Module: Embulk

Defined in:
lib/embulk.rb,
lib/embulk/exec.rb,
lib/embulk/page.rb,
lib/embulk/error.rb,
lib/embulk/buffer.rb,
lib/embulk/column.rb,
lib/embulk/logger.rb,
lib/embulk/plugin.rb,
lib/embulk/runner.rb,
lib/embulk/schema.rb,
lib/embulk/version.rb,
lib/embulk/guess/csv.rb,
lib/embulk/file_input.rb,
lib/embulk/guess/gzip.rb,
lib/embulk/data_source.rb,
lib/embulk/file_output.rb,
lib/embulk/java_plugin.rb,
lib/embulk/guess_plugin.rb,
lib/embulk/input_plugin.rb,
lib/embulk/page_builder.rb,
lib/embulk/filter_plugin.rb,
lib/embulk/guess/charset.rb,
lib/embulk/guess/newline.rb,
lib/embulk/output_plugin.rb,
lib/embulk/parser_plugin.rb,
lib/embulk/decoder_plugin.rb,
lib/embulk/encoder_plugin.rb,
lib/embulk/java/bootstrap.rb,
lib/embulk/executor_plugin.rb,
lib/embulk/plugin_registry.rb,
lib/embulk/formatter_plugin.rb,
lib/embulk/java/time_helper.rb,
lib/embulk/data/package_data.rb,
lib/embulk/file_input_plugin.rb,
lib/embulk/command/embulk_run.rb,
lib/embulk/file_output_plugin.rb,
lib/embulk/command/embulk_example.rb,
lib/embulk/command/embulk_new_plugin.rb,
lib/embulk/command/embulk_selfupdate.rb,
lib/embulk/command/embulk_generate_bin.rb,
lib/embulk/command/embulk_migrate_plugin.rb,
lib/embulk/data/bundle/embulk/input/example.rb,
lib/embulk/data/bundle/embulk/filter/example.rb,
lib/embulk/data/bundle/embulk/output/example.rb

Defined Under Namespace

Modules: Exec, Filter, Guess, Impl, Input, Java, Output, Plugin, Type Classes: Buffer, Column, ConfigError, DataError, DataSource, DecoderPlugin, EmbulkRunner, EncoderPlugin, ExecutorPlugin, FileInput, FileInputPlugin, FileOutput, FileOutputPlugin, FilterPlugin, FormatterPlugin, GuessPlugin, InputPlugin, JavaPlugin, LineGuessPlugin, Logger, Migrator, OutputPlugin, PackageData, Page, PageBuilder, ParserPlugin, PluginManager, PluginRegistry, Schema, Slf4jAdapter, StandardLoggerAdapter, TextGuessPlugin

Constant Summary collapse

VERSION = 
'0.7.2'
@@logger =

default logger

Logger.new(STDOUT)

Class Method Summary collapse

Class Method Details

.b(s) ⇒ Object 



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# File 'lib/embulk/command/embulk_generate_bin.rb', line 59

def self.b(s)
  s.force_encoding('ASCII-8BIT')
end

.check_latest_version ⇒ Object 



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# File 'lib/embulk/command/embulk_selfupdate.rb', line 70

def self.check_latest_version
  require 'net/https'
  bintray = Net::HTTP.new('bintray.com', 443)
  bintray.use_ssl = true
  bintray.verify_mode = OpenSSL::SSL::VERIFY_NONE
  bintray.start do
    response = bintray.get('/embulk/maven/embulk/_latestVersion')
    raise "Expected response code 302 Found but got #{response.code}" if response.code != "302"
    location = response["Location"].to_s
    m = /(\d+\.\d+[^\/]+)/.match(location)
    raise "Cound not find version number in Location header '#{location}'" unless m
    return m[1]
  end
end

.create_example(path) ⇒ Object 



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# File 'lib/embulk/command/embulk_example.rb', line 2

def self.create_example(path)
  require 'fileutils'
  require 'zlib'

  puts "  Creating #{path}/"
  FileUtils.mkdir_p File.join(path, 'csv')
  puts "  Creating #{path}/csv/"

  puts "  Creating #{path}/csv/sample_01.csv.gz"
  Zlib::GzipWriter.open(File.join(path, 'csv', 'sample_01.csv.gz')) do |f|
    f.write "id,account,time,purchase,comment\n1,32864,2015-01-27 19:23:49,20150127,embulk\n2,14824,2015-01-27 19:01:23,20150127,embulk jruby\n3,27559,2015-01-28 02:20:02,20150128,\"Embulk \"\"csv\"\" parser plugin\"\n4,11270,2015-01-29 11:54:36,20150129,NULL\n"
  end

  puts "  Creating #{path}/example.yml"
  File.open(File.join(path, 'example.yml'), 'w') do |f|
    f.write "in:\ntype: file\npath_prefix: \"\#{File.expand_path File.join(path, 'csv', 'sample_')}\"\nout:\ntype: stdout\n"
  end
end

