Rake tasks for generating a SHA1 for use with the google maps API for Android.

android_google_maps.rake

# keystore vars
keystore = 'path_to_your.keystore'
keystore_alias = 'alias_for_your_keystore'
keystore_password = 'password_for_your_keystore'

namespace :android do
  namespace :google do
    namespace :maps do
      desc 'Generates a debug SHA1 specific to your machine.'
      task :debug_sha do
        puts `keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android`
        print_api_key_instructions
      end
      desc 'Lists aliases within the keystore file.'
      task :list_aliases do
        puts "password: #{keystore_password}"
        puts `keytool -list -keystore #{keystore}`
      end
      desc 'Generates a release SHA1 specific to your machine.'
      task :release_sha do
        puts "password: #{keystore_password}"
        puts `keytool -list -v -keystore #{keystore} -alias #{keystore_alias}`
        print_api_key_instructions
      end
    end
  end
end

def print_api_key_instructions
  puts ''
  puts '*** INSTRUCTIONS TO CREATE THE ACTUAL KEY ***'
  puts 'Use the SHA1 to generate a google maps api key.'
  puts 'Visit: https://console.developers.google.com'
  puts 'Turn on: APIs & auth > APIs > Google Maps Android API v2'
  puts 'Then: APIs & auth > Credentials > Create new key > Android Key'
  puts 'Use the SHA1 with a semicolon and the package name at the end: SHA1;com.example.yourapp'
  puts 'Add the generated API Key to the AndroidManifest.xml'
  puts ''
end