Class: Dit

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

Class Method Summary collapse

Class Method Details

.detect_existing_hook(hook) ⇒ Object 



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# File 'lib/dit.rb', line 79

def self.detect_existing_hook(hook)
  hook_exists = File.exist?(hook)

  cannot_hook, append_to_hook = false

  if hook_exists
    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
  end

  [append_to_hook, cannot_hook]
end

.hook ⇒ Object 



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# File 'lib/dit.rb', line 33

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 = hook 'post-commit'
    append_to_post_merge, cannot_post_merge = hook 'post-merge'

    add_hook('post-commit', append_to_post_commit) unless cannot_post_commit
    add_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

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.



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# File 'lib/dit.rb', line 11

def self.init
  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.'
    return
  end

  if Dir.exist?('.git')
    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
    return unless (response == 'Y')
    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 109

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 117

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

.repo ⇒ Object 



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# File 'lib/dit.rb', line 69

def self.repo
  Git.open(Dir.getwd)
end

.symlink(a, b) ⇒ Object 



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# File 'lib/dit.rb', line 73

def self.symlink(a, b)
  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 64

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 51

def self.symlink_list(list)
  list.each do |f|
    f.strip!
    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 60

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

.write_hook(hook_file, do_append) ⇒ Object 



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# File 'lib/dit.rb', line 102

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