Adding custom retry amount to Machine.run()

This PR aims to introduce a variable "retry_amount" passed via Machine's constructor.
This variable will define how many times a command will attempt to run when using a VM.
Default value remain as 30 if not explicitly set.

diff --git a/mkosi/machine.py b/mkosi/machine.py
index e5feeb1d62ed71def50fe7ed687571934b8e0a40..51171d03c3870337d84fe8a326c12ca79b5c89a3 100644 (file)
--- a/mkosi/machine.py
+++ b/mkosi/machine.py
@@ -48,9 +48,10 @@ class LogfileAdapter:
 
 
 class Machine:
-    def __init__(self, args: Sequence[str] = []) -> None:
+    def __init__(self, args: Sequence[str] = [], *, num_retries: int = 30) -> None:
         # Remains None until image is built and booted, then receives pexpect process.
         self._serial: Optional[pexpect.spawn] = None
+        self.num_retries = num_retries
         self.exit_code: int = -1
         self.stack = contextlib.ExitStack()
         self.config: MkosiConfig
@@ -174,7 +175,7 @@ class Machine:
 
         # The retry logic only applies when running commands against a VM.
 
-        for _ in range(0, 30):
+        for _ in range(0, self.num_retries):
             try:
                 return run(cmdline, check=check, stdout=stdout, stderr=stderr, text=True, timeout=timeout)
             except subprocess.CalledProcessError as e:
@@ -209,15 +210,17 @@ def skip_not_supported() -> Iterator[None]:
 
 class MkosiMachineTest(unittest.TestCase):
     args: Sequence[str]
+    num_retries: int
     machine: Machine
 
-    def __init_subclass__(cls, args: Sequence[str] = []) -> None:
+    def __init_subclass__(cls, args: Sequence[str] = [], *, num_retries: int = 30) -> None:
         cls.args = args
+        cls.num_retries = num_retries
 
     @classmethod
     def setUpClass(cls) -> None:
         with skip_not_supported():
-            cls.machine = Machine(cls.args)
+            cls.machine = Machine(cls.args, num_retries = cls.num_retries)
 
         verb = cls.machine.config.verb
         no_nspawn = parse_boolean(os.getenv("MKOSI_TEST_NO_NSPAWN", "0"))