How can I compile Move Scripts?

Move scripts can be compiled with the already existing Aptos Move compiler in the Aptos CLI. Simply create a script file and compile it in the package with:

aptos move compile

There will then be compiled bytecode files under build/ with the same name as the function in Move.

For example this script in package transfer_half, would compile to build/transfer_half/bytecode_scripts/transfer_half.mv

script {
  use std::signer;
  use aptos_framework::coin;
  use aptos_framework::aptos_account;

  fun transfer_half<Coin>(caller: &signer, receiver_address: address) {
    // Retrieve the balance of the caller
    let caller_address: address = signer::address_of(caller);
    let balance: u64 = coin::balance<Coin>(caller_address);

    // Send half to the receiver
    let half = balance / 2;
    aptos_account::transfer_coins<Coin>(caller, receiver_address, half);
  }
}

Additionally, there is a convenience function for a package with exactly one script with the below command:

aptos move compile-script

Providing output like below returning the exact location of the script and a hash for convenience

Compiling, may take a little while to download git dependencies...
UPDATING GIT DEPENDENCY https://github.com/aptos-labs/aptos-core.git
INCLUDING DEPENDENCY AptosFramework
INCLUDING DEPENDENCY AptosStdlib
INCLUDING DEPENDENCY MoveStdlib
BUILDING transfer_half
{
  "Result": {
    "script_location": "/opt/git/developer-docs/apps/docusaurus/static/move-examples/scripts/transfer_half/script.mv",
    "script_hash": "9b57ffa952da2a35438e2cf7e941ef2120bb6c2e4674d4fcefb51d5e8431a148"
  }
}