RubyExtBacktrace
Provides extended backtrace for ruby, including method parameters values.
Installation
Add this line to your application's Gemfile:
gem 'ruby_ext_backtrace'
And then execute:
$ bundle
Or install it yourself as:
$ gem install ruby_ext_backtrace
Usage
Once loaded, gem provides global method caller_ext, similar to Kernel#caller, but returning an array of hashes.
require 'pp'
require 'ruby_ext_backtrace'
def some_method2 param
c1 = caller_ext(0); c2 = caller(0)
pp c1
puts "\n#Original caller for comparison:"
pp c2
end
def some_method param1, param2=nil, *splat, &blk
yield "block_param0", "block_param1"
end
some_method(1111, nil, 1, 2, 3){|bp1,bp2|
some_method2 "some_method2_param"
}this outputs:
[{:file=>"test.rb",
:line=>10,
:method=>"some_method2",
:argc=>1,
0=>"some_method2_param"},
{:file=>"test.rb",
:line=>21,
:method=>"block in <main>",
:argc=>2,
0=>"block_param0",
1=>"block_param1"},
{:file=>"test.rb",
:line=>17,
:method=>"some_method",
:argc=>4,
0=>1111,
1=>nil,
2=>[1, 2, 3],
3=>#<Proc:0x007fc87c053290@test.rb:20>},
{:file=>"test.rb", :line=>20, :method=>"<main>", :argc=>0}]
#Original caller for comparison:
["test.rb:10:in `some_method2'",
"test.rb:21:in `block in <main>'",
"test.rb:17:in `some_method'",
"test.rb:20:in `<main>'"]Note that fetching parameters for CFUNCs with variable parameters (argc<0) is not supported.
Also instead of "<ruby>" :file can be nil, so does :method for unknown methods.
Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request