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Edit File : gem_path_searcher.rb \| Size : 4.57 KB
require "rubygems" require "rubygems/deprecate" ## # GemPathSearcher has the capability to find loadable files inside # gems. It generates data up front to speed up searches later. class Gem::GemPathSearcher ## # Initialise the data we need to make searches later. def initialize # We want a record of all the installed gemspecs, in the order we wish to # examine them. # TODO: remove this stupid method @gemspecs = init_gemspecs # Map gem spec to glob of full require_path directories. Preparing this # information may speed up searches later. @lib_dirs = {} @gemspecs.each do \|spec\| @lib_dirs[spec.object_id] = lib_dirs_for spec end end ## # Look in all the installed gems until a matching +glob+ is found. # Return the _gemspec_ of the gem where it was found. If no match # is found, return nil. # # The gems are searched in alphabetical order, and in reverse # version order. # # For example: # # find('log4r') # -> (log4r-1.1 spec) # find('log4r.rb') # -> (log4r-1.1 spec) # find('rake/rdoctask') # -> (rake-0.4.12 spec) # find('foobarbaz') # -> nil # # Matching paths can have various suffixes ('.rb', '.so', and # others), which may or may not already be attached to _file_. # This method doesn't care about the full filename that matches; # only that there is a match. def find(glob) # HACK violation of encapsulation @gemspecs.find do \|spec\| # TODO: inverted responsibility matching_file? spec, glob end end # Looks through the available gemspecs and finds the first # one that contains +file+ as a requirable file. def find_spec_for_file(file) @gemspecs.find do \|spec\| return spec if spec.contains_requirable_file?(file) end end def find_active(glob) # HACK violation of encapsulation @gemspecs.find do \|spec\| # TODO: inverted responsibility spec.loaded? and matching_file? spec, glob end end ## # Works like #find, but finds all gemspecs matching +glob+. def find_all(glob) # HACK violation of encapsulation @gemspecs.select do \|spec\| # TODO: inverted responsibility matching_file? spec, glob end \|\| [] end def find_in_unresolved(glob) # HACK violation specs = Gem.unresolved_deps.values.map { \|dep\| Gem.source_index.search dep, true }.flatten specs.select do \|spec\| # TODO: inverted responsibility matching_file? spec, glob end \|\| [] end def find_in_unresolved_tree glob # HACK violation # TODO: inverted responsibility specs = Gem.unresolved_deps.values.map { \|dep\| Gem.source_index.search dep, true }.flatten specs.reverse_each do \|spec\| trails = matching_paths(spec, glob) next if trails.empty? return trails.map(&:reverse).sort.first.reverse end [] end ## # Attempts to find a matching path using the require_paths of the given # +spec+. def matching_file?(spec, path) not matching_files(spec, path).empty? end def matching_paths(spec, path) trails = [] spec.traverse do \|from_spec, dep, to_spec, trail\| next unless to_spec.conflicts.empty? trails << trail unless matching_files(to_spec, path).empty? end trails end ## # Returns files matching +path+ in +spec+. #-- # Some of the intermediate results are cached in @lib_dirs for speed. def matching_files(spec, path) return [] unless @lib_dirs[spec.object_id] # case no paths glob = File.join @lib_dirs[spec.object_id], "#{path}#{Gem.suffix_pattern}" Dir[glob].select { \|f\| File.file? f.untaint } end ## # Return a list of all installed gemspecs, sorted by alphabetical order and # in reverse version order. (bar-2, bar-1, foo-2) def init_gemspecs Gem::Specification.sort { \|a, b\| names = a.name <=> b.name next names if names.nonzero? b.version <=> a.version } end ## # Returns library directories glob for a gemspec. For example, # '/usr/local/lib/ruby/gems/1.8/gems/foobar-1.0/{lib,ext}' def lib_dirs_for(spec) "#{spec.full_gem_path}/{#{spec.require_paths.join(',')}}" if spec.require_paths end extend Gem::Deprecate deprecate :initialize, :none, 2011, 10 deprecate :find, :none, 2011, 10 deprecate :find_active, :none, 2011, 10 deprecate :find_all, :none, 2011, 10 deprecate :find_in_unresolved, :none, 2011, 10 deprecate :find_in_unresolved_tree, :none, 2011, 10 deprecate :find_spec_for_file, :none, 2011, 10 end Back

Edit File : gem_path_searcher.rb | Size : 4.57 KB

require "rubygems"
require "rubygems/deprecate"

##
# GemPathSearcher has the capability to find loadable files inside
# gems.  It generates data up front to speed up searches later.

