Use clap's validator instead.

[fnando]

What

Use a clap validator to parse the alias argument.

$ stellar contract deploy --wasm ./target/wasm32-unknown-unknown/release/hello_world.wasm --network standalone --source alice --alias '!foo' --global
error: alias must be 1-30 chars long, and have only letters, numbers, underscores and dashes

Why

So we can use a built-in feature.

Known limitations

N/A

[willemneal]

Could we have a test to show the error works?

[fnando]

@willemneal can you point me to a test I can borrow?

[willemneal]

cmd/crates/soroban-test/tests/it/config.rs

[willemneal]

We can use the new type solution later. Best to have something now.