@nomiclabs/buidler/src/internal/cli/emoji.ts

Buidler is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.

let emojiEnabled = false;

export function enableEmoji() {
  emojiEnabled = true;
}

export function emoji(msgIfEnabled: string, msgIfDisabled: string = "") {
  return emojiEnabled ? msgIfEnabled : msgIfDisabled;
}