Do not run commands_pre or commands_post with --print-deps-to/--print-extras-to

Fixes https://github.com/fedora-python/tox-current-env/issues/58

src/tox_current_env/hooks.py

@@ -90,6 +90,15 @@ def tox_configure(config):
             config.envconfigs[testenv].usedevelop = False
             _allow_all_externals(config.envconfigs[testenv])
 
+    # When printing dependencies/extras we don't run any commands.
+    # Unfortunately tox_runtest_pre/tox_runtest_post hooks don't use firstresult=True,
+    # so we cannot override running commands_pre/commands_post.
+    # We empty the lists of commands instead.
+    if config.option.print_deps_to or config.option.print_extras_to:
+        for testenv in config.envconfigs:
+            config.envconfigs[testenv].commands_pre = []
+            config.envconfigs[testenv].commands_post = []
+
     if (getattr(config.option.print_deps_to, "name", object()) ==
         getattr(config.option.print_extras_to, "name", object())):
             raise tox.exception.ConfigError(

tests/test_integration.py

@@ -156,6 +156,29 @@ def test_print_deps(toxenv, print_deps_stdout_arg):
     assert result.stdout == expected
 
 
+@pytest.mark.parametrize("toxenv", ["py36", "py37", "py38", "py39"])
+@pytest.mark.parametrize("pre_post", ["pre", "post", "both"])
+def test_print_deps_with_commands_pre_post(projdir, toxenv, pre_post, print_deps_stdout_arg):
+    with modify_config(projdir / 'tox.ini') as config:
+        if pre_post == "both":
+            config["testenv"]["commands_pre"] = "echo unexpected"
+            config["testenv"]["commands_post"] = "echo unexpected"
+        else:
+            config["testenv"][f"commands_{pre_post}"] = "echo unexpected"
+    result = tox("-e", toxenv, print_deps_stdout_arg)
+    expected = textwrap.dedent(
+        f"""
+        six
+        py
+        ___________________________________ summary ____________________________________
+          {toxenv}: commands succeeded
+          congratulations :)
+        """
+    ).lstrip()
+    assert result.stdout == expected
+    assert result.stderr == ""
+
+
 @pytest.mark.parametrize("toxenv", ["py36", "py37", "py38", "py39"])
 def test_print_deps_with_tox_minversion(projdir, toxenv, print_deps_stdout_arg):
     with modify_config(projdir / 'tox.ini') as config:
@@ -231,6 +254,29 @@ def test_print_extras(toxenv, print_extras_stdout_arg):
     assert result.stdout == expected
 
 
+@pytest.mark.parametrize("toxenv", ["py36", "py37", "py38", "py39"])
+@pytest.mark.parametrize("pre_post", ["pre", "post", "both"])
+def test_print_extras_with_commands_pre_post(projdir, toxenv, pre_post, print_extras_stdout_arg):
+    with modify_config(projdir / 'tox.ini') as config:
+        if pre_post == "both":
+            config["testenv"]["commands_pre"] = "echo unexpected"
+            config["testenv"]["commands_post"] = "echo unexpected"
+        else:
+            config["testenv"][f"commands_{pre_post}"] = "echo unexpected"
+    result = tox("-e", toxenv, print_extras_stdout_arg)
+    expected = textwrap.dedent(
+        f"""
+        dev
+        full
+        ___________________________________ summary ____________________________________
+          {toxenv}: commands succeeded
+          congratulations :)
+        """
+    ).lstrip()
+    assert result.stdout == expected
+    assert result.stderr == ""
+
+
 @pytest.mark.parametrize("toxenv", ["py36", "py37", "py38", "py39"])
 def test_print_deps_only_deprecated(toxenv):
     result = tox(