Fix Platform#getFilePath not returning the *root* file path on Forge (#269)

* Platform#getFilePath now actually returns the *root* path on forge

Signed-off-by: Max <maxh2709@gmail.com>

* Add Mod#findResource (please stop yelling at me now kthx)

Signed-off-by: Max <maxh2709@gmail.com>

common/src/main/java/dev/architectury/platform/Mod.java

@@ -61,6 +61,15 @@ public interface Mod {
     @Deprecated(forRemoval = true)
     Path getFilePath();
     
+    /**
+     * Gets an NIO Path to the given resource contained within the mod file / folder.
+     * The path is verified to exist, and an empty optional is returned if it doesn't.
+     *
+     * @param path The resource to search for
+     * @return The path of the resource if it exists, or {@link Optional#empty()} if it doesn't
+     */
+    Optional<Path> findResource(String... path);
+    
     Collection<String> getAuthors();
     
     @Nullable

fabric/src/main/java/dev/architectury/platform/fabric/PlatformImpl.java

@@ -132,7 +132,12 @@ public class PlatformImpl {
         public Path getFilePath() {
             return container.getRootPath();
         }
-        
+    
+        @Override
+        public Optional<Path> findResource(String... path) {
+            return container.findPath(String.join("/", path));
+        }
+    
         @Override
         public Collection<String> getAuthors() {
             return metadata.getAuthors().stream()

forge/src/main/java/dev/architectury/platform/forge/PlatformImpl.java

@@ -35,6 +35,7 @@ import org.jetbrains.annotations.Nullable;
 
 import javax.annotation.Nonnull;
 import java.net.URL;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
@@ -126,15 +127,20 @@ public class PlatformImpl {
         public Optional<String> getLogoFile(int i) {
             return this.info.getLogoFile();
         }
-    
+        
         @Override
         public List<Path> getFilePaths() {
             return List.of(getFilePath());
         }
-    
+        
         @Override
         public Path getFilePath() {
-            return this.info.getOwningFile().getFile().getFilePath();
+            return this.info.getOwningFile().getFile().getSecureJar().getRootPath();
+        }
+        
+        @Override
+        public Optional<Path> findResource(String... path) {
+            return Optional.of(this.info.getOwningFile().getFile().findResource(path)).filter(Files::exists);
         }
         
         @Override