Configure swiftformat + modify license CI check (#247)

* Implement swiftformat to auto-format sample code

* Add format build phase to MobileBuyIntegration

.github/workflows/lint.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - run: ./Scripts/copy_license && git diff --name-only --exit-code
+      - run: ./Scripts/ensure_license
 
   lint-podspec:
     name: CocoaPods

.swiftformat

@@ -0,0 +1,9 @@
+--indent 4
+--linebreaks lf
+--wraparguments before-first
+--wrapcollections before-first
+--commas inline
+--allman false
+--semicolons inline
+--trimwhitespace always
+--disable redundantReturn

Samples/MobileBuyIntegration/MobileBuyIntegration.xcodeproj/project.pbxproj

@@ -174,6 +174,7 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 4EBBA77B2A5F0CE200193E19 /* Build configuration list for PBXNativeTarget "MobileBuyIntegration" */;
 			buildPhases = (
+				6A9124C62CF6114E0076C21C /* Run Swiftformat over sample code */,
 				4EBBA7632A5F0CE200193E19 /* Sources */,
 				4EBBA7642A5F0CE200193E19 /* Frameworks */,
 				4EBBA7652A5F0CE200193E19 /* Resources */,
@@ -264,6 +265,24 @@
 			shellPath = /bin/sh;
 			shellScript = "# Remove .pcm binaries from build\nfind \"${TARGET_BUILD_DIR}/${FULL_PRODUCT_NAME}\" -name \"*.pcm\" -type f -delete\n\n# Remove Swiftlint binaries from build\nfind \"${TARGET_BUILD_DIR}/${FULL_PRODUCT_NAME}\" -iname \"swiftlint*\" -type f -delete\n\n\n\n";
 		};
+		6A9124C62CF6114E0076C21C /* Run Swiftformat over sample code */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			name = "Run Swiftformat over sample code";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "export PATH=\"/opt/homebrew/bin:$PATH\"\n\nif which swiftformat >/dev/null; then\n\tswiftformat \"${SRCROOT}\" \nelse  \n\techo \"error: SwiftFormat not installed, download using \\\"brew install swiftformat\\\"\"\nfi\n";
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */

Scripts/ensure_license

@@ -0,0 +1,29 @@
+#!/usr/bin/env ruby
+
+require 'find'
+
+# Read and normalize the license text by removing extra whitespace
+license_text = "/*\n" + File.read('LICENSE') + "*/\n"
+normalized_license = license_text.gsub(/\s+/, ' ').strip
+
+Find.find('.') do |path|
+  next unless File.file?(path) && path.end_with?('.swift') && !path.end_with?('Package.swift')
+
+  # Read the current content of the Swift file
+  content = File.read(path)
+
+  # Extract the existing license part from the file, if present
+  if content =~ /\A\s*\/\*.*?\*\//m
+    existing_license = $&.gsub(/\s+/, ' ').strip
+  else
+    existing_license = ""
+  end
+
+  # Check if the existing license matches the normalized expected license
+  if existing_license != normalized_license
+    puts "License missing or incorrect in file: #{path}"
+    exit 1
+  else
+    puts "✔️ #{path}"
+  end
+end