heroku-cli-util

heroku-cli-util

Set of helpful CLI utilities

Installation

npm install heroku-cli-util --save

Action

let cli     = require('heroku-cli-util');
let promise = heroku.apps(appname).info();
let app     = yield cli.action('getting apps', promise);
console.log(`app name: ${app.name}`);

// getting apps... done
// app name: appname

Note: to use yield you need to wrap this in a co block.

Prompt

Callback style

let cli = require('heroku-cli-util');
cli.prompt('email', {}, function (_, email) {
  console.log(`your email is: ${email}`);
});

Promise style

let cli = require('heroku-cli-util');
cli.prompt('email', {}).then(function (email) {
  console.log(`your email is: ${email}`);
});

Generator style (must be wrapped in a co block)

let cli   = require('heroku-cli-util');
let email = yield cli.prompt('email', {});
console.log(`your email is: ${email}`);

cli.prompt options

cli.prompt('email', {
  mask: true, // mask input field after submitting
  hide: true // mask characters while entering
});

Confirm App

Supports the same async styles as prompt(). Errors if not confirmed.

Basic

let cli = require('heroku-cli-util');
yield cli.confirmApp('appname', context.flags.confirm);

// !     WARNING: Destructive Action
// !     This command will affect the app appname
// !     To proceed, type appname or re-run this command with --confirm appname

> appname

Custom message

let cli = require('heroku-cli-util');
yield cli.confirmApp('appname', context.flags.confirm, 'foo');

// !     foo
// !     To proceed, type appname or re-run this command with --confirm appname

> appname

Errors

let cli = require('heroku-cli-util');
cli.error("App not found");
// !    App not found

Warnings

let cli = require('heroku-cli-util');
cli.warn("App not found");
// !    App not found

Dates

let cli = require('heroku-cli-util');
let d   = new Date();
console.log(cli.formatDate(d));
// 2001-01-01T08:00:00.000Z

Hush

Use hush for verbose logging when HEROKU_DEBUG=1.

let cli = require('heroku-cli-util');
cli.hush('foo');
// only prints if HEROKU_DEBUG is set

Debug

Pretty print an object.

let cli = require('heroku-cli-util');
cli.debug({foo: [1,2,3]});
// { foo: [ 1, 2, 3 ] }

Stylized output

Pretty print a header and hash

let cli = require('heroku-cli-util');
cli.styledHeader("MyApp");
cli.styledHash({name: "myapp", collaborators: ["[e-mail]", "[e-mail]"]});

Produces

=== MyApp
Collaborators: [e-mail]
               [e-mail]
Name:          myapp

Table

cli.table([
  {app: 'first-app',  language: 'ruby', dyno_count: 3},
  {app: 'second-app', language: 'node', dyno_count: 2},
], {
  columns: [
    {key: 'app'},
    {key: 'dyno_count', label: 'Dyno Count'},
    {key: 'language', format: language => cli.color.red(language)},
  ]
});

Produces:

app         Dyno Count  language
──────────  ──────────  ────────
first-app   3           ruby
second-app  2           node

Mocking

Mock stdout and stderr by using cli.log() and cli.error().

let cli = require('heroku-cli-util');
cli.log('message 1'); // prints 'message 1'
cli.mockConsole();
cli.log('message 2'); // prints nothing
cli.stdout.should.eq('message 2\n');

Command

Used for initializing a plugin command. give you an auth'ed instance of heroku-client and cleanly handle API exceptions.

It expects you to return a promise chain. This is usually done with co.

let cli = require('heroku-cli-util');
let co  = require('co');
module.exports.commands = [
  {
    topic: 'apps',
    command: 'info',
    needsAuth: true,
    needsApp: true,
    run: cli.command(function (context, heroku) {
      return co(function* () {
        let app = yield heroku.apps(context.app).info();
        console.dir(app);
      });
    })
  }
];

With options:

let cli = require('heroku-cli-util');
let co  = require('co');
module.exports.commands = [
  {
    topic: 'apps',
    command: 'info',
    needsAuth: true,
    needsApp: true,
    run: cli.command(
      {preauth: true},
      function (context, heroku) {
        return co(function* () {
          let app = yield heroku.apps(context.app).info();
          console.dir(app);
        });
      }
    )
  }
];

If the command has a two_factor API error, it will ask the user for a 2fa code and retry. If you set preauth: true it will preauth against the current app instead of just setting the header on an app. (This is necessary if you need to do more than 1 API call that will require 2fa)

Tests

npm install
npm test

License

ISC