Module: NHKore::CLI::GetCmd

Included in:
App
Defined in:
lib/nhkore/cli/get_cmd.rb

Constant Summary collapse

DEFAULT_GET_CHUNK_SIZE = 
4 * 1024
DEFAULT_GET_URL_LENGTH =

Just a generous estimation used as a fallback; may be outdated.

11_000_000
GET_URL_FILENAME = 
'nhkore-core.zip'
GET_URL = 
"https://github.com/esotericpig/nhkore/releases/latest/download/#{GET_URL_FILENAME}"

Instance Method Summary collapse

Instance Method Details

#build_get_cmd ⇒ Object 



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# File 'lib/nhkore/cli/get_cmd.rb', line 23

def build_get_cmd
  app = self

  @get_cmd = @app_cmd.define_command do
    name    'get'
    usage   'get [OPTIONS] [COMMAND]...'
    aliases :g
    summary "Download NHKore's pre-scraped files from the latest release" \
            " (aliases: #{app.color_alias('g')})"

    description(<<-DESC)
      Download NHKore's pre-scraped files from the latest release &
      save to folder: #{Util::CORE_DIR}

      Note: the latest NHK articles may not have been scraped yet.
    DESC

    option :o,:out,'directory to save downloaded files to',argument: :required,default: Util::CORE_DIR,
        transform: lambda { |value|
          app.check_empty_opt(:out,value)
        }
    flag nil,:'show-url','show download URL and exit (for downloading manually)' do |value,cmd|
      puts GET_URL
      exit
    end

    run do |opts,args,cmd|
      app.refresh_cmd(opts,args,cmd)
      app.run_get_cmd
    end
  end
end

#run_get_cmd ⇒ Object 



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# File 'lib/nhkore/cli/get_cmd.rb', line 56

def run_get_cmd
  require 'down/net_http'
  require 'tempfile'
  require 'zip'

  build_out_dir(:out,default_dir: Util::CORE_DIR)

  return unless check_out_dir(:out)

  chunk_size = DEFAULT_GET_CHUNK_SIZE
  down = nil
  dry_run = @cmd_opts[:dry_run]
  force = @cmd_opts[:force]
  max_retries = @scraper_kargs[:max_retries]
  max_retries = 3 if max_retries.nil?
  out_dir = @cmd_opts[:out]

  begin
    start_spin('Opening URL')

    begin
      down = Down::NetHttp.open(GET_URL,rewindable: false,**@scraper_kargs)
    rescue Down::ConnectionError
      raise if (max_retries -= 1) < 0
      retry
    end

    stop_spin

    return if dry_run

    Tempfile.create(["#{App::NAME}_",'.zip'],binmode: true) do |file|
      puts
      puts "Downloading #{GET_URL_FILENAME} to temp file:"
      puts "> #{file.path}"

      len = down.size
      len = DEFAULT_GET_LENGTH if len.nil? || len < 1
      bar = build_progress_bar('> Downloading',download: true,total: len)

      bar.start

      while !down.eof?
        file.write(down.read(chunk_size))
        bar.advance(chunk_size)
      end

      down.close
      file.close
      bar.finish

      puts
      puts "Extracting #{GET_URL_FILENAME}..."

      # We manually ask the user whether to overwrite each file, so set this to
      # true so that Zip extract() will force overwrites and not raise an error.
      Zip.on_exists_proc = true

      Zip::File.open(file) do |zip_file|
        zip_file.each do |entry|
          if !entry.name_safe?
            raise ZipError,"unsafe entry name[#{entry.name}] in Zip file"
          end

          name = Util.strip_web_str(File.basename(entry.name))

          next if name.empty?

          out_file = File.join(out_dir,name)

          puts "> #{name}"

          if !force && File.exist?(out_file)
            puts
            puts 'Warning: output file already exists!'
            puts "> '#{out_file}'"

            overwrite = @high.agree('Overwrite this file (yes/no)? ')
            puts

            next unless overwrite
          end

          entry.extract(out_file)
        end
      end

      puts
      puts "Extracted #{GET_URL_FILENAME} to directory:"
      puts "> #{out_dir}"
    end
  ensure
    down.close if !down.nil? && !down.closed?
  end
end