mars

# Rack middleware that reads environment variable HOST (value such as: app.example.com)
# to override request Host headers, forcing the app to use this value for URLs & redirects.
#
# If env var HOST is unset, then this middleware does nothing.
#
# Useful for when a Rails app is the origin behind a CDN/proxy, so that all generated
# URLs point to the canonical hostname of the CDN, and not the origin itself.
#
# For a Rails app,
# - save this file in config/initializers/set_default_host.rb

mars

#!/bin/bash
set -u

echo "Checking for response status ${1} from URL: ${2}"
try_count=0
while true
do
  ((try_count++))
  response_status="$(curl -s -o /dev/null -w "%{http_code}" "${2}")"
  if [ "$response_status" == "${1}" ]

mars

require 'yaml'
require 'pathname'
require 'active_support/all'

def convert(f)
  filename = Pathname.new(f)
  yaml = YAML.load_file(filename)
  name = filename.basename('.yml').to_s

  File.write(filename, {

mars

There's a lot of knowledge to be had about buildpacks. Start with reading the main docs:

• https://devcenter.heroku.com/articles/buildpacks
• https://devcenter.heroku.com/articles/buildpack-api

Set your scripts to fail quickly & loudly

bash inherently swallows errors thrown by commands. Use the following at the top of your compile script:

mars

## Global install of the app generator
npm install -g create-react-app

## Setup the app (first-time only)
create-react-app my-app
cd my-app
git init

# Create the Heroku app; requires free account at https://www.heroku.com/
heroku create -b https://github.com/heroku/heroku-buildpack-static.git

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#!/usr/bin/env bash

# Fail immediately on non-zero exit code.
set -e
# Fail immediately on non-zero exit code within a pipeline.
set -o pipefail
# Fail on undeclared variables.
set -u
# Debug, echo every command
#set -x

mars

Action & Adventure based on a book from the 1960s (4082)
Action & Adventure based on a book from the 1970s (2410)
Action & Adventure based on a book from the 1980s (704)
Action & Adventure based on real life from the 1980s (1051)
Action & Adventure directed by Andrew V. McLaglen (2282)
Action & Adventure directed by Cirio H. Santiago (4323)
Action & Adventure directed by Clint Eastwood (4998)
Action & Adventure directed by Corey Yuen (291)
Action & Adventure directed by George Archainbaud (3183)
Action & Adventure directed by George Sherman (3198)

mars

Installing Cassandra on Mac OS X

Install Homebrew

Homebrew is a great little package manager for OS X. If you haven't already, installing it is pretty easy:

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

mars

/*
Filepicker lib must be loaded from script tag in HTML:
    <script type="text/javascript" src="//api.filepicker.io/v2/filepicker.js"></script>
*/
class FilepickerInput extends React.Component {

  componentDidMount() {
    const filepickerElement = this.refs.filepicker;
    if (typeof filepicker !== 'undefined') {
      // Single-page app integration: https://developers.filepicker.com/docs/support/integration/117

mars

import React from 'react';

// Top-level Route component receives the router in context and passes it onto each child's props
export default class AppView extends React.Component {
  render() {
    return (
      <div className="container">
        {
          // Add `props.router` to each route component
          React.Children.map(this.props.children, c => {