Ошибка при компиляции Gulp (ошибка новой версии)?

Question

[shadowcat]

помогите разобраться с ошибкой галпа

assert.js:269
throw err;
^
AssertionError [ERR_ASSERTION]: Task function must be specified

gulp local version 4.0.0
gulp CLI version 2.0.1
node version 10.5.0

var gulp = require('gulp'),
	sass = require('gulp-sass'),
	browserSync = require('browser-sync'),
	concat = require('gulp-concat'),
	uglify = require('gulp-uglifyjs'),
	cssnano = require('gulp-cssnano'),
	rename = require('gulp-rename'),
	del = require('del'),
	imagemin = require('gulp-imagemin'),
	pngquant = require('imagemin-pngquant'),
	cache = require('gulp-cache'),
	autoprefixer = require('gulp-autoprefixer');

gulp.task('sass', function(){
	return gulp.src('app/sass/*.sass')
	.pipe(sass())
	.pipe(autoprefixer(['last 7 versions', '> 1%', 'ie 8', 'ie 7'], { cascade: true}))
	.pipe(gulp.dest('app/css'))
	.pipe(browserSync.reload({stream: true}))
});


gulp.task('scripts', function(){
	return gulp.src([
		'app/libs/bootstrap-3.3.7-dist/js/bootstrap.min.js'
	])
	.pipe(concat('libs.min.js'))
	.pipe(uglify())
	.pipe(gulp.dest('app/js'));
});

gulp.task('css-libs', ['sass'], function(){
	return gulp.src('app/css/libs.css')
	.pipe(cssnano())
	.pipe(rename({suffix: '.min'}))
	.pipe(gulp.dest('app/css'));
});

gulp.task('browser-sync', ['sass', 'scripts'], function() {
    browserSync.init({
        proxy: "project",
        notify: false
    });
});

gulp.task('clean', function(){
	return del.sync([
		'www/web/css',
		'www/web/img',
		'www/web/js'
	]);
});

gulp.task('clear', function(){
	return cache.clearAll();
});

gulp.task('img', function(){
	return gulp.src('app/img/**/*')
	.pipe(cache(imagemin({
		interlaced: true,
		progressive: true,
		svgoPlugins: [{removeViewBox: false}],
		use: [pngquant()]
	})))
	.pipe(gulp.dest('www/web/img'));
});

gulp.task('watch', ['browser-sync', 'scripts'], function(){
	gulp.watch('app/sass/*.sass', ['sass']);
	gulp.watch('app/*.html', browserSync.reload);
	gulp.watch('www/views/*.php', browserSync.reload);
	gulp.watch('app/js/*.js', browserSync.reload);
});

gulp.task('build',['clean', 'img', 'sass', 'scripts'], function(){
	var buildCss = gulp.src([
		'app/css/main.css',
		'app/css/libs.min.css',
	])
		.pipe(gulp.dest('www/web/css'));

	var buildFonts = gulp.src('app/fonts/**/*')
		.pipe(gulp.dest('www/web/fonts'));

	var buildJs = gulp.src('app/js/**/*')
		.pipe(gulp.dest('www/web/js'));

	var buildHtml = gulp.src('app/*.html')
		.pipe(gulp.dest('www/views/html'));

});

gulp.task('default', ['browser-sync', 'watch']);

Comments

[Юнус Газиев]

Нужен полный лог ошибки

[shadowcat]

Юнус Газиев,

assert.js:269
throw err;
^

AssertionError [ERR_ASSERTION]: Task function must be specified
at Gulp.set [as _setTask] (D:\OpenServer\domains\vitis\node_modules\undertaker\lib\set-task.js:10:3)
at Gulp.task (D:\OpenServer\domains\vitis\node_modules\undertaker\lib\task.js:13:8)
at Object. (D:\OpenServer\domains\vitis\gulpfile.js:32:6)
at Module._compile (internal/modules/cjs/loader.js:702:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:713:10)
at Module.load (internal/modules/cjs/loader.js:612:32)
at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
at Function.Module._load (internal/modules/cjs/loader.js:543:3)
at Module.require (internal/modules/cjs/loader.js:650:17)
at require (internal/modules/cjs/helpers.js:20:18)

[shadowcat]

Вроде бы нашла все таки причину:

gulp.parallel

в тасках

gulp.task('default', gulp.parallel('browser-sync', 'watch'));

Answer 1

[Алексей Климов]

в gulp4 функции должны иметь имена.
Нужно вызывать что-то вроде этого:

function sassFunc() {
    return gulp.src('app/sass/*.sass')
  .pipe(sass())
  .pipe(autoprefixer(['last 7 versions', '> 1%', 'ie 8', 'ie 7'], { cascade: true}))
  .pipe(gulp.dest('app/css'))
  .pipe(browserSync.reload({stream: true}))

}

gulp.task('sass', sassFunc);