如何将 nodejs Gulp-Task 与 gulp-babel 转译并忽略"import"？

Question

目标是将 ES6 脚本转换为 ES5 并使它们在浏览器上可读。 这最适用于我的节点.js gulp 任务，但有些脚本使用"导入"，例如

import EstaticoModule from '../../assets/js/helpers/module';

我想跳过这个"导入"，更多从结果中删除这一行。

"gulp-babel"中是否有一个参数来实现这一目标，或者有另一个想法可以更好地实现这一目标？

这是我的吞咽任务：

'use strict';
/**
* @function `gulp js:lint1`
* @desc Lint JavaScript files (using `ESLint`).
*/
var gulp = require('gulp'),
helpers = require('require-dir')('../../helpers'),
webpack = require('webpack'),
babel = require("gulp-babel");
//babel = require("babelify");
//babel = require("babel-core");
//require("babel-core");
var taskName = 'js:lint1',
taskConfig = {
src: [
'source/assets/js/**/*.js',
'source/modules/**/*.js',
'source/pages/**/*.js',
'source/demo/modules/**/*.js',
'source/demo/pages/**/*.js',
'!source/modules/**/*.data.js',
'!source/pages/**/*.data.js',
'!source/demo/modules/**/*.data.js',
'!source/demo/pages/**/*.data.js',
'!source/modules/.scaffold/scaffold.js',
'!source/assets/js/libs/**/*.js',
'!source/assets/js/libs/wtscript.js'
],
watch: [
'./source/assets/js/**/*.js',
'./source/modules/**/*.js',
'./source/pages/**/*.js',
'./source/demo/modules/**/*.js',
'./source/demo/pages/**/*.js',
'!./source/modules/.scaffold/scaffold.js'
],
dest: './RSE/',
srcBase: './source/assets/js/'
}
gulp.task( taskName, function() {
var helpers = require('require-dir')('../../helpers'),
tap = require('gulp-tap'),
path = require('path'),
cached = require('gulp-cached'),
eslint = require('gulp-eslint');
return gulp.src(taskConfig.src, {
dot: true
})
.pipe(cached('linting'))
.pipe(eslint())
.pipe(eslint.formatEach())
.pipe(tap(function(file) {
if (file.eslint && file.eslint.errorCount > 0) {
helpers.errors({
task: taskName,
message: 'Linting error in file "' + path.relative('./source/', file.path) + '" (details above)'
});
}else{
console.log(file);
}
}))
.pipe(babel({
presets: [
'es2015',
'react'
],
plugins: [
// Work around some issues in IE
'transform-class-properties',
'transform-proto-to-assign',
['transform-es2015-classes', {
loose: true
}]
]
}))
.pipe(gulp.dest(taskConfig.dest))
;
});
module.exports = {
taskName: taskName,
taskConfig: taskConfig
};

Answer 1

我找到了一种方法：

//  EXCLUDE IMPORTS FROM STREAM
var content = file.contents.toString();
content = content.replace(/import/g, "//$&");
//  RETURN STREAM INTO PIPE
file.contents = Buffer.from(content);

这将导致

//import EstaticoModule from '../../assets/js/helpers/module';

以下是摘要中的代码：

'use strict';
/**
* @function `gulp js:create:js:files`
* @desc Lint JavaScript files (using `ESLint`), EXCLUDE IMPORTS FROM STREAM and create separate js files in modules/%module% folder.
*/
var gulp = require('gulp'),
helpers = require('require-dir')('../../helpers'),
webpack = require('webpack'),
babel = require("gulp-babel");
var taskName = 'js:create:js:files',
taskConfig = {
src: [
'source/assets/js/**/*.js',
'source/modules/**/*.js',
'source/pages/**/*.js',
'source/demo/modules/**/*.js',
'source/demo/pages/**/*.js',
'!source/modules/**/*.data.js',
'!source/pages/**/*.data.js',
'!source/demo/modules/**/*.data.js',
'!source/demo/pages/**/*.data.js',
'!source/modules/.scaffold/scaffold.js',
'!source/assets/js/libs/**/*.js',
'!source/assets/js/libs/wtscript.js'
],
watch: [
'./source/assets/js/**/*.js',
'./source/modules/**/*.js',
'./source/pages/**/*.js',
'./source/demo/modules/**/*.js',
'./source/demo/pages/**/*.js',
'!./source/modules/.scaffold/scaffold.js'
],
dest: './build/',
srcBase: './source/assets/js/'
}
gulp.task( taskName, function() {
var helpers = require('require-dir')('../../helpers'),
tap = require('gulp-tap'),
path = require('path'),
cached = require('gulp-cached'),
eslint = require('gulp-eslint');
return gulp.src(taskConfig.src, {
dot: true
})
.pipe(cached('linting'))
.pipe(eslint())
.pipe(eslint.formatEach())
.pipe(tap(function(file) {
if (file.eslint && file.eslint.errorCount > 0) {
helpers.errors({
task: taskName,
message: 'Linting error in file "' + path.relative('./source/', file.path) + '" (details above)'
});
}else{
//  EXCLUDE IMPORTS FROM STREAM
var content = file.contents.toString();
content = content.replace(/import/g, "//$&");
//  RETURN STREAM INTO PIPE
file.contents = Buffer.from(content);
}
}))
.pipe(babel({
presets: [
'es2015'
,'react'
],
plugins: [
// Work around some issues in IE
'transform-class-properties',
'transform-proto-to-assign',
['transform-es2015-classes', {
loose: true
}]
]
}))
.pipe(gulp.dest(taskConfig.dest))
;
});
module.exports = {
taskName: taskName,
taskConfig: taskConfig
};