fix: pdm export support env variables in credentials

Fixes #1939

Signed-off-by: Frost Ming <[email protected]>

news/1939.bugfix.md

@@ -0,0 +1 @@
+Keep the variables in the URL credentials when exporting.

src/pdm/formats/requirements.py

@@ -9,7 +9,6 @@
 
 from pdm.formats.base import make_array
 from pdm.models.requirements import Requirement, parse_requirement
-from pdm.utils import expand_env_vars_in_auth
 
 if TYPE_CHECKING:
     from argparse import Namespace
@@ -191,7 +190,7 @@ def export(
         lines.append("\n")
     sources = project.pyproject.settings.get("source", [])
     for source in sources:
-        url = expand_env_vars_in_auth(source["url"])
+        url = source["url"]
         prefix = "--index-url" if source["name"] == "pypi" else "--extra-index-url"
         lines.append(f"{prefix} {url}\n")
         if not source.get("verify_ssl", True):

tests/test_formats.py

@@ -135,12 +135,12 @@ def test_import_requirements_with_group(project):
     assert not result.get("dependencies")
 
 
-def test_export_expand_env_vars_in_source(project, monkeypatch):
+def test_keep_env_vars_in_source(project, monkeypatch):
     monkeypatch.setenv("USER", "foo")
     monkeypatch.setenv("PASSWORD", "bar")
     project.pyproject.settings["source"] = [{"url": "https://${USER}:${PASSWORD}@test.pypi.org/simple", "name": "pypi"}]
     result = requirements.export(project, [], Namespace())
-    assert result.strip().splitlines()[-1] == "--index-url https://foo:bar@test.pypi.org/simple"
+    assert result.strip().splitlines()[-1] == "--index-url https://${USER}:${PASSWORD}@test.pypi.org/simple"
 
 
 def test_export_replace_project_root(project):