Switch to spring-asciidoctor-backends.

Pick up the new look and feel.

pom.xml

@@ -122,7 +122,7 @@
 		<xmlunit.version>2.7.0</xmlunit.version>
 		<xws-security.version>3.0</xws-security.version>
 		<xom.version>1.2.5</xom.version>
-		<docs.resources.version>0.2.5</docs.resources.version>
+		<spring-asciidoctor-backends.version>0.0.3</spring-asciidoctor-backends.version>
 	</properties>
 
 	<dependencyManagement>
@@ -206,13 +206,6 @@
 			<version>${woodstox.version}</version>
 			<scope>test</scope>
 		</dependency>
-		<dependency>
-			<groupId>io.spring.docresources</groupId>
-			<artifactId>spring-doc-resources</artifactId>
-			<version>${docs.resources.version}</version>
-			<type>zip</type>
-			<optional>true</optional>
-		</dependency>
 	</dependencies>
 
 	<build>
@@ -501,29 +494,7 @@
 			<id>docs</id>
 
 			<build>
-
 				<plugins>
-					<plugin>
-						<groupId>org.apache.maven.plugins</groupId>
-						<artifactId>maven-dependency-plugin</artifactId>
-						<executions>
-							<execution>
-								<id>unpack-doc-resources</id>
-								<goals>
-									<goal>unpack-dependencies</goal>
-								</goals>
-								<phase>generate-resources</phase>
-								<inherited>false</inherited>
-								<configuration>
-									<includeGroupIds>io.spring.docresources</includeGroupIds>
-									<includeArtifactIds>spring-doc-resources</includeArtifactIds>
-									<includeTypes>zip</includeTypes>
-									<excludeTransitive>true</excludeTransitive>
-									<outputDirectory>${project.build.directory}/refdocs/</outputDirectory>
-								</configuration>
-							</execution>
-						</executions>
-					</plugin>
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-resources-plugin</artifactId>
@@ -550,17 +521,17 @@
 					<plugin>
 						<groupId>org.asciidoctor</groupId>
 						<artifactId>asciidoctor-maven-plugin</artifactId>
-						<version>2.1.0</version>
+						<version>2.2.2</version>
 						<dependencies>
 							<dependency>
 								<groupId>org.asciidoctor</groupId>
 								<artifactId>asciidoctorj-pdf</artifactId>
-								<version>1.5.4</version>
+								<version>2.3.0</version>
 							</dependency>
 							<dependency>
-								<groupId>org.asciidoctor</groupId>
-								<artifactId>asciidoctorj-epub3</artifactId>
-								<version>1.5.1</version>
+								<groupId>io.spring.asciidoctor.backends</groupId>
+								<artifactId>spring-asciidoctor-backends</artifactId>
+								<version>${spring-asciidoctor-backends.version}</version>
 							</dependency>
 						</dependencies>
 						<executions>
@@ -572,14 +543,14 @@
 									<goal>process-asciidoc</goal>
 								</goals>
 								<configuration>
-									<backend>html5</backend>
+									<backend>spring-html</backend>
 									<outputDirectory>${project.build.directory}/site/reference/html</outputDirectory>
 									<sourceHighlighter>highlight.js</sourceHighlighter>
 									<attributes>
 										// these attributes are required to use the doc resources
 										<docinfo>shared</docinfo>
 										<stylesdir>css/</stylesdir>
-										<stylesheet>spring.css</stylesheet>
+										<stylesheet>site.css</stylesheet>
 										<linkcss>true</linkcss>
 										<icons>font</icons>
 										<highlightjsdir>js/highlight</highlightjsdir>
@@ -602,20 +573,6 @@
 									<sourceHighlighter>coderay</sourceHighlighter>
 								</configuration>
 							</execution>
-
-							<execution>
-								<id>epub</id>
-								<phase>generate-resources</phase>
-								<inherited>false</inherited>
-								<goals>
-									<goal>process-asciidoc</goal>
-								</goals>
-								<configuration>
-									<outputDirectory>${project.build.directory}/site/reference/epub</outputDirectory>
-									<backend>epub3</backend>
-									<sourceHighlighter>coderay</sourceHighlighter>
-								</configuration>
-							</execution>
 						</executions>
 
 						<configuration>
@@ -632,7 +589,6 @@
 								<baseDir>${project.basedir}</baseDir>
 							</attributes>
 						</configuration>
-
 					</plugin>
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
@@ -839,6 +795,14 @@
 	</profiles>
 
 	<repositories>
+		<repository>
+			<id>spring-release</id>
+			<name>Spring Releases</name>
+			<url>https://repo.spring.io/release</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</repository>
 		<repository>
 			<id>spring-libs-snapshot</id>
 			<url>https://repo.spring.io/libs-snapshot</url>