feat: use sync instead of install by default (#32)

tests/test_integration.py

@@ -109,3 +109,20 @@ def test_use_pdm_shell_scripts(tmpdir):
         commands = lint-shell
         """,
     )
+
+
+def test_pdm_install_not_sync(tmpdir):
+    execute_config(
+        tmpdir,
+        """
+        [tox]
+        envlist = py3
+        passenv = LD_PRELOAD
+        isolated_build = True
+
+        [testenv]
+        groups = lint
+        pdm_sync = False
+        commands = flake8 --version
+        """,
+    )

tox_pdm/plugin3.py

@@ -22,6 +22,9 @@ def tox_addoption(parser: config.Parser) -> Any:
     parser.add_testenv_attribute(
         "groups", "line-list", "Specify the dependency groups to install"
     )
+    parser.add_testenv_attribute(
+        "pdm_sync", "bool", "Disable to use 'pdm install' instead of 'pdm sync'.", True
+    )
     setup_env()
     parser.add_argument("--pdm", default="pdm", help="The executable path of PDM")
 
@@ -40,9 +43,10 @@ def tox_configure(config: config.Config):
 @hookimpl
 def tox_testenv_install_deps(venv: VirtualEnv, action: action.Action) -> Any:
     groups = venv.envconfig.groups or []
+    op = "sync" if venv.envconfig.pdm_sync else "install"
     if not venv.envconfig.skip_install or groups:
         action.setactivity("pdminstall", groups)
-        args = [venv.envconfig.config.option.pdm, "install"]
+        args = [venv.envconfig.config.option.pdm, op]
         if "default" in groups:
             groups.remove("default")
         elif venv.envconfig.skip_install:

tox_pdm/plugin4.py

@@ -34,7 +34,8 @@ def _setup_env(self) -> None:
         super()._setup_env()
         groups = self.conf["groups"]
         pdm = self.options.pdm
-        cmd = [pdm, "install", "--no-self"]
+        op = "sync" if self.conf["pdm_sync"] else "install"
+        cmd = [pdm, op, "--no-self"]
         for group in groups:
             cmd.extend(("--group", group))
         if pdm not in self.conf["allowlist_externals"]:
@@ -58,6 +59,12 @@ def register_config(self) -> None:
             default=[],
             desc="Specify the dependency groups to install",
         )
+        self.conf.add_config(
+            "pdm_sync",
+            of_type=bool,
+            default=True,
+            desc="Disable to use 'pdm install' instead of 'pdm sync'.",
+        )
 
     @staticmethod
     def id() -> str: