Function execute 

pub fn execute(
    crate_metadata: &CrateMetadata,
    final_contract_wasm: &Path,
    metadata_artifacts: &MetadataArtifacts,
    features: &Features,
    network: Network,
    verbosity: Verbosity,
    unstable_options: &UnstableFlags,
    build_info: BuildInfo,
) -> Result<()>

Generates a file with metadata describing the ABI of the smart contract.

It does so by generating and invoking a temporary workspace member.