Nic Boie boie0025

Installing a Gem on Heroku from a Private GitHub Repo

Sometimes you want to use a gem on Heroku that is in a private repository on GitHub.

Using git over http you can authenticate to GitHub using basic authentication. However, we don't want to embed usernames and passwords in Gemfiles. Instead, we can use authentication tokens.

Get an OAuth Token from GitHub

First you will need to get an OAuth Token from GitHub using your own username and "note"

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

This was going to go into a blog post, but was removed after discussion around it being a Bad Thing for customers to do.

Changing the count and memory limit of Passenger processes

To stop applications that are prone to bloating quickly exhausting all the memory on an application instance, we have a script called passenger_monitor that checks for runaway Passenger processes every minute via a cron job. By default, this script is going to look for Passenger workers that are using over 215MB of memory and kill them. Passenger will restart them when needed. We tune the number of workers that run by default on your application instances, based on the memory specifications so that the memory is sensibly utilized. However, if your application legitimately requires more memory than this (i.e. it isn’t bloating) then it may be advantageous for you to reduce the worker count, and allow the lower number of workers to use more memory.

Doing this involves two areas of customization; modifying the Nginx configuratio

	---
	title: Sitemap
	slug: sitemap
	is_layout: false
	listed: false
	published: true
	cache_strategy: none
	response_type: text/xml
	position: 1
	---

	$('.array-of-hashes-tables').on('click', '.array-of-hashes-table .remove', function(event) {
	event.preventDefault();
	$(this).closest('.array-of-hashes-table').remove();
	});

	$('.array_of_hashes .add').on('click', function(event) {
	event.preventDefault();
	var $this = $(this);
	var $tables = $this.siblings('.array-of-hashes-tables');
	var $cloneable = $tables.find('.cloneable').first();

	# vim style tmux config

	# use C-a, since it's on the home row and easier to hit than C-b
	set-option -g prefix C-a
	unbind-key C-a
	bind-key C-a send-prefix
	set -g base-index 1

	# Easy config reload
	bind-key R source-file ~/.tmux.conf \; display-message "tmux.conf reloaded."

	# app/policies/active_admin/
	module ActiveAdmin
	class CommentPolicy < ApplicationPolicy
	class Scope < Struct.new(:user, :scope)
	def resolve
	scope
	end
	end
	end
	end

	Guide & Discussion Thread:

	http://forum.netkas.org/index.php?topic=874.0
	http://forum.netkas.org/index.php?action=printpage;topic=874.0

	For the best guide, use search keyword: chmod. Scrolls down to -->
	Post by: Shinso on September 18, 2012, 07:28:35 PM
	Post by: Shinso on September 18, 2012, 07:30:19 PM

	* First: upgrade cpu to Core2Duo

	#!/usr/bin/env ruby
	# extracts the embedded PNG data from .skitch SVG files

	require 'nokogiri'
	require 'base64'

	IMAGE_HEADER = "data:image/png;base64,"

	ARGV.each do \|filename\|
	svg_document = Nokogiri::XML(File.open(filename))

	$ brew install libmagic
	$ brew link libmagic (if the link is already created is going to fail, don't worry about that)
	$ env ARCHFLAGS="-arch x86_64" gem install ruby-filemagic -- --with-magic-include=/usr/local/include --with-magic-lib=/usr/local/lib/