How to organize proper SVG sprite names in gulp?

Question

gulp.js

I'm using gulp-svg-sprite .
How to organize this in gulp?
There are folders with files
folder-icons/
-- icon1.svg
-- icon2.svg
-- icon3.svg
folder-social/
-- social1.svg
-- social2.svg
-- social3.svg
At the output I want to get
folder-icons- sprite.svg
folder-social-sprite.svg
For each folder, write a task in gulp, somehow not comme il faut.

Answer 1

"shape": {
  "id": {
    "separator": "-"
  }
}

the output will be sprite.svg where id will be folder-icon_name