Fix heurigen-data download

heurigen-data.py

@@ -1,6 +1,7 @@
 import glob
 import os
 import datasets
+from huggingface_hub import snapshot_download
 
 _CITATION = """TO BE ADDED."""
 
@@ -9,6 +10,8 @@ HeuriGen is a collection of combinatorial-optimization problems
 for benchmarking heuristic-program generation by LLMs.
 """
 
+REPO_ID = "heurigen/heurigen-data"
+
 
 class HeuriGenConfig(datasets.BuilderConfig):
     def __init__(self, **kwargs):
@@ -52,12 +55,17 @@ class HeuriGen(datasets.GeneratorBasedBuilder):
                 }
             ),
             supervised_keys=None,
-            homepage="https://huggingface.co/datasets/heurigen/heurigen-data",
+            homepage=f"https://huggingface.co/datasets/{REPO_ID}",
         )
 
     def _split_generators(self, dl_manager):
-        root = dl_manager.manual_dir or os.path.dirname(__file__)
-        base = os.path.join(root, self.config.name)
+        local_root = snapshot_download(
+            repo_id=REPO_ID,
+            repo_type="dataset",
+            revision="main",
+            allow_patterns=[f"{self.config.name}/**"],
+        )
+        base = os.path.join(local_root, self.config.name)
 
         # helper – returns all files in that split, including files in subfolders but not the folders themselves
         def files(pattern):
@@ -67,20 +75,20 @@ class HeuriGen(datasets.GeneratorBasedBuilder):
                     all_files.append(os.path.abspath(path))
             return sorted(all_files)
 
+        demo_paths = files("demo/**/*")
+        eval_paths = files("eval/**/*")
+
         return [
             datasets.SplitGenerator(
                 name=datasets.Split.TRAIN,
-                gen_kwargs={"files": files("demo/**/*") or files("demo.*")},
+                gen_kwargs={"files": demo_paths},
             ),
             datasets.SplitGenerator(
                 name=datasets.Split.TEST,
-                gen_kwargs={"files": files("eval/**/*") or files("eval.*")},
+                gen_kwargs={"files": eval_paths},
             ),
         ]
 
     def _generate_examples(self, files):
         for idx, path in enumerate(files):
-            with open(path, "r") as f:
-                # read the first line, just for avoiding lazy loading
-                first_line = f.readline()
-                yield idx, {"file_path": path}
+            yield idx, {"file_path": path}