PrepareBaseCmd is meant for tendermint and other servers.

PrepareMainCmd is meant for client side libs that want some more flags This adds --encoding (hex, btc, base64) and --output (text, json) to the command.

RunCaptureWithArgs executes the given command with the specified command line args and environmental variables set.

RunWithArgs executes the given command with the specified command line args and environmental variables set.

WriteConfigVals writes a toml file with the given values.

Executor wraps the cobra Command with a nicer Execute method.

Executable is the minimal interface to *corba.Command, so we can wrap if desired before the test.