Module: DockerCore::Shell

Defined in:
lib/docker_core.rb

Class Method Summary collapse

Class Method Details

.architecture ⇒ Object 



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# File 'lib/docker_core.rb', line 422

def self.architecture
  hash = { x86: '386', x86_64: 'amd64', armhf: 'armv6', armv7l: 'armv7', aarch64: 'arm64' }
  machine = "#{Etc.uname[:machine]}"
  return hash.fetch(machine.to_sym, machine)
end

.change_mode(mode, *arguments) ⇒ Object

Parameters:

  • arguments (Array<String>)
  • mode (String, Integer) 


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# File 'lib/docker_core.rb', line 454

def self.change_mode(mode, *arguments)
  self.find_paths(*arguments).each do |path|
    FileUtils.chmod_R(mode, path, force: true)
  end
end

.change_owner(*arguments, user: USER, group: GROUP) ⇒ Object

Parameters:

  • arguments (Array<String>)
  • user (String) (defaults to: USER)
  • group (String) (defaults to: GROUP) 


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# File 'lib/docker_core.rb', line 446

def self.change_owner(*arguments, user: USER, group: GROUP)
  self.find_paths(*arguments).each do |path|
    FileUtils.chown_R(user, group, path, force: true)
  end
end

.clear_folders(*arguments, mode: nil) ⇒ Object

Parameters:

  • arguments (Array<String>)
  • mode (Integer, nil) (defaults to: nil) 


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# File 'lib/docker_core.rb', line 646

def self.clear_folders(*arguments, mode: nil)
  self.remove_paths(*arguments)
  self.make_folders(*arguments, mode: mode)
end

.deflate_file(file, path, echo: false) ⇒ Object

Parameters:

  • file (String)
  • path (String)
  • echo (Boolean) (defaults to: false) 


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# File 'lib/docker_core.rb', line 609

def self.deflate_file(file, path, echo: false)
  Zlib::GzipWriter.open(file, Zlib::BEST_COMPRESSION) do

    # @type [Zlib::GzipWriter] writer
  |writer|
    writer.write(self.tape_archive(path, echo: echo))
  end
end

.download_file(uri, file) ⇒ Object

Parameters:

  • uri (String)
  • file (String) 


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# File 'lib/docker_core.rb', line 518

def self.download_file(uri, file)
  uri = self.resolve_link(uri)
  content = Net::HTTP.get(URI(uri))
  return File.binwrite(file, content)
end

.find_paths(*arguments) ⇒ Array<String>

Parameters:

  • arguments (Array<String>)

Returns:

  • (Array<String>) 


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# File 'lib/docker_core.rb', line 435

def self.find_paths(*arguments)
  return Dir.glob(arguments.flatten, File::FNM_DOTMATCH).map do |item|
    next File.path(item)
  end.filter do |item|
    next false == %w[. ..].include?(File.basename(item))
  end.uniq
end

.github_latest_version(repository) ⇒ Object

Parameters:

  • repository (String) 


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# File 'lib/docker_core.rb', line 652

def self.github_latest_version(repository)
  uri = URI("https://api.github.com/repos/#{repository}/releases/latest")
  data = JSON.parse(Net::HTTP.get(uri))['tag_name']
  return "#{data}"

end

.inflate_file(file, path, echo: false) ⇒ Object

Parameters:

  • file (String)
  • path (String)
  • echo (Boolean) (defaults to: false) 


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# File 'lib/docker_core.rb', line 561

def self.inflate_file(file, path, echo: false)
  Zlib::GzipReader.open(file) do

    # @type [Zlib::GzipReader] reader
  |reader|
    self.unpack_archive(reader, path, echo: echo)
  end
end

.is_active_unit(unit) ⇒ Object

Parameters:

  • unit (String) 


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# File 'lib/docker_core.rb', line 429

def self.is_active_unit(unit)
  return 'active' == System.capture("systemctl is-active #{unit}").downcase
end

.link_logs(stdout: '', stderr: '') ⇒ Object

Parameters:

  • stdout (String) (defaults to: '')
  • stderr (String) (defaults to: '') 


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# File 'lib/docker_core.rb', line 632

def self.link_logs(stdout: '', stderr: '')
  if '' != stdout
    File.symlink('/dev/stdout', File.path(stdout))
  end

  if '' != stderr
    File.symlink('/dev/stderr', File.path(stderr))
  end

  return
end

.make_folders(*arguments, mode: nil) ⇒ Object

Parameters:

