Force index to have a name when written from update_repo.

Author: Eli

dms_datastore/read_multi.py

@@ -9,6 +9,7 @@
 from dms_datastore.filename import build_repo_globs, interpret_fname
 from vtools.functions.merge import ts_merge, ts_splice
 from vtools.functions.unit_conversions import *
+from vtools.data.vtime import compare_interval
 
 __all__ = ["read_ts_repo", "ts_multifile_read", "resolve_providers_for_repo"]
 
@@ -361,7 +362,7 @@ def ts_multifile(
             tsfreq = ts.index.freq if hasattr(ts.index, "freq") else None
             if commonfreq is None:
                 commonfreq = tsfreq
-            elif compare_intervals(tsfreq, commonfreq) < 0:
+            elif compare_interval(tsfreq, commonfreq) < 0:
                 print(
                     f"frequency change detected from {commonfreq} to {tsfreq} within pattern"
                 )

dms_datastore/reconcile_data.py

@@ -407,6 +407,8 @@ def _write_preserving_header(
     os.makedirs(os.path.dirname(dest_path) or ".", exist_ok=True)
     if header_text and not header_text.endswith("\n"):
         header_text = header_text + "\n"
+    if df.index.name is None:
+        df.index.name = "datetime"
     with open(dest_path, "w", encoding="utf-8", newline="\n") as f:
         if header_text:
             f.write(header_text)
@@ -1169,6 +1171,8 @@ def update_repo(
                 head = extract_commented_header(a.staged_path)
 
             df = _read_csv_timeseries(a.staged_path)
+            if df.index.name is None:
+                df.index.name = "datetime"
             _write_preserving_header(df=df, dest_path=a.repo_path, header_text=head)
 
         elif a.action == "splice_write":