Awesome Print
Awesome Print is a Ruby library that pretty prints Ruby objects in full color exposing their internal structure with proper indentation. Rails ActiveRecord objects and usage within Rails templates are supported via included mixins.
Installation
# Installing as Ruby gem
$ gem install awesome_print
# Cloning the repository
$ git clone git://github.com/michaeldv/awesome_print.git
Usage
require "awesome_print"
ap object, options = {}
Default options:
:indent => 4, # Indent using 4 spaces.
:index => true, # Display array indices.
:html => false, # Use ANSI color codes rather than HTML.
:multiline => true, # Display in multiple lines.
:plain => false, # Use colors.
:sort_keys => false, # Do not sort hash keys.
:limit => false, # Limit large output for arrays and hashes. Set to a boolean or integer.
:color => {
:args => :pale,
:array => :white,
:bigdecimal => :blue,
:class => :yellow,
:date => :greenish,
:falseclass => :red,
:fixnum => :blue,
:float => :blue,
:hash => :pale,
:keyword => :cyan,
:method => :purpleish,
:nilclass => :red,
:string => :yellowish,
:struct => :pale,
:symbol => :cyanish,
:time => :greenish,
:trueclass => :green,
:variable => :cyanish
}
Supported color names:
:gray, :red, :green, :yellow, :blue, :purple, :cyan, :white
:black, :redish, :greenish, :yellowish, :blueish, :purpleish, :cyanish, :pale
Examples
$ cat > 1.rb
require "awesome_print"
data = [ false, 42, %w(forty two), { :now => Time.now, :class => Time.now.class, :distance => 42e42 } ]
ap data
^D
$ ruby 1.rb
[
[0] false,
[1] 42,
[2] [
[0] "forty",
[1] "two"
],
[3] {
:class => Time < Object,
:now => Fri Apr 02 19:55:53 -0700 2010,
:distance => 4.2e+43
}
]
$ cat > 2.rb
require "awesome_print"
data = { :now => Time.now, :class => Time.now.class, :distance => 42e42 }
ap data, :indent => -2 # <-- Left align hash keys.
^D
$ ruby 2.rb
{
:class => Time < Object,
:now => Fri Apr 02 19:55:53 -0700 2010,
:distance => 4.2e+43
}
$ cat > 3.rb
require "awesome_print"
data = [ false, 42, %w(forty two) ]
data << data # <-- Nested array.
ap data, :multiline => false
^D
$ ruby 3.rb
[ false, 42, [ "forty", "two" ], [...] ]
$ cat > 4.rb
require "awesome_print"
class Hello
def self.world(x, y, z = nil, &blk)
end
end
ap Hello.methods - Class.methods
^D
$ ruby 4.rb
[
[0] world(x, y, *z, &blk) Hello
]
$ cat > 5.rb
require "awesome_print"
ap (''.methods - Object.methods).grep(/!/)
^D
$ ruby 5.rb
[
[ 0] capitalize!() String
[ 1] chomp!(*arg1) String
[ 2] chop!() String
[ 3] delete!(*arg1) String
[ 4] downcase!() String
[ 5] encode!(*arg1) String
[ 6] gsub!(*arg1) String
[ 7] lstrip!() String
[ 8] next!() String
[ 9] reverse!() String
[10] rstrip!() String
[11] slice!(*arg1) String
[12] squeeze!(*arg1) String
[13] strip!() String
[14] sub!(*arg1) String
[15] succ!() String
[16] swapcase!() String
[17] tr!(arg1, arg2) String
[18] tr_s!(arg1, arg2) String
[19] upcase!() String
]
$ cat > 6.rb
require "awesome_print"
ap 42 == ap(42)
^D
$ ruby 6.rb
42
true
$ cat 7.rb
require "awesome_print"
some_array = (1..1000).to_a
ap some_array, :limit => true
^D
$ ruby 7.rb
[
[ 0] 1,
[ 1] 2,
[ 2] 3,
[ 3] .. [996],
[997] 998,
[998] 999,
[999] 1000
]
$ cat 8.rb
require "awesome_print"
some_array = (1..1000).to_a
ap some_array, :limit => 5
^D
$ ruby 8.rb
[
[ 0] 1,
[ 1] 2,
[ 2] .. [997],
[998] 999,
[999] 1000
]
Example (Rails console)
$ rails console
rails> require "awesome_print"
rails> ap Account.all(:limit => 2)
[
[0] #<Account:0x1033220b8> {
:id => 1,
:user_id => 5,
:assigned_to => 7,
:name => "Hayes-DuBuque",
:access => "Public",
:website => "http://www.hayesdubuque.com",
:toll_free_phone => "1-800-932-6571",
:phone => "(111)549-5002",
:fax => "(349)415-2266",
:deleted_at => nil,
:created_at => Sat, 06 Mar 2010 09:46:10 UTC +00:00,
:updated_at => Sat, 06 Mar 2010 16:33:10 UTC +00:00,
:email => "info@hayesdubuque.com",
:background_info => nil
