Dont try to unzip files that are not zip files.

Fixes some stack traces in the log when we have external generated source files.

PiperOrigin-RevId: 565358938

base/src/com/google/idea/blaze/base/qsync/cache/ArtifactTrackerImpl.java

@@ -511,6 +511,18 @@ private void updateMaps(Set<Label> targets, BuildArtifacts newArtifacts) {
     }
   }
 
+  private static final ImmutableSet<String> JAR_ZIP_EXTENSIONS =
+      ImmutableSet.of("jar", "zip", "srcjar");
+
+  private static boolean hasJarOrZipExtension(Path p) {
+    String name = p.getFileName().toString();
+    int dot = name.indexOf('.');
+    if (dot < 0) {
+      return false;
+    }
+    return JAR_ZIP_EXTENSIONS.contains(name.substring(dot + 1));
+  }
+
   @Override
   public ProjectProto.Project updateProjectProto(ProjectProto.Project projectProto)
       throws BuildException {
@@ -540,6 +552,7 @@ public ProjectProto.Project updateProjectProto(ProjectProto.Project projectProto
             .filter(not(ai -> projectDefinition.isIncluded(ai.label())))
             .map(ArtifactInfo::genSrcs)
             .flatMap(List::stream)
+            .filter(ArtifactTrackerImpl::hasJarOrZipExtension)
             .map(generatedExternalSrcFileCache::getCacheFile)
             .filter(Optional::isPresent)
             .map(Optional::get)