fastlane: Cannot set `apk_path` dynamically for Crashlytics

# Customise this file, documentation can be found here:
# https://github.com/fastlane/fastlane/tree/master/fastlane/docs
# All available actions: https://docs.fastlane.tools/actions
# can also be listed using the `fastlane actions` command


# Jaime: see examples at https://github.com/fastlane/examples/blob/master/Fabric/Fastfile


# Change the syntax highlighting to Ruby
# All lines starting with a # are ignored when running `fastlane`

# If you want to automatically update fastlane if a new version is available:
# update_fastlane

# This is the minimum version number required.
# Update this, if you use features of a newer version
fastlane_version "2.28.3"

default_platform :android

platform :android do

  before_all do
    git_pull(only_tags: true)
    # ENV["SLACK_URL"] = "https://hooks.slack.com/services/..."
  end

  after_all do
    push_git_tags
  end


  desc "Runs all the tests"
  lane :test do
    gradle(task: "test")
  end


  def load_keys
    begin
      import("keys")
    rescue => exception
      UI.error("fastlane/keys file not found. To use this Fastfile, copy fastlane/keys.template into fastlane/keys and fill in the values")
      raise exception
    end
  end


# see https://docs.fastlane.tools/actions/#changelog_from_git_commits
# see https://github.com/fastlane/fastlane/blob/master/fastlane/spec/actions_specs/changelog_from_git_commits_spec.rb
  def change_log_since_last_tag
      # http://git-scm.com/docs/pretty-formats
      # <short hash> <commit title>
      return  changelog_from_git_commits(merge_commit_filtering: 'exclude_merges', pretty: '%s')
      #return changelog_from_git_commits(pretty: '%h %s')
  end


  desc "Returns a default changelog."
  lane :default_changelog do

  end

  desc "Submit a new Beta Build to Crashlytics Beta"
  lane :beta do |options|
#    ensure_git_status_clean

    gradle(
      task: "assemble",
      build_type: 'beta'
    )

    load_keys

    # Generate the changelog based on commit messages since your last tag

    #changelog_from_git_commits
#      notifications = false unless options[:notify_testers],
#    changes =


    changelog = changelog_from_git_commits(
        between: [ENV['GIT_PREVIOUS_SUCCESSFUL_COMMIT'] || "HEAD^^^^^", "HEAD"],
        pretty: "- %s"
    )
    # HAX: strip emoji from changelog
#    changelog = changelog.sub(/[\u{1F300}-\u{1F6FF}]/, '')
#    Actions.lane_context[SharedValues::FL_CHANGELOG] = changelog
    puts changelog


    # The crashlytics action knows how to use the generated changelog automatically
    crashlytics(
      api_token: ENV["CRASHLYTICS_API_TOKEN"],
      build_secret: ENV["CRASHLYTICS_BUILD_SECRET"],
#      apk_path: lane_context[SharedValues::GRADLE_APK_OUTPUT_PATH],
      apk_path: "./app/build/outputs/apk/app-beta-0.0.1-BETA-unaligned.apk",
      apk_path: "/Users/jaime/Github/MYPROJECT/android/MYPROJECT/app/build/outputs/apk/app-beta*.apk",
      notes: changelog
#      notes:  change_log_since_last_tag,
#      groups: ["first_beta_testers"]
    )
    # sh "your_script.sh"
    # You can also use other beta testing services here
  end

  desc "Deploy a new version to the Google Play"
  lane :deploy do
    gradle(task: "assembleRelease")
    supply
  end

  # You can define as many lanes as you want

  after_all do |lane|
    # This block is called, only if the executed lane was successful

    # slack(
    #   message: "Successfully deployed new App Update."
    # )
  end

  error do |lane, exception|
    # slack(
    #   message: exception.message,
    #   success: false
    # )
  end
end


# More information about multiple platforms in fastlane: https://github.com/fastlane/fastlane/blob/master/fastlane/docs/Platforms.md
# All available actions: https://docs.fastlane.tools/actions

# fastlane reports which actions are used
# No personal data is sent or shared. Learn more at https://github.com/fastlane/enhancer

json_key_file "" # Path to the json secret file - Follow https://github.com/fastlane/supply#setup to get one
package_name "site.paid2party.android" # e.g. com.krausefx.app