Christos Zisopoulos christos

To symlink SSH_AUTH_SOCK on boot to system-wide switch the value from default ssh agent:

Change /opt/homebrew/ to the correct homebrew path (/opt/homebrew is for Apple Silicon and /usr/local for x86)
Change the ssh agent as needed, this example uses https://github.com/FiloSottile/yubikey-agent
Save as ~/Library/LaunchAgents/link-ssh-auth-sock.plist
Run launchctl load -F ~/Library/LaunchAgents/link-ssh-auth-sock.plist

Technique taken from: https://evilmartians.com/chronicles/stick-with-security-yubikey-ssh-gnupg-macos

## GistList: TODO for coders

Finding a Ruby memory leak using a time analysis

When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.

There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the

	# I would really like to introspect complex authorization rules to understand why users can/cannot perform an action.
	# That helps with debugging and offers better error messages.

	# Sample:
	#
	# ```ruby
	# auth = Authorize.new(CanUpdate, owner, message_1)
	# pp auth.permitted? # => false
	# pp auth.explain
	# # => "(❌ IsAdmin) or (✅ IsPublisher and ❌ IsOwner)"

	require 'benchmark/ips'
	require 'redis'
	class MethodProfiler
	def self.patch(klass, methods, name)
	patches = methods.map do \|method_name\|
	<<~RUBY
	unless defined?(#{method_name}__mp_unpatched)
	alias_method :#{method_name}__mp_unpatched, :#{method_name}
	def #{method_name}(*args, &blk)
	unless prof = Thread.current[:_method_profiler]

	default: &default
	adapter: mysql2
	encoding: utf8mb4
	username: root
	password:
	host: localhost
	variables:
	sql_mode: TRADITIONAL,NO_AUTO_VALUE_ON_ZERO,ONLY_FULL_GROUP_BY

	development:

	#!/bin/sh

	# Alot of these configs have been taken from the various places
	# on the web, most from here
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

	# Set the colours you can use
	black='\033[0;30m'
	white='\033[0;37m'
	red='\033[0;31m'

	# Usage:
	#
	# ruby irpf.rb tax_base
	#
	# Example:
	#
	# ruby irpf.rb 65300
	# 65300 €, 22722 €, 34.8%
	#
	# Where 22,722 € is the IRPF to pay, and 34.8% is the real rate, that is,

	#!/bin/sh
	### BEGIN INIT INFO
	# Provides: haproxy
	# Required-Start: $local_fs $network $remote_fs
	# Required-Stop: $local_fs $remote_fs
	# Default-Start: 2 3 4 5
	# Default-Stop: 0 1 6
	# Short-Description: fast and reliable load balancing reverse proxy
	# Description: This file should be used to start and stop haproxy.
	### END INIT INFO

	access_key_id = ENV.fetch("APP_S3_ACCESS_KEY_ID")
	secret_access_key = ENV.fetch("APP_S3_SECRET_ACCESS_KEY")
	bucket_name = ENV.fetch("APP_S3_BUCKET")

	s3 = AWS::S3.new(access_key_id: access_key_id, secret_access_key: secret_access_key)
	bucket = s3.buckets[bucket_name]
	object = bucket.objects["whatever/you/want"]
	presign = AWS::S3::PresignV4.new(object)
	presign.presign(:put, expires: 15.minutes.from_now.to_i)
	# => #<URI::HTTP:0x007fcfcd97e1a0 URL:*stuff*>