Issei Naruta mirakui

mirakui / jpeg_markers.rb

Created September 17, 2012 02:53

Extract width and height from JPEG format

mirakui / memo.txt

Created September 2, 2012 12:48

ffmpeg+ImageMagickによる分割アニメーションGIF作成コマンドメモ

	# 元の動画をトリミング
	ffmpeg -i DSC_3872.avi -vcodec copy -acodec copy -ss '00:00:04.33' -t '00:00:05.48' trim01.avi
	# 横幅500px（tumblrの上限）にリサイズしつつ animated gif に変換
	convert -resize 500 trim01.avi trim01.gif
	# 明るさ・コントラストをいじりつつ63色に減色（クロップ処理後に1MBに収まるように色数調整）
	convert -brightness-contrast 40x40 -colors 63 trim01.gif trim01-v3.gif
	# 横3x縦2にクロップする（画像同士の間隔は10px）
	convert -crop 160x135+0+0 +repage trim01-v3.gif trim01-v3-1.gif
	convert -crop 160x135+170+0 +repage trim01-v3.gif trim01-v3-2.gif
	convert -crop 160x135+340+0 +repage trim01-v3.gif trim01-v3-3.gif

mirakui / unicorn_restart.rb

Created August 27, 2012 03:54

Restarting Unicorn Synchronously

	#!/usr/bin/env ruby
	require "optparse"

	def usage
	STDERR.puts "usage: #{$0} /path/to/unicorn.pid [-t timeout_sec]"
	end

	timeout = 60

	pidfile = ARGV.shift

mirakui / foo_controller.rb

Created August 20, 2012 15:18

大域的なperform_cachingの値にかかわらずcaches_actionのテストをする

	class FooController < ApplicationController
	caches_action :index

	def index
	render :text => Time.now
	end
	end

mirakui / gist:3206331

Created July 30, 2012 11:32

mirakui / benchmarker.txt

Created June 12, 2012 14:09

WTF profiler and benchmarker in Rails 3.2

	% rails -v
	Rails 3.2.5
	% rails benchmarker -h
	Usage: rails benchmarker 'Ruby.code' 'Ruby.more_code' ... [OPTS]
	-r, --runs N Number of runs.
	Default: 4
	-o, --output PATH Directory to use when writing the results.
	Default: tmp/performance
	-m, --metrics a,b,c Metrics to use.
	Default: wall_time,memory,objects,gc_runs,gc_time

mirakui / how-to-use

Created May 22, 2012 14:04

Remote operation script

	$ cat script.txt
	grep hoge /var/log/nginx/access.log
	$ rop.rb -H 'app-0{01..05}' -f script.txt
	/tmp/rop/0522-2306-11/app-001
	/tmp/rop/0522-2306-11/app-002
	/tmp/rop/0522-2306-11/app-003
	/tmp/rop/0522-2306-11/app-004
	/tmp/rop/0522-2306-11/app-005

mirakui / readonly_console.rb

Created May 1, 2012 02:08

readonly rails console using Arproxy

	#!/usr/bin/env ruby
	APP_PATH = File.expand_path('../../config/application', __FILE__)
	require File.expand_path('../../config/boot', __FILE__)
	require 'rails/commands/console'
	require APP_PATH
	Rails.application.require_environment!

	require "arproxy"
	module Arproxy
	class Readonly < Base

mirakui / gist:1443041

Created December 7, 2011 14:38

puts with format

	[STDOUT, STDERR].each do \|io\|
	io.instance_eval do
	def puts_with_format(*arg)
	print "[#{Time.now.strftime("%Y-%m-%d %H:%M:%S")} ##{$$}] "
	puts_without_format *arg
	end
	alias puts_without_format puts
	alias puts puts_with_format
	end
	end

mirakui / nenshu.rb

Created December 1, 2011 13:36

うわっ…私の二分探索ショボすぎ…？