},
[1] #<Account:0x103321ff0> {
:id => 2,
:user_id => 4,
:assigned_to => 4,
:name => "Ziemann-Streich",
:access => "Public",
:website => "http://www.ziemannstreich.com",
:toll_free_phone => "1-800-871-0619",
:phone => "(042)056-1534",
:fax => "(106)017-8792",
:deleted_at => nil,
:created_at => Tue, 09 Feb 2010 13:32:10 UTC +00:00,
:updated_at => Tue, 09 Feb 2010 20:05:01 UTC +00:00,
:email => "info@ziemannstreich.com",
:background_info => nil
}
]
rails> ap Account
class Account < ActiveRecord::Base {
:id => :integer,
:user_id => :integer,
:assigned_to => :integer,
:name => :string,
:access => :string,
:website => :string,
:toll_free_phone => :string,
:phone => :string,
:fax => :string,
:deleted_at => :datetime,
:created_at => :datetime,
:updated_at => :datetime,
:email => :string,
:background_info => :string
}
rails>
IRB integration
To use awesome_print as default formatter in irb and Rails console add the following code to your ~/.irbrc file:
require "rubygems"
require "awesome_print"
unless IRB.version.include?('DietRB')
IRB::Irb.class_eval do
def output_value
ap @context.last_value
end
end
else # MacRuby
IRB.formatter = Class.new(IRB::Formatter) do
def inspect_object(object)
object.ai
end
end.new
end
PRY integration
If you miss awesome_print's way of formatting output, here's how you can use it in place of the formatting which comes with pry. Add the following code to your ~/.pryrc:
require "rubygems"
require "awesome_print"
Pry.print = proc { |output, value| output.puts value.ai }
Logger Convenience Method
awesome_print adds the 'ap' method to the Logger and ActiveSupport::BufferedLogger classes letting you call:
logger.ap object
By default, this logs at the :debug level. You can override that globally with:
:log_level => :info
in the custom defaults (see below). You can also override on a per call basis with:
logger.ap object, :warn
ActionView Convenience Method
awesome_print adds the 'ap' method to the ActionView::Base class making it available within Rails templates. For example:
<%= ap @accounts.first %> # ERB
!= ap @accounts.first # HAML
With other web frameworks (ex: in Sinatra templates) you can explicitly request HTML formatting:
<%= ap @accounts.first, :html => true %>
Setting Custom Defaults
You can set your own default options by creating .aprc file in your home
directory. Within that file assign your defaults to AwesomePrint.defaults.
For example:
# ~/.aprc file.
AwesomePrint.defaults = {
:indent => -2,
:color => {
:hash => :pale,
:class => :white
}
}
Running Specs
$ gem install rspec # RSpec 2.x is the requirement.
$ rake spec # Run the entire spec suite.
$ rspec spec/logger_spec.rb # Run individual spec file.
Note on Patches/Pull Requests
- Fork the project on Github.
- Make your feature addition or bug fix.
- Add specs for it, making sure $ rake spec is all green.
- Commit, do not mess with rakefile, version, or history.
- Send me a pull request.
Contributors
- Adam Doppelt -- https://github.com/gurgeous
- Andrew O'Brien -- https://github.com/AndrewO
- Andrew Horsman -- https://github.com/basicxman
- Benoit Daloze -- http://github.com/eregon
- Brandon Zylstra -- https://github.com/brandondrew
- Daniel Johnson -- https://github.com/adhd360
- Daniel Bretoi -- http://github.com/danielb2
- Eloy Duran -- http://github.com/alloy
- Elpizo Choi -- https://github.com/fuJiin
- Greg Weber -- https://github.com/gregwebs
- Jeff Felchner -- https://github.com/jfelchner
- Sean Gallagher -- http://github.com/torandu
- Stephan Hagemann -- https://github.com/shageman
- Tim Harper -- http://github.com/timcharper
- Tobias Crawley -- http://github.com/tobias
- Viktar Basharymau -- https://github.com/DNNX
License
Copyright (c) 2010-2011 Michael Dvorkin
twitter.com/mid
%w(mike dvorkin.net) * "@" || %w(mike fatfreecrm.com) * "@"
Released under the MIT license. See LICENSE file for details.