`wasmtime` CLI has `--consume-fuel` option but no way to configure amount of fuel available

[fitzgen]

Seems like an oversight on our part.

I'm imagining that we would

1. Make the default amount of fuel 0 in the CLI
2. Add a --add-fuel <N> option to add N fuel to the store

I think (1) miiiiight be slightly controversial? As an alternative, we would have a --set-fuel <N> option, instead of --add-fuel <N>, and then we would have to ensure that the store gets exactly N fuel rather than adding N additional fuel to it. This is a little bit of a divergence from the Config methods, so I prefer the former, but I'm open either way.

---

In any case, this should be a pretty easy thing to implement for anyone looking to dive into the Wasmtime code base for the first time. The changes would need to be made around here:

wasmtime/src/lib.rs

Lines 237 to 239 in 4f01711

	/// Executing wasm code will consume fuel, limiting its execution.
	#[structopt(long)]
	consume_fuel: bool,

wasmtime/src/lib.rs

Line 331 in 4f01711

config.consume_fuel(self.consume_fuel);

See https://docs.wasmtime.dev/contributing.html for contributing details.

[ilikepi63]

#3792

[sdeleuze]

Hi, should this issue be closed since #3792 has been merged via 85cf4b0?

[fitzgen]

Yes, thanks.