.default_gem_home ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 285

def self.default_gem_home
  if RUBY_PLATFORM =~ /java/i
    user_home = java.lang.System.properties["user.home"]
  end
  user_home ||= ENV['HOME']
  unless user_home
    raise "HOME environment variable is not set."
  end
  File.expand_path File.join(user_home, '.embulk', Gem.ruby_engine, RbConfig::CONFIG['ruby_version'])
end

.generate_bin(options = {}) ⇒ Object 



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# File 'lib/embulk/command/embulk_generate_bin.rb', line 2

def self.generate_bin(options={})
  jruby_jar_path = org.jruby.Main.java_class.protection_domain.code_source.location.to_s
  if __FILE__ =~ /^classpath:/ || __FILE__.include?('!/')
    resource_class = org.embulk.command.Runner.java_class
    ruby_script_path = resource_class.resource("/embulk/command/embulk.rb").to_s
  else
    ruby_script_path = File.join(File.dirname(__FILE__), 'embulk.rb')
  end
  java_home = java.lang.System.properties['java.home']

  generate_bin_data(jruby_jar_path, ruby_script_path, options.merge(java_home: java_home))
end

.generate_bin_data(jruby_jar_path, ruby_script_path, options = {}) ⇒ Object 



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# File 'lib/embulk/command/embulk_generate_bin.rb', line 15

def self.generate_bin_data(jruby_jar_path, ruby_script_path, options={})
  if java_home = options[:java_home]
    java_home_script = %{export JAVA_HOME='#{java_home}'}
    java_path = %{"$JAVA_HOME"/bin/java}
  else
    java_home_script = %{}
    java_path = %{java}
  end

  # TODO parse -D options to set them to java
  shell_script = "#!/bin/sh\n=begin 2>/dev/null\n\#{java_home_script}\nexec \#{java_path} -classpath \"$0\" org.jruby.Main \"$0\" \"$@\"\nexit 127\n=end\n"

  if options[:bundle_path] == :here
    bundle_path_script = %{ENV['EMBULK_BUNDLE_PATH'] = File.expand_path('..', File.dirname(__FILE__))}
  elsif path = options[:bundle_path]
    bundle_path_script = %{ENV['EMBULK_BUNDLE_PATH'] = '#{path}'}
  else
    bundle_path_script = b ''
  end

  ruby_init_script = b "\#{bundle_path_script}\nENV.delete 'GEM_HOME'\nENV.delete 'GEM_PATH'\n"

  ruby_script = b(File.read(ruby_script_path))
  if i = ruby_script.index(b("\n__END__\n"))
    # delete contents after __END__
    ruby_script = ruby_script[0, i]
  end

  jruby_jar = b(File.read(jruby_jar_path))

  data = shell_script << ruby_init_script + ruby_script << b("\n__END__\n") << jruby_jar
end

.java? ⇒ Boolean 



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# File 'lib/embulk.rb', line 3

def self.java?
  true
end

.lib_path(path) ⇒ Object 



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# File 'lib/embulk.rb', line 15

def self.lib_path(path)
  path = '' if path == '/'
  jar, resource = __FILE__.split("!", 2)
  if resource
    lib = resource.split("/")[0..-2].join("/")
    "#{jar}!#{lib}/#{path}"
  elsif __FILE__ =~ /^classpath:/
    lib = __FILE__.split("/")[0..-2].join("/")
    "#{lib}/#{path}"
  else
    lib = File.expand_path File.dirname(__FILE__)
    File.join(lib, *path.split("/"))
  end
end

