what-is-staged.rb

#!/usr/bin/env ruby
require 'getoptlong'
require 'tty/tree'

opts = GetoptLong.new(
  [ '--help', '-h', GetoptLong::NO_ARGUMENT ],
  [ '--brief', '-b', GetoptLong::NO_ARGUMENT ],
)

verbose = true

opts.each do |opt, arg|
  case opt
  when '--help'
    puts <<-EOF
INST_CRED=user:pass what-is-staged.rb [branch_name]

-h, --help:
   show help

--brief, -b:
   show only top-level branch names that are staged
    EOF
    exit
  when '--brief'
    verbose = false
  end
end

if verbose
  puts "\nfetching..."
  `git fetch`
  puts "\ncalculating..."
else
  `git fetch >/dev/null 2>&1`
end

def unmerged_branches(branch)
  `git branch -r --no-merged origin/#{branch}`.split("\n").map(&:strip).map{|m| m.gsub('origin/','')}
end

def staged_by(branch)
  @contained[branch] ||= begin
    unstaged_branches = unmerged_branches(branch)
    staged = @all_unmerged_branches - unstaged_branches - [branch]
    contained_branches = []
    staged.map do |staged_branch|
      contained_branches += staged_by(staged_branch)
    end
    staged - contained_branches
  end
end

def tree_from(branch)
  { branch => @contained[branch].map{|n| tree_from(n) } }
end

staging_branch_name = ARGV[0] || "staging1_rc"
@contained = {}
@all_unmerged_branches = unmerged_branches("master")

staged = staged_by(staging_branch_name)

if verbose
  url = case staging_branch_name
    when "staging1_rc" then "https://app.staging1.mavenlink.net/version.txt"
    else "https://app.#{staging_branch_name.split("_rc").first}.mvn.link/version.txt"
  end

  version = `curl --user #{ENV["INST_CRED"]} #{url} 2>/dev/null`.strip
  commit = `git rev-parse origin/#{staging_branch_name}`.strip
  puts "#{staging_branch_name} is now on commit #{commit}"
  puts "version on #{url} is #{version}"
  puts
  data = tree_from(staging_branch_name)
  tree = TTY::Tree.new(data)
  puts tree.render
  exit version == commit
else
  puts "#{staged.join("\n")}"
end