Function getError

deps/npm/lib/utils/error-message.js:382–447

(err, { npm, command, pkg })

}

const getError = (err, { npm, command, pkg }) => {
  // if we got a command that just shells out to something else, then it will presumably print its own errors and exit with a proper status code if there's a problem.
  // If we got an error with a code=0, then... something else went wrong along the way, so maybe an npm problem?
  if (command?.constructor?.isShellout && typeof err.code === 'number' && err.code) {
    return {
      exitCode: err.code,
      suppressError: true,
    }
  }

  // XXX: we should stop throwing strings
  if (typeof err === 'string') {
    return {
      exitCode: 1,
      suppressError: true,
      summary: [['', err]],
    }
  }

  // XXX: we should stop throwing other non-errors
  if (!(err instanceof Error)) {
    return {
      exitCode: 1,
      suppressError: true,
      summary: [['weird error', err]],
    }
  }

  if (err.code === 'EUNKNOWNCOMMAND') {
    const suggestions = require('./did-you-mean.js')(pkg, err.command)
    return {
      exitCode: 1,
      suppressError: true,
      standard: [
        `Unknown command: "${err.command}"`,
        suggestions,
        'To see a list of supported npm commands, run:',
        '  npm help',
      ],
    }
  }

  // Anything after this is not suppressed and gets more logged information

  // add a code to the error if it doesnt have one and mutate some properties so they have redacted information
  err.code ??= err.message.match(/^(?:Error: )?(E[A-Z]+)/)?.[1]
  // this mutates the error and redacts stack/message
  const { summary, detail, files, json } = errorMessage(err, npm)

  return {
    err,
    code: err.code,
    exitCode: getExitCodeFromError(err) || 1,
    suppressError: false,
    summary,
    detail,
    files,
    json,