.logger ⇒ Object 



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# File 'lib/embulk/logger.rb', line 144

def self.logger
  @@logger
end

.logger=(logger) ⇒ Object 



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# File 'lib/embulk/logger.rb', line 148

def self.logger=(logger)
  @@logger = logger
end

.migrate_java_plugin(migrator, from_ver) ⇒ Object 



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# File 'lib/embulk/command/embulk_migrate_plugin.rb', line 38

def self.migrate_java_plugin(migrator, from_ver)
  if from_ver < version("0.7.0")
    # rename CommitReport to TaskReport
    migrator.replace("**/*.java", /(CommitReport)/, "TaskReport")
    migrator.replace("**/*.java", /(commitReport)/, "taskReport")
  end

  if migrator.match("gradle/wrapper/gradle-wrapper.properties", /gradle-2\.[12345]\W+/)
    # gradle < 2.6
    require 'embulk/data/package_data'
    data = PackageData.new("new", migrator.path)
    migrator.write "gradle/wrapper/gradle-wrapper.jar", data.content("java/gradle/wrapper/gradle-wrapper.jar")
    migrator.write "gradle/wrapper/gradle-wrapper.properties", data.content("java/gradle/wrapper/gradle-wrapper.properties")
  end

  #
  # add rules...
  ##

  # update version at the end
  migrator.replace("**/build.gradle", /org\.embulk:embulk-(?:core|standards):([\d\.]+)?/, Embulk::VERSION)
end

.migrate_plugin(path) ⇒ Object 



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# File 'lib/embulk/command/embulk_migrate_plugin.rb', line 2

def self.migrate_plugin(path)
  migrator = Migrator.new(path)

  if ms = migrator.match("**/build.gradle", /org\.embulk:embulk-core:([\d\.]+)?/)
    lang = :java
    from_ver = version(ms[0][1])
    puts "Detected Java plugin for Embulk #{from_ver}..."

  elsif ms = migrator.match("**/*.gemspec", /add_(?:development_)?dependency\s+\W+embulk\W+\s+([\d\.]+)\W+/)
    lang = :ruby
    from_ver = version(ms[0][1])
    puts "Detected Ruby plugin for Embulk #{from_ver}..."

  elsif ms = migrator.match("**/*.gemspec", /embulk-/)
    lang = :ruby
    from_ver = version("0.1.0")
    puts "Detected Ruby plugin for unknown Embulk version..."

  else
    raise "Failed to detect plugin language and dependency version"
  end

  case lang
  when :java
    migrate_java_plugin(migrator, from_ver)
  when :ruby
    migrate_ruby_plugin(migrator, from_ver)
  end

  if migrator.modified_files.empty?
    puts "Done. No files are modified."
  else
    puts "Done. Please check modifieid files."
  end
end

.migrate_ruby_plugin(migrator, from_ver) ⇒ Object 



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# File 'lib/embulk/command/embulk_migrate_plugin.rb', line 61

def self.migrate_ruby_plugin(migrator, from_ver)
  #
  # add rules...
  ##

  migrator.write(".ruby-version", "jruby-9.0.0.0")

  # update version at the end
  if from_ver <= version("0.1.0")
    # add add_development_dependency
    migrator.insert_line("**/*.gemspec", /([ \t]*\w+)\.add_development_dependency/) {|m|
      "#{m[1]}.add_development_dependency 'embulk', ['~> #{Embulk::VERSION}']"
    }
  else
    migrator.replace("**/*.gemspec", /add_(?:development_)?dependency\s+\W+embulk\W+\s+([\d\.]+)\W+/, Embulk::VERSION)
  end
end

.new_plugin(name, language, category) ⇒ Object 



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# File 'lib/embulk/command/embulk_new_plugin.rb', line 2

def self.new_plugin(name, language, category)
  require 'embulk/data/package_data'
  require 'embulk/version'
  require 'fileutils'

  embulk_category = category
  embulk_category = :input if category == :file_input
  embulk_category = :output if category == :file_output

  name = name.gsub(/[^a-zA-Z0-9_]+/, '_')  # replace '-' to '_'

  full_project_name = "embulk-#{embulk_category}-#{name}"
  plugin_dir = "lib/embulk"
  plugin_path = "#{plugin_dir}/#{embulk_category}/#{name}.rb"

  if File.exist?(full_project_name)
    raise "./#{full_project_name} already exists. Please delete it first."
  end
  FileUtils.mkdir_p(full_project_name)

  puts "Creating #{full_project_name}/"

  success = false
  begin
    #
    # Generate gemspec
    #
    author = `git config user.name`.strip
    author = "YOUR_NAME" if author.empty?
    email = `git config user.email`.strip
    email = "YOUR_NAME" if email.empty?

