Merge pull request #1675 from pypa/pip-constraints-fix

fix: Don't override PIP_CONSTRAINT if set by the user
2024-03-09 13:53:32 +00:00
parent 80095ac7af 6940c77cd3
commit f7de18e291
4 changed files with 61 additions and 3 deletions
@@ -407,7 +407,11 @@ def build(options: Options, tmp_path: Path) -> None:
                                config.version
                            )
                        )
-                        build_env["PIP_CONSTRAINT"] = constraint_path.as_uri()
+                        user_constraints = build_env.get("PIP_CONSTRAINT")
+                        our_constraints = constraint_path.as_uri()
+                        build_env["PIP_CONSTRAINT"] = " ".join(
+                            c for c in [user_constraints, our_constraints] if c
+                        )
                    build_env["VIRTUALENV_PIP"] = get_pip_version(env)
                    call(
                        "python",