class Vendorer

# File lib/vendorer.rb, line 6
def initialize(options={})
  @options = options
  @sub_path = []
end

# File lib/vendorer.rb, line 15
def file(path, url=nil)
  target_path = complete_path(path)
  update_or_not target_path do
    run "mkdir", "-p", File.dirname(target_path)
    if @copy_from_url
      copy_from_path(target_path, url || path)
    else
      run "curl", url, "--fail", "-L", "--compressed", "-o", target_path
      raise "Downloaded empty file" unless File.exist?(target_path)
    end
    yield target_path if block_given?
  end
end

# File lib/vendorer.rb, line 29
def folder(path, url=nil, options={})
  if @copy_from_path or url
    target_path = complete_path(path)
    update_or_not target_path do
      run "rm", "-rf", target_path
      run "mkdir", "-p", File.dirname(target_path)
      if @copy_from_path
        copy_from_path(target_path, url || path)
      else
        download_repository(url, target_path, options)
      end
      yield target_path if block_given?
    end
  else
    @sub_path << path
    yield
    @sub_path.pop
  end
end

# File lib/vendorer.rb, line 67
def from(url, options={})
  Dir.mktmpdir do |tmpdir|
    download_repository url, tmpdir, options
    @copy_from_url, @copy_from_path = url, tmpdir
    yield(@copy_from_path)
    @copy_from_url = @copy_from_path = nil
  end
end

# File lib/vendorer.rb, line 56
def init
  separator = "<!-- extracted by vendorer init -->"
  readme = File.read(File.expand_path('../../Readme.md', __FILE__))
  examples = readme.split(separator)[1]
  examples.gsub!(/```.*/,'') # remove ``` from readme
  examples = examples.split("\n").map do |l|
    (l.start_with? '#' or l.empty?) ? l : "# #{l}"
  end.join("\n")
  File.open('Vendorfile', 'w') { |f| f.write(examples.strip) }
end

# File lib/vendorer.rb, line 11
def parse(content)
  eval(content, nil, 'Vendorfile', 1)
end

# File lib/vendorer.rb, line 49
def rewrite(path)
  content = File.read(path)
  result = yield content
  File.open(path,'w'){|f| f.write(result) }
end

# File lib/vendorer.rb, line 95
def complete_path(path)
  File.join(@sub_path + [path])
end

# File lib/vendorer.rb, line 108
def copy_from_path(dest_path, src_path)
  src_path ||= dest_path
  copy_from = File.join(@copy_from_path, src_path)
  raise "'#{src_path}' not found in #{@copy_from_url}" unless File.exist?(copy_from)
  run "cp", "-Rp", copy_from, dest_path
end

# File lib/vendorer.rb, line 99
def download_repository(url, to, options)
  run "git", "clone", url, to
  if commit = (options[:ref] || options[:tag] || options[:branch])
    run "git", "checkout", commit, dir: to
  end
  run "git", "submodule", "update", "--init", "--recursive", dir: to
  run "rm", "-rf", ".git", dir: to
end

# File lib/vendorer.rb, line 88
def run(*cmd, dir: nil)
  cmd = "#{cmd.shelljoin} 2>&1"
  cmd = ["cd", dir].shelljoin + " && #{cmd}" if dir
  output = `#{cmd}`
  raise "Failed: #{cmd}\n#{output}" unless $?.success?
end

# File lib/vendorer.rb, line 78
def update_or_not(path)
  update_requested = (@options[:update] and (@options[:update] == true or path.start_with?(@options[:update]+'/') or path == @options[:update]))
  if update_requested or not File.exist?(path)
    puts "updating #{path}"
    yield
  else
    puts "keeping #{path}"
  end
end