fix: hide Git delivery console windows on Windows

tests/test_git_delivery.py

@@ -148,6 +148,27 @@ def test_subprocess_runner_supplies_a_system_path_for_launch_agents(self):
 
         self.assertEqual(run.call_args.kwargs["env"]["PATH"], os.defpath)
 
+    def test_subprocess_runner_hides_windows_console(self):
+        completed = mock.Mock(returncode=0, stdout="", stderr="")
+        windows = meter.platform_services(
+            "windows",
+            environment={"USERPROFILE": r"C:\Users\example"},
+            home=r"C:\Users\example",
+        )
+        with mock.patch(
+            "token_meter.services.git_delivery.platform_services",
+            return_value=windows,
+        ), mock.patch(
+            "token_meter.services.git_delivery.subprocess.run",
+            return_value=completed,
+        ) as run:
+            meter.GitDeliveryService._subprocess_runner(
+                ["git", "--version"], timeout=1,
+            )
+
+        self.assertEqual(run.call_args.kwargs["creationflags"], 0x08000000)
+        self.assertTrue(run.call_args.kwargs["close_fds"])
+
     def test_scan_limits_generator_candidates_without_losing_limit_coverage(self):
         with tempfile.TemporaryDirectory() as tmp:
             service = meter.GitDeliveryService(

token_meter/services/git_delivery.py

@@ -10,6 +10,8 @@
 import subprocess
 import threading
 
+from token_meter.platforms import ProcessPurpose, platform_services
+
 
 LEDGER_SCHEMA_VERSION = 1
 GIT_TIMEOUT_SECONDS = 10
@@ -354,6 +356,21 @@ def __init__(self, ledger_path, runner=None, now=None, salt=""):
             "last_checked": self.ledger.last_checked(),
         }
 
+    @staticmethod
+    def _platform_subprocess_kwargs():
+        """Match app._platform_subprocess_kwargs without importing app.py."""
+        options = platform_services().process_options(ProcessPurpose.DEFAULT)
+        if not options.supported:
+            return {}
+        kwargs = {}
+        if options.close_fds:
+            kwargs["close_fds"] = True
+        if options.start_new_session:
+            kwargs["start_new_session"] = True
+        if options.creation_flags:
+            kwargs["creationflags"] = options.creation_flags
+        return kwargs
+
     @staticmethod
     def _subprocess_runner(argv, timeout):
         environment = {
@@ -373,6 +390,7 @@ def _subprocess_runner(argv, timeout):
             encoding="utf-8",
             errors="replace",
             env=environment,
+            **GitDeliveryService._platform_subprocess_kwargs(),
         )
 
     @staticmethod