'sh: cross-env: command not found - 不管是什么'

Introduction

As a programmer, you may have encountered an error message saying 'sh: cross-env: command not found - no matter what'. This error message can be frustrating because it doesn't provide much information about what went wrong or how to fix it. In this article, we will explore the causes and solutions to this error message.

Causes

The 'sh: cross-env: command not found - no matter what' error message usually occurs when you try to run a script that requires the 'cross-env' command. 'cross-env' is a tool that allows you to set environment variables across different operating systems. The error message means that the command is not recognized by your operating system.

The most common cause of this error message is that you haven't installed 'cross-env' globally or locally. If you are using a package manager like npm or yarn, you need to add 'cross-env' as a dependency or a devDependency in your package.json file.

Another possible cause is that you are not running the command from the right directory. Make sure that you are in the project directory where 'cross-env' is installed.

Solutions

To fix the 'sh: cross-env: command not found - no matter what' error message, you need to install 'cross-env' either globally or locally. Here are the steps:

Installing cross-env globally

To install 'cross-env' globally, run the following command:

npm install -g cross-env

This command will install 'cross-env' globally on your system, and you will be able to use it in any project.

Installing cross-env locally

To install 'cross-env' locally, add it as a dependency or a devDependency in your package.json file. Run the following command:

npm install --save-dev cross-env

This command will install 'cross-env' locally in your project's node_modules directory. You can use it in your project scripts by calling the 'cross-env' command from the node_modules/.bin/ directory.

Using cross-env in your project

Once 'cross-env' is installed, you can use it in your project scripts to set environment variables. Here is an example:

"scripts": {
  "start": "cross-env NODE_ENV=development nodemon index.js"
}

This script sets the NODE_ENV environment variable to 'development' before running the 'nodemon index.js' command. You can use 'cross-env' to set any environment variable you need.

Conclusion

The 'sh: cross-env: command not found - no matter what' error message is caused by the 'cross-env' command not being recognized by your operating system. To fix this error, you need to install 'cross-env' either globally or locally and make sure that you are using it in the right directory. Once you have 'cross-env' installed, you can use it in your project scripts to set environment variables across different operating systems.