Adam Johnson adamchainz

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

Update HISTORY.md
Commit the changes:

git add HISTORY.md
git commit -m "Changelog for upcoming release 0.1.1."

Update version number (can also be minor or major)

bumpversion patch

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

	def extract_form_fields(self, soup):
	"Turn a BeautifulSoup form in to a dict of fields and default values"
	fields = {}
	for input in soup.findAll('input'):
	# ignore submit/image with no name attribute
	if input['type'] in ('submit', 'image') and not input.has_key('name'):
	continue

	# single element nome/value fields
	if input['type'] in ('text', 'hidden', 'password', 'submit', 'image'):

	"""
	Import hook extending pytz package with usable, generic timezones:
	GMT-14 up to GMT+12.

	Note that pytz already has Etc/GMT+X timezones, but
	(quoting Wikipedia):

	"In order to conform with the POSIX style, those zones beginning with "Etc/GMT"
	have their sign reversed from what most people expect. In this style,
	zones west of GMT have a positive sign and those east have a negative sign."

	sudo apt-get install --assume-yes python-software-properties
	sudo apt-add-repository ppa:chris-lea/node.js
	sudo apt-get update
	sudo apt-get install --assume-yes nodejs
	sudo apt-get install --assume-yes git

	# Install Graphite
	sudo apt-get install python-dev ruby-dev bundler build-essential libpcre3-dev graphite-carbon graphite-web
	cat >> /tmp/graphite-carbon << EOF
	# Change to true, to enable carbon-cache on boot

	Copyright (c) 2015, Shahar Evron
	All rights reserved.

	Redistribution and use in source and binary forms, with or without modification,
	are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice, this
	list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright notice,

	// Just before switching jobs:
	// Add one of these.
	// Preferably into the same commit where you do a large merge.
	//
	// This started as a tweet with a joke of "C++ pro-tip: #define private public",
	// and then it quickly escalated into more and more evil suggestions.
	// I've tried to capture interesting suggestions here.
	//
	// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
	// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,