image-diff/bin/image-diff

#!/usr/bin/env node
// Load in our dependencies
var program = require('commander');
var pkg = require('../package.json');
var imageDiff = require('../');

// Configure our CLI
program.name = pkg.name;
program
  .version(pkg.version)
  .usage('[options] <actual-image> <expected-image> [diff-image]')
  .option('--shadow', 'Draw a shadow of unchanges parts on diff image')
  .action(function handleRun (actualImage, expectedImage, diffImage, program) {
    // If there is no program, then assume diffImage was left out
    if (program === undefined) {
      program = diffImage;
      diffImage = undefined;
    }

    // Run our diff
    imageDiff({
      actualImage: actualImage,
      diffImage: diffImage,
      expectedImage: expectedImage,
      shadow: program.shadow
    }, function handleImageDiff (err, imagesAreSame) {
      // If there was an error, throw it
      if (err) {
        throw err;
      }

      // Otherwise, exit based on the result
      var exitCode = imagesAreSame ? 0 : 1;
      process.exit(exitCode);
    });
  });

// Parse our CLI arguments
program.parse(process.argv);