Module: Gemika::Env

Extended by:
Env
Included in:
Env
Defined in:
lib/gemika/env.rb

Overview

Version switches to write code that works with different versions of Ruby and gem dependencies.

Constant Summary collapse

VERSION_PATTERN = 
/(?:\d+\.)*\d+/

Instance Method Summary collapse

Instance Method Details

#gem?(*args) ⇒ Boolean

Check if the given gem was activated by the current gemfile. It might or might not have been required yet.

Examples:

Gemika::Env.gem?('activerecord')
Gemika::Env.gem?('activerecord', '= 5.0.0')
Gemika::Env.gem?('activerecord', '~> 4.2.0')

Returns:

  • (Boolean) 


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# File 'lib/gemika/env.rb', line 56

def gem?(*args)
  options = args.last.is_a?(Hash) ? args.pop : {}
  name, requirement_string = args
  if options[:gemfile] && !process_gemfile?(options[:gemfile])
    gem_in_gemfile?(options[:gemfile], name, requirement_string)
  else
    gem_activated?(name, requirement_string)
  end
end

#gemfile ⇒ Object

Returns the path to the gemfile for the current Ruby process.



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# File 'lib/gemika/env.rb', line 16

def gemfile
  if @gemfile_changed
    @process_gemfile
  else
    ENV['BUNDLE_GEMFILE']
  end
end

#ruby ⇒ Object

Returns the current version of Ruby.



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# File 'lib/gemika/env.rb', line 69

def ruby
  RUBY_VERSION
end

#ruby?(requirement) ⇒ Boolean

Check if the current version of Ruby satisfies the given requirements.

Examples:

Gemika::Env.ruby?('>= 2.1.0')

Returns:

  • (Boolean) 


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# File 'lib/gemika/env.rb', line 79

def ruby?(requirement)
  requirement_satisfied?(requirement, ruby)
end

#travis? ⇒ Boolean

Returns whether this process is running within a TravisCI build.

Returns:

  • (Boolean) 


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# File 'lib/gemika/env.rb', line 86

def travis?
  !!ENV['TRAVIS']
end

#with_gemfile(path, *args, &block) ⇒ Object

Changes the gemfile to the given path, runs the given block, then resets the gemfile to its original path.

Examples:

Gemika::Env.with_gemfile('gemfiles/Gemfile.rails3') do
  system('rspec spec') or raise 'RSpec failed'
end


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# File 'lib/gemika/env.rb', line 33

def with_gemfile(path, *args, &block)
  # Make sure that if block calls  #gemfile we still return the gemfile for this
  # process, regardless of what's in ENV temporarily
  @gemfile_changed = true
  @process_gemfile = ENV['BUNDLE_GEMFILE']
  Bundler.with_clean_env do
    ENV['BUNDLE_GEMFILE'] = path
    block.call(*args)
  end
ensure
  @gemfile_changed = false
  ENV['BUNDLE_GEMFILE'] = @process_gemfile
end