  • arguments (Array<String>)
  • mode (Integer, nil) (defaults to: nil) 


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# File 'lib/docker_core.rb', line 462

def self.make_folders(*arguments, mode: nil)
  stack = []
  paths = arguments.map do |path|
    next File.path(path)
  end.uniq

  paths.each do |path|
    until path == stack.last
      stack << path
      path = File.dirname(path)
    end
  end

  stack.uniq.each do |path|
    if File.exist?(path) && false == File.directory?(path)
      File.delete(path)
    end
  end

  FileUtils.mkdir_p(paths, mode: mode)
end

.move_paths(source, target) ⇒ Object

Parameters:

  • source (String, Array<String>)
  • target (String) 


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# File 'lib/docker_core.rb', line 493

def self.move_paths(source, target)
  paths = [source].flatten
  FileUtils.mv(self.find_paths(*paths), target)
end

.remove_paths(*arguments) ⇒ Object

Parameters:

  • arguments (Array<String>) 


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# File 'lib/docker_core.rb', line 485

def self.remove_paths(*arguments)
  self.find_paths(*arguments).each do |path|
    FileUtils.rm_rf(path)
  end
end

.resolve_link(uri, max_redirect = 10) ⇒ Object

Parameters:

  • uri (String)
  • max_redirect (Integer) (defaults to: 10) 


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# File 'lib/docker_core.rb', line 500

def self.resolve_link(uri, max_redirect = 10)
  response = Net::HTTP.get_response(URI.parse(uri))

  if false == response.is_a?(Net::HTTPRedirection)
    return uri
  end

  max_redirect = max_redirect - 1

  if 0 == max_redirect
    Error.maximum_redirect
  end

  return self.resolve_link(response['location'], max_redirect)
end

.tape_archive(path, echo: false) ⇒ Object

Parameters:

  • path (String)
  • echo (Boolean) (defaults to: false) 


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# File 'lib/docker_core.rb', line 572

def self.tape_archive(path, echo: false)
  io = StringIO.new('')
  offset = path.size + 1

  Gem::Package::TarWriter.new(io) do

    # @type [Gem::Package::TarWriter] writer
  |writer|
    self.find_paths(File.join(path, '**/*')).each do |name|
      mode = File.stat(name).mode
      file = name.slice(offset ..)

      if echo
        Color.echo(": #{file}", Color::GREEN)
      end

      if File.directory?(name)
        writer.mkdir(file, mode)
        next
      end

      if File.file?(name)
        writer.add_file(file, mode) do |stream|
          stream.write(File.binread(name))
        end
        next
      end
    end
  end

  io.rewind
  return io.string
end

.unpack_archive(io, path, echo: false) ⇒ Object

Parameters:

  • io (Object)
  • path (String)
  • echo (Boolean) (defaults to: false) 


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# File 'lib/docker_core.rb', line 527

def self.unpack_archive(io, path, echo: false)
  Gem::Package::TarReader.new(io) do

    # @type [Gem::Package::TarReader] reader
  |reader|
    reader.rewind
    reader.each do |entry|
      # @type [Gem::Package::TarHeader] header
      header = entry.header
      mode = header.mode
      file = File.join(path, entry.full_name)

      if echo
        Color.echo(": #{file}", Color::GREEN)
      end

      if entry.directory?
        self.make_folders(file, mode: mode)
        next
      end

      if entry.file?
        self.make_folders(File.dirname(file))
        File.binwrite(file, entry.read)
        self.change_mode(mode, file)
        next
      end
    end
  end
end

.update_user(uid: 500, gid: 500) ⇒ Object

Parameters:

  • uid (Integer) (defaults to: 500)
  • gid (Integer) (defaults to: 500) 


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# File 'lib/docker_core.rb', line 620

def self.update_user(uid: 500, gid: 500)
  uid = ENV.fetch('DOCKER_CORE_UID', uid)
  gid = ENV.fetch('DOCKER_CORE_GID', gid)

  System.run('deluser', USER, throw: false)
  System.run('delgroup', GROUP, throw: false)
  System.run('addgroup', { system: true, gid: gid }, GROUP)
  System.run('adduser', { system: true, 'disabled-password': true, 'no-create-home': true, ingroup: GROUP, gecos: USER, shell: '/bin/bash', uid: uid }, USER)
end