Class: Dit

Inherits:
Object
  • Object
show all
Defined in:
lib/dit.rb

Overview

This is the class where all the dit work is done. The thor class is basically a very thin layer on top of this that just calls its methods directly. This is because the hooks are not running through the Thor object, but also referencing these methods.

Class Method Summary collapse

Class Method Details

.clean_home ⇒ Object 



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# File 'lib/dit.rb', line 165

def self.clean_home
  Dir.chdir(Dir.home) do
    existing_dotfiles = Dir.glob('.*')
    existing_dotfiles.each do |f|
      next if f == '.' || f == '..'
      if File.symlink?(f)
        f_abs = File.readlink(f)
        File.delete(f) unless File.exist?(f_abs)
      end
    end
  end
end

.detect_hook(hook) ⇒ Object 



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# File 'lib/dit.rb', line 99

def self.detect_hook(hook)
  return [false, false] unless File.exist?(hook)

  cannot_hook, append_to_hook = false

  if `cat #{hook}`.include?('./.git/hooks/dit')
    puts 'Dit hook already installed.'
    cannot_hook = true
  elsif `cat #{hook}`.include?('#!/usr/bin/env bash')
    puts "You have #{hook} hooks already that use bash, so we'll " +
      'append ourselves to the file.'
    append_to_hook = true
  else
    puts "You have #{hook} hooks that use some foreign language, " +
      "so we won't interfere, but we can't hook in there."
    cannot_hook = true
  end

  [append_to_hook, cannot_hook]
end

.exit_if_windows ⇒ Object 



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# File 'lib/dit.rb', line 28

def self.exit_if_windows
  if OS.windows?
    puts 'This is a windows system, and dit does not support windows.'
    puts 'See vulpino/dit issue #1 if you have a potential solution.'
    exit 1
  end
end

.hook ⇒ Object 



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# File 'lib/dit.rb', line 44

def self.hook
  Dir.chdir(File.join('.git', 'hooks')) do
    # The following check for the existence of post-commit or post-merge hooks
    # and will not interfere with them if they exist and do not use bash.
    append_to_post_commit, cannot_post_commit = detect_hook 'post-commit'
    append_to_post_merge, cannot_post_merge = detect_hook 'post-merge'

    write_hook('post-commit', append_to_post_commit) unless cannot_post_commit
    write_hook('post-merge', append_to_post_merge) unless cannot_post_merge

    make_dit
    make_ruby_enforcer

    # Make sure they're executable
    FileUtils.chmod '+x', %w(post-commit post-merge dit force-ruby)
  end
end

.init ⇒ Object 



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# File 'lib/dit.rb', line 13

def self.init
  exit_if_windows

  if Dir.exist?('.git')
    symlink_all if prompt_for_symlink_all
  else
    Git.init(Dir.getwd)
    puts "Initialized empty Git repository in #{File.join(Dir.getwd, '.git')}"
  end

  hook

  puts 'Dit was successfully hooked into .git/hooks.'
end

.make_dit ⇒ Object 



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# File 'lib/dit.rb', line 127

def self.make_dit
  File.open('dit', 'a') do |f|
    f.write "#!/usr/bin/env ./.git/hooks/force-ruby\n"
    f.write "require 'dit'\n"
    f.write "Dit.symlink_unlinked\n"
  end
end

.make_ruby_enforcer ⇒ Object 



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# File 'lib/dit.rb', line 135

def self.make_ruby_enforcer
  # The following lines are because git hooks do this weird thing
  # where they prepend /usr/bin to the path and a bunch of other stuff
  # meaning git hooks will use /usr/bin/ruby instead of any ruby
  # from rbenv or rvm or chruby, so we make a script forcing the hook
  # to use our ruby
  ruby_path = `which ruby`
  if ruby_path != '/usr/bin/ruby'
    ruby_folder = File.dirname(ruby_path)
    File.open('force-ruby', 'a') do |f|
      f.write "#!/usr/bin/env bash\n"
      f.write "set -e\n"
      if ENV['RBENV_ROOT']
        # Use Rbenv's shims instead of directly going to ruby bin
        # By the way, if anyone has particular PATHs I should use for
        # RVM or chruby, please let me know!
        f.write "PATH=#{File.join(ENV['RBENV_ROOT'], 'shims')}:$PATH\n"
      else
        f.write "PATH=#{ruby_folder}:$PATH\n"
      end
      f.write "exec ruby \"$@\"\n"
    end
  else
    File.open('force-ruby', 'a') do |f|
      f.write "#!/usr/bin/env bash\n"
      f.write "exec ruby \"$@\"\n"
    end
  end
end

.prompt_for_symlink_all ⇒ Object 



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# File 'lib/dit.rb', line 36

def self.prompt_for_symlink_all
  puts 'Dit has detected an existing git repo, and will initialize it to ' +
    'populate your ~ directory with symlinks.'
  puts 'Please confirm this by typing y, or anything else to cancel.'
  response = STDIN.gets.chomp.upcase
  response == 'Y'
end

.symlink(a, b) ⇒ Object 



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# File 'lib/dit.rb', line 87

def self.symlink(a, b)
  if File.exist?(b)
    return if (File.symlink?(b) && File.readlink(b).include(Dir.getwd))
    puts "#{b} conflicts with #{a}. Remove #{b}? [yN]"
    response = STDIN.gets.upcase
    return unless response == 'Y'
  end
  File.symlink(a, b)
rescue
  puts "Failed to symlink #{a} to #{b}"
end

.symlink_all ⇒ Object 



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# File 'lib/dit.rb', line 82

def self.symlink_all
  current_branch = `git rev-parse --abbrev-ref HEAD`.chomp
  symlink_list `git ls-tree -r #{current_branch} --name-only`.split("\n")
end

.symlink_list(list) ⇒ Object 



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# File 'lib/dit.rb', line 62

def self.symlink_list(list)
  root_list = Set[]
  list.each do |f|
    f.strip!
    root = f.split('/')[0]
    root ||= f
    root_list = root_list | Set[root]
  end
  root_list.delete?('')
  root_list.each do |f|
    wd_f = File.absolute_path f
    home_f = File.absolute_path(f).gsub(Dir.getwd, Dir.home)
    symlink wd_f, home_f
  end
end

.symlink_unlinked ⇒ Object 



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# File 'lib/dit.rb', line 78

def self.symlink_unlinked
  symlink_list `git show --pretty="format:" --name-only HEAD`.split("\n")
end

.version ⇒ Object 



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# File 'lib/dit.rb', line 178

def self.version
  '0.3'
end

.write_hook(hook_file, do_append) ⇒ Object 



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# File 'lib/dit.rb', line 120

def self.write_hook(hook_file, do_append)
  File.open(hook_file, 'a') do |f|
    f.write "#!/usr/bin/env bash\n" unless do_append
    f.write "( exec ./.git/hooks/dit )\n"
  end
end