The SourceIndex object indexes all the gems available from a particular source (e.g. a list of gem directories, or a remote source). A SourceIndex maps a gem full name to a gem specification.

NOTE

The class used to be named Cache, but that became confusing when cached source fetchers where introduced. The constant Gem::Cache is an alias for this class to allow old YAMLized source index objects to load properly.

Methods
A
D
E
F
G
I
L
N
O
P
R
S
Included Modules
Attributes
[RW] spec_dirs

Directories to use to refresh this SourceIndex when calling refresh!

Class Public methods
from_gems_in(*spec_dirs)

Creates a new SourceIndex from the ruby format gem specifications in spec_dirs.

# File lib/rubygems/source_index.rb, line 66
def self.from_gems_in(*spec_dirs)
  new spec_dirs
end
from_installed_gems(*deprecated)

Factory method to construct a source index instance for a given path.

deprecated

If supplied, ::from_installed_gems will act just like from_gems_in. This argument is deprecated and is provided just for backwards compatibility, and should not generally be used.

return

SourceIndex instance

# File lib/rubygems/source_index.rb, line 45
def self.from_installed_gems(*deprecated)
  if deprecated.empty?
    from_gems_in(*installed_spec_directories)
  else
    warn "NOTE: from_installed_gems(arg) is deprecated. From #{caller.first}"
    from_gems_in(*deprecated) # HACK warn
  end
end
installed_spec_directories()

Returns a list of directories from Gem.path that contain specifications.

# File lib/rubygems/source_index.rb, line 57
def self.installed_spec_directories
  # TODO: move to Gem::Utils
  Gem.path.collect { |dir| File.join(dir, "specifications") }
end
load_specification(file_name)

Loads a ruby-format specification from file_nameand returns the loaded spec.

# File lib/rubygems/source_index.rb, line 74
def self.load_specification(file_name)
  Gem::Deprecate.skip_during do
    Gem::Specification.load Gem::Path.new(file_name)
  end
end
new(specs_or_dirs = [])

Constructs a source index instance from the provided specifications, which is a Hash of gem full names and Gem::Specifications.

# File lib/rubygems/source_index.rb, line 84
def initialize specs_or_dirs = []
  @gems = {}
  @spec_dirs = nil

  case specs_or_dirs
  when Hash then
    specs_or_dirs.each do |full_name, spec|
      add_spec spec
    end
  when Array, String then
    self.spec_dirs = Array(specs_or_dirs)
    refresh!
  else
    arg = specs_or_dirs.inspect
    warn "NOTE: SourceIndex.new(#{arg}) is deprecated; From #{caller.first}."
  end
end
Instance Public methods
add_spec(gem_spec, name = gem_spec.full_name)

Add a gem specification to the source index.

# File lib/rubygems/source_index.rb, line 186
def add_spec(gem_spec, name = gem_spec.full_name)
  # No idea why, but the Indexer wants to insert them using original_name
  # instead of full_name. So we make it an optional arg.
  @gems[name] = gem_spec
end
add_specs(*gem_specs)

Add gem specifications to the source index.

# File lib/rubygems/source_index.rb, line 195
def add_specs(*gem_specs)
  Gem::Deprecate.skip_during do
    gem_specs.each do |spec|
      add_spec spec
    end
  end
end
all_gems()
# File lib/rubygems/source_index.rb, line 102
def all_gems
  gems
end
dump()
# File lib/rubygems/source_index.rb, line 350
def dump
  Marshal.dump(self)
end
each()

Iterate over the specifications in the source index.

# File lib/rubygems/source_index.rb, line 213
def each(&block) # :yields: gem.full_name, gem
  @gems.each(&block)
end
find_name(gem_name, requirement = Gem::Requirement.default)

Find a gem by an exact match on the short name.

# File lib/rubygems/source_index.rb, line 251
def find_name(gem_name, requirement = Gem::Requirement.default)
  dep = Gem::Dependency.new gem_name, requirement

  Gem::Deprecate.skip_during do
    search dep
  end
end
gem_signature(gem_full_name)

The signature for the given gem specification.

# File lib/rubygems/source_index.rb, line 237
def gem_signature(gem_full_name)
  require 'digest'

  Digest::SHA256.new.hexdigest(@gems[gem_full_name].to_yaml).to_s
end
index_signature()

The signature for the source index. Changes in the signature indicate a change in the index.

# File lib/rubygems/source_index.rb, line 228
def index_signature
  require 'digest'

  Digest::SHA256.new.hexdigest(@gems.keys.sort.join(',')).to_s
end
latest_specs(include_prerelease=false)

Returns an Array specifications for the latest released versions of each gem in this index.

