a little script to review feature-branches

git-review

#!/usr/bin/env ruby

# rubocop:disable Style/SpecialGlobalVars

begin
  require 'ruby-progressbar'
rescue LoadError
  system 'gem', 'install', 'ruby-progressbar'
  exec "#{$0} #{ARGV.join(' ')}"
end

def determine_current_branch
  branch = `git branch | grep '^*' | sed 's!\*\ !!'`.chomp

  if just_pulled? && branch == 'master'
    # format "branch" like base..HEAD
    `git reflog -1 --parents | cut -d ' ' -f 1,2`.chomp.split.reverse.join('..')
  elsif git_flow?
    prefix = `git config gitflow.prefix.feature | sed 's!\/!\\\/!'`.chomp

    branch.gsub(prefix, '')
  else
    branch
  end
end

def integration_branch
  @integration_branch ||=
    begin
      if git_flow?
        `git config gitflow.branch.develop`.chomp
      else
        'master'
      end
    end
end

def git_flow?
  @git_flow ||= begin
                  `git config --get gitflow.branch.develop`
                  $?.success?
                end
end

def just_pulled?
  `git reflog -1 | grep 'pull'`
  $?.success?
end

ENV['PAGER'] ||= "#{`which less`.chomp} -E"

feature = ARGV[0] || determine_current_branch
base = ARGV[1] || integration_branch

if feature =~ /(?<base>[0-9a-f]{5,8})\.{2}(?<branch>[0-9a-f]{5,8})/
  range_given  = true
  full_branch  = feature # used for message
  commit_range = feature

  matches      = $~
  feature      = matches[:branch]
  base         = matches[:base]
else
  range_given  = false
  full_branch  = git_flow? ? "feature/#{feature}" : feature
  commit_range = "#{base}..#{full_branch}"
end

puts "preparing to review #{full_branch}"

$stdout.sync = true
if git_flow? && !range_given && feature != determine_current_branch
  base_branch = base.gsub(/\.+$/, '')

  system('git', 'checkout', base_branch)
  system('git', 'pull', '--rebase')
  system('git', 'flow', 'feature', 'track', feature)
end

system('git', 'log', '--graph', '--oneline', '--decorate', commit_range)
puts

puts 'start review now?'
answer = STDIN.gets.chomp

commits = `git log --reverse --format=format:%H #{commit_range}`.split
commit_hash = 'commit 0000000000000000000000000000000000000000'
progressbar = ProgressBar.create(
  format: commit_hash + ' %a |%w>%i| %c/%C | %E ',
  total: commits.size,
  starting_at: 0
)

commits.each do |commit|
  system 'clear'
  progressbar.increment
  system 'git', 'show', '--patch-with-stat', commit
  answer = STDIN.gets.chomp
end

if git_flow? && !range_given && !just_pulled?
  puts 'clean up review?'
  answer = STDIN.gets.chomp

  system 'git', 'checkout', integration_branch
  system "git branch -d feature/#{feature}"
end

# rubocop:enable Style/SpecialGlobalVars