tree/publish.gradle

// Copyright (C) 2017 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
if (project.ext.has("exoplayerPublishEnabled")
        && project.ext.exoplayerPublishEnabled) {
    apply plugin: 'bintray-release'
    publish {
        artifactId = releaseArtifact
        desc = releaseDescription
        publishVersion = releaseVersion
        repoName = getBintrayRepo()
        userOrg = 'google'
        groupId = 'com.google.android.exoplayer'
        website = 'https://github.com/google/ExoPlayer'
    }

    gradle.taskGraph.whenReady { taskGraph ->
        project.tasks
                .findAll { task -> task.name.contains("generatePomFileFor") }
                .forEach { task ->
                    task.doLast {
                        task.outputs.files
                                .filter { File file ->
                                    file.path.contains("publications") \
                                        && file.name.matches("^pom-.+\\.xml\$")
                                }
                                .forEach { File file -> addLicense(file) }
                    }
                }
    }
}

def getBintrayRepo() {
    boolean publicRepo = hasProperty('publicRepo') &&
        property('publicRepo').toBoolean()
    return publicRepo ? 'exoplayer' : 'exoplayer-test'
}

static void addLicense(File pom) {
    def licenseNode = new Node(null, "license")
    licenseNode.append(
        new Node(null, "name", "The Apache Software License, Version 2.0"))
    licenseNode.append(
        new Node(null, "url", "http://www.apache.org/licenses/LICENSE-2.0.txt"))
    licenseNode.append(new Node(null, "distribution", "repo"))
    def licensesNode = new Node(null, "licenses")
    licensesNode.append(licenseNode)

    def xml = new XmlParser().parse(pom)
    xml.append(licensesNode)

    def writer = new PrintWriter(new FileWriter(pom))
    writer.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n")
    def printer = new XmlNodePrinter(writer)
    printer.preserveWhitespace = true
    printer.print(xml)
    writer.close()
}