TeamCity Gradle Changelog.gradle

/**
 * Generates a TeamCity XML changelog via the REST API.
 */
task("createChangelog").doLast {

    def teamCityURL = "http://ci.calclavia.com/"

    /**
     * Create a new file
     */
    def file = new FileOutputStream("output/changelog.xml")
    def out = new BufferedOutputStream(file)

    /**
     * Grab the build first, parse the XML to find the changelog XML URL
     */
    def changesXML = new XmlSlurper().parse(teamCityURL + "guestAuth/app/rest/changes?locator=build:(id:" + teamcity["teamcity.build.id"] + ")")
    def changes = changesXML.change

    /**
     * Add the XML definition header in the front of the file and remove all other occurrences of the XML header
     */
    out << ("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><changes>")

    println("createChangelog: Identified " + changes.size() + " changes to be written into the changelog.")

    for (int i = 0; i < changes.size(); i++) {
        /**
         * Write each changelog XML into the URL
         */
        def changelogURL = teamCityURL + "httpAuth/app/rest/changes/id:" + changes[i].@id.text()
        out << get(new URL(changelogURL), "username", "pass").replaceAll("<\\?xml version=\"1\\.0\" encoding=\"UTF-8\" standalone=\"yes\"\\?>", "")
    }

    out << "</changes>"

    out.close()
}

String get(URL url, String username, String pass) {
    dev connect = url.openConnection()
    connect.setRequestProperty("Authorization", "Basic "+ (username + ":" + pass).bytes.encodeBase64().toString())
    def stream = connect.getInputStream()
    def out = stream.getText();
    stream.close();
    return out;
}