class Gem::GemPathSearcher

##
  # Initialise the data we need to make searches later.

def initialize
    # We want a record of all the installed gemspecs, in the order we wish to
    # examine them.
    # TODO: remove this stupid method
    @gemspecs = init_gemspecs

# Map gem spec to glob of full require_path directories.  Preparing this
    # information may speed up searches later.
    @lib_dirs = {}

@gemspecs.each do |spec|
      @lib_dirs[spec.object_id] = lib_dirs_for spec
    end
  end

##
  # Look in all the installed gems until a matching +glob+ is found.
  # Return the _gemspec_ of the gem where it was found.  If no match
  # is found, return nil.
  #
  # The gems are searched in alphabetical order, and in reverse
  # version order.
  #
  # For example:
  #
  #   find('log4r')              # -> (log4r-1.1 spec)
  #   find('log4r.rb')           # -> (log4r-1.1 spec)
  #   find('rake/rdoctask')      # -> (rake-0.4.12 spec)
  #   find('foobarbaz')          # -> nil
  #
  # Matching paths can have various suffixes ('.rb', '.so', and
  # others), which may or may not already be attached to _file_.
  # This method doesn't care about the full filename that matches;
  # only that there is a match.

def find(glob)
    # HACK violation of encapsulation
    @gemspecs.find do |spec|
      # TODO: inverted responsibility
      matching_file? spec, glob
    end
  end

# Looks through the available gemspecs and finds the first
  # one that contains +file+ as a requirable file.

def find_spec_for_file(file)
    @gemspecs.find do |spec|
      return spec if spec.contains_requirable_file?(file)
    end
  end

def find_active(glob)
    # HACK violation of encapsulation
    @gemspecs.find do |spec|
      # TODO: inverted responsibility
      spec.loaded? and matching_file? spec, glob
    end
  end

##
  # Works like #find, but finds all gemspecs matching +glob+.

def find_all(glob)
    # HACK violation of encapsulation
    @gemspecs.select do |spec|
      # TODO: inverted responsibility
      matching_file? spec, glob
    end || []
  end

def find_in_unresolved(glob)
    # HACK violation
    specs = Gem.unresolved_deps.values.map { |dep|
      Gem.source_index.search dep, true
    }.flatten

specs.select do |spec|
      # TODO: inverted responsibility
      matching_file? spec, glob
    end || []
  end

def find_in_unresolved_tree glob
    # HACK violation
    # TODO: inverted responsibility
    specs = Gem.unresolved_deps.values.map { |dep|
      Gem.source_index.search dep, true
    }.flatten

specs.reverse_each do |spec|
      trails = matching_paths(spec, glob)
      next if trails.empty?
      return trails.map(&:reverse).sort.first.reverse
    end

[]
  end

##
  # Attempts to find a matching path using the require_paths of the given
  # +spec+.

def matching_file?(spec, path)
    not matching_files(spec, path).empty?
  end

def matching_paths(spec, path)
    trails = []

spec.traverse do |from_spec, dep, to_spec, trail|
      next unless to_spec.conflicts.empty?
      trails << trail unless matching_files(to_spec, path).empty?
    end

trails
  end

##
  # Returns files matching +path+ in +spec+.
  #--
  # Some of the intermediate results are cached in @lib_dirs for speed.

def matching_files(spec, path)
    return [] unless @lib_dirs[spec.object_id] # case no paths
    glob = File.join @lib_dirs[spec.object_id], "#{path}#{Gem.suffix_pattern}"
    Dir[glob].select { |f| File.file? f.untaint }
  end

##
  # Return a list of all installed gemspecs, sorted by alphabetical order and
  # in reverse version order.  (bar-2, bar-1, foo-2)

def init_gemspecs
    Gem::Specification.sort { |a, b|
      names = a.name <=> b.name
      next names if names.nonzero?
      b.version <=> a.version
    }
  end

##
  # Returns library directories glob for a gemspec.  For example,
  #   '/usr/local/lib/ruby/gems/1.8/gems/foobar-1.0/{lib,ext}'

def lib_dirs_for(spec)
    "#{spec.full_gem_path}/{#{spec.require_paths.join(',')}}" if
      spec.require_paths
  end

extend Gem::Deprecate

deprecate :initialize,              :none,  2011, 10
  deprecate :find,                    :none,  2011, 10
  deprecate :find_active,             :none,  2011, 10
  deprecate :find_all,                :none,  2011, 10
  deprecate :find_in_unresolved,      :none,  2011, 10
  deprecate :find_in_unresolved_tree, :none,  2011, 10
  deprecate :find_spec_for_file,      :none,  2011, 10
end

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