We build with Java 8, 11, and 13 without specifying target
compatibility for the bytecode of the app that's placed in the image.
The built image uses Java 11 and when the app is built with Java 13
it fails to start as the Java 11 VM can't read that Java 13 bytecode.
This commit configures the app that's placed in the image to be built
with target compatibility of 1.8. This allows it to be compiled with
all version of Java with which we build and to also be compatible
with the JVM that's in the image.
See gh-19831
Update all dependencies declarations to use the form `scope(reference)`
rather than `scope reference`.
Prior to this commit we declared dependencies without parentheses unless
we were forced to add them due to an `exclude`.
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
Update Gradle archive tasks to ensure that `META-INF/` and
`META-INF/MANIFEST.MF` remain as the first entries of the archive.
Prior to this commit, rewritten archives would violate the implicit
specification of `JarInputStream` that these entries should be first.
Fixes gh-16698
