTo;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 
@@ -65,6 +71,15 @@ public class LogbackLoggingSystemTests {
 		System.clearProperty("PID");
 	}
 
+	@Test
+	public void testBasicConfigLocation() throws Exception {
+		this.loggingSystem.beforeInitialize();
+		ILoggerFactory factory = StaticLoggerBinder.getSingleton().getLoggerFactory();
+		LoggerContext context = (LoggerContext) factory;
+		Logger root = context.getLogger(Logger.ROOT_LOGGER_NAME);
+		assertNotNull(root.getAppender("CONSOLE"));
+	}
+
 	@Test
 	public void testNonDefaultConfigLocation() throws Exception {
 		this.loggingSystem.beforeInitialize();