twbs--bootstrap-sass/tasks/converter/network.rb

class Converter
  module Network

    def bootstrap_font_files
      @bootstrap_font_files ||= get_paths_by_type('fonts', /\.(eot|svg|ttf|woff)$/)
    end

    def bootstrap_less_files
      @bootstrap_less_files ||= get_paths_by_type('less', /\.less$/)
    end

    def bootstrap_js_files
      @bootstrap_js_files ||= begin
        files = get_paths_by_type 'js', /\.js$/
        files.sort_by { |f|
          case f
            # tooltip depends on popover and must be loaded earlier
            when /tooltip/ then
              1
            when /popover/ then
              2
            else
              0
          end
        }
      end
    end

    protected

    def get_paths_by_type(dir, file_re)
      files = get_json "#{@git_data_api_host}/#@repo/git/trees/#{get_tree_sha(dir)}"
      files['tree'].select { |f| f['type'] == 'blob' && f['path'] =~ file_re }.map { |f| f['path'] }
    end

    def read_files(path, files)
      full_path = "#{@git_raw_host}/#@repo/#@branch_sha/#{path}"
      if (contents = read_cached_files(path, files))
        log_http_get_files files, full_path, true
      else
        log_http_get_files files, full_path, false
        contents = {}
        files.map do |name|
          Thread.start {
            content = open("#{full_path}/#{name}").read
            Thread.exclusive { contents[name] = content }
          }
        end.each(&:join)
        write_cached_files path, contents
      end
      contents
    end

    def read_cached_files(path, files)
      full_path = "#@cache_path/#@branch_sha/#{path}"
      contents  = {}
      if File.directory?(full_path)
        files.each do |name|
          contents[name] = File.read("#{full_path}/#{name}", mode: 'rb') || ''
        end
        contents
      end
    end

    def write_cached_files(path, files)
      full_path = "./#@cache_path/#@branch_sha/#{path}"
      FileUtils.mkdir_p full_path
      files.each do |name, content|
        File.open("#{full_path}/#{name}", 'wb') { |f| f.write content }
      end
    end


    def get_file(url)
      cache_path = "./#@cache_path#{URI(url).path}"
      FileUtils.mkdir_p File.dirname(cache_path)
      if File.exists?(cache_path)
        log_http_get_file url, true
        File.read(cache_path, mode: 'rb')
      else
        log_http_get_file url, false
        content = open(url).read
        File.open(cache_path, 'wb') { |f| f.write content }
        content
      end
    end

    # get sha of the branch (= the latest commit)
    def get_branch_sha
      cmd = "git ls-remote '#@repo_url' | awk '/#@branch/ {print $1}'"
      puts cmd
      @branch_sha ||= %x[#{cmd}].chomp
      raise 'Could not get branch sha!' unless $?.success?
      @branch_sha
    end

    # Get the sha of a dir
    def get_tree_sha(dir)
      get_trees['tree'].find { |t| t['path'] == dir }['sha']
    end

    def get_trees
      @trees ||= get_json("#{@git_data_api_host}/#@repo/git/trees/#@branch_sha")
    end

    def get_json(url)
      JSON.parse get_file(url)
    end
  end
end