[Metadat utils] fix: json lines ordering. (#7744)

fix: json lines ordering.

utils/update_metadata.py

@@ -30,7 +30,7 @@
 
 import pandas as pd
 from datasets import Dataset
-from huggingface_hub import upload_folder
+from huggingface_hub import hf_hub_download, upload_folder
 
 from diffusers.pipelines.auto_pipeline import (
     AUTO_IMAGE2IMAGE_PIPELINES_MAPPING,
@@ -39,6 +39,9 @@
 )
 
 
+PIPELINE_TAG_JSON = "pipeline_tags.json"
+
+
 def get_supported_pipeline_table() -> dict:
     """
     Generates a dictionary containing the supported auto classes for each pipeline type,
@@ -57,8 +60,8 @@ def get_supported_pipeline_table() -> dict:
         (class_name.__name__, "image-to-image", "AutoPipelineForInpainting")
         for _, class_name in AUTO_INPAINT_PIPELINES_MAPPING.items()
     ]
-    all_supported_pipeline_classes.sort(key=lambda x: x[0])
     all_supported_pipeline_classes = list(set(all_supported_pipeline_classes))
+    all_supported_pipeline_classes.sort(key=lambda x: x[0])
 
     data = {}
     data["pipeline_class"] = [sample[0] for sample in all_supported_pipeline_classes]
@@ -79,8 +82,24 @@ def update_metadata(commit_sha: str):
     pipelines_table = pd.DataFrame(pipelines_table)
     pipelines_dataset = Dataset.from_pandas(pipelines_table)
 
+    hub_pipeline_tags_json = hf_hub_download(
+        repo_id="huggingface/diffusers-metadata",
+        filename=PIPELINE_TAG_JSON,
+        repo_type="dataset",
+    )
+    with open(hub_pipeline_tags_json) as f:
+        hub_pipeline_tags_json = f.read()
+
     with tempfile.TemporaryDirectory() as tmp_dir:
-        pipelines_dataset.to_json(os.path.join(tmp_dir, "pipeline_tags.json"))
+        pipelines_dataset.to_json(os.path.join(tmp_dir, PIPELINE_TAG_JSON))
+
+        with open(os.path.join(tmp_dir, PIPELINE_TAG_JSON)) as f:
+            pipeline_tags_json = f.read()
+
+        hub_pipeline_tags_equal = hub_pipeline_tags_json == pipeline_tags_json
+        if hub_pipeline_tags_equal:
+            print("No updates, not pushing the metadata files.")
+            return
 
         if commit_sha is not None:
             commit_message = (