feat: add requires_file for py_wheel

python/packaging.bzl

@@ -179,6 +179,11 @@ def _py_wheel_impl(ctx):
     for r in ctx.attr.requires:
         args.add("--requires", r)
 
+    if ctx.attr.requires_file:
+        requires_file = ctx.file.requires_file
+        args.add("--requires_file", requires_file)
+        other_inputs.append(requires_file)
+
     for option, requirements in ctx.attr.extra_requires.items():
         for r in requirements:
             args.add("--extra_requires", r + ";" + option)
@@ -314,6 +319,10 @@ _requirement_attrs = {
     "requires": attr.string_list(
         doc = "List of requirements for this package",
     ),
+    "requires_file": attr.label(
+        doc = "requirements file for List of requirements for this package",
+        allow_single_file = True,
+    ),
 }
 
 _entrypoint_attrs = {

tools/wheelmaker.py

@@ -348,6 +348,11 @@ def parse_args() -> argparse.Namespace:
         action="append",
         help="List of package requirements. Can be supplied multiple times.",
     )
+    requirements_group.add_argument(
+        "--requires_file",
+        type=Path,
+        help="List of package requirements file.",
+    )
     requirements_group.add_argument(
         "--extra_requires",
         type=str,
@@ -434,6 +439,10 @@ def main() -> None:
         classifiers = arguments.classifier or []
         python_requires = arguments.python_requires or ""
         requires = arguments.requires or []
+        if len(requires) == 0 and arguments.requires_file:
+            with open(arguments.requires_file) as fp:
+                requires = fp.read().strip().split("\n")
+
         extra_headers = arguments.header or []
 
         maker.add_metadata(