Use Asciidoctor extension to verify documented configuration properties

Closes gh-18451

spring-boot-project/spring-boot-docs/pom.xml

@@ -1522,8 +1522,31 @@
 								<spring-framework-version>${spring-framework.version}</spring-framework-version>
 								<spring-integration-version>${spring-integration.version}</spring-integration-version>
 								<spring-security-version>${spring-security.version}</spring-security-version>
-								<spring-webservices-version>${spring-ws.version}</spring-webservices-version>							</attributes>
+								<spring-webservices-version>${spring-ws.version}</spring-webservices-version>
+							</attributes>
 						</configuration>
+						<dependencies>
+							<dependency>
+								<groupId>io.spring.asciidoctor</groupId>
+								<artifactId>spring-asciidoctor-extensions-spring-boot</artifactId>
+								<version>${spring-asciidoctor-extensions.version}</version>
+							</dependency>
+							<dependency>
+								<groupId>org.springframework.boot</groupId>
+								<artifactId>spring-boot-actuator-autoconfigure</artifactId>
+								<version>${revision}</version>
+							</dependency>
+							<dependency>
+								<groupId>org.springframework.boot</groupId>
+								<artifactId>spring-boot-autoconfigure</artifactId>
+								<version>${revision}</version>
+							</dependency>
+							<dependency>
+								<groupId>org.springframework.boot</groupId>
+								<artifactId>spring-boot-devtools</artifactId>
+								<version>${revision}</version>
+							</dependency>
+						</dependencies>
 						<executions>
 							<execution>
 								<id>generate-html-documentation</id>
@@ -1551,9 +1574,9 @@
 										<attribute-missing>warn</attribute-missing>
 									</attributes>
 									<logHandler>
-										<outputToConsole>true</outputToConsole>
+										<outputToConsole>false</outputToConsole>
 										<failIf>
-											<severity>DEBUG</severity>
+											<severity>INFO</severity>
 										</failIf>
 									</logHandler>
 								</configuration>
@@ -1581,6 +1604,12 @@
 										<stylesdir>css/</stylesdir>
 										<stylesheet>spring.css</stylesheet>
 									</attributes>
+									<logHandler>
+										<outputToConsole>false</outputToConsole>
+										<failIf>
+											<severity>INFO</severity>
+										</failIf>
+									</logHandler>
 								</configuration>
 							</execution>
 							<execution>

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix-configuration-metadata.adoc

@@ -81,7 +81,7 @@ They use a simple JSON format with items categorized under either "`groups`" or
 Each "`property`" is a configuration item that the user specifies with a given value.
 For example, `server.port` and `server.address` might be specified in `application.properties`, as follows:
 
-[source,properties,indent=0]
+[source,properties,indent=0,configprops]
 ----
 	server.port=9090
 	server.address=127.0.0.1
@@ -94,7 +94,7 @@ NOTE: It is not required that every "`property`" has a "`group`".
 Some properties might exist in their own right.
 
 Finally, "`hints`" are additional information used to assist the user in configuring a given property.
-For example, when a developer is configuring the `spring.jpa.hibernate.ddl-auto` property, a tool can use the hints to offer some auto-completion help for the `none`, `validate`, `update`, `create`, and `create-drop` values.
+For example, when a developer is configuring the configprop:spring.jpa.hibernate.ddl-auto[] property, a tool can use the hints to offer some auto-completion help for the `none`, `validate`, `update`, `create`, and `create-drop` values.
 
 
 

spring-boot-project/spring-boot-parent/pom.xml

@@ -26,10 +26,11 @@
 		<maven.version>3.5.4</maven.version>
 		<maven-resolver.version>1.1.1</maven-resolver.version>
 		<spock.version>1.0-groovy-2.4</spock.version>
-		<testcontainers.version>1.12.2</testcontainers.version>
-		<testng.version>6.14.3</testng.version>
+		<spring-asciidoctor-extensions.version>0.3.0.BUILD-SNAPSHOT</spring-asciidoctor-extensions.version>
 		<spring-doc-resources.version>0.1.3.RELEASE</spring-doc-resources.version>
 		<spring-doc-resources.url>https://repo.spring.io/release/io/spring/docresources/spring-doc-resources/${spring-doc-resources.version}/spring-doc-resources-${spring-doc-resources.version}.zip</spring-doc-resources.url>
+		<testcontainers.version>1.12.2</testcontainers.version>
+		<testng.version>6.14.3</testng.version>
 	</properties>
 	<scm>
 		<url>https://github.com/spring-projects/spring-boot</url>

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/pom.xml

@@ -360,7 +360,7 @@
 							<dependency>
 								<groupId>io.spring.asciidoctor</groupId>
 								<artifactId>spring-asciidoctor-extensions</artifactId>
-								<version>0.2.0.RELEASE</version>
+								<version>${spring-asciidoctor-extensions.version}</version>
 							</dependency>
 						</dependencies>
 					</plugin>