我有以下gulpfile.js，我通过命令行gulp消息执行:
var gulp = require('gulp');
gulp.task('message', function() {
console.log("HTTP Server Started");
});
我得到以下错误消息:
[14:14:41] Using gulpfile ~\Documents\node\first\gulpfile.js
[14:14:41] Starting 'message'...
HTTP Server Started
[14:14:41] The following tasks did not complete: message
[14:14:41] Did you forget to signal async completion?
我在Windows 10系统上使用gulp 4。下面是gulp——version的输出:
[14:15:15] CLI version 0.4.0
[14:15:15] Local version 4.0.0-alpha.2
当前回答
我最近一直在努力解决这个问题，并找到了正确的方法来创建一个默认任务，运行sass然后sass:watch是:
gulp.task('default', gulp.series('sass', 'sass:watch'));
其他回答
在gulp版本4及更高版本中，要求所有gulp任务都告诉gulp任务将在何处结束。为此，我们调用一个函数，该函数作为任务函数中的第一个参数传递
var gulp = require('gulp');
gulp.task('first_task', function(callback) {
console.log('My First Task');
callback();
})
你需要做两件事:
在函数之前添加async。 用return开始函数。 Var gulp = require('gulp'); 饮而尽。Task ('message'， async function() { 返回console.log("HTTP服务器已启动"); })；
我最近一直在努力解决这个问题，并找到了正确的方法来创建一个默认任务，运行sass然后sass:watch是:
gulp.task('default', gulp.series('sass', 'sass:watch'));
我解决了这个问题，这很简单，只需添加下面的代码片段。
var gulp = require('gulp');
gulp.task('message', async function() {
console.log("HTTP Server Started");
});
解决方案很简单，但我概述了我所做的更改、我得到的错误、前后的gulpfile以及包版本——因此使它看起来很长。
除了遵循保存.scss文件时输出的错误外，我还通过遵循前面多个答案的方向解决了这个问题。
简而言之:
我改变了gulp-sass的输入方式——见(A) 我把所有函数都改成了ASYNC函数——参见(B)
(A) gulp-sass import的改动:
之前:var sass = require('gulp-sass) After: var sass = require('gulp-sass')(require('sass'));
简单地将函数转换为ASYNC -
我的gulpfile看起来像以前:
'use strict';
// dependencies
var gulp = require('gulp');
var sass = require('gulp-sass');
var minifyCSS = require('gulp-clean-css');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var changed = require('gulp-changed');
var SCSS_SRC = './src/Assets/scss/**/*.scss';
var SCSS_DEST = './src/Assets/css';
function compile_scss() {
return gulp.src(SCSS_SRC)
.pipe(sass().on('error', sass.logError))
.pipe(minifyCSS())
.pipe(rename({ suffix: '.min' }))
.pipe(changed(SCSS_DEST))
.pipe(gulp.dest(SCSS_DEST));
}
function watch_scss() {
gulp.watch(SCSS_SRC, compile_scss);
}
gulp.task('default', watch_scss); //Run tasks
exports.compile_scss = compile_scss;
exports.watch_scss = watch_scss;
我的gulpfile看起来像:
'use strict';
// dependencies
var gulp = require('gulp');
//var sass = require('gulp-sass');
var sass = require('gulp-sass')(require('sass'));
var minifyCSS = require('gulp-clean-css');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var changed = require('gulp-changed');
var SCSS_SRC = './src/Assets/scss/**/*.scss';
var SCSS_DEST = './src/Assets/css';
async function compile_scss() {
return gulp.src(SCSS_SRC)
.pipe(sass().on('error', sass.logError))
.pipe(minifyCSS())
.pipe(rename({ suffix: '.min' }))
.pipe(changed(SCSS_DEST))
.pipe(gulp.dest(SCSS_DEST));
}
async function watch_scss() {
gulp.watch(SCSS_SRC, compile_scss);
}
gulp.task('default', watch_scss); // Run tasks
exports.compile_scss = compile_scss;
exports.watch_scss = watch_scss;
包版本:
"gulp": "^4.0.2",
"gulp-changed": "^4.0.3",
"gulp-rename": "^2.0.0",
"gulp-uglify": "^3.0.2",
"gulp-clean-css": "^4.3.0",
"gulp-sass": "^5.0.0",
"sass": "^1.38.0"
我得到的错误:
Error in plugin "gulp-sass"
Message:
gulp-sass 5 does not have a default Sass compiler; please set one yourself.
Both the `sass` and `node-sass` packages are permitted.
For example, in your gulpfile:
var sass = require('gulp-sass')(require('sass'));
[14:00:37] The following tasks did not complete: default, compile_scss
[14:00:37] Did you forget to signal async completion?
