Use @*@ delimiters in Maven resource filtering

It *is* very useful to have filtering on by default, so that is now
the case (in spring-boot-starter-parent). Users can filter resources
by default by adding @*@ placeholders (so as not to clash with Spring
${} placeholders).

Fixes gh-1199

spring-boot-samples/spring-boot-sample-actuator/src/main/resources/application.properties

@@ -18,4 +18,7 @@ shell.auth: spring
 #shell.auth.key.path: ${user.home}/test/id_rsa.pub.pem
 #shell.auth: simple
 spring.jmx.enabled: true
-
+info.group: @project.groupId@
+info.artifact: @project.artifactId@
+info.name: @project.name@
+info.version: @project.version@

spring-boot-samples/spring-boot-sample-actuator/src/test/java/sample/actuator/SampleActuatorApplicationTests.java

@@ -145,6 +145,15 @@ public class SampleActuatorApplicationTests {
 				entity.getBody().contains("\"hello\":1"));
 	}
 
+	@Test
+	public void testInfo() throws Exception {
+		ResponseEntity<String> entity = new TestRestTemplate().getForEntity(
+				"http://localhost:" + this.port + "/info", String.class);
+		assertEquals(HttpStatus.OK, entity.getStatusCode());
+		assertTrue("Wrong body: " + entity.getBody(),
+				entity.getBody().contains("\"artifact\":\"spring-boot-sample-actuator\""));
+	}
+
 	@Test
 	public void testErrorPage() throws Exception {
 		ResponseEntity<String> entity = new TestRestTemplate("user", getPassword())

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

@@ -1,5 +1,6 @@
 <?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" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<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">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.springframework.boot</groupId>
@@ -49,13 +50,6 @@
 					<include>**/application.properties</include>
 				</includes>
 			</resource>
-			<resource>
-				<directory>${basedir}/src/main/resources</directory>
-				<excludes>
-					<exclude>**/application.yml</exclude>
-					<exclude>**/application.properties</exclude>
-				</excludes>
-			</resource>
 		</resources>
 		<pluginManagement>
 			<plugins>
@@ -103,6 +97,17 @@
 						<mainClass>${start-class}</mainClass>
 					</configuration>
 				</plugin>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-resources-plugin</artifactId>
+					<version>2.6</version>
+					<configuration>
+						<delimiters>
+							<!-- Provide a delimiter that doesn't clash with Spring ${} placeholders -->
+							<delimiter>@</delimiter>
+						</delimiters>
+					</configuration>
+				</plugin>
 				<plugin>
 					<groupId>pl.project13.maven</groupId>
 					<artifactId>git-commit-id-plugin</artifactId>
@@ -170,17 +175,22 @@
 							</goals>
 							<configuration>
 								<transformers>
-									<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
+									<transformer
+										implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
 										<resource>META-INF/spring.handlers</resource>
 									</transformer>
-									<transformer implementation="org.springframework.boot.maven.PropertiesMergingResourceTransformer">
+									<transformer
+										implementation="org.springframework.boot.maven.PropertiesMergingResourceTransformer">
 										<resource>META-INF/spring.factories</resource>
 									</transformer>
-									<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
+									<transformer
+										implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
 										<resource>META-INF/spring.schemas</resource>
 									</transformer>
-									<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
+									<transformer
-									<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+										implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
+									<transformer
+										implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
 										<mainClass>${start-class}</mainClass>
 									</transformer>
 								</transformers>