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, PluginLoadError, PluginManager, PluginRegistry, Schema, Slf4jAdapter, StandardLoggerAdapter, TextGuessPlugin

Constant Summary collapse

VERSION = 
'0.8.2'
@@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

.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 <<EOF
id,account,time,purchase,comment
1,32864,2015-01-27 19:23:49,20150127,embulk
2,14824,2015-01-27 19:01:23,20150127,embulk jruby
3,27559,2015-01-28 02:20:02,20150128,"Embulk ""csv"" parser plugin"
4,11270,2015-01-29 11:54:36,20150129,NULL
EOF
  end

  puts "  Creating #{path}/seed.yml"
  File.open(File.join(path, 'seed.yml'), 'w') do |f|
    f.write <<EOF
in:
type: file
path_prefix: "#{File.expand_path File.join(path, 'csv', 'sample_')}"
out:
type: stdout
EOF
  end
end

.default_gem_home ⇒ Object 



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# File 'lib/embulk/command/embulk_run.rb', line 317

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|uri:classloader):/ || __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 = <<EOF
#!/bin/sh
=begin 2>/dev/null
#{java_home_script}
exec #{java_path} -classpath "$0" org.jruby.Main "$0" "$@"
exit 127
=end
EOF

  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 <<EOF
#{bundle_path_script}
ENV.delete 'GEM_HOME'
ENV.delete 'GEM_PATH'
EOF

  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

.lib_path(path) ⇒ Object 



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# File 'lib/embulk.rb', line 5

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|uri:classloader):/
    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

  # upgrade gradle version
  if migrator.match("gradle/wrapper/gradle-wrapper.properties", /gradle-2\.\d-/)
    # gradle < 2.10 (\d matches one digit)
    require 'embulk/data/package_data'
    data = PackageData.new("new", migrator.path)
    migrator.write "gradle/wrapper/gradle-wrapper.properties", data.content("java/gradle/wrapper/gradle-wrapper.properties")
    migrator.write "gradle/wrapper/gradle-wrapper.jar", data.bincontent("java/gradle/wrapper/gradle-wrapper.jar")
  end

  # add jsonColumn method
  if !migrator.match("**/*.java", /void\s+jsonColumn/) && ms = migrator.match("**/*.java", /^(\W+).*?void\s+timestampColumn/)
    indent = ms.first[1]
    replace =  <<EOF

#{indent}public void jsonColumn(Column column) {
#{indent}    throw new UnsupportedOperationException("This plugin doesn't support json type. Please try to upgrade version of the plugin using 'embulk gem update' command. If the latest version still doesn't support json type, please contact plugin developers, or change configuration of input plugin not to use json type.");
#{indent}}

#{indent}@Override
EOF
    migrator.replace("**/*.java", /(\r?\n)(\W+).*?void\s+timestampColumn/, replace)
  end

  # add sourceCompatibility and targetCompatibility
  unless migrator.match("build.gradle", /targetCompatibility/)
    migrator.insert_line("build.gradle", /^([ \t]*)dependencies\s*{/) {|m|
      "#{m[1]}targetCompatibility = 1.7\n"
    }
  end
  unless migrator.match("build.gradle", /sourceCompatibility/)
    migrator.insert_line("build.gradle", /^([ \t]*)targetCompatibility/) {|m|
      "#{m[1]}sourceCompatibility = 1.7"
    }
  end

  # add checkstyle
  unless migrator.match("build.gradle", /id\s+(?<quote>["'])checkstyle\k<quote>/)
    migrator.insert_line("build.gradle", /^([ \t]*)id( +)(["'])java["']/) {|m|
      "#{m[1]}id#{m[2]}#{m[3]}checkstyle#{m[3]}"
    }
    migrator.write "config/checkstyle/checkstyle.xml", migrator.new_data.content("java/config/checkstyle/checkstyle.xml")
  end

  unless migrator.match("build.gradle", /checkstyle\s+{/)
    migrator.write "config/checkstyle/default.xml", migrator.new_data.content("java/config/checkstyle/default.xml")
    migrator.insert_line("build.gradle", /^([ \t]*)task\s+gem\W.*{/) {|m|
      <<-EOF
#{m[1]}checkstyle {
#{m[1]}    configFile = file("${project.rootDir}/config/checkstyle/checkstyle.xml")
#{m[1]}    toolVersion = '6.14.1'
#{m[1]}}
#{m[1]}checkstyleMain {
#{m[1]}    configFile = file("${project.rootDir}/config/checkstyle/default.xml")
#{m[1]}    ignoreFailures = true
#{m[1]}}
#{m[1]}checkstyleTest {
#{m[1]}    configFile = file("${project.rootDir}/config/checkstyle/default.xml")
#{m[1]}    ignoreFailures = true
#{m[1]}}
#{m[1]}task checkstyle(type: Checkstyle) {
#{m[1]}    classpath = sourceSets.main.output + sourceSets.test.output
#{m[1]}    source = sourceSets.main.allJava + sourceSets.test.allJava
#{m[1]}}
EOF
    }
  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].gsub(/\++/, '0'))   # replaces "0.8.+" to "0.8.0"
    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 120

