backup_hhd_repo

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

require 'grit'
require 'pry'

# ----------------------------------------
# config
git_path        = '/Volumes/disk1_pt1/git'
output_path     = '~/git/backup'
output_filename = 'update.txt'
# ----------------------------------------

# -- start --
raise "#{git_path}が接続されていません" unless File.exists? git_path

class GitHash < Hash# {{{
  def get_repo( path, match = '/*.git' )
    git_repo = {}
    path = File.expand_path path
    Dir::glob("#{path}#{match}") do |git_dir|
      grit = Grit::Repo.new(git_dir)
      dir_name = grit.path.match(/[^\/]+$/).to_s
      git_repo[dir_name] = grit
    end

    update git_repo
  end
end# }}}
def how_update(git_repo, local_repo)# {{{
  return :empty if git_repo.commit_count.zero?
  return :new   unless local_repo

  if local_repo.commit_count.zero? || git_repo.commit_count != local_repo.commit_count  then
    return :update
  else
    return :updated
  end
end# }}}

hd_repo    = GitHash.new.get_repo git_path
local_repo = GitHash.new.get_repo output_path

report = Hash.new{|h,k| h[k]= Array.new }
# 恐らくRubyのバグだけど、この書き方はだめ
# report.default = []
# こうしないとだめ。。
# report[hoge] = [] if report[hoge].nil?

# 非同期や複数スレッドは、HDDが遅くなるので行わない。
hd_repo.each do |name, hd_grit|# {{{
  do_action = how_update(hd_grit, local_repo[name])

  case do_action
  when :new
    system("git clone --bare #{hd_grit.path} #{output_path}/#{name}")

  when :update
    # update
    local_grit = local_repo[name]
    system("
           cd #{local_grit.path};
           git fetch origin
           git reset --soft FETCH_HEAD
           ")

  when :empty
  when :updated
    #
  end

  puts "#{name} -- #{do_action}"
  report[do_action] << name
end# }}}

# ファイルの生成
output_file = File.expand_path "#{output_path}/#{output_filename}"
File.open(output_file, "w").close() unless File.exists? output_file

File.open output_file, "a" do |file|# {{{
  def file.output str
    self.puts str
    p str
  end

  file.output ""
  file.output "----------------------------------------"
  file.output "last update is #{Time.new}"

  report.keys.each do |k|
    file.output ""
    file.output "- #{k}"

    report[k].each do |message|
      file.output message
    end
  end
end# }}}