Resolve toBuffer Promise with an array (was: When using promises, how do you get image info)

if a callback is used with toBuffer for example the image info is passed to the callback, how do you get this info when using a promise ?

[lovell]

@Vispercept The data and info attributes “returned” by toBuffer are highly related to each other; info contains properties computed whilst processing the final output image. Perhaps you’re thinking of the existing metadata call to access input image info?

Rather than the Promise resolving with an Array, how about resolving with an Object, which would allow for destructuring e.g.:

sharp(input)
  .resize(123)
  .toBuffer({ resolveWithObject: true })
  .then( ({ data, info }) => {
    ...
  });

[lovell]

Commit 6fe5b30 adds the new resolveWithObject option to toBuffer. This will be in v0.17.3.