Upgrade the R.swift binary itself to Swift 2.3

Author: mac-cain13

R.swift.xcodeproj/project.pbxproj

@@ -380,9 +380,11 @@
 				TargetAttributes = {
 					D5C4227C1B711FDF004EA9B9 = {
 						CreatedOnToolsVersion = 7.0;
+						LastSwiftMigration = 0800;
 					};
 					D5EA0DF31A3DF45600FFEBC4 = {
 						CreatedOnToolsVersion = 6.1.1;
+						LastSwiftMigration = 0800;
 					};
 				};
 			};
@@ -562,6 +564,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = nl.mathijskadijk.rswiftTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -576,6 +579,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = nl.mathijskadijk.rswiftTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};
@@ -659,13 +663,15 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
 		D5EA0DFD1A3DF45600FFEBC4 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};

R.swift/ResourceTypes/Font.swift

@@ -16,7 +16,9 @@ struct Font: WhiteListedExtensionsResourceType {
   init(url: NSURL) throws {
     try Font.throwIfUnsupportedExtension(url.pathExtension)
 
-    let dataProvider = CGDataProviderCreateWithURL(url)
+    guard let dataProvider = CGDataProviderCreateWithURL(url) else {
+      throw ResourceParsingError.ParsingFailed("Unable to create data provider for font at \(url)")
+    }
     let font = CGFontCreateWithDataProvider(dataProvider)
 
     guard let postScriptName = CGFontCopyPostScriptName(font) else {

R.swift/input.swift

@@ -142,9 +142,9 @@ struct CallInformation {
       let outputURL = NSURL(fileURLWithPath: outputPath)
 
       var resourceValue: AnyObject?
-      try! outputURL.getResourceValue(&resourceValue, forKey: NSURLIsDirectoryKey)
+      try outputURL.getResourceValue(&resourceValue, forKey: NSURLIsDirectoryKey)
       if let isDirectory = (resourceValue as? NSNumber)?.boolValue where isDirectory {
-        self.outputURL = outputURL.URLByAppendingPathComponent(ResourceFilename, isDirectory: false)
+        self.outputURL = outputURL.URLByAppendingPathComponent(ResourceFilename, isDirectory: false)!
       } else {
         self.outputURL = outputURL
       }
@@ -203,7 +203,7 @@ private func getFirstArgumentFromOptionData(options: [Option:[String]], helpStri
     }
 }
 
-func pathResolverWithSourceTreeFolderToURLConverter(URLForSourceTreeFolder: SourceTreeFolder -> NSURL) -> (path: Path) -> NSURL {
+func pathResolverWithSourceTreeFolderToURLConverter(URLForSourceTreeFolder: SourceTreeFolder -> NSURL) -> (path: Path) -> NSURL? {
     return { path in
         switch path {
         case let .Absolute(absolutePath):

R.swift/main.swift

@@ -24,6 +24,7 @@ do {
   let xcodeproj = try Xcodeproj(url: callInformation.xcodeprojURL)
   let resourceURLs = try xcodeproj.resourcePathsForTarget(callInformation.targetName)
     .map(pathResolverWithSourceTreeFolderToURLConverter(callInformation.URLForSourceTreeFolder))
+    .flatMap { $0 }
 
   let resources = Resources(resourceURLs: resourceURLs, fileManager: NSFileManager.defaultManager())