Capataz
Provides Ruby code execution control by defining rules for syntax and runtime behavior.
Installation
Add this line to your application's Gemfile:
gem 'capataz'And then execute:
$ bundle
Or install it yourself as:
$ gem install capataz
Usage
Take for example the following Ruby code:
class A
attr_reader :value, :secret_value
def initialize
@value = rand(10)
@secret_value = rand(value)
end
end
class B < A; endSo you can configure your code syntax and runtime rules
Capataz.config do
deny_declarations_of :module, :class
deny_invoke_of :constantize
allowed_constants A
deny_for A, :secret_value
maximum_iterations 100
maximum_invocations_of '+': 5
endAnd then you can control your Ruby code execution by evaluating it with Capataz
Capataz.eval <<-RUBY
class C
end
RUBY #ERROR: can not define classes
Capataz.eval <<-RUBY
B.new
RUBY #ERROR: Illegal access to constant B
Capataz.eval <<-RUBY
'B'.constantize.new
RUBY #ERROR: invoking method constantize is not allowed
Capataz.eval <<-RUBY
A.new.value
RUBY # 5 (a random value)
Capataz.eval <<-RUBY
A.new.secret_value
RUBY #ERROR: undefined method secret_value for #<A:0x000000022e7960>
Capataz.eval <<-RUBY
s = 0
100.times { s += 1 }
s
RUBY # 100
Capataz.eval <<-RUBY
s = 0
101.times { s += 1 }
s
RUBY #ERROR: Maximum allowed iterations exceeded (101)
Capataz.eval <<-RUBY
s = 0
10.times { 10.times { s += 1 } }
s
RUBY # 100
Capataz.eval <<-RUBY
s = 0
11.times { 10.times { s += 1 } }
s
RUBY #ERROR: Maximum allowed iterations exceeded (101)
Capataz.eval <<-RUBY
s = 0
5.times { s = s + 1 }
s
RUBY # 5
Capataz.eval <<-RUBY
s = 0
6.times { s = s + 1 }
s
RUBY #ERROR: Maximum allowed invocations for '+' exceeded (6)
Capataz.eval <<-RUBY
[1,2,3,4,5,6].inject(&:+)
RUBY # 21 (the + operator is invoked 5 times to summ 6 numbers)
Capataz.eval <<-RUBY
[1,2,3,4,5,6,7].inject(&:+)
RUBY #ERROR: Maximum allowed invocations for '+' exceeded (6)
Development
After checking out the repo, run bin/setup to install dependencies. Then, run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release to create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Contributing
- Fork it ( https://github.com/macarci/capataz/fork )
- 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 a new Pull Request