project-inspector.rb

#!/usr/bin/env ruby
# coding: utf-8

def header(s)
  s = "⦿ #{s}"

  puts
  puts s
  puts '=' * s.size
end

def separator_row(maxs)
  print '| '
  lines = Array.new(maxs.size, '-')
  lines.each_with_index do |ele, index|
    print "#{ele * (maxs[index] + 4)} | "
  end
  puts
end

def table(a, header: nil, footer: nil)
  return if a.empty?

  a = [header] + a if header
  a = a + [footer] if footer

  maxs = a.inject(Array.new(a.first.size, 0)) do |mem, e|
    sizes = e.map(&:to_s).map(&:size)
    [mem, sizes].transpose.map(&:max)
  end

  a.each_with_index do |row, row_index|
    print '| '
    row.each_with_index do |ele, index|
      print "#{ele}#{' ' * (maxs[index] - ele.to_s.size)}     | "
    end
    puts

    separator_row(maxs) if header && row_index.zero?
    separator_row(maxs) if footer && row_index == a.size - 2
  end
end

##############################################################################
git_files = `git ls-files`.lines.map(&:strip)
git_commits = `git rev-list HEAD --count`.strip

##############################################################################
header 'First commit'
puts `git rev-list --pretty=email --max-parents=0 HEAD`

##############################################################################
git_log = `git shortlog -sne`
git_log = git_log
          .lines
          .map(&:strip)
          .map { |l| l.split("\t").reverse }
header "Contributors"
table git_log,
      header: ['Contributor', '# of commits'],
      footer: ["#{git_log.size} contributors", git_commits]

##############################################################################
extensions = Hash.new(0)
git_files.each do |f|
  ext = File.extname(f)
  extensions[ext] += 1
end
header 'Files'
table extensions.to_a.sort_by(&:last).reverse,
      header: ['Extension', 'Count'],
      footer: ["#{extensions.size} types", git_files.size]

##############################################################################
gemfiles = git_files.select { |f| f.end_with?('Gemfile') }
header "Found #{gemfiles.size} Gemfiles" unless gemfiles.empty?
gemfiles_stats = []
gemfiles.each do |gemfile|
  Dir.chdir(File.dirname(gemfile)) do
    bundle_show_output = `bundle show`
    bundle_show = bundle_show_output.lines
    if bundle_show_output.include?('Could not find')
      gemfiles_stats << [gemfile, 'Bundle install to get # of gems']
    else
      gemfiles_stats << [gemfile, "#{bundle_show.size - 1} Gems"]
    end
  end
end
table gemfiles_stats