Add method to inject Test Analytics env value in xctestrun in Fastlane

Author: mokagio

.rubocop.yml

@@ -2,6 +2,9 @@ Metrics/BlockLength:
   Exclude:
     - fastlane/Fastfile
 
+Metrics/MethodLength:
+  Max: 20
+
 Style/AsciiComments:
   Exclude:
     - fastlane/Fastfile

fastlane/Fastfile

@@ -1105,3 +1105,37 @@ def trigger_buildkite_release_build(branch:, beta:)
     pipeline_file: 'release-builds.yml'
   )
 end
+
+def inject_buildkite_analytics_environment(xctestrun_path:)
+  require 'plist'
+
+  xctestrun = Plist.parse_xml(xctestrun_path)
+  xctestrun['TestConfigurations'].each do |configuration|
+    configuration['TestTargets'].each do |target|
+      TEST_ANALYTICS_ENVIRONMENT.each do |key|
+        value = ENV.fetch(key)
+        next if value.nil?
+
+        target['EnvironmentVariables'][key] = value
+      end
+    end
+  end
+
+  File.write(xctestrun_path, Plist::Emit.dump(xctestrun))
+end
+
+def buildkite_ci?
+  ENV.fetch('BUILDKITE', false)
+end
+
+# https://buildkite.com/docs/test-analytics/ci-environments
+TEST_ANALYTICS_ENVIRONMENT = %w[
+  BUILDKITE_ANALYTICS_TOKEN
+  BUILDKITE_BUILD_ID
+  BUILDKITE_BUILD_NUMBER
+  BUILDKITE_JOB_ID
+  BUILDKITE_BRANCH
+  BUILDKITE_COMMIT
+  BUILDKITE_MESSAGE
+  BUILDKITE_BUILD_URL
+].freeze