gulpfile.js

var gulp = require('gulp'),
    shell = require('gulp-shell'),
    gutil = require('gulp-util');

var publishAssets = function (evt) {
    var changedFilePath = evt.path;
    var splitFilePath = changedFilePath.split('/');
    var moduleLocation = splitFilePath.indexOf('Modules') + 1;
    var moduleName = splitFilePath[moduleLocation];

    gutil.log('File ' + changedFilePath + ' changed, publishing ' + moduleName + ' module.');
    gulp.src('').pipe(shell(['php artisan module:publish ' + moduleName + ' --market=pt']));
}

gulp.task('default', ['watch']);

gulp.task('watch', function () {
    gulp.watch(['Modules/*/Assets/**/*'])
        .on('change', function (evt) {
            publishAssets(evt);
        });
});