Class: CapsuleCD::Ruby::RubyHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/capsulecd/ruby/ruby_helper.rb

Class Method Summary collapse

Class Method Details

.execute_in_child ⇒ Object

since the Gem::Specification class is basically eval’ing the gemspec file, and the gemspec file is doing a require to load the version.rb file, the version.rb file is cached in memory. We’re going to try to get around that issue by parsing the gemspec file in a forked process. stackoverflow.com/questions/1076257/returning-data-from-forked-processes



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# File 'lib/capsulecd/ruby/ruby_helper.rb', line 37

def self.execute_in_child
  read, write = IO.pipe

  pid = fork do
    read.close
    result = yield
    Marshal.dump(result, write)
    exit!(0) # skips exit handlers.
  end

  write.close
  result = read.read
  Process.wait(pid)
  raise "child failed" if result.empty?
  Marshal.load(result)
end

.get_gemspec_data(repo_path) ⇒ Object 



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# File 'lib/capsulecd/ruby/ruby_helper.rb', line 26

def self.get_gemspec_data(repo_path)
  self.load_gemspec_data(self.get_gemspec_path(repo_path))
end

.get_gemspec_path(repo_path) ⇒ Object 



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# File 'lib/capsulecd/ruby/ruby_helper.rb', line 18

def self.get_gemspec_path(repo_path)
  gemspecs = Dir.glob(repo_path + '/*.gemspec')
  if gemspecs.empty?
    fail CapsuleCD::Error::BuildPackageInvalid, '*.gemspec file is required to process Ruby gem'
  end
  gemspecs.first
end

.load_gemspec_data(gemspec_path) ⇒ Object 



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# File 'lib/capsulecd/ruby/ruby_helper.rb', line 54

def self.load_gemspec_data(gemspec_path)
  gemspec_data = nil
  Bundler.with_clean_env do
    gemspec_data = self.execute_in_child do
      Gem::Specification::load(gemspec_path)
    end
  end
  if !gemspec_data
    fail CapsuleCD::Error::BuildPackageInvalid, '*.gemspec could not be parsed.'
  end
  return gemspec_data
end

.read_version_file(repo_path, gem_name, version_filename = 'version.rb') ⇒ Object 



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# File 'lib/capsulecd/ruby/ruby_helper.rb', line 10

def self.read_version_file(repo_path, gem_name, version_filename = 'version.rb')
  File.read(self.version_filepath(repo_path, gem_name, version_filename))
end

.version_filepath(repo_path, gem_name, version_filename = 'version.rb') ⇒ Object 



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# File 'lib/capsulecd/ruby/ruby_helper.rb', line 6

def self.version_filepath(repo_path, gem_name, version_filename = 'version.rb')
  "#{repo_path}/lib/#{gem_name}/#{version_filename}"
end

.write_version_file(repo_path, gem_name, metadata_str, version_filename = 'version.rb') ⇒ Object 



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# File 'lib/capsulecd/ruby/ruby_helper.rb', line 14

def self.write_version_file(repo_path, gem_name, metadata_str, version_filename = 'version.rb')
  File.open(self.version_filepath(repo_path, gem_name, version_filename), 'w') { |file| file.write(metadata_str) }
end