Support dragging project file to app icon to start extraction

- Add Xcode project document type to Info.plist
- Move defaults registration to -applicationWillFinishLaunching:
- Implement application:openURLs: to handle dragged URLs
  - Only the first URL is processed
  - Handling a single project file is the expected common case
- Resolves #58

Author: dempseyatgithub

BuildSettingExtractor/AppDelegate.m

@@ -240,9 +240,13 @@ - (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender
     return YES;
 }
 
-- (void)applicationDidFinishLaunching:(NSNotification *)notification {
+- (void)applicationWillFinishLaunching:(NSNotification *)notification {
     [[NSUserDefaults standardUserDefaults] tps_registerApplicationDefaults];
 }
 
+- (void)application:(NSApplication *)application openURLs:(NSArray<NSURL *> *)urls {
+    NSURL *fileURL = urls.firstObject;
+    if (fileURL) { [self processXcodeProjectAtURL:fileURL]; }
+}
 
 @end

BuildSettingExtractor/BuildSettingExtractor-Info.plist

@@ -4,6 +4,21 @@
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
+	<key>CFBundleDocumentTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeExtensions</key>
+			<array>
+				<string>xcodeproj</string>
+			</array>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>LSItemContentTypes</key>
+			<array>
+				<string>com.apple.xcode.project</string>
+			</array>
+		</dict>
+	</array>
 	<key>CFBundleExecutable</key>
 	<string>${EXECUTABLE_NAME}</string>
 	<key>CFBundleIconFile</key>