Useful gist for loading Gradle properties from files

propertiesLoader.gradle

// Load properties from file in the way recommended by Android docs
//
// Usage:
// def keystoreProperties = loadProperties("keystore.properties")
// ...
// android {
// ...
// signingConfigs {
//  releaseConfig {
//    keyAlias keystoreProperties['keyAlias']
//    keyPassword keystoreProperties['keyPassword']
//    storeFile file(keystoreProperties['storeFile'])
//    storePassword keystoreProperties['storePassword']
//  }
// ...

ext.loadProperties = { propertiesName ->
  def propertiesFile = rootProject.file(propertiesName)
  def properties = new Properties()
  properties.load(new FileInputStream(propertiesFile))
  return properties
}