node.js 如何将环境变量设置为 gulp 任务？
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How can I set an environment variable as gulp task?
提问by chacham15
I don't want type the extra arguments NODE_ENV='production' gulpevery time I run gulp to set an environment variable.
我不想NODE_ENV='production' gulp每次运行 gulp 来设置环境变量时都输入额外的参数。
I would rather set the environment variable from within gulp via a task.
我宁愿通过 task 从 gulp 中设置环境变量。
What would be a good way to achieve this?
实现这一目标的好方法是什么？
回答by Elise Chant
gulp.task('set-dev-node-env', function() {
return process.env.NODE_ENV = 'development';
});
gulp.task('set-prod-node-env', function() {
return process.env.NODE_ENV = 'production';
});
Use it like:
像这样使用它：
gulp.task('build_for_prod', ['set-prod-node-env'], function() {
// maybe here manipulate config object
config.paths.src.scripts = config.paths.deploy.scripts;
runSequence(
'build',
's3'
);
});
回答by rzr
You can also define it as a script in your package.json
您也可以将其定义为您的脚本 package.json
{
"name": "myapp",
"scripts": {
"gulp": "NODE_ENV='development' gulp",
"gulp-build": "NODE_ENV='production' gulp"
},
...
}
And run it with npm run gulp-build. This has a few benefits
并用npm run gulp-build. 这有几个好处
- You can define arguments easily instead of typing them every time
- Global gulp installation isn't required (same for other tools, like webpack)
- You can define multiple variants with different environment variables and(or) arguments without changing the gulpfile (as you can see above - gulp and gulp-build for development and production respectively)
- 您可以轻松定义参数，而不必每次都键入它们
- 不需要全局 gulp 安装（其他工具也一样，比如 webpack）
- 您可以使用不同的环境变量和（或）参数定义多个变体，而无需更改 gulpfile（如上所示 - gulp 和 gulp-build 分别用于开发和生产）
回答by talkol
Try gulp-env
尝试gulp-env
Quick example on how to set some environment variables before running the nodemon task:
关于如何在运行 nodemon 任务之前设置一些环境变量的快速示例：
// gulpfile.js
var gulp = require('gulp');
var nodemon = require('nodemon');
var env = require('gulp-env');
gulp.task('nodemon', function() {
// nodemon server (just an example task)
});
gulp.task('set-env', function () {
env({
vars: {
MONGO_URI: "mongodb://localhost:27017/testdb-for-british-eyes-only",
PORT: 9001
}
})
});
gulp.task('default', ['set-env', 'nodemon'])
回答by gonzalon
You can also set one by default, and read the variables from a jsonfile:
您还可以默认设置一个，并从json文件中读取变量：
gulp.task('set-env', function () {
var envId = gutil.env.env;
if (!envId) {
envId = "dev";
}
genv({
file: "env." + envId + ".json"
});
});
This would be always devenv by default, and you could call it setting another env, like this:
dev默认情况下，这将始终是env，您可以调用它设置另一个 env，如下所示：
gulp --env prod
gulp --env prod
More of gulp-env
更多的gulp-env
回答by Xabby
You can Setup the environment like follows:
您可以像下面这样设置环境：
// Environment Setup
var env = process.env.NODE_ENV || 'development';
Then you can use the environment to process the code as follows:
然后就可以使用环境对代码进行如下处理：
gulp.task('js',function(){
gulp.src(jsPath)
.pipe(browserify({debug: env === 'development'}))
.pipe(gulpif(env === 'production' , uglify()))
.pipe(gulp.dest(jsDest));
});
