This commit adds a `Build-Jdk-Spec` attribute to the manifest in a
jar or war file built with the Spring Boot Gradle plugin. This
aligns the Gradle plugin's behavior with the default Maven plugin
behavior.
This removes the need to set a `BP_JVM_VERSION` environment variable
when invoking Cloud Native Buildpacks, as the Paketo buildpacks will
honor `Build-Jdk-Spec` in a jar or war manifest to determine the
default JVM version.
Fixes gh-32829
Using the outputs from `distZip` and `bootDistZip` as input to the
`bootBuildImage` task instead of indirectly using the output file
path prevents Gradle warnings about implicit task dependencies.
Fixes gh-32506
Paketo Java buildpack version 6.0.0 adds a buildpack and removes
support for the SBOM in the format that the system tests attempt
to verify.
Fixes gh-28823
A new system test plugin is being made available for running test
suites that should be run less frequently than with every commit, such
as tests that verify Spring Boot compatibility with external
projects. CI pipeline configuration for running system tests is also
provided.
The first system tests verify the behavior of the Spring Boot image
building plugins when building images using Paketo buildpacks.
Closes gh-25824
Andrey Somov
Scott Frederick
Phillip Webb
Andy Wilkinson
Johnny Lim
Stephane Nicoll
dreis2211