sonnet: fix incorrect environment handling

make-nix-release.sh

@@ -19,6 +19,6 @@ else
   POETRY="$PYTHON -m poetry"
 fi
 
-$POETRY config virtualenvs.create false
+$POETRY config virtualenvs.in-project true
 $POETRY install --no-dev
 $POETRY run python sonnet make release ${RUNTIMES[@]}

sonnet

@@ -55,10 +55,7 @@ class MakeReleaseCommand(Command):
         from poetry.repositories.pool import Pool
         from poetry.repositories.repository import Repository
         from poetry.utils._compat import Path
-        from poetry.utils._compat import decode
-        from poetry.utils._compat import encode
-        from poetry.utils._compat import subprocess
-        from poetry.utils.env import GET_BASE_PREFIX
+        from poetry.utils.env import EnvManager
         from poetry.utils.env import VirtualEnv
         from poetry.utils.helpers import temporary_directory
 
@@ -100,17 +97,12 @@ class MakeReleaseCommand(Command):
                         version
                     )
                 )
-                prefix = decode(
-                    subprocess.run(
-                        [python],
-                        stdout=subprocess.PIPE,
-                        stderr=subprocess.STDOUT,
-                        input=encode(GET_BASE_PREFIX),
-                        check=True,
-                        shell=WINDOWS,
-                    ).stdout
-                )
-                env = VirtualEnv(Path(prefix.strip()), base=Path(prefix.strip()))
+
+                with temporary_directory() as tmp_venv_dir:
+                    venv_dir = Path(tmp_venv_dir) / ".venv"
+                    EnvManager.build_venv(venv_dir.as_posix(), executable=python)
+
+                    env = VirtualEnv(venv_dir, venv_dir)
                     solver = Solver(package, pool, Repository(), Repository(), self.io)
                     with solver.use_environment(env):
                         ops = solver.solve()
@@ -118,14 +110,13 @@ class MakeReleaseCommand(Command):
                             if not env.is_valid_for_marker(op.package.marker):
                                 op.skip("Not needed for the current environment")
 
+                    vendor_dir = Path(
                         self.vendorize_for_python(
-                    python,
+                            env,
                             [op.package for op in ops if not op.skipped],
                             poetry_dir,
                             version,
                         )
-                vendor_dir = Path(
-                    os.path.join(poetry_dir, "_vendor", "py{}".format(python))
                     )
                     created_files += [
                         p.relative_to(Path(tmp_dir))
@@ -227,7 +218,7 @@ class MakeReleaseCommand(Command):
             except subprocess.CalledProcessError:
                 raise RuntimeError("Python {} is not available".format(version))
 
-    def vendorize_for_python(self, python, packages, dest, python_version):
+    def vendorize_for_python(self, env, packages, dest, python_version):
         vendor_dir = os.path.join(dest, "_vendor", "py{}".format(python_version))
 
         bar = self.progress_bar(max=len(packages))
@@ -239,19 +230,12 @@ class MakeReleaseCommand(Command):
         )
         bar.start()
         for package in packages:
-            subprocess.check_output(
-                [
-                    python,
-                    "-m",
-                    "pip",
+            env.run_pip(
                 "install",
                 "{}=={}".format(package.name, package.version),
                 "--no-deps",
                 "--target",
                 vendor_dir,
-                ],
-                stderr=subprocess.STDOUT,
-                shell=WINDOWS,
             )
             bar.advance()
 
@@ -259,6 +243,8 @@ class MakeReleaseCommand(Command):
 
         self.line("")
 
+        return vendor_dir
+
 
 class MakeCommand(Command):
     """