.retry <count> <command>
Use the .retry command to allow a command to be retried on failure.
The .retry command takes a single count argument that specifies the
number of times to retry the command. The command to run is taken
as the remainder of the arguments and thus the .retry command must
be the final dot command for a step. For example, consider this command:
.retry 3 myscript.sh arg1 arg2 arg3
It
runs
"myscript.sh arg1 arg2 arg3" up to three times before failing
the step. The first invocation of the command that returns a successful
status stops the retry process.