How to use graphicsmagick in node.js to crop circle picture (other use any other way to make this on node.js)

I use another module to solve this problem:

this code is for square image (this.height = this.width)

node-pngjs

var fs = require('fs'),
PNG = require('pngjs').PNG;

fs.createReadStream(__dirname + "/input.png")
    .pipe(new PNG({
        filterType: 4
    }))
    .on('parsed', function() {
    for (var y = 0; y < this.height; y++) {
        for (var x = 0; x < this.width; x++) {
            var idx = (this.width * y + x) << 2;
            var radius = this.height / 2;
            if(y >= Math.sqrt(Math.pow(radius, 2) - Math.pow(x - radius, 2)) + radius || y <= -(Math.sqrt(Math.pow(radius, 2) - Math.pow(x - radius, 2))) + radius) {
                this.data[idx + 3] = 0;
            }
        }
    }
        this.pack().pipe(fs.createWriteStream(__dirname + "/output.png"));
    });

I was able to do it with the following plugin: https://www.npmjs.com/package/circle-image

After you install it:

var images = require('circle-image');
var imageSizes = [125, 100, 30];
//uniqueId param is used to identify a user 
//so user the primary key or something guaranteed to be unique 
images.execute('imagepath', uniqueId, imageSizes).then(function (paths) {
  //array of circularized image paths 
  console.log(paths[0]); //circle_user_{uniqueId}_150.png 
})