Draft impl of app-thinning.plist parsing

Author: AliSoftware

lib/fastlane/plugin/wpmreleasetoolkit/actions/ios/ios_send_app_size_metrics.rb

@@ -12,9 +12,16 @@ def self.run(params)
         )
         payload.add_metric(name: 'File Size', value: File.size(params[:ipa_path]))
 
-        if File.exist?(params[:app_thinning_plist_path])
-          plist = Plist.parse_xml(params[:app_thinning_plist_path])
-          payload.add_metric(name: 'plist', value: plist) # TODO: Parse the actual plist
+        app_thinning_plist_path = params[:app_thinning_plist_path] || File.join(File.dirname(params[:ipa_path]), 'app-thinning.plist')
+        if File.exist?(app_thinning_plist_path)
+          plist = Plist.parse_xml(app_thinning_plist_path)
+          plist['variants'].each do |_key, variant|
+            # FIXME: We should probably not take only the first `variantDescriptor` from the list. But that'll do for now as a draft implementation.
+            vd = variant['variantDescriptors']&.first
+            variant_metadata = vd.nil? ? { device: 'Universal' } : { device: vd['device'], 'OS Version': vd['os-version'] }
+            payload.add_metric(name: 'Download Size', value: variant['sizeCompressedApp'], meta: variant_metadata)
+            payload.add_metric(name: 'Install Size', value: variant['sizeUncompressedApp'], meta: variant_metadata)
+          end
         end
 
         payload.send_metrics(