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

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from FPM::Source

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

Constructor Details

This class inherits a constructor from FPM::Source

Class Method Details

.flags(opts, settings) ⇒ Object 



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# File 'lib/fpm/source/gem.rb', line 9

def self.flags(opts, settings)
  settings.source[:gem] = "gem"

  opts.on("--bin-path DIRECTORY",
          "The directory to install gem executables") do |path|
    settings.source[:bin_path] = path
  end
  opts.on("--package-prefix PREFIX",
          "Prefix for gem packages") do |package_prefix|
    settings.source[:package_prefix] = package_prefix
  end

  opts.on("--gem PATH_TO_GEM",
          "The path to the 'gem' tool (defaults to 'gem' and searches " \
          "your $PATH)") do |path|
    settings.source[:gem] = path
  end
end

Instance Method Details

#can_recurse_dependencies ⇒ Object

def get_source



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# File 'lib/fpm/source/gem.rb', line 40

def can_recurse_dependencies
  true
end

#download(gem_name, version = nil) ⇒ Object 



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# File 'lib/fpm/source/gem.rb', line 44

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 || 'latest'})"
  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 73

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

      if self[:settings][:package_prefix]
        self[:package_prefix] = self[:settings][:package_prefix]
      else
        self[:package_prefix] = "rubygem"
      end
      self[:name] = "#{self[:package_prefix]}#{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'

      # if the gemspec has extensions defined, then this should be a 'native' arch.
      if !spec.extensions.empty?
        self[:architecture] = "native"
      else
        self[:architecture] = "all"
      end

      # make sure we have a description
      descriptions = [ self[:description], self[:summary], "#{spec.name} - no description given" ]
      self[:description] = descriptions.detect { |d| !(d.nil? or d.strip.empty?) }

      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] << "#{self[:package_prefix]}#{self[:suffix]}-#{dep.name} #{req}"
        end
      end # runtime_dependencies
    end # ::Gem::Package
  end # File.open (the gem)
end

#get_source(params) ⇒ Object

def flags



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# File 'lib/fpm/source/gem.rb', line 28

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 128

def make_tarball!(tar_path, builddir)
  tmpdir = "#{tar_path}.dir"
  gem = @paths.first
  if self[:prefix]
    installdir = "#{tmpdir}/#{self[:prefix]}"
    # TODO(sissel): Overwriting @paths is bad mojo and confusing...
    # Maybe we shouldn't?
    @paths = [ self[:prefix] ]
  else
    installdir = File.join(tmpdir, ::Gem::dir)
    @paths = [ ::Gem::dir ]
  end

  ::FileUtils.mkdir_p(installdir)
  args = [self[:settings][:gem], "install", "--quiet", "--no-ri", "--no-rdoc",
     "--install-dir", installdir, "--ignore-dependencies", "-E"]
  if self[:settings][:bin_path]
    tmp_bin_path = File.join(tmpdir, self[:settings][:bin_path])
    args += ["--bindir", tmp_bin_path]
    @paths << self[:settings][:bin_path]
    FileUtils.mkdir_p(tmp_bin_path) # Fixes #27
  end

  args << gem
  safesystem(*args)

  # make paths relative  (/foo becomes ./foo)
  tar(tar_path, @paths.collect {|p| ".#{p}"}, tmpdir)
  FileUtils.rm_r(tmpdir)

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