How to omit devDependencies when copying node_modules?
<p>I'd like to copy only modules, which are important for application - those located inside <code>dependencies</code> in <code>package.json</code>. I'd like to omit those under <code>devDependencies</code>.</p>

<p><code>package.json</code></p>

<pre><code>{            
    "dependencies": {
        "express": "^4.13.4",
        "log4js": "^0.6.33"            
    },
    "devDependencies": {
        "gulp": "^3.9.1",
        "gulp-rename": "^1.2.2",
        "gulp-typescript": "^2.12.1",
        "typings": "^0.7.9",
        "yargs": "^4.3.2"
    }
}
</code></pre>

<p><code>gulpfile.js</code></p>

<pre><code>gulp.task('copy_packages', function() {
      gulp
         .src('node_modules/**/*.*')
         .pipe(gulp.dest('../release/node_modules'));
});
</code></pre>

<p>Is there any module or a  smart way to distinguish which modules belongs to <code>dependencies</code> group and which to <code>devDependencies</code>?</p>