Add support for reading/writing zipped mappings (#199)

* Add support to read/write Enigma mappings from ZIP

Takes any path which points to a ZIP as wanting to be read/written as a ZIP
Paths from an existing ZIP file system will be correctly handled as directories

* Fix deleting a path needing to be from the default file system

* Allow calling MapSpecializedMethodsCommand directly

* Fix indentation

* Missing static

3 files changed, 12 insertions, 5 deletions

diff --git a/src/main/java/cuchaz/enigma/command/Command.java b/src/main/java/cuchaz/enigma/command/Command.java
index d53ed6e..09dd321 100644
--- a/src/main/java/cuchaz/enigma/command/Command.java
+++ b/src/main/java/cuchaz/enigma/command/Command.java
@@ -13,6 +13,8 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 
+import com.google.common.io.MoreFiles;
+
 public abstract class Command {
         public final String name;
 
@@ -49,6 +51,8 @@ public abstract class Command {
         protected static MappingFormat chooseEnigmaFormat(Path path) {
                 if (Files.isDirectory(path)) {
                         return MappingFormat.ENIGMA_DIRECTORY;
+                } else if ("zip".equalsIgnoreCase(MoreFiles.getFileExtension(path))) {
+                        return MappingFormat.ENIGMA_ZIP;
                 } else {
                         return MappingFormat.ENIGMA_FILE;
                 }
diff --git a/src/main/java/cuchaz/enigma/command/MapSpecializedMethodsCommand.java b/src/main/java/cuchaz/enigma/command/MapSpecializedMethodsCommand.java
index 7696f0f..eb8d5dc 100644
--- a/src/main/java/cuchaz/enigma/command/MapSpecializedMethodsCommand.java
+++ b/src/main/java/cuchaz/enigma/command/MapSpecializedMethodsCommand.java
@@ -36,10 +36,13 @@ public class MapSpecializedMethodsCommand extends Command {
 
     @Override
     public void run(String... args) throws IOException, MappingParseException {
+        run(Paths.get(args[0]), args[1], Paths.get(args[2]), args[3], Paths.get(args[4]));
+    }
+
+    public static void run(Path jar, String sourceFormat, Path sourcePath, String resultFormat, Path output) throws IOException, MappingParseException {
         MappingSaveParameters saveParameters = new MappingSaveParameters(MappingFileNameFormat.BY_DEOBF);
-        EntryTree<EntryMapping> source = MappingCommandsUtil.read(args[1], Paths.get(args[2]), saveParameters);
+        EntryTree<EntryMapping> source = MappingCommandsUtil.read(sourceFormat, sourcePath, saveParameters);
         EntryTree<EntryMapping> result = new HashEntryTree<>();
-        Path jar = Paths.get(args[0]);
         ClassCache classCache = ClassCache.of(jar);
         JarIndex jarIndex = classCache.index(ProgressListener.none());
         BridgeMethodIndex bridgeMethodIndex = jarIndex.getBridgeMethodIndex();
@@ -60,8 +63,7 @@ public class MapSpecializedMethodsCommand extends Command {
             result.insert(specialized, new EntryMapping(name));
         }
 
-        Path output = Paths.get(args[4]);
         Utils.delete(output);
-        MappingCommandsUtil.write(result, args[3], output, saveParameters);
+        MappingCommandsUtil.write(result, resultFormat, output, saveParameters);
     }
 }
diff --git a/src/main/java/cuchaz/enigma/command/MappingCommandsUtil.java b/src/main/java/cuchaz/enigma/command/MappingCommandsUtil.java
index fc68edf..fc7afbc 100644
--- a/src/main/java/cuchaz/enigma/command/MappingCommandsUtil.java
+++ b/src/main/java/cuchaz/enigma/command/MappingCommandsUtil.java
@@ -17,6 +17,7 @@ import cuchaz.enigma.translation.representation.entry.FieldEntry;
 import cuchaz.enigma.translation.representation.entry.MethodEntry;
 
 import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.HashSet;
 import java.util.Set;
@@ -81,7 +82,7 @@ public final class MappingCommandsUtil {
 
     public static EntryTree<EntryMapping> read(String type, Path path, MappingSaveParameters saveParameters) throws MappingParseException, IOException {
         if (type.equals("enigma")) {
-            return EnigmaMappingsReader.DIRECTORY.read(path, ProgressListener.none(), saveParameters);
+            return (Files.isDirectory(path) ? EnigmaMappingsReader.DIRECTORY : EnigmaMappingsReader.ZIP).read(path, ProgressListener.none(), saveParameters);
         }
 
         if (type.equals("tiny")) {