Fix build failure

This commit reworks a7e1ec8 to fix the build failure and update the
documentation regarding default maven filtering option with
spring-boot-starter-parent

Fixes gh-1199

spring-boot-docs/src/main/asciidoc/howto.adoc

@@ -175,11 +175,11 @@ placeholders in `application.properties`, e.g.
 	server.port=${port:8080}
 ----
 
-TIP: If you are inheriting from the `spring-boot-starter-parent` POM, or if have enabled
+TIP: If you are inheriting from the `spring-boot-starter-parent` POM, the default filter
-maven filtering for the `application.properties` directly, you may want to change the
+token of the `maven-resources-plugins` has been changed from `+${*}+` to `@` (i.e.
-default filter token from `+${*}+` since it conflicts with those placeholders.
+`@maven.token@` instead of `${maven.token}`) as the former conflicts with those
-You can either use `+@*@+` (i.e. `@maven.token@` instead of `${maven.token}`) or you can
+placeholders. If you have enabled the maven filtering for the `application.properties`
-configure the `maven-resources-plugin` to use
+directly, you may want to change the default filter token to use
 http://maven.apache.org/plugins/maven-resources-plugin/resources-mojo.html#delimiters[other delimiters].
 
 NOTE: In this specific case the port binding will work in a PaaS environment like Heroku

spring-boot-starters/spring-boot-starter-parent/pom.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.springframework.boot</groupId>
@@ -19,6 +18,7 @@
 	</organization>
 	<properties>
 		<java.version>1.6</java.version>
+		<resource.delimiter>@</resource.delimiter> <!-- delimiter that doesn't clash with Spring ${} placeholders -->
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<maven.compiler.source>${java.version}</maven.compiler.source>
@@ -50,6 +50,13 @@
 					<include>**/application.properties</include>
 				</includes>
 			</resource>
+			<resource>
+				<directory>${basedir}/src/main/resources</directory>
+				<excludes>
+					<exclude>**/application.yml</exclude>
+					<exclude>**/application.properties</exclude>
+				</excludes>
+			</resource>
 		</resources>
 		<pluginManagement>
 			<plugins>
@@ -103,8 +110,7 @@
 					<version>2.6</version>
 					<configuration>
 						<delimiters>
-							<!-- Provide a delimiter that doesn't clash with Spring ${} placeholders -->
+							<delimiter>${resource.delimiter}</delimiter>
-							<delimiter>@</delimiter>
 						</delimiters>
 					</configuration>
 				</plugin>
@@ -175,22 +181,17 @@
 							</goals>
 							<configuration>
 								<transformers>
-									<transformer
+									<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
-										implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
 										<resource>META-INF/spring.handlers</resource>
 									</transformer>
-									<transformer
+									<transformer implementation="org.springframework.boot.maven.PropertiesMergingResourceTransformer">
-										implementation="org.springframework.boot.maven.PropertiesMergingResourceTransformer">
 										<resource>META-INF/spring.factories</resource>
 									</transformer>
-									<transformer
+									<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
-										implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
 										<resource>META-INF/spring.schemas</resource>
 									</transformer>
-									<transformer
+									<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
-										implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
+									<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-									<transformer
-										implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
 										<mainClass>${start-class}</mainClass>
 									</transformer>
 								</transformers>