Would it be possible to make sharp().metadata() contain image size

[Vispercept]

It would be great if one doesn't have to call toBuffer() to gather information about an image size.

Instead of doing something like that:

sharp()
.toBuffer((err, buf, info) => {
  console.log(info.size)
});

it would be great to receive the size as an property when calling sharp().metadata(). The advantage would be that one doesn't have to work on buffers and can instead get the size by using just the stream.

[lovell]

Hello, this should be fairly straightforward to add, thank you for the suggestion.

Ideally we would extract and make common the logic currently in pipeline.cc so it can also work with metadata.cc.

sharp().metadata().then( ({ size }) => console.log(size) );

[KaptaanBarbosa]

I need to create new image with updated metadata and create empty file but how to add updated metadata in new image

[lovell]

v0.21.0 now available with this feature.

[sidequestlegend]

@lovell
I'm using "sharp": "^0.21.0" from npm and this property doesn't seem to exist when i read from the filesystem at least:

 sharp('image_path')
    .metadata()
    .then(metadata=>{
        console.log(metadata.size); // undefined
    });

Edit: sorry should raise a new issue.