Module: Docker::Util

Includes:
Error
Defined in:
lib/docker/util.rb

Overview

This module holds shared logic that doesn’t really belong anywhere else in the gem.

Class Method Summary collapse

Class Method Details

.build_auth_header(credentials) ⇒ Object 



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# File 'lib/docker/util.rb', line 61

def build_auth_header(credentials)
  credentials = credentials.to_json if credentials.is_a?(Hash)
  { 'X-Registry-Auth' => Base64.encode64(credentials).gsub(/\n/, '') }
end

.create_dir_tar(directory) ⇒ Object 



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# File 'lib/docker/util.rb', line 24

def create_dir_tar(directory)
  cwd = FileUtils.pwd
  tempfile = File.new('/tmp/out', 'wb')
  FileUtils.cd(directory)
  Archive::Tar::Minitar.pack('.', tempfile)
  File.new('/tmp/out', 'r')
ensure
  FileUtils.cd(cwd)
end

.create_tar(hash = {}) ⇒ Object 



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# File 'lib/docker/util.rb', line 14

def create_tar(hash = {})
  output = StringIO.new
  Gem::Package::TarWriter.new(output) do |tar|
    hash.each do |file_name, input|
      tar.add_file(file_name, 0640) { |tar_file| tar_file.write(input) }
    end
  end
  output.tap(&:rewind).string
end

.extract_id(body) ⇒ Object

Raises:



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# File 'lib/docker/util.rb', line 34

def extract_id(body)
  body.lines.to_a.reverse.each do |line|
    if (id = line.match(/Successfully built ([a-f0-9]+)/)) && !id[1].empty?
      return id[1]
    end
  end
  raise UnexpectedResponseError, "Couldn't find id: #{body}"
end

.file_hash_from_paths(local_paths) ⇒ Object

Convenience method to get the file hash corresponding to an array of local paths.



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# File 'lib/docker/util.rb', line 45

def file_hash_from_paths(local_paths)
  file_hash = {}

  local_paths.each do |local_path|
    if File.exist?(local_path)
      basename = File.basename(local_path)

      file_hash[basename] = File.read(local_path)
    else
      raise ArgumentError, "#{local_path} does not exist."
    end
  end

  file_hash
end

.parse_json(body) ⇒ Object 



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# File 'lib/docker/util.rb', line 8

def parse_json(body)
  JSON.parse(body) unless body.nil? || body.empty? || (body == 'null')
rescue JSON::ParserError => ex
  raise UnexpectedResponseError, ex.message
end