client.js

const { Octokit } = require("@octokit/rest");
const { createAppAuth } = require("@octokit/auth-app");
const { readFileSync } = require('fs');
const { retry } = require("@octokit/plugin-retry");
const { throttling } = require("@octokit/plugin-throttling");

const PRIVATE_KEY_PATH = process.env.PRIVATE_KEY_PATH;
const GITHUB_APP_ID = process.env.GITHUB_APP_ID;

const readPrivateKey = () => {
    return readFileSync(PRIVATE_KEY_PATH);
};

const AppOctokit = Octokit.plugin(retry, throttling);
const newClient = (installationID) => {
    return new AppOctokit({
        authStrategy: createAppAuth,
        auth: {
            id: GITHUB_APP_ID,
            privateKey: readPrivateKey(),
            installationId: installationID,
        },
        userAgent: 'fixCache v0.0.1',
        throttle: {
            onRateLimit: (retryAfter, options) => {
                appOctokit.log.warn(
                    `Request quota exhausted for request ${options.method} ${options.url}`,
                );

                if (options.request.retryCount == 0){
                    appOctokit.log.info(`Retrying after ${retryAfter} seconds!`);
                    return true;
                }
            },
            onAbuseLimit: (retryAfter, options) => {
            // does not retry, only logs a warning
                myOctokit.log.warn(
                    `Abuse detected for request ${options.method} ${options.url}`
                );
            },
        },
        retry: {
            // do not retry on 429 (too many requests) response from api
            doNotRetry: ["429"],
        },
    });
}

module.exports = { newClient };