我知道这已经被问过很多次了,但是没有一个答案可以帮助我解决将 gulp 3 迁移到 4 的问题。我们不一定要升级到 gulp 的第 4 版,而是将 Node.js 从 10 更新到 12迫使我们这样做,因为 Node.js 12 不再支持 gulp 3。这里只是我们构建过程中的两个文件,我认为仅从这些文件中了解问题所在就足够了,但如果需要,我可以添加其他文件。为了简洁起见,我还删除了大多数函数的内容。
// gulpfile.js
'use strict';
var gulp = require('gulp');
var wrench = require('wrench');
/**
* This will load all js or coffee files in the gulp directory
* in order to load all gulp tasks
*/
wrench.readdirSyncRecursive('./gulp').filter(function (file) {
return (/\.(js|coffee)$/i).test(file);
}).map(function (file) {
require('./gulp/' + file);
});
/**
* Default task clean temporaries directories and launch the
* main optimization build task
*/
//gulp.task('default', ['clean'], function () { <-- Original line, worked in gulp 3.9
function main(done)
{
gulp.start(build);
done();
}
exports.default = gulp.series(clean, main);
还有一个文件:
// build-dev.js
'use strict';
var path = require('path');
var gulp = require('gulp');
var conf = require('./conf');
var $ = require('gulp-load-plugins')({
pattern: ['gulp-*', 'main-bower-files', 'uglify-save-license', 'del']
});
//gulp.task('html-dev', ['inject'], function () <-- Original line, worked in gulp 3.9
function htmlDev()
{
// Removed for brevity...
}
exports.htmlDev = gulp.series(exports.inject, htmlDev); <-- this is the line that fails
//gulp.task('fonts-dev', function () <-- Original line, worked in gulp 3.9
function fontsDev()
{
// Removed for brevity...
}
exports.fontsDev = fontsDev;
//gulp.task('other-dev', function () <-- Original line, worked in gulp 3.9
function otherDev()
{
// Removed for brevity...
}
exports.otherDev = otherDev;
//gulp.task('clean', function () <-- Original line, worked in gulp 3.9
function clean()
{
// Removed for brevity...
}
exports.clean = clean;
//gulp.task('build:dev', ['html-dev', 'fonts-dev', 'other-dev']); <-- Original line, worked in gulp 3.9
exports.buildDev = gulp.series(exports.htmlDev, fontsDev, otherDev);
当我运行 gulp 时,出现以下错误:
AssertionError [ERR_ASSERTION]: Task never defined: undefined
at getFunction (F:\Dev\DigitalRural\Main\Mchp.DigitalRural.Portal\node_modules\undertaker\lib\helpers\normalizeArgs.js:15:5)
at map (F:\Dev\DigitalRural\Main\Mchp.DigitalRural.Portal\node_modules\arr-map\index.js:20:14)
at normalizeArgs (F:\Dev\DigitalRural\Main\Mchp.DigitalRural.Portal\node_modules\undertaker\lib\helpers\normalizeArgs.js:22:10)
at Gulp.series (F:\Dev\DigitalRural\Main\Mchp.DigitalRural.Portal\node_modules\undertaker\lib\series.js:13:14)
at Object.<anonymous> (F:\Dev\DigitalRural\Main\Mchp.DigitalRural.Portal\gulp\build-dev.js:61:24)
at Module._compile (internal/modules/cjs/loader.js:936:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:947:10)
at Module.load (internal/modules/cjs/loader.js:790:32)
at Function.Module._load (internal/modules/cjs/loader.js:703:12)
at Module.require (internal/modules/cjs/loader.js:830:19) {
generatedMessage: false,
code: 'ERR_ASSERTION',
actual: undefined,
expected: true,
operator: '=='
}
错误在第二个文件build-dev.js中,我在我提供的代码中指出了它。我一直在尝试遵循教程和 SO 问题,但无济于事。是什么赋予了?