sonatype.gradle

// Create variables with empty default values
ext["ossrhUsername"] = ''
ext["ossrhPassword"] = ''
ext["signingKey"] = ''
ext["signingKeyId"] = ''
ext["signingPassword"] = ''
ext["sonatypeStagingProfileId"] = ''

//File localPropsFile = project.rootProject.file('local.properties')
//if (localPropsFile.exists()) {
//    // Read local.properties file first if it exists
//    Properties p = new Properties()
//    new FileInputStream(localPropsFile).withCloseable { is -> p.load(is) }
//    p.each { name, value -> ext[name] = value }
//} else {
    // Use system environment variables
    ext["ossrhUsername"] = System.getenv('OSSRH_USERNAME')
    ext["ossrhPassword"] = System.getenv('OSSRH_PASSWORD')
    ext["sonatypeStagingProfileId"] = System.getenv('SONATYPE_STAGING_PROFILE_ID')
    ext["signingKey"] = System.getenv('SIGNING_KEY')
    ext["signingKeyId"] = System.getenv('SIGNING_KEY_ID')
    ext["signingPassword"] = System.getenv('SIGNING_PASSWORD')

//}

// Set up Sonatype repository
nexusPublishing {
    repositories {
        sonatype {
            stagingProfileId = sonatypeStagingProfileId
            username = ossrhUsername
            password = ossrhPassword
            nexusUrl.set(uri("https://s01.oss.sonatype.org/service/local/"))
            snapshotRepositoryUrl.set(uri("https://s01.oss.sonatype.org/content/repositories/snapshots/"))
        }
    }
}