upload to bintray gradle task. Probably should consider making this a gradle plugin

gistfile1.groovy

task uploadToBintray(dependsOn: ["prepareForBintrayUpload", "publishBintrayPackages"])

task prepareForBintrayUpload << {

    if (version.contains("SNAPSHOT")) {
        println "bintray does not support SNAPSHOTs, skipping upload to bintray"
        uploadArchives.enabled = false
        publishBintrayPackages.enabled = false
        return
    }

    if (!project.hasProperty("bintrayUsername")) {
        println "bintray credentials not setup, skipping upload to bintray"
        uploadArchives.enabled = false
        publishBintrayPackages.enabled = false
        return
    }

    def json = new URL("https://api.bintray.com/packages/upennlib/metridoc/metridoc-job-core").text
    def slurper = new JsonSlurper()
    def versions = slurper.parseText(json).versions
    def versionAlreadyDeployed = versions.contains(version)

    if (versionAlreadyDeployed) {
        println "version $version has already been deployed to bintray, skipping upload to bintray"
        uploadArchives.enabled = false
        publishBintrayPackages.enabled = false
    }
}

task publishBintrayPackages(dependsOn: "uploadArchives") << {
    def client = new RESTClient("https://api.bintray.com/")
    client.authorization = new HTTPBasicAuthorization(bintrayUsername, bintrayPassword)
    def response = client.post(
            path: "/content/upennlib/metridoc/metridoc-job-core/$version/publish",
            accept: ContentType.JSON
    ) {
        type ContentType.JSON
        charset "utf-8"
        text ""
    }
    println response.getContentAsString()
    assert 200 == response.statusCode
}

this also requires the following addition to the build classpath:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.github.groovy-wslite:groovy-wslite:0.7.2'
    }
}