var gulp=require('gulp');
var rev=require('gulp-rev');
var override=require('gulp-rev-css-url');

gulp.task('rev',function(){
    return gulp.src('./app/**/*')
                .pipe(rev())
                .pipe(override())
                .pipe(gulp.dest('./build/'))
                .pipe(rev.manifest())
                .pipe(gulp.dest('./build/'));
});