/usr/lib/ruby/vendor_ruby/awesome_print/formatter.rb is in ruby-awesome-print 1.6.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Awesome Print is freely distributable under the terms of MIT license.
# See LICENSE file or http://www.opensource.org/licenses/mit-license.php
#------------------------------------------------------------------------------
autoload :CGI, "cgi"
require "shellwords"
module AwesomePrint
class Formatter
CORE = [ :array, :bigdecimal, :class, :dir, :file, :hash, :method, :rational, :set, :struct, :unboundmethod ]
DEFAULT_LIMIT_SIZE = 7
def initialize(inspector)
@inspector = inspector
@options = inspector.options
@indentation = @options[:indent].abs
end
# Main entry point to format an object.
#------------------------------------------------------------------------------
def format(object, type = nil)
core_class = cast(object, type)
awesome = if core_class != :self
send(:"awesome_#{core_class}", object) # Core formatters.
else
awesome_self(object, type) # Catch all that falls back to object.inspect.
end
awesome
end
# Hook this when adding custom formatters. Check out lib/awesome_print/ext
# directory for custom formatters that ship with awesome_print.
#------------------------------------------------------------------------------
def cast(object, type)
CORE.grep(type)[0] || :self
end
# Pick the color and apply it to the given string as necessary.
#------------------------------------------------------------------------------
def colorize(str, type)
str = CGI.escapeHTML(str) if @options[:html]
if @options[:plain] || !@options[:color][type] || !@inspector.colorize?
str
#
# Check if the string color method is defined by awesome_print and accepts
# html parameter or it has been overriden by some gem such as colorize.
#
elsif str.method(@options[:color][type]).arity == -1 # Accepts html parameter.
str.send(@options[:color][type], @options[:html])
else
str = %Q|<kbd style="color:#{@options[:color][type]}">#{str}</kbd>| if @options[:html]
str.send(@options[:color][type])
end
end
private
# Catch all method to format an arbitrary object.
#------------------------------------------------------------------------------
def awesome_self(object, type)
if @options[:raw] && object.instance_variables.any?
awesome_object(object)
elsif object.respond_to?(:to_hash)
awesome_hash(object.to_hash)
else
colorize(object.inspect.to_s, type)
end
end
# Format an array.
#------------------------------------------------------------------------------
def awesome_array(a)
return "[]" if a == []
if a.instance_variable_defined?('@__awesome_methods__')
methods_array(a)
elsif @options[:multiline]
width = (a.size - 1).to_s.size
data = a.inject([]) do |arr, item|
index = indent
index << colorize("[#{arr.size.to_s.rjust(width)}] ", :array) if @options[:index]
indented do
arr << (index << @inspector.awesome(item))
end
end
data = limited(data, width) if should_be_limited?
"[\n" << data.join(",\n") << "\n#{outdent}]"
else
"[ " << a.map{ |item| @inspector.awesome(item) }.join(", ") << " ]"
end
end
# Format a hash. If @options[:indent] if negative left align hash keys.
#------------------------------------------------------------------------------
def awesome_hash(h)
return "{}" if h == {}
keys = @options[:sort_keys] ? h.keys.sort { |a, b| a.to_s <=> b.to_s } : h.keys
data = keys.map do |key|
plain_single_line do
[ @inspector.awesome(key), h[key] ]
end
end
width = data.map { |key, | key.size }.max || 0
width += @indentation if @options[:indent] > 0
data = data.map do |key, value|
indented do
align(key, width) << colorize(" => ", :hash) << @inspector.awesome(value)
end
end
data = limited(data, width, :hash => true) if should_be_limited?
if @options[:multiline]
"{\n" << data.join(",\n") << "\n#{outdent}}"
else
"{ #{data.join(', ')} }"
end
end
# Format an object.
#------------------------------------------------------------------------------
def awesome_object(o)
vars = o.instance_variables.map do |var|
property = var.to_s[1..-1].to_sym # to_s because of some monkey patching done by Puppet.
