gulp task for `nw-gyp` to all dependencies recursively

gulpfile.js

// usage
// just
// `gulp nw-gyp`
// or type node-webkit version
// `gulp nw-gyp --target 0.9.2`

var gulp = require('gulp');
var exec = require('gulp-exec');
var minimist = require('minimist');

gulp.task('nw-gyp', function(){
  var knownOptions = {
    string: 'target',
    default: { 'target': '0.10.5' }
  };
  var options = minimist(process.argv.slice(2), knownOptions);

  var execOptions = {
    continueOnError: false,
    pipeStdout: false
  };
  var reportOptions = {
    err: true,
    stderr: true,
    stdout: true
  };

  var pkg = require('./package.json');
  var modules = [];
  if(!!pkg.dependencies){
    modules = Object.keys(pkg.dependencies)
      .filter(function(m){
        return m != 'nodewebkit'
      })
      .map(function(m){
        return './node_modules/' + m + '/**/binding.gyp'
      })
  }

  return gulp.src(modules)
    .pipe(exec(
      'cd "<%= file.path %>/../"' +
        ' && nw-gyp configure --target=' + options.target +
        ' && nw-gyp build'
    ), execOptions)
    .pipe(exec.reporter(reportOptions));
});