OpenSearch/x-pack/buildSrc/settings.gradle

File extrasDir = new File(settingsDir, '../..').getCanonicalFile()
if (extrasDir.name.endsWith('-extra') == false) {
  throw new GradleException("x-pack-elasticsearch must be checked out under an elasticsearch-extra directory, found ${extrasDir.name}")
}
File elasticsearchDir = new File(extrasDir.parentFile, extrasDir.name[0..-7])
if (elasticsearchDir.exists() == false) {
  throw new GradleException("${elasticsearchDir.name} is missing as a sibling to ${extrasDir.name}")
}

project(':').projectDir = new File(elasticsearchDir, 'buildSrc')