build.gradle

import java.nio.file.Files
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING

apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'maven-publish'

group 'org.logstash.plugins.outputs.s3'
version "${new File("VERSION").text.trim()}"

description = "A Logstash plugin uploads events to Amazon Simple Storage Service (Amazon S3)."

sourceCompatibility = 1.8
targetCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'junit:junit:4.12'
    testImplementation 'org.apache.logging.log4j:log4j-core:2.17.0'
    compileOnly 'org.apache.logging.log4j:log4j-api:2.17.0'
}

tasks.withType(JavaCompile) {
    options.encoding = 'UTF-8'
}

task run (type: JavaExec, dependsOn: classes) {
    if (project.hasProperty('providedargs')) {
        args(providedargs.split(','))
    }
    classpath = sourceSets.main.runtimeClasspath
}

task generateGemJarRequiresFile {
    doLast {
        File jars_file = file('lib/logstash-output-s3_jars.rb')
            jars_file.newWriter().withWriter { w ->
                w << "# AUTOGENERATED BY THE GRADLE SCRIPT. DO NOT EDIT.\n\n"
                    w << "require \'jar_dependencies\'\n"
                    configurations.runtimeClasspath.allDependencies.each {
                        w << "require_jar(\'${it.group}\', \'${it.name}\', \'${it.version}\')\n"
                    }
                w << "require_jar(\'${project.group}\', \'${project.name}\', \'${project.version}\')\n"
            }
    }
}

task vendor {
    doLast {
        String vendorPathPrefix = "vendor/jar-dependencies"
            configurations.runtimeClasspath.allDependencies.each { dep ->
                File f = configurations.runtimeClasspath.filter { it.absolutePath.contains("${dep.group}/${dep.name}/${dep.version}") }.singleFile
                    String groupPath = dep.group.replaceAll('\\.', '/')
                    File newJarFile = file("${vendorPathPrefix}/${groupPath}/${dep.name}/${dep.version}/${dep.name}-${dep.version}.jar")
                    newJarFile.mkdirs()
                    Files.copy(f.toPath(), newJarFile.toPath(), REPLACE_EXISTING)
            }
        String projectGroupPath = project.group.replaceAll('\\.', '/')
            File projectJarFile = file("${vendorPathPrefix}/${projectGroupPath}/${project.name}/${project.version}/${project.name}-${project.version}.jar")
            projectJarFile.mkdirs()
            Files.copy(file("$buildDir/libs/${project.name}-${project.version}.jar").toPath(), projectJarFile.toPath(), REPLACE_EXISTING)
    }
}

vendor.dependsOn(jar, generateGemJarRequiresFile)

publishing {
  publications {
    mavenJava(MavenPublication) {
      from components.java
    }
  }
}