Helping fuzzy at #node.js work with imagemagick

trimmer.js

trimmer = require('./trimSouthEast.js');


var files = ['lol lol.png']

files.forEach(trimmer.trimSouthEast);

trimSouthEast.js

var spawn = require('child_process').spawn;
var fs = require('fs');
var os = require('os');

exports.trimSouthEast = function(file, i){
    /*
     * Trims the bottom and right edges
     */
    
    var origFile = process.cwd() + '/' + file;
    var tempFile1 = os.tmpDir() + 'image1_' +i+'.png';
    var tempFile2 = os.tmpDir() + 'image2_' +i+'.png';
    
    var args1 = [origFile, "-gravity", "North", "-background", "white", "-splice", "0x1", "-background", "black", "-splice", "0x1","-trim","+repage","-chop", "0x1", tempFile1];
    var args2 = [tempFile1, "-gravity", "West", "-background", "white", "-splice", "1x0", "-background", "black", "-splice", "1x0","-trim","+repage", "-chop", "1x0", tempFile2];
    
    var firstTrans = spawn("convert", args1);
    
    firstTrans.stdout.on('data', function (data) {
      console.log('stdout: ' + data);
    });
    
    firstTrans.stderr.on('data', function (data) {
      console.error('stderr: ' + data);
    });
    
    firstTrans.on("close", function(code) {
        console.log('first transform process exited with code ' + code);
        if (code == 0) {
            var secondTrans = spawn("convert", args2);
            
            secondTrans.stdout.on('data', function (data) {
              console.log('stdout: ' + data);
            });
            
            secondTrans.stderr.on('data', function (data) {
              console.error('stderr: ' + data);
            });
                
            
            secondTrans.on("close", function(code) {
                console.log('second transform process exited with code ' + code);
                if (code == 0) {
                    fs.rename(tempFile2, origFile, function(err){
                        if (err) {
                            console.error("I couldn't process file", origFile, err)
                        }
                    });
                }
            });
        }
    });
};