Add --no-reset option to the list command (#91)

* Initial plan

* Add --reset/--no-reset option to the list command

Agent-Logs-Url: https://github.com/Josverl/mpflash/sessions/aa67b28c-fcbb-42ff-96d6-db87d158f265

Co-authored-by: Josverl <981654+Josverl@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Josverl <981654+Josverl@users.noreply.github.com>

Author: Copilot

mpflash/cli_list.py

@@ -62,7 +62,15 @@
     show_default=True,
     help="""Show progress""",
 )
-def cli_list_mcus(serial: List[str], ignore: List[str], bluetooth: bool, as_json: bool, progress: bool = True) -> int:
+@click.option(
+    "--reset/--no-reset",
+    "reset",
+    is_flag=True,
+    default=True,
+    show_default=True,
+    help="""Reset the board after listing.""",
+)
+def cli_list_mcus(serial: List[str], ignore: List[str], bluetooth: bool, as_json: bool, progress: bool = True, reset: bool = True) -> int:
     """List the connected MCU boards, and output in a nice table or json."""
     from .connected import list_mcus
     from .list import show_mcus
@@ -82,13 +90,14 @@ def cli_list_mcus(serial: List[str], ignore: List[str], bluetooth: bool, as_json
 
     if progress:
         show_mcus(conn_mcus, refresh=False)
-    for mcu in conn_mcus:
-        # reset the board so it can continue to whatever it was running before
-        if mcu.family == "circuitpython":
-            # CircuitPython boards need a special reset command
-            mcu.run_command(["exec", "--no-follow", "import microcontroller,time;time.sleep(0.01);microcontroller.reset()"], resume=False)
-        elif mcu.family == "unknown":
-            continue
-        else:
-            mcu.run_command("reset")
+    if reset:
+        for mcu in conn_mcus:
+            # reset the board so it can continue to whatever it was running before
+            if mcu.family == "circuitpython":
+                # CircuitPython boards need a special reset command
+                mcu.run_command(["exec", "--no-follow", "import microcontroller,time;time.sleep(0.01);microcontroller.reset()"], resume=False)
+            elif mcu.family == "unknown":
+                continue
+            else:
+                mcu.run_command("reset")
     return 0 if conn_mcus else 1

tests/cli/test_cli_list.py

@@ -22,6 +22,8 @@
         ("2", 0, ["list", "--json"]),
         ("3", 0, ["list", "--no-progress"]),
         ("4", 0, ["list", "--json", "--no-progress"]),
+        ("5", 0, ["list", "--no-reset"]),
+        ("6", 0, ["list", "--reset"]),
     ],
 )
 def test_mpflash_list(id, ex_code, args: List[str], mocker: MockerFixture):