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

  migrator.write(".ruby-version", "jruby-9.0.4.0")

  # 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
    unless migrator.replace("**/*.gemspec", /add_(?:development_)?dependency\s+\W+embulk\W+\s*(\~\>\s*[\d\.]+)\W+/, ">= #{Embulk::VERSION}")
      migrator.replace("**/*.gemspec", /add_(?:development_)?dependency\s+\W+embulk\W+\s*([\d\.]+)\W+/, Embulk::VERSION)
    end
  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 rescue ""
    author = "YOUR_NAME" if author.empty?
    email = `git config user.email`.strip rescue ""
    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("java/config/checkstyle/checkstyle.xml","config/checkstyle/checkstyle.xml")
      pkg.cp("java/config/checkstyle/default.xml","config/checkstyle/default.xml")
      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 20

def self.require_classpath
  if __FILE__.include?("!")
    # single jar. __FILE__ should point path/to/embulk.jar!/embulk.rb
    # which means that embulk.jar is already loaded in this JVM.

  elsif __FILE__ =~ /^(?:classpath|uri:classloader):/
    # already in classpath

  else
    # gem package. __FILE__ should point path/to/embulk/lib/embulk.rb
    # that requires here to load ../classpath/*.jar to start EmbulkEmbed.
    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 PATH', 'Output log messages to a file (default: -)') do |path|
      options[:system_config][:log_path] = path
    end
    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 mkbundle" command)') do |path|
      # only for help message. implemented at lib/embulk/command/embulk_bundle.rb
    end
  end

  case subcmd
  when :run
    op.banner = "Usage: embulk 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', '(deprecated)') do |path|
      STDERR.puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S.%3N %z")}: Run with -o option is deprecated. Please use -c option instead. For example,"
      STDERR.puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S.%3N %z")}: "
      STDERR.puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S.%3N %z")}:   $ embulk run config.yml -c diff.yml"
      STDERR.puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S.%3N %z")}: "
      STDERR.puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S.%3N %z")}: This -c option stores only diff of the next configuration."
      STDERR.puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S.%3N %z")}: The diff will be merged to the original config.yml file."
      STDERR.puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S.%3N %z")}: "
      options[:next_config_output_path] = path
    end
    op.on('-c', '--config-diff PATH', 'Path to a file to read & write the next configuration diff') do |path|
      options[:next_config_diff_path] = path
    end
    plugin_load_ops.call
    java_embed_ops.call
    args = 1..1

  when :cleanup
    op.banner = "Usage: embulk cleanup <config.yml>"
    op.separator "  Options:"
    op.on('-r', '--resume-state PATH', 'Path to a file to cleanup 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: embulk 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: embulk 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 :mkbundle
    op.banner = "Usage: embulk mkbundle <directory> [--path PATH]"
    op.separator "  Options:"
    op.on('--path PATH', 'Relative path from <directory> for the location to install gems to (e.g. --path shared/bundle).') do |path|
      options[:bundle_path] = path
    end
    op.separator <<-EOF

"mkbundle" creates a new a plugin bundle directory. You can install
plugins (gems) to the directory instead of ~/.embulk.

See generated <directory>/Gemfile to install plugins to the directory.
Use -b, --bundle BUNDLE_DIR option to use it:

  $ embulk mkbundle ./dir                # create bundle directory
  $ (cd dir && vi Gemfile && embulk bundle)   # update plugin list
  $ embulk guess -b ./dir ...            # guess using bundled plugins
  $ embulk run   -b ./dir ...            # run using bundled plugins

    EOF
    args = 1..1

  when :bundle
    if argv[0] == 'new'
      usage nil if argv.length != 2
      new_bundle(argv[1], nil)
      STDERR.puts "'embulk bundle new' is deprecated. This will be removed in future release. Please use 'embulk mkbundle' instead."
    else
      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: embulk 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: embulk migrate <directory>"
    args = 1..1

  when :selfupdate
    op.on('-f', "Skip corruption check", TrueClass) do |b|
      options[:force] = true
    end
    args = 0..1

  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, 'seed.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'
    options[:version] = ARGV[0]
    Embulk.selfupdate(options)

  when :mkbundle
    new_bundle(argv[0], options[:bundle_path])

  else
    require 'json'

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

    # call setup after setup_classpaths to allow users to overwrite
    # embulk classes
    Embulk.setup(options.delete(:system_config))

    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_uri = URI.parse(jar).path rescue jar
  unless resource && File.file?(jar_uri)
    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
  jar_path = jar_uri

  if version = options[:version]
    puts "Checking version #{version}..."
    target_version = check_target_version(version)

    unless target_version
      puts "Specified version does not exist: #{version}"
      raise SystemExit.new(1)
    end
    puts "Found version #{target_version}."

  else
    puts "Checking the latest version..."
    target_version = check_latest_version

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

    puts "Found new version #{target_version}."
  end

  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-#{target_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 == target_version
          raise "Embulk::VERSION does not match with #{target_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 #{target_version}."
end

.setup(system_config = {}) ⇒ Object 



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# File 'lib/embulk.rb', line 40

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