Get packages for pipenv check from the target venv.

[yeisonvargasf]

The issue

#4819
#5488

The fix

Now, this command gets the packages to be analyzed from the target venv.

[matteius]

Something not quite right with this change and the Windows CI.

[matteius]

@yeisonvargasf A variation of these changes work for windows -- the primary issue is that the file gets-re-opened so it needs to be closed first.

PS C:\Users\matte\Projects\pipenv> git diff
diff --git a/pipenv/core.py b/pipenv/core.py
index acebcc20..494191cb 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -2959,6 +2959,16 @@ def do_check(
     if safety_project:
         options.append(f"--project={safety_project}")

+    target_venv_packages = run_command(
+        _cmd + ["-m", "pip", "list", "--format=freeze"], is_verbose=project.s.is_verbose()
+    )
+
+    temp_requirements = tempfile.NamedTemporaryFile(mode="w+", prefix=f"{project.virtualenv_name}", suffix="_requirements.txt", delete=False)
+    temp_requirements.write(target_venv_packages.stdout.strip())
+    temp_requirements.close()
+
+    options.extend(["--file", temp_requirements.name])
+
     cmd = _cmd + [safety_path, "check"] + options

     if db:
@@ -3044,6 +3054,8 @@ def do_check(

     cli(prog_name="pipenv")

+    temp_requirements.remove()
+

 def do_graph(project, bare=False, json=False, json_tree=False, reverse=False):
     import json as jsonlib
diff --git a/tests/integration/test_cli.py b/tests/integration/test_cli.py
index f086cdfe..b6009d85 100644
--- a/tests/integration/test_cli.py
+++ b/tests/integration/test_cli.py
@@ -140,7 +140,6 @@ def test_pipenv_graph_reverse(pipenv_instance_private_pypi):

 @pytest.mark.cli
 @pytest.mark.needs_internet(reason='required by check')
-@pytest.mark.skip("Safety 2 ends up scanning the project virtualenv and not the instance created by this test.")
 def test_pipenv_check(pipenv_instance_private_pypi):
     with pipenv_instance_private_pypi() as p:
         c = p.pipenv('install pyyaml')

[yeisonvargasf]

@matteius, thank you! I pushed the fix for that case; let me know if there is something more to fix.