Class: Gem::Comparator::GemfileComparator

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

Overview

Gem::Comparator::GemfileComparator can compare dependencies between gem's Gemfiles based on the given Gem::Package objects

To compare Gemfiles it needs to extract gem packages to options

Instance Method Summary collapse

Constructor Details

#initialize ⇒ GemfileComparator

Returns a new instance of GemfileComparator.



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# File 'lib/rubygems/comparator/gemfile_comparator.rb', line 16

def initialize
  expect(:packages)
end

Instance Method Details

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

Compare Gemfiles using gem's packages and write the changes to the report



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# File 'lib/rubygems/comparator/gemfile_comparator.rb', line 24

def compare(packages, report, options = {})
  info 'Checking Gemfiles for dependencies...'
  return report if options[:param] && options[:param] != 'gemfiles'

  @packages = packages
  all_same = true

  # Check Gemfiles from older versions to newer
  packages.each_with_index do |pkg, index|
    unpacked_gem_dirs[@packages[index].spec.version] = extract_gem(pkg, options[:output])
    next if index == 0

    prev_gemfile = File.join(unpacked_gem_dirs[@packages[index-1].spec.version], 'Gemfile')
    curr_gemfile = File.join(unpacked_gem_dirs[@packages[index].spec.version], 'Gemfile')

    vers = "#{@packages[index-1].spec.version}->#{@packages[index].spec.version}"
    report['gemfiles'][vers].set_header "#{Rainbow(packages[index-1].spec.version).cyan}->" +
                                        "#{Rainbow(packages[index].spec.version).cyan}:"

    added, deleted, updated = compare_gemfiles(prev_gemfile, curr_gemfile)

    report['gemfiles'][vers]['added'].section do
      set_header '* Added:'
      puts added.map { |x| "#{x.name} #{x.requirements_list} (#{x.type})" } unless added.empty?
    end
    report['gemfiles'][vers]['deleted'].section do
      set_header '* Deleted'
      puts deleted.map { |x| "#{x.name} #{x.requirements_list} (#{x.type})" } unless deleted.empty?
    end
    report['gemfiles'][vers]['updated'].section do
      set_header '* Updated'
      puts updated  unless updated.empty?
    end
    all_same = false if !added.empty? || !deleted.empty?
  end
  if all_same && options[:log_all]
    report['gemfiles'].set_header "#{same} Gemfiles:"
    gemfile = File.join(unpacked_gem_dirs[@packages[1].spec.version], 'Gemfile')
    if File.exist? gemfile
      deps = gemfile_deps(gemfile)
      deps = '[]' if deps.empty?
      report['gemfiles'] << deps
    else
      report['gemfiles'] << 'No Gemfiles'
    end
  elsif !all_same
    report['gemfiles'].set_header "#{different} Gemfile dependencies"
  end

  report
end