Class: Gem::Comparator::FileListComparator

Inherits:
Base
  • Object
show all
Defined in:
lib/rubygems/comparator/file_list_comparator.rb

Overview

Gem::Comparator::FileListComparator can compare file lists from gem's specs based on the given Gem::Package objects

To compare the files it needs to extract gem packages to options

Instance Method Summary collapse

Constructor Details

#initialize(ignore_group_writable = true) ⇒ FileListComparator

Returns a new instance of FileListComparator.



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# File 'lib/rubygems/comparator/file_list_comparator.rb', line 18

def initialize(ignore_group_writable=true)
  expect(:packages)

  # We need diff
  begin
    IO.popen('diff --version')
  rescue Exception
    error('Calling `diff` command failed. Do you have it installed?')
  end

  @ignore_group_writable = ignore_group_writable
end

Instance Method Details

#compare(packages, report, options = {}) ⇒ Object

Compare file lists for gem's Gem::Package objects in packages and writes the changes to the report

If options is set, it compares only that file list



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# File 'lib/rubygems/comparator/file_list_comparator.rb', line 38

def compare(packages, report, options = {})
  info 'Checking file lists...'

  @packages = packages

  # Check file lists from older versions to newer
  filter_params(SPEC_FILES_PARAMS, options[:param]).each do |param|
    all_same = true

    packages.each_with_index do |pkg, index|
      unpacked_gem_dirs[packages[index].spec.version] = extract_gem(pkg, options[:output])
      next if index == 0

      # File lists as arrays
      previous = value_from_spec(param, packages[index-1].spec)
      current = value_from_spec(param, pkg.spec)
      next unless (previous && current)

      vers = "#{packages[index-1].spec.version}->#{packages[index].spec.version}"

      deleted = previous - current
      added = current - previous
      same = current - added

      if options[:brief]
        deleted, dirs_added = dir_changed(previous, current)
      end

      report[param].set_header "#{different} #{param}:"

      report[param][vers].section do
        set_header "#{Rainbow(packages[index-1].spec.version).cyan}->" +
                   "#{Rainbow(packages[index].spec.version).cyan}:"
        nest('deleted').section do
          set_header '* Deleted:'
          puts deleted unless deleted.empty?
        end

        nest('added').section do
          set_header '* Added:'
          puts dirs_added if options[:brief]
        end
      end
      # Add information about permissions, shebangs etc.
      report = check_added_files(param, vers, index, added, report, options[:brief], options[:diff])

      report[param][vers]['changed'].set_header '* Changed:'
      report = check_same_files(param, vers, index, same, report, options[:brief], options[:diff])
      same_files = report[param][vers]['changed'].messages.empty?
      all_same = false unless same_files

      if previous == current && same_files && !all_same
        report[param][vers] << "#{Rainbow(packages[index-1].spec.version).cyan}->" + \
                               "#{Rainbow(packages[index].spec.version).cyan}: No change"
      end

    end

    if all_same && options[:log_all]
      report[param].set_header "#{same} #{param}:"
      value = value_from_spec(param, @packages[0].spec)
      value = '[]' if value.empty?
      report[param] << value
    end
  end
  report
end