# File lib/rubygems/source_index.rb, line 138
def latest_specs(include_prerelease=false)
  result = Hash.new { |h,k| h[k] = [] }
  latest = {}

  sort.each do |_, spec|
    name = spec.name
    curr_ver = spec.version
    prev_ver = latest.key?(name) ? latest[name].version : nil

    next if !include_prerelease && curr_ver.prerelease?
    next unless prev_ver.nil? or curr_ver >= prev_ver or
                latest[name].platform != Gem::Platform::RUBY

    if prev_ver.nil? or
       (curr_ver > prev_ver and spec.platform == Gem::Platform::RUBY) then
      result[name].clear
      latest[name] = spec
    end

    if spec.platform != Gem::Platform::RUBY then
      result[name].delete_if do |result_spec|
        result_spec.platform == spec.platform
      end
    end

    result[name] << spec
  end

  result.values.flatten
end
length()
load_gems_in(*spec_dirs)

Reconstruct the source index from the specifications in spec_dirs.

# File lib/rubygems/source_index.rb, line 117
def load_gems_in(*spec_dirs)
  @gems.clear

  spec_dirs.reverse_each do |spec_dir|
    spec_files = Dir[File.join(spec_dir, "*.gemspec")]

    spec_files.each do |spec_file|
      gemspec = Gem::Deprecate.skip_during do
        Gem::Specification.load spec_file
      end
      add_spec gemspec if gemspec
    end
  end

  self
end
outdated()

Returns an Array of Gem::Specifications that are not up to date.

# File lib/rubygems/source_index.rb, line 328
def outdated
  outdateds = []

  latest_specs.each do |local|
    dependency = Gem::Dependency.new local.name, ">= #{local.version}"

    fetcher = Gem::SpecFetcher.fetcher
    remotes = fetcher.find_matching dependency
    remotes = remotes.map { |(_, version, _), _| version }

    latest = remotes.sort.last

    outdateds << local.name if latest and local.version < latest
  end

  outdateds
end
prerelease_gems()
# File lib/rubygems/source_index.rb, line 106
def prerelease_gems
  @gems.reject { |name, gem| !gem.version.prerelease? }
end
prerelease_specs()

An array including only the prerelease gemspecs

# File lib/rubygems/source_index.rb, line 172
def prerelease_specs
  prerelease_gems.values
end
refresh!()

Replaces the gems in the source index from specifications in the directories this source index was created from. Raises an exception if this source index wasn't created from a directory (via ::from_gems_in or ::from_installed_gems, or having #spec_dirs set).

# File lib/rubygems/source_index.rb, line 320
def refresh!
  raise 'source index not created from disk' if @spec_dirs.nil?
  load_gems_in(*@spec_dirs)
end
released_gems()
# File lib/rubygems/source_index.rb, line 110
def released_gems
  @gems.reject { |name, gem| gem.version.prerelease? }
end
released_specs()

An array including only the released gemspecs

# File lib/rubygems/source_index.rb, line 179
def released_specs
  released_gems.values
end
remove_spec(full_name)

Remove a gem specification named full_name.

# File lib/rubygems/source_index.rb, line 206
def remove_spec(full_name)
  @gems.delete full_name
end

Search for a gem by Gem::Dependency gem_pattern. If only_platformis true, only gems matching Gem::Platform.local will be returned. An Array of matching Gem::Specification objects is returned.

For backwards compatibility, a String or Regexp pattern may be passed as gem_pattern, and a Gem::Requirement for platform_only. This behavior is deprecated and will be removed.

# File lib/rubygems/source_index.rb, line 268
def search(gem_pattern, platform_or_requirement = false)
  requirement = nil
  only_platform = false # FIX: WTF is this?!?

  # TODO - Remove support and warning for legacy arguments after 2008/11
  unless Gem::Dependency === gem_pattern
    warn "#{Gem.location_of_caller.join ':'}:Warning: Gem::SourceIndex#search support for #{gem_pattern.class} patterns is deprecated, use #find_name"
  end

  case gem_pattern
  when Regexp then
    requirement = platform_or_requirement || Gem::Requirement.default
  when Gem::Dependency then
    only_platform = platform_or_requirement
    requirement = gem_pattern.requirement

    gem_pattern = if Regexp === gem_pattern.name then
                    gem_pattern.name
                  elsif gem_pattern.name.empty? then
                    //
                  else
                    /^#{Regexp.escape gem_pattern.name}$/
                  end
  else
    requirement = platform_or_requirement || Gem::Requirement.default
    gem_pattern = /#{gem_pattern}/
  end

  unless Gem::Requirement === requirement then
    requirement = Gem::Requirement.create requirement
  end

  specs = @gems.values.select do |spec|
    spec.name =~ gem_pattern and
      requirement.satisfied_by? spec.version
  end

  if only_platform then
    specs = specs.select do |spec|
      Gem::Platform.match spec.platform
    end
  end

  specs.sort_by { |s| s.sort_obj }
end
size()
Also aliased as: length
# File lib/rubygems/source_index.rb, line 243
def size
  @gems.size
end
specification(full_name)

The gem specification given a full gem spec name.

# File lib/rubygems/source_index.rb, line 220
def specification(full_name)
  @gems[full_name]
end