class Jeweler::Commands::Version::Base

def self.build_for(jeweler)
  command = new
  command.repo = jeweler.repo
  command.version_helper = jeweler.version_helper
  command.gemspec = jeweler.gemspec
  command.commit = jeweler.commit
  command.base_dir = jeweler.base_dir
  command
end

def base_dir_path
  Pathname.new(base_dir).realpath
end

def commit_version
  if self.repo
    self.repo.add(working_subdir.join(version_helper.path))
    self.repo.commit("Version bump to #{self.version_helper.to_s}")
  end
end

def run
  update_version
  self.version_helper.write
  self.gemspec.version = self.version_helper.to_s
  commit_version if self.repo && self.commit
end

def update_version
  raise "Subclasses should implement this"
end

def working_subdir
  return @working_subdir if @working_subdir
  cwd = base_dir_path
  @working_subdir = cwd.relative_path_from(Pathname.new(repo.dir.path))
  @working_subdir
end