elasticsearch use a custom 3rd party artifact - elasticsearch

Question

How can I use a custom 3rd party artifact in ElasticSearch locally ?
From docs
Update the dependency declaration of the artifact in question to match
the custom build version. For a file named e.g. jmxri-1.2.1.jar the
dependency definition would be :jmxri:1.2.1 as it comes with no group
information:
But I get an exception because getGroup returns null
Steps to reproduce
clone elasticseach into /tmp
create a directory /tmp/elasticsearch/localRepo
add to (root) build.gradle allprojects here the following
allprojects {
repositories {
flatDir {
dirs 'localRepo'
}
}
}
my local jar is /tmp/elasticsearc/localRepo/test-3.2.1.jar
add here
api ':test:3.2.1'
run ./gradlew localDistro
Error message
FAILURE: Build completed with 2 failures.
1: Task failed with an exception.
-----------
* Where:
Build file '/tmp/elasticsearch/client/sniffer/build.gradle' line: 41
* What went wrong:
A problem occurred evaluating project ':client:sniffer'.
> Cannot invoke "String.startsWith(String)" because the return value of "org.gradle.api.artifacts.Dependency.getGroup()" is null
2: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring project ':client:sniffer'.
> Cannot invoke "java.lang.Comparable.compareTo(Object)" because the return value of "java.util.function.Function.apply(Object)" is null
BUILD FAILED in 925ms
19 actionable tasks: 19 up-to-date

Answer 1

Dependencies always need a group set like
"group:module:version"
You also need that for flatDir repositories but the group doesn't matter and can be anything as far as I know. I used "test" in the example below
repositories {
flatDir {
dirs(" /tmp/elasticsearch/localRepo")
}
}
dependencies {
api 'test:test:3.2.1'
}