code_coverage_build.rb

#!/usr/bin/env ruby

require 'yaml'

def find_value_for_key(yaml_file, key)
  yaml_file.each do |yaml_key, yaml_value|
    if key == yaml_key
      return yaml_value
    end
  end
  
  return nil
end

if ARGV.length != 2
  puts "Usage: #{$PROGRAM_NAME} derived_data_path configuration_build_directory"
  exit 1
end

slather_file = '.slather.yml'

# Open the slather yaml
slather_yml = YAML.load_file(File.join(Dir.pwd, slather_file))

# Get the scheme name
scheme_name = find_value_for_key(slather_yml, 'scheme')

if scheme_name == nil
  puts "Couldn't find scheme in #{slather_file}"
end

# Find the Scheme app in build_path
derived_data_path = ARGV[0]
build_path = ARGV[1]
app_scheme_path = File.join(build_path, "#{scheme_name}.framework/", scheme_name)
puts "Running slather with app scheme path: #{app_scheme_path}"

system('slather', 'coverage', '--input-format', 'profdata', '-s', '--build-directory', derived_data_path, '--binary-file', app_scheme_path)