Module: LeechtopDownloader::CLIHelpers

Extended by:
T::Sig
Included in:
CLI
Defined in:
lib/leechtop_downloader/cli_helpers.rb

Overview

CLIHelpers provides shared utility methods for CLI operations

Instance Method Summary collapse

Instance Method Details

#acquire_lock(lock_path) ⇒ Object 



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# File 'lib/leechtop_downloader/cli_helpers.rb', line 59

def acquire_lock(lock_path)
  File.new(lock_path, File::WRONLY | File::CREAT | File::EXCL).close
  true
rescue Errno::EEXIST
  false
end

#fix_encoding(name) ⇒ Object 



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# File 'lib/leechtop_downloader/cli_helpers.rb', line 78

def fix_encoding(name)
  fixed = name.encode('iso-8859-1').force_encoding('utf-8')
  fixed.valid_encoding? ? fixed : name
rescue EncodingError
  name
end

#lock_path_for(url, filename_hint, destination) ⇒ Object 



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# File 'lib/leechtop_downloader/cli_helpers.rb', line 50

def lock_path_for(url, filename_hint, destination)
  lock_filename = filename_hint.empty? ? "#{Digest::MD5.hexdigest(url)}.lock" : "#{filename_hint}.lock"
  File.join(destination, lock_filename)
end

#skip_download?(filename_hint, skip_existing, destination) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/leechtop_downloader/cli_helpers.rb', line 33

def skip_download?(filename_hint, skip_existing, destination)
  return false unless skip_existing && !filename_hint.empty?

  if File.exist?(File.join(destination, filename_hint))
    Kernel.puts "File #{filename_hint} already exists. Skipping."
    true
  else
    false
  end
end

#skip_locked(filename_hint) ⇒ Object 



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# File 'lib/leechtop_downloader/cli_helpers.rb', line 69

def skip_locked(filename_hint)
  name = filename_hint.empty? ? 'File' : "File #{filename_hint}"
  Kernel.puts "#{name} is currently being downloaded by another process. Skipping."
end

#with_app_lock(&blk) ⇒ Object 



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# File 'lib/leechtop_downloader/cli_helpers.rb', line 15

def with_app_lock(&blk)
  lock_path = File.join(Dir.tmpdir, 'leechtop_downloader.lock')
  File.open(lock_path, 'w') do |file|
    unless file.flock(File::LOCK_EX | File::LOCK_NB)
      Kernel.puts 'Error: Another instance of leechtop downloader is already running.'
      Kernel.exit(1)
    end

    blk.call
  end
end