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.
NOTE: awesome_print v1.2.0 is the last release supporting Ruby versions
prior to v1.9.3 and Rails versions prior to v3.0. The upcoming awesome_print
v2.0 will require Ruby v1.9.3 or later and Rails v3.0 or later.
Installation
# Installing as Ruby gem
$ gem install awesome_print
# Cloning the repository
$ git clone git://github.com/awesome-print/awesome_print.git
Usage
require "awesome_print"
ap object, options = {}
Default options:
indent: 4, # Number of spaces for indenting.
index: true, # Display array indices.
html: false, # Use ANSI color codes rather than HTML.
multiline: true, # Display in multiple lines.
plain: false, # Use colors.
raw: false, # Do not recursively format instance variables.
sort_keys: false, # Do not sort hash keys.
sort_vars: true, # Sort instance variables.
limit: false, # Limit arrays & hashes. Accepts bool or int.
ruby19_syntax: false, # Use Ruby 1.9 hash syntax in output.
class_name: :class, # Method called to report the instance class name. (e.g. :to_s)
object_id: true, # Show object id.
color: {
args: :pale,
array: :white,
bigdecimal: :blue,
class: :yellow,
date: :greenish,
falseclass: :red,
integer: :blue,
float: :blue,
hash: :pale,
keyword: :cyan,
method: :purpleish,
nilclass: :red,
rational: :blue,
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
Use Object#ai to return an ASCII encoded string:
irb> "awesome print".ai
=> "\e[0;33m\"awesome print\"\e[0m"
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.limit(2).all
[
[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 "awesome_print"
AwesomePrint.irb!
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 "awesome_print"
AwesomePrint.pry!
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 %>
String Convenience Methods
Use methods such as .red to set string color:
irb> puts "red text".red
red text # (it's red)
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
}
}
Versioning
AwesomePrint follows the Semantic Versioning standard.
Contributing
See CONTRIBUTING.md for information.
License
Copyright (c) 2010-2016 Michael Dvorkin and contributors
%w(mike dvorkin.net) * "@", "twitter.com/mid"
Released under the MIT license. See LICENSE file for details.