This commit adds configuration to the Spring Boot Gradle plugin that
allows the names and contents of layers to be customized in the build
configuration.
Fixes gh-20296
With this commit, the Maven `spring-boot:build-image` goal and the
Gradle `bootBuildImage` task will configure the OpenJDK buildpack
to use the same JRE version as the project's target version,
provided the buildpack Java version is not explicitly set in the
build configuration.
Fixes gh-20172
This commit adds a `createdBy` structure to the metadata of the ephemeral
builder container image that identifies Spring Boot as the creator of the
image, along with the Spring Boot version.
See gh-20126
Previously, reflective access to the archiveBaseName property
incorrectly treated the property as a String. It should have been
treated as a Property<String>. This caused an exception to be thrown
and the deprecated baseName property to be used as a fallback.
This commit corrects the reflective access to the archiveBaseName
property. It also updates the tests to fail if a build outputs a
deprecation warning. Tests that use Gradle's Maven plugin have been
updated to expect deprecation warnings when run with Gradle 6.0 where
the plugin is deprecated. Tests that configure an archive's base name
have been updated to use archiveBaseName when running with Gradle 6.0
and later.
Closes gh-18663
Previously, our Gradle plugin was not tested against Gradle 6.0,
a number of deprecation warnings were output when using the plugin
with Gradle 6, and some functionality related to the application
plugin did not work as expected.
This commit tests the plugin against Gradle 6. It also avoids calling
deprecated APIs. The plugin is compatibile against Gradle 4.10 where
the deprecated APIs' replacements are not available so reflection is
used to call the replcaements. Lastly, the way in which the base name
of the boot distribution that is created when the application plugin
is applied has been modified to ensure that it is effective when using
Gradle 6.
Closes gh-18663
Apply checkstyle rule to ensure that private and package private
classes do not have unnecessary public methods. Test classes have
also been unified as much as possible to use default scoped
inner-classes.
Closes gh-7316