    # variables used in erb templates
    ruby_class_name = name.split('_').map {|a| a.capitalize }.join
    java_iface_name = category.to_s.split('_').map {|a| a.capitalize }.join
    java_class_name = name.split('_').map {|a| a.capitalize }.join + java_iface_name + "Plugin"
    java_package_name = "org.embulk.#{embulk_category}.#{name}"
    display_name = name.split('_').map {|a| a.capitalize }.join(' ')
    display_category = category.to_s.gsub('_', ' ')

    extra_guess_erb = {}

    case category
    when :input
      description = %[Loads records from #{display_name}.]
    when :file_input
      description = %[Reads files stored on #{display_name}.]
    when :parser
      description = %[Parses #{display_name} files read by other file input plugins.]
      extra_guess_erb["ruby/parser_guess.rb.erb"] = "#{plugin_dir}/guess/#{name}.rb"
    when :decoder
      description = %[Decodes #{display_name}-encoded files read by other file input plugins.]
      extra_guess_erb["ruby/decoder_guess.rb.erb"] = "#{plugin_dir}/guess/#{name}.rb"
    when :output
      description = %[Dumps records to #{display_name}.]
    when :file_output
      description = %[Stores files on #{display_name}.]
    when :formatter
      description = %[Formats #{display_name} files for other file output plugins.]
    when :encoder
      description = %[Encodes files using #{display_name} for other file output plugins.]
    when :filter
      description = %[#{display_name}]
    end

    #
    # Generate project repository
    #
    pkg = Embulk::PackageData.new("new", full_project_name, binding())

    pkg.cp_erb("README.md.erb", "README.md")
    pkg.cp("LICENSE.txt", "LICENSE.txt")
    pkg.cp_erb("gitignore.erb", ".gitignore")

    case language
    when :ruby
      pkg.cp("ruby/Rakefile", "Rakefile")
      pkg.cp("ruby/Gemfile", "Gemfile")
      pkg.cp("ruby/.ruby-version", ".ruby-version")
      pkg.cp_erb("ruby/gemspec.erb", "#{full_project_name}.gemspec")
      pkg.cp_erb("ruby/#{category}.rb.erb", plugin_path)

    when :java
      pkg.cp("java/gradle/wrapper/gradle-wrapper.jar", "gradle/wrapper/gradle-wrapper.jar")
      pkg.cp("java/gradle/wrapper/gradle-wrapper.properties", "gradle/wrapper/gradle-wrapper.properties")
      pkg.cp("java/gradlew.bat", "gradlew.bat")
      pkg.cp("java/gradlew", "gradlew")
      pkg.set_executable("gradlew")
      pkg.cp_erb("java/build.gradle.erb", "build.gradle")
      pkg.cp_erb("java/plugin_loader.rb.erb", plugin_path)
      pkg.cp_erb("java/#{category}.java.erb", "src/main/java/#{java_package_name.gsub(/\./, '/')}/#{java_class_name}.java")
      pkg.cp_erb("java/test.java.erb", "src/test/java/#{java_package_name.gsub(/\./, '/')}/Test#{java_class_name}.java")
    end

    extra_guess_erb.each_pair do |erb,dest|
      pkg.cp_erb(erb, dest)
    end

    puts ""
    puts "Plugin template is successfully generated."

    case language
    when :ruby
      puts "Next steps:"
      puts ""
      puts "  $ cd #{full_project_name}"
      puts "  $ bundle install                      # install one using rbenv & rbenv-build"
      puts "  $ bundle exec rake                    # build gem to be released"
      puts "  $ bundle exec embulk run config.yml   # you can run plugin using this command"
    when :java
      puts "Next steps:"
      puts ""
      puts "  $ cd #{full_project_name}"
      puts "  $ ./gradlew package"
    end

    success = true
    puts ""
  ensure
    FileUtils.rm_rf full_project_name unless success
  end
end

.require_classpath ⇒ Object 



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# File 'lib/embulk.rb', line 30

def self.require_classpath
  if __FILE__.include?("!")
    # single jar
    jar, resource = __FILE__.split("!", 2)
    begin
      require File.expand_path(jar)
    rescue LoadError
      # TODO fails if jar doesn't end with ".rb" or ".jar" but ignorable
    end

  elsif __FILE__ =~ /^classpath:/
    # already in classpath

  else
    # gem package
    gem_root = File.expand_path('..', File.dirname(__FILE__))
    classpath_dir = File.join(gem_root, "classpath")
    jars = Dir.entries(classpath_dir).select{|f| f =~ /\.jar$/ }.sort
    jars.each do |jar|
      require File.join(classpath_dir, jar)
    end
  end
end

