Always set passenv/pass_env to *

README.rst

@@ -208,15 +208,13 @@ forcefully killing it before it finished, uninstalling the plugin,
 and running ``tox``), you will get undefined results
 (such as installing packages from PyPI into your current environment).
 
-Environment variables are not passed by default
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Environment variables are passed by default
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Although the plugin name suggests that current environment is used for tests,
-it means the Python environment, not Shell.
-If you want the tests to see environment variables of the calling process,
-use the ``TOX_TESTENV_PASSENV`` environment variable.
-Read `the documentation for passing environment variables to tox
-<https://tox.readthedocs.io/en/latest/config.html#conf-passenv>`_.
+Since 0.0.9, all Shell environment variables are passed by default when using
+this plugin. The `passenv` tox configuration is set to `*`.
+Read `the documentation for more information about passing environment variables to tox
+<https://tox.wiki/en/latest/config.html#passenv>`_.
 
 tox provisioning
 ~~~~~~~~~~~~~~~~

src/tox_current_env/hooks3.py

@@ -85,6 +85,11 @@ def tox_configure(config):
         for testenv in config.envconfigs:
             config.envconfigs[testenv].usedevelop = False
             _allow_all_externals(config.envconfigs[testenv])
+            # Because tox 4 no longer reads $TOX_TESTENV_PASSENV,
+            # this plugin always passes all environment variables by default,
+            # even on tox 3.
+            # Unfortunately at this point the set contains actual values, not globs:
+            config.envconfigs[testenv].passenv |= set(os.environ.keys())
 
     # When printing dependencies/extras we don't run any commands.
     # Unfortunately tox_runtest_pre/tox_runtest_post hooks don't use firstresult=True,

src/tox_current_env/hooks4.py

@@ -87,11 +87,11 @@ def tox_add_core_config(core_conf, state):
 def tox_add_env_config(env_conf, state):
     opt = state.conf.options
     # This allows all external commands.
-    # All of them are extenal for us.
-    # passenv is here because `TOX_TESTENV_PASSENV`
-    # no longer works in tox 4.
+    # All of them are external for us.
+    # Because tox 4 no longer reads $TOX_TESTENV_PASSENV,
+    # this plugin always passes all environment variables by default.
     if opt.current_env:
-        allow_external_cmds = MemoryLoader(allowlist_externals=["*"], passenv=["*"])
+        allow_external_cmds = MemoryLoader(allowlist_externals=["*"], pass_env=["*"])
         env_conf.loaders.insert(0, allow_external_cmds)
     # For print-deps-to and print-extras-to, use empty
     # list of commands so the tox does nothing.

tests/test_integration_tox3.py

@@ -564,3 +564,17 @@ def test_self_is_installed_with_regular_tox(projdir, usedevelop):
         config["testenv"]["usedevelop"] = str(usedevelop)
     result = tox("-e", NATIVE_TOXENV, quiet=False)
     assert "test==0.0.0" in result.stdout or "test @ file://" in result.stdout
+
+
+@pytest.mark.parametrize("passenv", [None, "different list", "__var", "*"])
+def test_passenv(projdir, passenv):
+    with modify_config(projdir / "tox.ini") as config:
+        config["testenv"]["commands"] = """python -c 'import os; print(os.getenv("__var"))'"""
+        if passenv is not None:
+            existing = config["testenv"].get("passenv", "") + " "
+            config["testenv"]["passenv"] = existing + passenv
+    env = {"__var": "assertme"}
+    result = tox("-e", NATIVE_TOXENV, "--current-env", env=env, quiet=False)
+    assert result.returncode == 0
+    assert "\nassertme\n" in result.stdout
+    assert "\nNone\n" not in result.stdout

tests/test_integration_tox4.py

@@ -395,3 +395,30 @@ def test_self_is_installed_with_regular_tox(projdir, usedevelop):
     assert "test-0.0.0" in result.stdout
     if usedevelop:
         assert "test-0.0.0-0.editable" in result.stdout
+
+
+@pytest.mark.parametrize("passenv", [None, "different list", "__var", "*"])
+def test_passenv(projdir, passenv):
+    with modify_config(projdir / "tox.ini") as config:
+        config["testenv"]["commands"] = """python -c 'import os; print(os.getenv("__var"))'"""
+        if passenv is not None:
+            existing = config["testenv"].get("passenv", "") + " "
+            config["testenv"]["passenv"] = existing + passenv
+    env = {"__var": "assertme"}
+    result = tox("-e", NATIVE_TOXENV, "--current-env", env=env, quiet=False)
+    assert result.returncode == 0
+    assert "\nassertme\n" in result.stdout
+    assert "\nNone\n" not in result.stdout
+
+
+@pytest.mark.parametrize("pass_env", [None, "different\nlist", "__var", "*"])
+def test_pass_env(projdir, pass_env):
+    with modify_config(projdir / "tox.ini") as config:
+        config["testenv"]["commands"] = """python -c 'import os; print(os.getenv("__var"))'"""
+        if pass_env is not None:
+            config["testenv"]["pass_env"] = pass_env
+    env = {"__var": "assertme"}
+    result = tox("-e", NATIVE_TOXENV, "--current-env", env=env, quiet=False)
+    assert result.returncode == 0
+    assert "\nassertme\n" in result.stdout
+    assert "\nNone\n" not in result.stdout

tests/utils.py

@@ -39,7 +39,7 @@ def tox(*args, quiet=True, **kwargs):
     q = ("-q",) if quiet else ()
     env = dict(os.environ)
     env.pop("TOX_WORK_DIR", None)
-    kwargs.setdefault("env", env)
+    kwargs["env"] = {**env, **kwargs.get("env", {})}
     try:
         print("current", os.getcwd(), "running in", kwargs["cwd"])
         cp = subprocess.run((sys.executable, "-m", "tox") + q + args, **kwargs)