javascript - Changing url path for js, css and image files with 'gulp build' -

since yeoman no longer uses grunt, i'm not sure how gulp changes urls html/css/js files through gulp build. don't know add gulpfile.js this.

basically, how can have urls change this:

background-image:url('/images/example.jpg') <img src="/images/example.jpg"/> 

to this:

background-image:url('/examplefolder/examplefolder2/images/example.jpg') <img src="/examplefolder/examplefolder2/images/example.jpg"/> 

during gulp-build process?

thanks