.run(argv) ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 4

def self.run(argv)
  # reset context class loader set by org.jruby.Main.main to nil. embulk manages
  # multiple classloaders. default classloader should be Plugin.class.getClassloader().
  java.lang.Thread.current_thread.set_context_class_loader(nil)

  # Gem.path is called when GemRunner installs a gem with native extension.
  # Running extconf.rb fails without this hack.
  fix_gem_ruby_path

  require 'embulk/version'

  i = argv.find_index {|arg| arg !~ /^\-/ }
  unless i
    if argv.include?('--version')
      puts "embulk #{Embulk::VERSION}"
      system_exit_success
    end
    usage nil
  end
  subcmd = argv.slice!(i).to_sym

  require 'java'
  require 'optparse'
  op = OptionParser.new
  op.version = Embulk::VERSION

  puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S.%3N %z")}: Embulk v#{Embulk::VERSION}"

  plugin_paths = []
  load_paths = []
  classpaths = []
  classpath_separator = java.io.File.pathSeparator

  options = {
    system_config: {}
  }

  java_embed_ops = lambda do
    op.separator ""
    op.separator "  Other options:"
    op.on('-l', '--log-level LEVEL', 'Log level (error, warn, info, debug or trace)') do |level|
      options[:system_config][:log_level] = level
    end
    op.on('-X KEY=VALUE', 'Add a performance system config') do |kv|
      k, v = kv.split('=', 2)
      v ||= "true"
      options[:system_config][k] = v
    end
  end

  plugin_load_ops = lambda do
    op.separator ""
    op.separator "  Plugin load options:"
    op.on('-L', '--load PATH', 'Add a local plugin path') do |plugin_path|
      plugin_paths << plugin_path
    end
    op.on('-I', '--load-path PATH', 'Add ruby script directory path ($LOAD_PATH)') do |load_path|
      load_paths << load_path
    end
    op.on('-C', '--classpath PATH', "Add java classpath separated by #{classpath_separator} (CLASSPATH)") do |classpath|
      classpaths.concat classpath.split(classpath_separator)
    end
    op.on('-b', '--bundle BUNDLE_DIR', 'Path to a Gemfile directory (create one using "embulk bundle new" command)') do |path|
      # only for help message. implemented at lib/embulk/command/embulk_bundle.rb
    end
  end

  case subcmd
  when :run
    op.banner = "Usage: run <config.yml>"
    op.separator "  Options:"
    op.on('-r', '--resume-state PATH', 'Path to a file to write or read resume state') do |path|
      options[:resume_state_path] = path
    end
    op.on('-o', '--output PATH', 'Path to a file to write the next configuration') do |path|
      options[:next_config_output_path] = path
    end
    plugin_load_ops.call
    java_embed_ops.call
    args = 1..1

  when :cleanup
    op.banner = "Usage: cleanup <config.yml>"
    op.separator "  Options:"
    op.on('-r', '--resume-state PATH', 'Path to a file to write or read resume state') do |path|
      options[:resume_state_path] = path
    end
    plugin_load_ops.call
    java_embed_ops.call
    args = 1..1

  when :preview
    op.banner = "Usage: preview <config.yml>"
    op.separator "  Options:"
    op.on('-G', '--vertical', "Use vertical output format", TrueClass) do |b|
      options[:format] = "vertical"
    end
    plugin_load_ops.call
    java_embed_ops.call
    args = 1..1

  when :guess
    op.banner = "Usage: guess <partial-config.yml>"
    op.separator "  Options:"
    op.on('-o', '--output PATH', 'Path to a file to write the guessed configuration') do |path|
      options[:next_config_output_path] = path
    end
    op.on('-g', '--guess NAMES', "Comma-separated list of guess plugin names") do |names|
      (options[:system_config][:guess_plugins] ||= []).concat names.split(",")  # TODO
    end
    plugin_load_ops.call
    java_embed_ops.call
    args = 1..1

  when :bundle
    if argv[0] == 'new'
      usage nil if argv.length != 2
      new_bundle(argv[1])
    else
      gemfile_path = ENV['BUNDLE_GEMFILE'].to_s

