Deploy a slug tarball to Heroku from node.

deploy-slug.js

#!/usr/bin/env node
/*jslint node:true */
'use strict';

/*
 * Usage:
 *   ./deploy-slug.js my-cool-git-free-app slug.tgz `heroku auth:token`
 */

var fs = require('fs');

var request = require('request');

var name = process.argv[2];
var base = 'https://api.heroku.com/apps/' + name;
var slug = process.argv[3];

var rawToken = process.env.TOKEN || process.argv[4];
var token = (new Buffer(':' + rawToken)).toString('base64');

function allocate(name, done) {
  request.post({
    url: base + '/slugs',
    json: {
      process_types: {}
    },
    headers: {
      'Accept': 'application/vnd.heroku+json; version=3',
      'Authorization': token
    }
  }, function (error, response, body) {
    if (error) {
      console.log(error);
      process.exit(1);
    }

    if (response.statusCode < 200 || response.statusCode >= 300) {
      console.log('Got status ' + response.statusCode + ' trying to allocate a slug.');
      process.exit(1);
    }

    done(null, body.id, body.blob.url);
  });
}

function publish(url, done) {
  var buf = fs.readFileSync(slug);
  var req = request({
    url: url,
    method: 'PUT',
    body: buf,
    headers: {
      'Content-Type': ''
    }
  }, function (error, response, body) {
    if (error) {
      console.log(error);
      process.exit(1);
    }

    if (response.statusCode !== 200) {
      console.log('Got status ' + response.statusCode + ' when publishing the slug to ' + url);
      process.exit(1);
    }

    done(null);
  });
}

function release(id, done) {
  request.post({
    url: base + '/releases',
    json: {
      slug: id
    },
    headers: {
      'Accept': 'application/vnd.heroku+json; version=3',
      'Authorization': token
    }
  }, function (error, response, body) {
    if (error) {
      console.log(error);
      process.exit(1);
    }

    if (response.statusCode !== 201) {
      console.log('Got status code ' + response.statusCode + ' when releasing the slug');
      process.exit(1);
    }

    done(null, body);
  });
}

console.log('Allocating a slug on Heroku for app ' + name);
allocate(name, function (error, id, url) {
  console.log('Slug ID is ' + id);
  console.log('Publishing tarball to Heroku at ' + url);
  publish(url, function (error) {
    console.log('Releasing slug');
    release(id, function (error, body) {
      console.log('Successfully deployed slug.');
      console.log('Version ' + body.version);
      console.log('Updated at ' + body.updated_at);
    });
  });
});