Add --client default arg

README.adoc

@@ -62,8 +62,9 @@ are relevant for the hook's check. The default is `{defaultScope}`.
 
 [NOTE]
 --
-All hooks have an optional `project-dir` arugument, which is useful for monorepos that do not have a `build.sbt` in their root.
-All hooks have an optional `no-clean` arugument, which won't automatically run an `sbt clean` before executing the command.
+All hooks have an optional `project-dir` argument, which is useful for monorepos that do not have a `build.sbt` in their root.
+All hooks have an optional `no-clean` argument, which won't automatically run an `sbt clean` before executing the command.
+All hooks have an optional `client` argument, which will persist the SBT session across invocations on newer SBT versions.
 --
 
 [IMPORTANT]

pre_commit_hooks/runner.py

@@ -9,6 +9,7 @@ class Opts:
     project_dir: str | None = None
     clean: bool = True
     varargs: dict = field(default_factory=dict)
+    client: bool = False
 
 
 def default_argparse(
@@ -28,12 +29,19 @@ def default_argparse(
         default=False,
         help="Turn off sbt clean. Default: False",
     )
+    arg_p.add_argument(
+        "--client",
+        action="store_true",
+        default=False,
+        help="Run sbt in --client mode, persisting sessions across commits. Default: False",
+    )
     for fn in additional_args:
         fn(arg_p)
     varags = vars(arg_p.parse_args(argv))
     return Opts(
         project_dir=varags.pop("project_dir", None),
         clean=not varags.pop("no_clean", False),
+        client=varags.pop("client", False),
         varargs=varags,
     )
 
@@ -45,12 +53,13 @@ def run_sbt_command(
     opts: Opts = Opts(),
 ):
     print(f"Running SBT command: {task_def} with options: {opts}")
+    sbt_args = "--client" if opts.client else ""
     if opts.clean:
         task_def = f"; clean ; {task_def}"
     else:
         task_def = f"; {task_def}"
     sbt_process = subprocess.run(
-        [f"sbt '{task_def}'"],
+        [f"sbt {sbt_args} '{task_def}'"],
         stdout=subprocess.PIPE,
         stderr=subprocess.STDOUT,
         shell=True,