      if !gemfile_path.empty?
        bundle_path = File.dirname(gemfile_path)
      elsif File.exists?('Gemfile')
        bundle_path = '.'
      else
        system_exit "'#{path}' already exists. You already ran 'embulk bundle new'. Please remove it, or run \"cd #{path}\" and \"embulk bundle\" instead"
      end

      run_bundler(argv)
    end
    system_exit_success

  when :gem
    require 'rubygems/gem_runner'
    Gem::GemRunner.new.run argv
    system_exit_success

  when :new
    op.banner = "Usage: new <category> <name>" + %[
categories:
  ruby-input                 Ruby record input plugin    (like "mysql")
  ruby-output                Ruby record output plugin   (like "mysql")
  ruby-filter                Ruby record filter plugin   (like "add-hostname")
  #ruby-file-input           Ruby file input plugin      (like "ftp")          # not implemented yet [#21]
  #ruby-file-output          Ruby file output plugin     (like "ftp")          # not implemented yet [#22]
  ruby-parser                Ruby file parser plugin     (like "csv")
  ruby-formatter             Ruby file formatter plugin  (like "csv")
  #ruby-decoder              Ruby file decoder plugin    (like "gzip")         # not implemented yet [#31]
  #ruby-encoder              Ruby file encoder plugin    (like "gzip")         # not implemented yet [#32]
  java-input                 Java record input plugin    (like "mysql")
  java-output                Java record output plugin   (like "mysql")
  java-filter                Java record filter plugin   (like "add-hostname")
  java-file-input            Java file input plugin      (like "ftp")
  java-file-output           Java file output plugin     (like "ftp")
  java-parser                Java file parser plugin     (like "csv")
  java-formatter             Java file formatter plugin  (like "csv")
  java-decoder               Java file decoder plugin    (like "gzip")
  java-encoder               Java file encoder plugin    (like "gzip")

examples:
  new ruby-output hbase
  new ruby-filter int-to-string
]
    args = 2..2

  when :migrate
    op.banner = "Usage: migrate <directory>"
    args = 1..1

  when :selfupdate
    op.on('-f', "Skip corruption check", TrueClass) do |b|
      options[:force] = true
    end
    args = 0..0

  when :example
    args = 0..1

  when :exec
    exec(*argv)
    exit 127

  when :irb
    require 'irb'
    IRB.start
    system_exit_success

  else
    usage "Unknown subcommand #{subcmd.to_s.dump}."
  end

  begin
    op.parse!(argv)
    unless args.include?(argv.length)
      usage_op op, nil
    end
  rescue => e
    usage_op op, e.to_s
  end

  case subcmd
  when :example
    require 'embulk/command/embulk_example'
    path = ARGV[0] || "embulk-example"
    puts "Creating #{path} directory..."
    Embulk.create_example(path)
    puts ""
    puts "Run following subcommands to try embulk:"
    puts ""
    puts "   1. embulk guess #{File.join(path, 'example.yml')} -o config.yml"
    puts "   2. embulk preview config.yml"
    puts "   3. embulk run config.yml"
    puts ""

  when :new
    lang_cate = ARGV[0]
    name = ARGV[1]

    language, category = case lang_cate
      when "java-input"       then [:java, :input]
      when "java-output"      then [:java, :output]
      when "java-filter"      then [:java, :filter]
      when "java-file-input"  then [:java, :file_input]
      when "java-file-output" then [:java, :file_output]
      when "java-parser"      then [:java, :parser]
      when "java-formatter"   then [:java, :formatter]
      when "java-decoder"     then [:java, :decoder]
      when "java-encoder"     then [:java, :encoder]
      when "ruby-input"       then [:ruby, :input]
      when "ruby-output"      then [:ruby, :output]
      when "ruby-filter"      then [:ruby, :filter]
      when "ruby-file-input"  then raise "ruby-file-input is not implemented yet. See #21 on github." #[:ruby, :file_input]
      when "ruby-file-output" then raise "ruby-file-output is not implemented yet. See #22 on github." #[:ruby, :file_output]
      when "ruby-parser"      then [:ruby, :parser]
      when "ruby-formatter"   then [:ruby, :formatter]
      when "ruby-decoder"     then raise "ruby-decoder is not implemented yet. See #31 on github." #[:ruby, :decoder]
      when "ruby-encoder"     then raise "ruby-decoder is not implemented yet. See #32 on github." #[:ruby, :encoder]
      else
        usage_op op, "Unknown category '#{lang_cate}'"
      end

    require 'embulk/command/embulk_new_plugin'
    Embulk.new_plugin(name, language, category)

  when :migrate
    path = ARGV[0]
    require 'embulk/command/embulk_migrate_plugin'
    Embulk.migrate_plugin(path)

  when :selfupdate
    require 'embulk/command/embulk_selfupdate'
    Embulk.selfupdate(options)

  else
    require 'json'

