Exception object not displayed in echo

[corporateuser]

Expected Behavior

try {....} catch (e) {console.log(e); echo(e)} should print exception information twice, but echo(e) prints nothing.

Actual Behavior

echo(error) where error is exception object prints nothing

Steps to Reproduce the Problem

1. create 123.mjs file:

#!/usr/bin/env zx
$.verbose = false;
try {
    const str = 'aa';
    await $`grep ${str}${str} 123.mjs`
} catch (error) {
    console.log(error);
    echo(error)
}

2. Execute it with zx 123.mjs

Specifications

• Version: 7.1.1
• Platform: MacOS 12.6.1, node 18.12.1

[antongolub]

echoAPI is not suitable for raw object printing and focuses on tpl literals.

export function echo(pieces: TemplateStringsArray, ...args: any[]) {
  let msg
  const lastIdx = pieces.length - 1
  if (
    Array.isArray(pieces) &&
    pieces.every(isString) &&
    lastIdx === args.length
  ) {
    msg =
      args.map((a, i) => pieces[i] + stringify(a)).join('') + pieces[lastIdx]
  } else {
    msg = [pieces, ...args].map(stringify).join(' ')
  }
  console.log(msg)
}

So you can try smth like this instead:

echo`${error}`

[antonmedv]

Should we make echo(x) also work?

[zloirock]

It should work both ways - from https://github.com/google/zx/releases/tag/5.2.0.

[corporateuser]

Changing function to template literal does not change anything, it still prints nothing for Error object.

[corporateuser]

Another acceptable solution could be a change of the documentation. Currently it states:

echo()
A console.log() alternative which can take ProcessOutput.

Which is not completely true.