Merge with Fabric 1.1, stage 1

src/main/java/dev/architectury/loom/metadata/ModMetadataFiles.java

@@ -0,0 +1,58 @@
+package dev.architectury.loom.metadata;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Map;
+import java.util.function.Function;
+
+import com.google.common.collect.ImmutableMap;
+import org.gradle.api.tasks.SourceSet;
+import org.jetbrains.annotations.Nullable;
+
+import net.fabricmc.loom.util.ZipUtils;
+import net.fabricmc.loom.util.gradle.SourceSetHelper;
+
+public final class ModMetadataFiles {
+	private static final Map<String, Function<byte[], ModMetadataFile>> SINGLE_FILE_METADATA_TYPES = ImmutableMap.<String, Function<byte[], ModMetadataFile>>builder()
+			.put(ArchitecturyCommonJson.FILE_NAME, ArchitecturyCommonJson::of)
+			.put(QuiltModJson.FILE_NAME, QuiltModJson::of)
+			.build();
+
+	public static @Nullable ModMetadataFile fromJar(Path jar) throws IOException {
+		for (final String filePath : SINGLE_FILE_METADATA_TYPES.keySet()) {
+			final byte @Nullable [] bytes = ZipUtils.unpackNullable(jar, filePath);
+
+			if (bytes != null) {
+				return SINGLE_FILE_METADATA_TYPES.get(filePath).apply(bytes);
+			}
+		}
+
+		return null;
+	}
+
+	public static @Nullable ModMetadataFile fromDirectory(Path directory) throws IOException {
+		for (final String filePath : SINGLE_FILE_METADATA_TYPES.keySet()) {
+			final Path metadataPath = directory.resolve(filePath);
+
+			if (Files.exists(metadataPath)) {
+				return SINGLE_FILE_METADATA_TYPES.get(filePath).apply(Files.readAllBytes(directory));
+			}
+		}
+
+		return null;
+	}
+
+	public static @Nullable ModMetadataFile fromSourceSets(SourceSet... sourceSets) throws IOException {
+		for (final String filePath : SINGLE_FILE_METADATA_TYPES.keySet()) {
+			final @Nullable File file = SourceSetHelper.findFirstFileInResource(filePath, sourceSets);
+
+			if (file != null) {
+				return SINGLE_FILE_METADATA_TYPES.get(filePath).apply(Files.readAllBytes(file.toPath()));
+			}
+		}
+
+		return null;
+	}
+}