    Embulk.setup(options.delete(:system_config))

    setup_plugin_paths(plugin_paths)
    setup_load_paths(load_paths)
    setup_classpaths(classpaths)

    begin
      case subcmd
      when :guess
        Embulk::Runner.guess(argv[0], options)
      when :preview
        Embulk::Runner.preview(argv[0], options)
      when :run
        Embulk::Runner.run(argv[0], options)
      end
    rescue => ex
      print_exception(ex)
      puts ""
      puts "Error: #{ex}"
      raise SystemExit.new(1, ex.to_s)
    end
  end
end

.selfupdate(options = {}) ⇒ Object 



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# File 'lib/embulk/command/embulk_selfupdate.rb', line 2

def self.selfupdate(options={})
  require 'uri'

  jar, resource = __FILE__.split("!", 2)
  jar_path = URI.parse(jar).path rescue jar
  unless resource && File.file?(jar_path)
    STDERR.puts ""
    STDERR.puts "Embulk is not installed by a single jar. Selfupdate is not supported."
    STDERR.puts "If you used gem to install embulk, please run: "
    STDERR.puts ""
    STDERR.puts "  $ gem install embulk"
    STDERR.puts ""
    raise SystemExit.new(1)
  end

  puts "Checking the latest version..."
  latest_version = check_latest_version

  if Gem::Version.new(latest_version) <= Gem::Version.new(Embulk::VERSION)
    puts "Already up-to-date. #{latest_version} is the latest version."
    return
  end

  puts "Found new version #{latest_version}."

  unless File.writable?(jar_path)
    STDERR.puts ""
    STDERR.puts "Installation path #{jar_path} is not writable."
    STDERR.puts "Dou you need to run with sudo?"
    STDERR.puts ""
    raise SystemExit.new(1)
  end

  url = "https://dl.bintray.com/embulk/maven/embulk-#{latest_version}.jar"
  puts "Downloading #{url} ..."

  require 'open-uri'
  require 'tempfile'
  Tempfile.open(["embulk-selfupdate", ".jar"]) do |tmp|
    tmp.chmod(File.stat(jar_path).mode)
    OpenURI.open_uri(url) do |f|
      IO.copy_stream(f, tmp)
    end
    tmp.close(false)

    # check corruption
    unless options[:force]
      begin
        data = File.read("jar:#{java.io.File.new(tmp.path).toURI.toURL}!/embulk/version.rb")
        m = Module.new
        m.module_eval(data)
        unless m::Embulk::VERSION == latest_version
          raise "Embulk::VERSION does not match with #{latest_version}"
        end
      rescue => e
        STDERR.puts "Corruption checking failed (#{e})."
        STDERR.puts "This version might include incompatible changes."
        STDERR.puts "Please add '-f' argument to selfupdate command to skip checking."
        raise SystemExit.new(1, e.to_s)
      end
    end

    File.rename(tmp.path, jar_path)
  end

  puts "Updated to #{latest_version}."
end

.setup(system_config = {}) ⇒ Object 



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# File 'lib/embulk.rb', line 54

def self.setup(system_config={})
  unless RUBY_PLATFORM =~ /java/i
    raise "Embulk.setup works only with JRuby."
  end

  require 'json'

  require_classpath

  systemConfigJson = system_config.merge({
    # use the global ruby runtime for all ScriptingContainer
    # injected by org.embulk.jruby.JRubyScriptingModule
    use_global_ruby_runtime: true
  }).to_json

  bootstrap = org.embulk.EmbulkEmbed::Bootstrap.new
  systemConfig = bootstrap.getSystemConfigLoader.fromJsonString(systemConfigJson)
  bootstrap.setSystemConfig(systemConfig)
  embed = bootstrap.java_method(:initialize).call  # see embulk-core/src/main/java/org/embulk/jruby/JRubyScriptingModule.

  # see also embulk/java/bootstrap.rb loaded by JRubyScriptingModule

  Embulk.const_set :Runner, EmbulkRunner.new(embed)
end