Add script to regenerate checksums

scripts/fix_dois_202512.py

@@ -3,6 +3,11 @@
 On Dec. 11, 2025, we realized that the DOI for these products was wrong (used
 the previous version). This script updates existing nc files to have the correct
 DOI in order to avoid data reprocessing.
+
+NOTE/WARNING: if this is ever re-used in the future, remember to update the
+output file checksums (`.mnf` files) after. This script does NOT update the
+associated checksum file - it just updates the DOI metadata. See the
+`regenerate_checksums.py` script.
 """
 
 from pathlib import Path

scripts/regenerate_checksums.py

@@ -0,0 +1,33 @@
+"""Code to regenerate checksums of CDR output files.
+
+To run, manually update the `DATA_DIR` to the G02202/G10016 complete output
+directory you want updated.
+"""
+
+from multiprocessing import Pool
+from pathlib import Path
+
+from pm_tb_data._types import Hemisphere
+
+from seaice_ecdr.checksum import write_checksum_file
+
+# DATA_DIR = Path("/share/apps/G10016_V4/v04r00/dev/trst2284/CDR/complete/")
+# DATA_DIR = Path("/share/apps/G02202_V6/v06r00_outputs/dev/trst2284/complete")
+# DATA_DIR = Path("/share/apps/G10016_V4/v04r00/production/CDR/complete")
+DATA_DIR = Path("/share/apps/G02202_V6/v06r00_outputs/production/complete/")
+
+
+def regenerate_for_hemisphere(hemisphere: Hemisphere):
+    hemisphere_dir = DATA_DIR / hemisphere
+    nc_fps = sorted(list(hemisphere_dir.rglob("*.nc")))
+
+    # Create associated checksum file.
+    for nc_fp in nc_fps:
+        subdir = nc_fp.parent.relative_to(hemisphere_dir)
+        checksum_dir = hemisphere_dir / "checksums" / subdir
+        write_checksum_file(input_filepath=nc_fp, output_dir=checksum_dir)
+
+
+if __name__ == "__main__":
+    with Pool() as p:
+        p.map(regenerate_for_hemisphere, ["north", "south"])