@whook/whook/dist/services/repl.js

Build strong and efficient REST web services.

import { autoProvider, name, location, } from 'knifecycle';
import { identity, noop } from '../libs/utils.js';
import repl from 'node:repl';
import { YError } from 'yerror';
const REPL_BANNER = `
    _      ____             __     ___  _______  __ 
    | | /| / / /  ___  ___  / /__  / _ \\/ __/ _ \\/ / 
    | |/ |/ / _ \\/ _ \\/ _ \\/  '_/ / , _/ _// ___/ /__
    |__/|__/_//_/\\___/\\___/_/\\_\\ /_/|_/___/_/  /____/

           Inject services with \`.inject\`.
           > .inject log
           > log('info', '👋 - Hello REPL!'); 
`;
async function initREPL({ $ready, $instance, $injector, $dispose, log = noop, stdin = process.stdin, stdout = process.stdout, }) {
    log('debug', '🖵 - Initializing the REPL service!');
    const replPromise = $ready.then(async () => {
        // Wait the event loop to be empty before
        // prompting for commands
        await Promise.resolve();
        stdout.write(REPL_BANNER);
        const loop = repl.start({
            prompt: 'whook> ',
            ignoreUndefined: true,
            breakEvalOnSigint: true,
            input: stdin,
            output: stdout,
        });
        loop.defineCommand('registered', {
            help: 'List registered services.',
            async action() {
                this.clearBufferedCommand();
                stdout.write(`# Registered Services:${$instance
                    .registered()
                    .map((name) => `
- ${name}${name in loop.context ? ' (I)' : ''}`)
                    .join(',')}.
(I: instantiated)
`);
                this.displayPrompt();
            },
        });
        loop.defineCommand('inject', {
            help: 'Inject services.',
            async action(name) {
                this.clearBufferedCommand();
                const services = await $injector(name.split(/\s/g).filter(identity));
                Object.keys(services).forEach((key) => {
                    loop.context[key] = services[key];
                });
                this.displayPrompt();
            },
        });
        loop.on('exit', async () => {
            await $dispose();
        });
        return loop;
    });
    return {
        service: undefined,
        fatalErrorPromise: replPromise
            .catch((err) => {
            throw YError.wrap(err, 'E_REPL_ERROR');
        })
            .then(noop),
        dispose: async () => {
            const loop = await replPromise;
            loop.close();
        },
    };
}
export default location(name('repl', autoProvider(initREPL)), import.meta.url);
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