Get rid of Guava (#555)

* Get rid of Guava

* Fix NPE

* Apply suggestions from review

* Checkstyle

* Add braces to precondition checks

* Forbid space

1 files changed, 1 insertions, 2 deletions

diff --git a/enigma-cli/src/main/java/cuchaz/enigma/command/Command.java b/enigma-cli/src/main/java/cuchaz/enigma/command/Command.java
index de06fa6..06c4916 100644
--- a/enigma-cli/src/main/java/cuchaz/enigma/command/Command.java
+++ b/enigma-cli/src/main/java/cuchaz/enigma/command/Command.java
@@ -6,7 +6,6 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 
-import com.google.common.io.MoreFiles;
 import net.fabricmc.mappingio.MappingReader;
 import net.fabricmc.mappingio.tree.MemoryMappingTree;
 import net.fabricmc.mappingio.tree.VisitableMappingTree;
@@ -57,7 +56,7 @@ public abstract class Command {
 
         protected static EntryTree<EntryMapping> readMappings(Path path, ProgressListener progress, MappingSaveParameters saveParameters) throws IOException, MappingParseException {
                 // Legacy
-                if ("zip".equalsIgnoreCase(MoreFiles.getFileExtension(path))) {
+                if (path.getFileName().toString().toLowerCase().endsWith(".zip")) {
                         return MappingFormat.ENIGMA_ZIP.read(path, progress, saveParameters, null);
                 }