GitHub: Nodejs

GitHub: Nodejs
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Written by Debarghya DasJanuary 12, 2022
11 min read
Github
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Debarghya Das

Junior Front-End Developer

In this article, we will discuss what is GitHub Nodejs, how to use it, and how to create a GitHub Nodejs application.

About GitHub

GitHub, Inc. is a provider of Internet hosting for software development and version control using Git. It offers the distributed version control and source code management (SCM) functionality of Git, plus its own features. It provides access control and several collaboration features such as bug tracking, feature requests, task management, continuous integration, and wikis for every project. Headquartered in California, it has been a subsidiary of Microsoft since 2018.

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Introduction to GitHub Nodejs

JavaScript environment in GitHub that has low inertness and great proficiency in creating results that cause developers to depend on it than some other assets because of its quicker yield is called Nodejs. This is open source and makes codes outside the program where it can work in cross-stage mode. Customer-side and server-side codes can be composed with Nodejs by making it more advantageous for engineers as they need not work on some other coding language to finish the application. The cycles are finished with the assistance of a solitary string that deals with all the frontend errands yet it doesn't cover CPU-related works.

About GitHub Nodejs

Mostly used in server-side programming, Nodejs is used in traditional websites for faster code deployment. All browsers have their own version of Nodejs and this is adapted due to its high performance. It is mostly used for applications and browsers that need continuous connection with the server to collect relevant data from the database. It is also used in real-time applications of distributive servers such as newsfeeds, chats, customer support, and so on.

It is not a programming language or framework but an environment to write codes and test the same against various conditions. Eventloop model is followed here with a single thread. Nodejs uses JavaScript, CoffeeScript, C and C++ in the environment. Knowledge of JavaScript is sufficient to work with Nodejs along with some APIs.

How to use GitHub Nodejs

  1. In the terminal run the command git add. Commit the changes into Git using git commit -m “first commit”.
  2. Now the code must be pushed into Git repository by logging into GitHub account and clicking on new repository. Add URL into git and it will connect to the repository.
  3. git remote add origin https://github.com/UserName/RepoName.git
  4. Push the changes to the repository using git push origin master.
  5. Clone the project using git clone https://github.com/UserName/RepoName.git.
  6. Since npm is already installed, run npm start.
  7. .gitignore file should not be modified in any case and all the processes should be documented.

Creating a GitHub app with Nodejs

1. Start the cloud server you are working on and create GitHub app directly from the settings. Give it a proper name and if it asks for a URL, paste the server URL on the page.

2. Data source type must be selected in the data source configuration wizard. Set read and write access and give permission to create the app only in your account. Click on create and GitHub application is created.

3. Save the application ID and private key from this page and store it locally. Go to the main page of the application and click on the install app. Your GitHub account will be shown along with few repositories. Click on the required repositories and press install.

4. Create a file on the source package with the below code.

import { App } from '@octokit/app';
import fetch from 'node-fetch';
import dotenv from 'dotenv';
dotenv.config();
const app = new App({ id: process.env.GITHUB_APP_IDENTIFIER, privateKey: process.env.PRIVATE_KEY });
const jwt = app.getSignedJsonWebToken();
const getInstallationAccessToken = async (owner, repo) => {
const result = await fetch(`https://api.github.com/repos/${owner}/${repo}/installation`,
{
headers: {
authorization: `Bearer ${jwt}`,
accept: 'application/vnd.github.machine-man-preview+json',
},
});
const installationId = (await result.json()).id;
const installationAccessToken = await app.getInstallationAccessToken({
installationId,
});
return installationAccessToken;
};

export default getInstallationAccessToken;

5. Now update data from the repository and we can see the contents in the console. Now we can update the code and make necessary modifications and now GitHub application with Nodejs is installed.

Requirements

At whatever point new code is created, it should be appropriately positioned and organized into parts. There should be layers for these parts, for example, information rationale and business layers so it very well may be effectively separated from others. There should be normal utility bundles in the application. Application and server should be various constructions so designers can work effectively on it. The setup should be progressive and ought to oblige the climate. Inherent mistake items ought to be utilized for blunder dealing with and every one of the API mistakes ought to be reported appropriately. Mistake streams ought to be tried with a known test applications for better agreement. APM items can be utilized for blunder acknowledgment and personal time.

Register application

Along with Nodejs, we should have NPM and MongoDB installed in the system. We can install npm using npm install and run the same using nodemon server.js.

const hello = require('hello');
const klm = require('klm');
const hey = require('hey');
const app = hello();
const bodyParser = require('body-parser');
const moose = require('moose');
const session = require('hello-session');
const MangoStore = require('connect-mango')(session);
const MongoDBURI = process.env.MONGO_URI || 'mongodb://localhost/ManualAuth';
moose.connect(MongoDBURI, {
useUnifiedTopology: true,
useNewUrlParser: true
});
const db = moose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', () => {
});
app.use(session({
secret: 'work hard',
resave: true,
saveUninitialized: false,
store: new MongoStore({
mooseConnection: db
})
}));
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(hello.static(__dirname + '/views'));
const index = require('./routes/index');
app.use('/', index);
app.use((req, res, next) => {
const error = new Error('File Missing);
err.status = 404;
next(err);
});
app.use((err, req, res, next) => {
res.status(err.status || 500);
res.send(err.message);
});
app.listen(process.env.PORT || 2100, () => {
console.log('Hello app listening on port 2100');
});

Command

This explains the argument class in Nodejs.
constructor(name, description) {
this.description = description || '';
this.variadic = false;
this.parseArg = undefined;
this.defaultValue = undefined;
this.defaultValueDescription = undefined;
switch (name[0]) {
case '<': // e.g. <required>
this.required = true;
this._name = name.slice(1, -1);
break;
case '[': // e.g. [optional] this.required = false;
this._name = name.slice(1, -1);
break;
default:
this.required = true;
this._name = name;
break;
}
if (this._name.length > 3 && this._name.slice(-3) === '...') {
this.variadic = true;
this._name = this._name.slice(0, -3);
}
}
@return {string}
name() {
return this._name;
};

Conclusion

However it has adaptable innovation with great proficiency, there are a few downsides, for example, execution issues for weighty jobs and callback issues. This will affect the code written in the climate also. A few apparatuses in the library are not as expected reported and consequently will cause issues if not oversaw as expected.

GitHub
Git
GitHub Nodejs
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Debarghya Das
Junior Front-End Developer
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