Diff Swift interface classes

.github/workflows/verify-public-interface.yml

@@ -68,11 +68,12 @@ jobs:
           -output "./StripePaymentSheet-new.xcframework"
 
           echo "Generating public interface diff..."
-          xcrun swift-api-digester \
-          -diagnose-sdk \
-          -input-paths StripePaymentSheet-master.xcframework/ios-arm64_x86_64-simulator/StripePaymentSheet.framework/Modules/StripePaymentSheet.swiftmodule/x86_64-apple-ios-simulator.abi.json \
-          -input-paths StripePaymentSheet-new.xcframework/ios-arm64_x86_64-simulator/StripePaymentSheet.framework/Modules/StripePaymentSheet.swiftmodule/x86_64-apple-ios-simulator.abi.json
-
+          
+          export API_DIFF=$(ruby ci_scripts/diff_pubilc_interface.rb \
+          StripePaymentSheet-master.xcframework/ios-arm64_x86_64-simulator/StripePaymentSheet.framework/Modules/StripePaymentSheet.swiftmodule/x86_64-apple-ios-simulator.abi.json \
+          StripePaymentSheet-new.xcframework/ios-arm64_x86_64-simulator/StripePaymentSheet.framework/Modules/StripePaymentSheet.swiftmodule/x86_64-apple-ios-simulator.abi.json)
+          
+          echo "API_DIFF=$API_DIFF" >> $GITHUB_ENV
 
       - name: Check for modified or added APIs
         id: check-api
@@ -96,7 +97,7 @@ jobs:
           body: |
             ⚠️ Change in public APIs detected:
 
-            ```
+            ```diff
             ${{ env.API_DIFF }}
             ```
 

ci_scripts/diff_public_interface.rb

@@ -0,0 +1,20 @@
+require 'open3'
+
+def diff(old_path, new_path)
+  stdout, _stderr, _status = Open3.capture3("diff", "-u", old_path, new_path)
+
+  stdout.lines.map do |line|
+    case line[0..1]
+    when "+ " then "+ #{line[2..-1].strip}"
+    when "- " then "- #{line[2..-1].strip}"
+    else nil
+    end
+  end.compact.join("\n")
+end
+
+if ARGV.length < 2
+  puts "Please provide two files to diff."
+  exit
+end
+
+puts diff(ARGV[0], ARGV[1])