Don't constrain build-system.requires with our dependency-versions

cibuildwheel/platforms/ios.py

@@ -33,7 +33,6 @@
 )
 from ..util.helpers import prepare_command, unwrap_preserving_paragraphs
 from ..util.packaging import (
-    combine_constraints,
     find_compatible_wheel,
     get_pip_version,
 )
@@ -491,8 +490,6 @@ def build(options: Options, tmp_path: Path) -> None:
 
                 build_env = env.copy()
                 build_env["VIRTUALENV_PIP"] = pip_version
-                if constraints_path:
-                    combine_constraints(build_env, constraints_path, None)
 
                 match build_frontend.name:
                     case "pip":

cibuildwheel/platforms/macos.py

@@ -32,7 +32,7 @@
     move_file,
 )
 from ..util.helpers import prepare_command, unwrap
-from ..util.packaging import combine_constraints, find_compatible_wheel, get_pip_version
+from ..util.packaging import find_compatible_wheel, get_pip_version
 from ..venv import constraint_flags, find_uv, virtualenv
 
 
@@ -463,10 +463,6 @@ def build(options: Options, tmp_path: Path) -> None:
                 build_env = env.copy()
                 if pip_version is not None:
                     build_env["VIRTUALENV_PIP"] = pip_version
-                if constraints_path:
-                    combine_constraints(
-                        build_env, constraints_path, identifier_tmp_dir if use_uv else None
-                    )
 
                 match build_frontend.name:
                     case "pip":

cibuildwheel/platforms/pyodide.py

@@ -32,7 +32,7 @@
     move_file,
 )
 from ..util.helpers import prepare_command, unwrap, unwrap_preserving_paragraphs
-from ..util.packaging import combine_constraints, find_compatible_wheel, get_pip_version
+from ..util.packaging import find_compatible_wheel, get_pip_version
 from ..util.python_build_standalone import (
     PythonBuildStandaloneError,
     create_python_build_standalone_environment,
@@ -420,8 +420,6 @@ def build(options: Options, tmp_path: Path) -> None:
                 )
 
                 build_env = env.copy()
-                if constraints_path:
-                    combine_constraints(build_env, constraints_path, identifier_tmp_dir)
                 build_env["VIRTUALENV_PIP"] = pip_version
                 call(
                     "pyodide",

cibuildwheel/platforms/windows.py

@@ -23,7 +23,7 @@
 from ..util.cmd import call, shell
 from ..util.file import CIBW_CACHE_PATH, copy_test_sources, download, extract_zip, move_file
 from ..util.helpers import prepare_command, unwrap
-from ..util.packaging import combine_constraints, find_compatible_wheel, get_pip_version
+from ..util.packaging import find_compatible_wheel, get_pip_version
 from ..venv import constraint_flags, find_uv, virtualenv
 
 
@@ -465,9 +465,6 @@ def build(options: Options, tmp_path: Path) -> None:
                 if pip_version is not None:
                     build_env["VIRTUALENV_PIP"] = pip_version
 
-                if constraints_path:
-                    combine_constraints(build_env, constraints_path, identifier_tmp_dir)
-
                 match build_frontend.name:
                     case "pip":
                         # Path.resolve() is needed. Without it pip wheel may try to fetch package from pypi.org

cibuildwheel/util/packaging.py

@@ -1,5 +1,5 @@
 import shlex
-from collections.abc import Mapping, MutableMapping, Sequence
+from collections.abc import Mapping, Sequence
 from dataclasses import dataclass, field
 from pathlib import Path, PurePath
 from typing import Any, Literal, Self, TypeVar
@@ -178,30 +178,3 @@ def find_compatible_wheel(wheels: Sequence[T], identifier: str) -> T | None:
             return wheel
 
     return None
-
-
-def combine_constraints(
-    env: MutableMapping[str, str], /, constraints_path: Path, tmp_dir: Path | None
-) -> None:
-    """
-    This will workaround a bug in pip<=21.1.1 or uv<=0.2.0 if a tmp_dir is given.
-    If set to None, this will use the modern URI method.
-    """
-
-    if tmp_dir:
-        if " " in str(constraints_path):
-            assert " " not in str(tmp_dir)
-            tmp_file = tmp_dir / "constraints.txt"
-            tmp_file.write_bytes(constraints_path.read_bytes())
-            constraints_path = tmp_file
-        our_constraints = str(constraints_path)
-    else:
-        our_constraints = (
-            constraints_path.as_uri() if " " in str(constraints_path) else str(constraints_path)
-        )
-
-    user_constraints = env.get("PIP_CONSTRAINT")
-
-    env["UV_CONSTRAINT"] = env["PIP_CONSTRAINT"] = " ".join(
-        c for c in [our_constraints, user_constraints] if c
-    )