Fix performance issue with image repository

Author: TheEpicBlock

platform_api/src/main/java/net/modfest/platform/git/GitManagedPath.java

@@ -4,6 +4,7 @@
 import org.jspecify.annotations.NonNull;
 
 import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.function.Consumer;
 import java.util.function.Function;
 
@@ -35,6 +36,20 @@ public void write(Consumer<Path> runner) {
 		});
 	}
 
+	@Override
+	public void writePerformant(PerformantWriter runner) {
+		var editedPaths = new ArrayList<Path>();
+		runner.doWrite(this.path, editedPaths::add);
+		if (!editedPaths.isEmpty()) {
+			this.gitScope.runWithScopedGit(git -> {
+				for (var p : editedPaths) {
+					System.out.println("EE "+this.subPath+"/"+this.path.relativize(p));
+					git.add().addFilepattern(this.subPath+"/"+this.path.relativize(p)).call();
+				}
+			});
+		}
+	}
+
 	@Override
 	public void read(Consumer<Path> runner) {
 		runner.accept(this.path);

platform_api/src/main/java/net/modfest/platform/git/ManagedPath.java

@@ -10,8 +10,25 @@
  */
 public interface ManagedPath {
 	void write(Consumer<Path> runner);
+	/**
+	 * Serves the same function as {@link #write(Consumer)} but avoids having to diff the entire
+	 * folder. In order for this to work you MUST register/log all paths which you've edited
+	 */
+	void writePerformant(PerformantWriter runner);
 	void read(Consumer<Path> runner);
 	<R> R withRead(Function<Path, R> runner);
 	GitScope getCurrentScope();
 	void runWithScope(GitScope scope, Runnable r);
+
+	@FunctionalInterface
+	interface PerformantWriter {
+		void doWrite(Path pathToWriteTo, WriteLogger logger);
+	}
+
+	interface WriteLogger {
+		/**
+		 * @param path The path that was written to
+		 */
+		void logWrite(Path path);
+	}
 }

platform_api/src/main/java/net/modfest/platform/repository/ImageRepository.java

@@ -91,11 +91,12 @@ public void download(URI url, String id) {
 				var originalSha = originalScope.commitSha();
 				var gitScope = originalSha == null ? originalScope : new GitScope("Writing image for #"+originalSha);
 				this.imageStore.runWithScope(gitScope, () -> {
-					this.imageStore.write(path -> {
+					this.imageStore.writePerformant((path, logger) -> {
 						var writePath = path.resolve(id+"."+extension);
 						try {
 							Files.createDirectories(writePath.getParent());
 							Files.write(writePath, response.body(), StandardOpenOption.CREATE);
+							logger.logWrite(writePath);
 						} catch (IOException e) {
 							throw new RuntimeException(e);
 						}