Kotlin
Changed documentation regarding extension properties api
Fixes https://github.com/Kotlin/dataframe/issues/635 more explicit explanation of what happens in between cell calls in the extension properties api in notebooks
Jar tool validates that public API does not diverge between classes for different release versions and prints something like:
entry: META-INF/versions/11/Specific.class, contains a new public class not found in base entries
entry: META-INF/versions/11/Common.class, contains a class with different api from earlier version
invalid multi-release jar file mrj.jar deleted
@Sineaggi, do you experience issues with invalid multi-release jars? Could you please elaborate on how these jars were created (manually, via gradle/maven/etc. plugin)?
I'm using gradle to create the jars.
tasks.jar {
from(compileJava9Java.flatMap { it.destinationDirectory }) {
into("META-INF/versions/9")
}
manifest {
attributes["Multi-Release"] = "true"
}
}
I'm guessing Gradle doesn't use the jar tool to create jars.
Ok so building a new tar task that calls the java jar tool does properly warn.
entry: META-INF/versions/9/org/example/Common.class, contains a class with different api from earlier version
invalid multi-release jar file /Users/cwalker/git/mrjar-compat-check/build/libs/mrjar-compat-check-jar.jar deleted
FAILURE: Build failed with an exception.
Maybe this is better suited to an issue upstream in Gradle.
Was able to get a gradle task to validate the jar produced by gradle
tasks.register<JavaExec>("validateJar") {
mainModule = "jdk.jartool/sun.tools.jar.Main"
val jarFile = tasks.jar.flatMap { it.archiveFile }
inputs.file(jarFile)
argumentProviders.plusAssign(CommandLineArgumentProvider {
listOf(
"--validate",
"--file",
jarFile.get().toString(),
)
})
}
The jar tool is relatively slow and doesn't have enough options which is why almost every build tool uses something else. A jar is, after all, just a zip. They optimize for performance.
I wonder if the speed of jar --validate as a check task would work be a blocker for general builds?
I can't find any documentation, but it looks like jar --validate was added in java 17.
EDIT: here JDK-8266835