Support for SOURCE_DATE_EPOCH (reproducible builds)

https://reproducible-builds.org/docs/source-date-epoch/

delocate/tools.py

@@ -5,6 +5,7 @@
 import re
 import stat
 import subprocess
+import time
 import warnings
 import zipfile
 from datetime import datetime
@@ -844,12 +845,27 @@ def zip2dir(
             os.utime(extracted_path, (modified_time, modified_time))
 
 
+ZIP_TIMESTAMP_MIN = 315532800  # 1980-01-01 00:00:00 UTC
+DateTuple = Tuple[int, int, int, int, int, int]
+
+
+def get_zip_datetime(
+    date_time: Optional[DateTuple] = None,
+) -> Optional[DateTuple]:
+    source_date_epoch = os.environ.get("SOURCE_DATE_EPOCH")
+    if source_date_epoch is not None:
+        timestamp = max(int(source_date_epoch), ZIP_TIMESTAMP_MIN)
+        date_time = time.gmtime(timestamp)[0:6]
+    return date_time
+
+
 def dir2zip(
     in_dir: str | PathLike[str],
     zip_fname: str | PathLike[str],
     *,
     compression: int = zipfile.ZIP_DEFLATED,
     compress_level: int = -1,
+    date_time: Optional[DateTuple] = None,
 ) -> None:
     """Make a zip file `zip_fname` with contents of directory `in_dir`
 
@@ -868,6 +884,7 @@ def dir2zip(
     compress_level : int, optional, keyword-only
         The compression level used for this archive.
     """
+    date_time = get_zip_datetime(date_time)
     with zipfile.ZipFile(
         zip_fname, "w", compression=compression, compresslevel=compress_level
     ) as zip:
@@ -881,6 +898,8 @@ def dir2zip(
                 file_path = Path(root, file)
                 out_file_path = file_path.relative_to(in_dir)
                 zip_info = zipfile.ZipInfo.from_file(file_path, out_file_path)
+                if date_time is not None:
+                    zip_info.date_time = date_time
                 zip.writestr(
                     zip_info,
                     file_path.read_bytes(),