accessor = if o.respond_to?(:"#{property}=")
o.respond_to?(property) ? :accessor : :writer
else
o.respond_to?(property) ? :reader : nil
end
if accessor
[ "attr_#{accessor} :#{property}", var ]
else
[ var.to_s, var ]
end
end
data = vars.sort.map do |declaration, var|
key = left_aligned do
align(declaration, declaration.size)
end
unless @options[:plain]
if key =~ /(@\w+)/
key.sub!($1, colorize($1, :variable))
else
key.sub!(/(attr_\w+)\s(\:\w+)/, "#{colorize('\\1', :keyword)} #{colorize('\\2', :method)}")
end
end
indented do
key << colorize(" = ", :hash) + @inspector.awesome(o.instance_variable_get(var))
end
end
if @options[:multiline]
"#<#{awesome_instance(o)}\n#{data.join(%Q/,\n/)}\n#{outdent}>"
else
"#<#{awesome_instance(o)} #{data.join(', ')}>"
end
end
# Format a set.
#------------------------------------------------------------------------------
def awesome_set(s)
awesome_array(s.to_a)
end
# Format a Struct.
#------------------------------------------------------------------------------
def awesome_struct(s)
#
# The code is slightly uglier because of Ruby 1.8.6 quirks:
# awesome_hash(Hash[s.members.zip(s.values)]) <-- ArgumentError: odd number of arguments for Hash)
# awesome_hash(Hash[*s.members.zip(s.values).flatten]) <-- s.members returns strings, not symbols.
#
hash = {}
s.each_pair { |key, value| hash[key] = value }
awesome_hash(hash)
end
# Format Class object.
#------------------------------------------------------------------------------
def awesome_class(c)
if superclass = c.superclass # <-- Assign and test if nil.
colorize("#{c.inspect} < #{superclass}", :class)
else
colorize(c.inspect, :class)
end
end
# Format File object.
#------------------------------------------------------------------------------
def awesome_file(f)
ls = File.directory?(f) ? `ls -adlF #{f.path.shellescape}` : `ls -alF #{f.path.shellescape}`
colorize(ls.empty? ? f.inspect : "#{f.inspect}\n#{ls.chop}", :file)
end
# Format Dir object.
#------------------------------------------------------------------------------
def awesome_dir(d)
ls = `ls -alF #{d.path.shellescape}`
colorize(ls.empty? ? d.inspect : "#{d.inspect}\n#{ls.chop}", :dir)
end
# Format BigDecimal object.
#------------------------------------------------------------------------------
def awesome_bigdecimal(n)
colorize(n.to_s("F"), :bigdecimal)
end
# Format Rational object.
#------------------------------------------------------------------------------
def awesome_rational(n)
colorize(n.to_s, :rational)
end
# Format a method.
#------------------------------------------------------------------------------
def awesome_method(m)
name, args, owner = method_tuple(m)
"#{colorize(owner, :class)}##{colorize(name, :method)}#{colorize(args, :args)}"
end
alias :awesome_unboundmethod :awesome_method
# Format object instance.
#------------------------------------------------------------------------------
def awesome_instance(o)
"#{o.class}:0x%08x" % (o.__id__ * 2)
end
# Format object.methods array.
#------------------------------------------------------------------------------
def methods_array(a)
a.sort! { |x, y| x.to_s <=> y.to_s } # Can't simply a.sort! because of o.methods << [ :blah ]
object = a.instance_variable_get('@__awesome_methods__')
tuples = a.map do |name|
if name.is_a?(Symbol) || name.is_a?(String) # Ignore garbage, ex. 42.methods << [ :blah ]
tuple = if object.respond_to?(name, true) # Is this a regular method?
the_method = object.method(name) rescue nil # Avoid potential ArgumentError if object#method is overridden.
if the_method && the_method.respond_to?(:arity) # Is this original object#method?
method_tuple(the_method) # Yes, we are good.
end
elsif object.respond_to?(:instance_method) # Is this an unbound method?
method_tuple(object.instance_method(name)) rescue nil # Rescue to avoid NameError when the method is not
end # available (ex. File.lchmod on Ubuntu 12).
end
tuple || [ name.to_s, '(?)', '?' ] # Return WTF default if all the above fails.
