Add mechanism to include newly introduced info subpaths

- Add code to include subpaths based on Xcode version
- Move new MetalLinker subpath to introduced subpaths in plist
- Resolves #69

Author: dempseyatgithub

BuildSettingExtractor/BuildSettingCommentGenerator.m

@@ -189,6 +189,23 @@ - (BOOL)loadBuildSettingInfo {
     if (subpathsToAdd) {
         buildSettingInfoSubpaths = [buildSettingInfoSubpaths arrayByAddingObjectsFromArray:subpathsToAdd];
     }
+    
+    // Add introduced subpaths that are valid in the version of Xcode we are using
+    subpathsToAdd = nil;
+    NSDictionary *introducedSubpaths = buildSettingInfoDict[@"introducedSubpathsByVersion"];
+    for (NSString *versionKey in [introducedSubpaths allKeys]) {
+        NSInteger minVersion = [versionKey integerValue];
+        if (xcodeVersion >= minVersion) {
+            if (!subpathsToAdd) {
+                subpathsToAdd = [NSMutableArray array];
+            }
+            [subpathsToAdd addObjectsFromArray:introducedSubpaths[versionKey]];
+        }
+    }
+    if (subpathsToAdd) {
+        buildSettingInfoSubpaths = [buildSettingInfoSubpaths arrayByAddingObjectsFromArray:subpathsToAdd];
+    }
+
 
     // Rather than track exactly what Xcode versions contain which files, group versions of an expected file in an array.
     // Log if no file in the group can be read in.

BuildSettingExtractor/BuildSettingInfoSubpaths.plist

@@ -49,6 +49,15 @@
 			</array>
 		</array>
 	</dict>
+	<key>introducedSubpathsByVersion</key>
+	<dict>
+		<key>1200</key>
+		<array>
+			<array>
+				<string>Contents/PlugIns/Xcode3Core.ideplugin/Contents/SharedSupport/Developer/Library/Xcode/Plug-ins/Metal.xcplugin/Contents/Resources/MetalLinker.strings</string>
+			</array>
+		</array>
+	</dict>
 	<key>subpaths</key>
 	<array>
 		<array>
@@ -76,9 +85,6 @@
 			<string>Contents/PlugIns/Xcode3Core.ideplugin/Contents/SharedSupport/Developer/Library/Xcode/Plug-ins/Metal.xcplugin/Contents/Resources/Metal Compiler.strings</string>
 			<string>Contents/PlugIns/Xcode3Core.ideplugin/Contents/SharedSupport/Developer/Library/Xcode/Plug-ins/Metal.xcplugin/Contents/Resources/MetalCompiler.strings</string>
 		</array>
-		<array>
-			<string>Contents/PlugIns/Xcode3Core.ideplugin/Contents/SharedSupport/Developer/Library/Xcode/Plug-ins/Metal.xcplugin/Contents/Resources/MetalLinker.strings</string>
-		</array>
 		<array>
 			<string>Contents/PlugIns/Xcode3Core.ideplugin/Contents/SharedSupport/Developer/Library/Xcode/Plug-ins/Core Data.xcplugin/Contents/Resources/en.lproj/com.apple.compilers.model.coredata.strings</string>
 			<string>Contents/PlugIns/Xcode3Core.ideplugin/Contents/SharedSupport/Developer/Library/Xcode/Plug-ins/Core Data.xcplugin/Contents/Resources/English.lproj/com.apple.compilers.model.coredata.strings</string>