[cdhr]

uspio napraviti riješenje :

var gulp = require('gulp');
 
gulp.task('default', function(){
 
    console.log('default gulp task...')
 
});

var sass = require('gulp-sass');
 
gulp.task('sass', function () {
 
   gulp.task('sass:main', function () {
    gulp.src('wp-content/themes/wpmd/sass/style.scss')
    .pipe(sass())
    .pipe(gulp.dest('wp-content/themes/wpmd/'));
});

gulp.task('sass:child1', function (){
    gulp.src('wp-content/themes/wpmd-site1-child/sass/style.scss')
    .pipe(sass())
    .pipe(gulp.dest('wp-content/themes/wpmd-site1-child/'));
})
gulp.task('sass:child2', function (){
    gulp.src('wp-content/themes/wpmd-site2-child/sass/style.scss')
    .pipe(sass())
    .pipe(gulp.dest('wp-content/themes/wpmd-site2-child/'));
})
gulp.task('sass:child3', function (){
    gulp.src('wp-content/themes/wpmd-site3-child/sass/style.scss')
    .pipe(sass())
    .pipe(gulp.dest('wp-content/themes/wpmd-site3-child/'));
})

gulp.task('sass',['sass:main','sass:child1','sass:child2','sass:child3'],function(){
    console.log("this will logged after all sass tasks are done");
})
 
});
 
gulp.task('default', ['sass']);

var postcss = require('gulp-postcss');
var autoprefixer = require('autoprefixer');
var lost = require('lost');


gulp.task('sass:main', function () {
    var processors = [autoprefixer , lost];
    gulp.src('wp-content/themes/wpmd/sass/style.scss')
    .pipe(sass())
    .pipe(postcss(processors))
    .pipe(gulp.dest('wp-content/themes/wpmd/'));
});