/** * Get the value of a flag from the command line * @param flag name of the flag to get * @param prefix default `--` but can be changed to `-` the part to the left of the flag name * @returns null if flag is not found, otherwise the value of the flag or the flag name if the flag has no value * @example `getFlag('--silent')` returns `null` if `--silent` is not found, `--silent` if `--silent` is found with no value, and `true` if `--silent=true` is found */ export const getFlag = (flag, prefix = '--') => { flag = `${prefix}${flag.replace(prefix, '')}`; const index = process.argv.findIndex(arg => arg === flag || arg.startsWith(`${flag}=`)); return index === -1 ? null : process.argv[index].replace(`${flag}=`, ''); };