To start, let’s create a class LoadingBar. So now to simulate loading, we will have to write = from cells 1 to 29. To set the cursor on the first column and 3rd row: readline.cursorTo(process.stdout,0,3) ("A") This is the default file that will be run when we run the node. Let’s create an index.js file: touch index.js. This will create a folder cli-prgbar and also creates package.json in the folder. x: number is the position in the x-plane in the terminal, y: number points to the position in the y-plane of the terminal. Now, we will create our project folder: mkdir cli-prgbar. The first argument is the reference to the WritableStream in our case it would be process.stdout which points to the terminal. It id the cursorTo API: cursorTo(stream, Nodejs.WritableStream, x: number, y: number) In Nodejs, it has a library readline which has APIs that enables us to set the cursor. Our terminal has a cursor, which indicates where the next data is to be written. We can assign the cursor in the terminal matrix and write to any cell with the x,y relative position. The order of the cells is from left-to-right and from top-to-bottom. The terminal or cmd or bash is divided into cells where texts, numbers or symbols are displayed. Let’s talk about the progress bar and how we are going to implement it. With this, you can ask questions to users to fill in the information, same way like the command: npm init for example.We are done setting up our project.
NODEJS COMMANDER INSTALL
Other people could install my project globally by running npm i pizza-cli -g, and then use the pizza command to get the CLI up and running!Ī cool feature to add by yourself would be by using: Inquirer. If I would run npm publish, it will be published to the npm registry (but I didn’t, but you could). You can choose to publish your CLI to npm, I’ve chosen to call the name of the project ‘pizza-cli’ in package.json. _/ |_| /_| /_| \_,_| \_| |_| |_| |_| you ordered a pizza with: - marble cheese Usage: pizza An example CLI for ordering pizza's Options: -V, -version output the version number -p, -peppers Add peppers -P, -pineapple Add pineapple -b, -bbq Add bbq sauce -c, -cheese Add the specified type of cheese -C, -no-cheese You do not want any cheese -h, -help output usage information Publish to NPM?
NODEJS COMMANDER CODE
"main": "./lib/index.js", "bin": Īfter we got all our code in the index.ts we can run npm run create to test our CLI in the command line. The word pizza is the command which you use to eventually call you CLI. This will be our compiled index.js file in the lib folder. The NodeJS Use Cases are not limited to web. This model uses call-backs to signal the completion of the task. It also allows the creation of scalable servers through its event-driven program model. Node.js applications also accept command-line arguments like any other programming language. Node.js applications are written in JavaScript. We use it to develop applications that use JavaScript both on the server and client sides. The modules of Node.js use an API that reduces the complexity of web applications. Node.js is an event-based, open-source, and asynchronous I/O framework that uses Google’s V8 JavaScript engine. In our package.json we need to set the entry point of our app (main and bin). It is built on the Google V8 JavaScript engine and is open-source. Run the below command and initiate the NodeJs project. If you do have not installed NPM or NodeJs please refer to this article. typescript - A language for application-scale JavaScript developmentįollowed by installing our devDependencies: npm i nodemon ts-node typescript -save-dev Step by step implementation: Step 1: In the first step, we set up a NodeJs project environment.ts-node - TypeScript execution environment and REPL for node.js.nodemon - Simple monitor script during the development of a node.js app.types/node - TypeScript definitions for Node.js.We need to install all our dependencies: npm i clear figlet commander path -save devDependencies commander - Make node.js command-line interfaces easy.chalk - Terminal string styling is done right.
If our application expects a lot of output from our commands, we should. If we use the spawn () module, its output will be available via event listeners. If we use the exec () function, our command will run and its output will be available to us in a callback.
0 kommentar(er)
