Import attributes from appendix files

See gh-12005

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

@@ -1451,7 +1451,8 @@
 								</resource>
 							</resources>
 							<attributes>
-								<sources-root>${project.basedir}/src/</sources-root>
+								<sources-root>${project.basedir}/src</sources-root>
+								<asciidoc-sources-root>${project.basedir}/src/main/asciidoc</asciidoc-sources-root>
 								<generated-resources-root>${project.basedir}/target/generated-resources</generated-resources-root>
 								<spring-boot-repo>${spring-boot-repo}</spring-boot-repo>
 								<github-tag>${github-tag}</github-tag>

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix/application-properties.adoc

@@ -2,6 +2,9 @@
 [appendix]
 [[common-application-properties]]
 == Common application properties
+
+include::{asciidoc-sources-root}/attributes.adoc[]
+
 Various properties can be specified inside your `application.properties` file, inside
 your `application.yml` file, or as command line switches. This appendix provides a list
 of common Spring Boot properties and references to the underlying classes that consume

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

@@ -1,6 +1,9 @@
 [appendix]
 [[auto-configuration-classes]]
 == Auto-configuration classes
+
+include::{asciidoc-sources-root}/attributes.adoc[]
+
 Here is a list of all auto-configuration classes provided by Spring Boot, with links to
 documentation and source code. Remember to also look at the conditions report in your
 application for more details of which features are switched on.

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

@@ -1,6 +1,9 @@
 [appendix]
 [[configuration-metadata]]
 == Configuration Metadata
+
+include::{asciidoc-sources-root}/attributes.adoc[]
+
 Spring Boot jars include metadata files that provide details of all supported
 configuration properties. The files are designed to let IDE developers offer
 contextual help and "`code completion`" as users are working with `application.properties`

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix/dependency-versions.adoc

@@ -1,9 +1,12 @@
 [appendix]
 [[appendix-dependency-versions]]
 == Dependency versions
+
+include::{asciidoc-sources-root}/attributes.adoc[]
+
 The following table provides details of all of the dependency versions that are provided
 by Spring Boot in its CLI (Command Line Interface), Maven dependency management, and
 Gradle plugin. When you declare a dependency on one of these artifacts without declaring
 a version, the version listed in the table is used.
 
-include::{generated-resources-root}/effective-pom.adoc[]
+include::{generated-resources-root}/effective-pom.adoc[]

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix/executable-jar-format.adoc

@@ -1,6 +1,9 @@
 [appendix]
 [[executable-jar]]
 == The Executable Jar Format
+
+include::{asciidoc-sources-root}/attributes.adoc[]
+
 The `spring-boot-loader` modules lets Spring Boot support executable jar and
 war files. If you use the Maven plugin or the Gradle plugin, executable jars are
 automatically generated, and you generally do not need to know the details of how

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

@@ -2,7 +2,9 @@
 [[test-auto-configuration]]
 == Test Auto-configuration Annotations
 
+include::{asciidoc-sources-root}/attributes.adoc[]
+
 The following table lists the various `@…Test` annotations that can be used to test
 slices of your application and the auto-configuration that they import by default:
 
-include::{generated-resources-root}/test-slice-auto-configuration.adoc[]
+include::{generated-resources-root}/test-slice-auto-configuration.adoc[]