fix(uv-pip-compat): bind venv python for more pip commands and add tests for compatibility wrapper

tests/test_uv_pip_compat.py

@@ -0,0 +1,79 @@
+from __future__ import annotations
+
+import os
+import shutil
+import subprocess
+import tempfile
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+WRAPPER = ROOT / "scripts" / "uv-pip-compat.sh"
+
+
+class UvPipCompatTests(unittest.TestCase):
+    def run_wrapper(self, link_name: str, *args: str) -> list[str]:
+        with tempfile.TemporaryDirectory() as temp_dir:
+            venv_bin = Path(temp_dir) / "venv" / "bin"
+            venv_bin.mkdir(parents=True)
+            (venv_bin / "python").write_text("#!/bin/sh\nexit 0\n", encoding="utf-8")
+            (venv_bin / "python").chmod(0o755)
+
+            argv_file = Path(temp_dir) / "argv.txt"
+            uv_bin = venv_bin / "uv"
+            uv_bin.write_text(
+                "#!/bin/sh\n"
+                # 测试只关心兼容层传给 uv 的参数，逐行记录可以避免 shell 转义差异干扰断言。
+                f"for arg in \"$@\"; do printf '%s\\n' \"$arg\" >> '{argv_file}'; done\n",
+                encoding="utf-8",
+            )
+            uv_bin.chmod(0o755)
+
+            wrapper_path = venv_bin / "uv-pip-compat"
+            shutil.copy2(WRAPPER, wrapper_path)
+            wrapper_path.chmod(0o755)
+
+            link_path = venv_bin / link_name
+            link_path.symlink_to(wrapper_path.name)
+
+            subprocess.run(
+                [str(link_path), *args],
+                check=True,
+                env={
+                    **os.environ,
+                    "PATH": f"{venv_bin}{os.pathsep}{os.environ.get('PATH', '')}",
+                },
+            )
+            return argv_file.read_text(encoding="utf-8").splitlines()
+
+    def test_pip_install_binds_venv_python(self):
+        argv = self.run_wrapper("pip", "install", "-r", "requirements.txt")
+
+        self.assertEqual(
+            [
+                "pip",
+                "install",
+                "--python",
+                argv[3],
+                "-r",
+                "requirements.txt",
+            ],
+            argv,
+        )
+        self.assertTrue(argv[3].endswith("/venv/bin/python"))
+
+    def test_pip_install_keeps_explicit_environment(self):
+        argv = self.run_wrapper("pip", "install", "--system", "demo-package")
+
+        self.assertEqual(["pip", "install", "--system", "demo-package"], argv)
+
+    def test_pip_sync_binds_venv_python(self):
+        argv = self.run_wrapper("pip-sync", "requirements.txt")
+
+        self.assertEqual(["pip", "sync", "--python", argv[3], "requirements.txt"], argv)
+        self.assertTrue(argv[3].endswith("/venv/bin/python"))
+
+
+if __name__ == "__main__":
+    unittest.main()