end
width = (tuples.size - 1).to_s.size
name_width = tuples.map { |item| item[0].size }.max || 0
args_width = tuples.map { |item| item[1].size }.max || 0
data = tuples.inject([]) do |arr, item|
index = indent
index << "[#{arr.size.to_s.rjust(width)}]" if @options[:index]
indented do
arr << "#{index} #{colorize(item[0].rjust(name_width), :method)}#{colorize(item[1].ljust(args_width), :args)} #{colorize(item[2], :class)}"
end
end
"[\n" << data.join("\n") << "\n#{outdent}]"
end
# Return [ name, arguments, owner ] tuple for a given method.
#------------------------------------------------------------------------------
def method_tuple(method)
if method.respond_to?(:parameters) # Ruby 1.9.2+
# See http://ruby.runpaint.org/methods#method-objects-parameters
args = method.parameters.inject([]) do |arr, (type, name)|
name ||= (type == :block ? 'block' : "arg#{arr.size + 1}")
arr << case type
when :req then name.to_s
when :opt, :rest then "*#{name}"
when :block then "&#{name}"
else '?'
end
end
else # See http://ruby-doc.org/core/classes/Method.html#M001902
args = (1..method.arity.abs).map { |i| "arg#{i}" }
args[-1] = "*#{args[-1]}" if method.arity < 0
end
# method.to_s formats to handle:
#
# #<Method: Fixnum#zero?>
# #<Method: Fixnum(Integer)#years>
# #<Method: User(#<Module:0x00000103207c00>)#_username>
# #<Method: User(id: integer, username: string).table_name>
# #<Method: User(id: integer, username: string)(ActiveRecord::Base).current>
# #<UnboundMethod: Hello#world>
#
if method.to_s =~ /(Unbound)*Method: (.*)[#\.]/
unbound, klass = $1 && '(unbound)', $2
if klass && klass =~ /(\(\w+:\s.*?\))/ # Is this ActiveRecord-style class?
klass.sub!($1, '') # Yes, strip the fields leaving class name only.
end
owner = "#{klass}#{unbound}".gsub('(', ' (')
end
[ method.name.to_s, "(#{args.join(', ')})", owner.to_s ]
end
# Format hash keys as plain strings regardless of underlying data type.
#------------------------------------------------------------------------------
def plain_single_line
plain, multiline = @options[:plain], @options[:multiline]
@options[:plain], @options[:multiline] = true, false
yield
ensure
@options[:plain], @options[:multiline] = plain, multiline
end
# Utility methods.
#------------------------------------------------------------------------------
def align(value, width)
if @options[:multiline]
if @options[:indent] > 0
value.rjust(width)
elsif @options[:indent] == 0
indent + value.ljust(width)
else
indent[0, @indentation + @options[:indent]] + value.ljust(width)
end
else
value
end
end
def indented
@indentation += @options[:indent].abs
yield
ensure
@indentation -= @options[:indent].abs
end
def left_aligned
current, @options[:indent] = @options[:indent], 0
yield
ensure
@options[:indent] = current
end
def indent
' ' * @indentation
end
def outdent
' ' * (@indentation - @options[:indent].abs)
end
# To support limited output, for example:
#
# ap ('a'..'z').to_a, :limit => 3
# [
# [ 0] "a",
# [ 1] .. [24],
# [25] "z"
# ]
#
# ap (1..100).to_a, :limit => true # Default limit is 7.
# [
# [ 0] 1,
# [ 1] 2,
# [ 2] 3,
# [ 3] .. [96],
# [97] 98,
# [98] 99,
# [99] 100
# ]
#------------------------------------------------------------------------------
def should_be_limited?
@options[:limit] == true or (@options[:limit].is_a?(Fixnum) and @options[:limit] > 0)
end
def get_limit_size
@options[:limit] == true ? DEFAULT_LIMIT_SIZE : @options[:limit]
end
def limited(data, width, is_hash = false)
limit = get_limit_size
if data.length <= limit
data
else
# Calculate how many elements to be displayed above and below the separator.
head = limit / 2
tail = head - (limit - 1) % 2
# Add the proper elements to the temp array and format the separator.
temp = data[0, head] + [ nil ] + data[-tail, tail]
if is_hash
temp[head] = "#{indent}#{data[head].strip} .. #{data[data.length - tail - 1].strip}"
else
temp[head] = "#{indent}[#{head.to_s.rjust(width)}] .. [#{data.length - tail - 1}]"
end
temp
end
end
end
end
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