a tool to write better scripts


Google recently released a new library called ZX, allowing developers to write CLI scripts using JavaScript without having to directly manage Node.js.

CLI scripts are most often written in Bash. However, writing Bash scripts is not a trivial task, especially for developers who are not comfortable with the Linux command line.

Although scripting using Node.js has long been possible, interacting with executables and handling arguments and responses can be quite difficult and has limited the use of JavaScript for such tasks.

To address these challenges, Google recently released zx, a Node.js executable that solves common pitfalls of writing JavaScript CLI scripts while providing a set of responsive tools and libraries to speed up the development process.

To get started, install zx globally with npm using the following command:

npm i -g zx

Before starting to write zx scripts, two important prerequisites should be noted.

First, we need to tell the operating system which interpreter is needed for our script. To do this, we use a special instruction called box (or hashbang). For zx scripts, we add the following line to the start of the file:

#!/usr/bin/env zx

Second, we need to tell the operating system that the text file we wrote is an executable using

chmod +x ./				

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