Class: FPM::Source::Gem

Inherits:
FPM::Source show all
Defined in:
lib/fpm/source/gem.rb

Instance Attribute Summary

Attributes inherited from FPM::Source

#paths, #root

Instance Method Summary collapse

Methods inherited from FPM::Source

#[], #[]=, #dependencies, #initialize, #metadata, #package

Constructor Details

This class inherits a constructor from FPM::Source

Instance Method Details

#can_recurse_dependencies ⇒ Object

def get_source



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# File 'lib/fpm/source/gem.rb', line 20

def can_recurse_dependencies
  true
end

#download(gem_name, version = nil) ⇒ Object 



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# File 'lib/fpm/source/gem.rb', line 24

def download(gem_name, version=nil)
  # This code mostly mutated from rubygem's fetch_command.rb
  # Code use permissible by rubygems's "GPL or these conditions below"
  # http://rubygems.rubyforge.org/rubygems-update/LICENSE_txt.html

  puts "Trying to download #{gem_name} (version=#{version})"
  dep = ::Gem::Dependency.new gem_name, version
  # How to handle prerelease? Some extra magic options?
  #dep.prerelease = options[:prerelease]
  
  if ::Gem::SpecFetcher.fetcher.respond_to?(:fetch_with_errors)
    specs_and_sources, errors =
      ::Gem::SpecFetcher.fetcher.fetch_with_errors(dep, true, true, false)
  else
    specs_and_sources = 
      ::Gem::SpecFetcher.fetcher.fetch(dep, true)
    errors = "???"
  end
  spec, source_uri = specs_and_sources.sort_by { |s,| s.version }.last

  if spec.nil? then
    raise "Invalid gem? Name: #{gem_name}, Version: #{version}, Errors: #{errors}"
  end

  path = ::Gem::RemoteFetcher.fetcher.download spec, source_uri
  FileUtils.mv path, spec.file_name
  @paths = [spec.file_name]
end

#get_metadata ⇒ Object 



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# File 'lib/fpm/source/gem.rb', line 53

def get_metadata
  File.open(@paths.first, 'r') do |f|
    ::Gem::Package.open(f, 'r') do |gem|
      spec = gem.metadata
      %w(
        description
        license
        summary
        version
      ).each do |field|
        self[field.to_sym] = spec.send(field) rescue "unknown"
      end

      self[:name] = "rubygem#{self[:suffix]}-#{spec.name}"
      self[:maintainer] = spec.author
      self[:url] = spec.homepage

      # TODO [Jay]: this will be different for different
      # package managers.  Need to decide how to handle this.
      self[:category] = 'Languages/Development/Ruby'

      self[:dependencies] = []
      spec.runtime_dependencies.map do |dep|
        # rubygems 1.3.5 doesn't have 'Gem::Dependency#requirement'
        if dep.respond_to?(:requirement)
          reqs = dep.requirement.to_s.gsub(/,/, '')
        else
          reqs = dep.version_requirements
        end

        # Some reqs can be ">= a, < b" versions, let's handle that.
        reqs.to_s.split(/, */).each do |req|
          self[:dependencies] << "rubygem#{self[:suffix]}-#{dep.name} #{req}"
        end
      end # runtime_dependencies
    end # ::Gem::Package
  end # File.open (the gem)
end

#get_source(params) ⇒ Object 



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# File 'lib/fpm/source/gem.rb', line 8

def get_source(params)
  gem = @paths.first
  looks_like_name_re = /^[A-Za-z0-9_-]+$/
  if !File.exists?(gem) 
    if gem =~ looks_like_name_re
      download(gem, params[:version])
    else
      raise "Path '#{gem}' is not a file and does not appear to be the name of a rubygem."
    end
  end
end

#make_tarball!(tar_path, builddir) ⇒ Object

def get_metadata



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# File 'lib/fpm/source/gem.rb', line 92

def make_tarball!(tar_path, builddir)
  tmpdir = "#{tar_path}.dir"
  installdir = "#{tmpdir}/#{::Gem::dir}"
  ::FileUtils.mkdir_p(installdir)
  args = ["gem", "install", "--quiet", "--no-ri", "--no-rdoc",
     "--install-dir", installdir, "--ignore-dependencies", @paths.first]
  system(*args)
  
  @paths = [ ::Gem::dir ]
  tar(tar_path, ".#{@paths.first}", tmpdir)
  FileUtils.rm_r(tmpdir)

  # TODO(sissel): Make a helper method.
  system(*["gzip", "-f", tar_path])
end