Class: Aspera::Cli::Manager

Inherits:
Object
  • Object
show all
Defined in:
lib/aspera/cli/manager.rb

Overview

parse command line options arguments options start with ‘-’, others are commands resolves on extended value syntax

Constant Summary collapse

BOOLEAN_SIMPLE = 
%i[no yes].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(program_name, argv = nil) ⇒ Manager

Returns a new instance of Manager.



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# File 'lib/aspera/cli/manager.rb', line 191

def initialize(program_name, argv = nil)
  # command line values *not* starting with '-'
  @unprocessed_cmd_line_arguments = []
  # command line values starting with '-'
  @unprocessed_cmd_line_options = []
  # a copy of all initial options
  @initial_cli_options = []
  # option description: option_symbol => OptionValue
  @declared_options = {}
  # do we ask missing options and arguments to user ?
  @ask_missing_mandatory = false # STDIN.isatty
  # ask optional options if not provided and in interactive
  @ask_missing_optional = false
  # get_option fails if a mandatory parameter is asked
  @fail_on_missing_mandatory = true
  # Array of [key(sym), value]
  # those must be set before parse
  # parse consumes those defined only
  @option_pairs_batch = {}
  @option_pairs_env = {}
  # NOTE: was initially inherited but it is preferred to have specific methods
  @parser = OptionParser.new
  @parser.program_name = program_name
  # options can also be provided by env vars : --param-name -> ASCLI_PARAM_NAME
  env_prefix = program_name.upcase + OPTION_SEP_SYMBOL
  ENV.each do |k, v|
    @option_pairs_env[k[env_prefix.length..-1].downcase.to_sym] = v if k.start_with?(env_prefix)
  end
  Log.log.debug{"env=#{@option_pairs_env}".red}
  @unprocessed_cmd_line_options = []
  @unprocessed_cmd_line_arguments = []
  return if argv.nil?
  # true until `--` is found (stop options)
  process_options = true
  until argv.empty?
    value = argv.shift
    if process_options && value.start_with?('-')
      Log.log.trace1{"opt: #{value}"}
      if value.eql?(OPTIONS_STOP)
        process_options = false
      else
        @unprocessed_cmd_line_options.push(value)
      end
    else
      Log.log.trace1{"arg: #{value}"}
      @unprocessed_cmd_line_arguments.push(value)
    end
  end
  @initial_cli_options = @unprocessed_cmd_line_options.dup.freeze
  Log.log.trace1{"add_cmd_line_options:commands/arguments=#{@unprocessed_cmd_line_arguments},options=#{@unprocessed_cmd_line_options}".red}
  @parser.separator('')
  @parser.separator('OPTIONS: global')
  declare(:interactive, 'Use interactive input of missing params', allowed: Allowed::TYPES_BOOLEAN, handler: {o: self, m: :ask_missing_mandatory})
  declare(:ask_options, 'Ask even optional options', allowed: Allowed::TYPES_BOOLEAN, handler: {o: self, m: :ask_missing_optional})
  # do not parse options yet, let's wait for option `-h` to be overridden
end

Instance Attribute Details

#ask_missing_mandatory ⇒ Object

Returns the value of attribute ask_missing_mandatory.



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# File 'lib/aspera/cli/manager.rb', line 188

def ask_missing_mandatory
  @ask_missing_mandatory
end

#ask_missing_optional ⇒ Object

Returns the value of attribute ask_missing_optional.



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# File 'lib/aspera/cli/manager.rb', line 188

def ask_missing_optional
  @ask_missing_optional
end

#fail_on_missing_mandatory=(value) ⇒ Object (writeonly)

Sets the attribute fail_on_missing_mandatory

Parameters:

  • value —

    the value to set the attribute fail_on_missing_mandatory to.



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# File 'lib/aspera/cli/manager.rb', line 189

def fail_on_missing_mandatory=(value)
  @fail_on_missing_mandatory = value
end

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/aspera/cli/manager.rb', line 187

def parser
  @parser
end

Class Method Details

.enum_to_bool(enum) ⇒ Object

Returns ‘true` if value is a value for `true` in BOOLEAN_VALUES.

Returns:

  • ‘true` if value is a value for `true` in BOOLEAN_VALUES



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# File 'lib/aspera/cli/manager.rb', line 146

def enum_to_bool(enum)
  Aspera.assert_values(enum, BOOLEAN_VALUES){'boolean'}
  return TRUE_VALUES.include?(enum)
end

.enum_to_yes_no(enum) ⇒ Object

Returns :yes ot :no.

Returns:

  • :yes ot :no



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# File 'lib/aspera/cli/manager.rb', line 152

def enum_to_yes_no(enum)
  Aspera.assert_values(enum, BOOLEAN_VALUES){'boolean'}
  return TRUE_VALUES.include?(enum) ? BOOL_YES : BOOL_NO
end

.get_from_list(short_value, descr, allowed_values) ⇒ Object

Find shortened string value in allowed symbol list



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# File 'lib/aspera/cli/manager.rb', line 158

def get_from_list(short_value, descr, allowed_values)
  Aspera.assert_type(short_value, String)
  # we accept shortcuts
  matching_exact = allowed_values.select{ |i| i.to_s.eql?(short_value)}
  return matching_exact.first if matching_exact.length == 1
  matching = allowed_values.select{ |i| i.to_s.start_with?(short_value)}
  Aspera.assert(!matching.empty?, multi_choice_assert_msg("unknown value for #{descr}: #{short_value}", allowed_values), type: BadArgument)
  Aspera.assert(matching.length.eql?(1), multi_choice_assert_msg("ambiguous shortcut for #{descr}: #{short_value}", matching), type: BadArgument)
  return enum_to_bool(matching.first) if allowed_values.eql?(BOOLEAN_VALUES)
  return matching.first
end

.multi_choice_assert_msg(error_msg, accept_list) ⇒ Object

Generates error message with list of allowed values

Parameters:

  • error_msg (String) —

    error message

  • accept_list (Array) —

    list of allowed values



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# File 'lib/aspera/cli/manager.rb', line 173

def multi_choice_assert_msg(error_msg, accept_list)
  [error_msg, 'Use:'].concat(accept_list.map{ |c| "- #{c}"}.sort).join("\n")
end

.option_line_to_name(name) ⇒ Object

change option name with dash to name with underscore



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# File 'lib/aspera/cli/manager.rb', line 178

def option_line_to_name(name)
  return name.gsub(OPTION_SEP_LINE, OPTION_SEP_SYMBOL)
end

.option_name_to_line(name) ⇒ Object 



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# File 'lib/aspera/cli/manager.rb', line 182

def option_name_to_line(name)
  return "#{OPTION_PREFIX}#{name.to_s.gsub(OPTION_SEP_SYMBOL, OPTION_SEP_LINE)}"
end

Instance Method Details

#add_option_preset(preset_hash, where, override: true) ⇒ Object

Adds each of the keys of specified hash as an option

Parameters:

  • preset_hash (Hash) —

    Options to add

  • where (String) —

    Where the value comes from

  • override (Boolean) (defaults to: true) —

    Override if already present



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# File 'lib/aspera/cli/manager.rb', line 409

def add_option_preset(preset_hash, where, override: true)
  Aspera.assert_type(preset_hash, Hash)
  Log.log.debug{"add_option_preset: #{preset_hash}, #{where}, #{override}"}
  preset_hash.each do |k, v|
    option_symbol = k.to_sym
    @option_pairs_batch[option_symbol] = v if override || !@option_pairs_batch.key?(option_symbol)
  end
end

#args_as_extended(value) ⇒ Object

Read remaining args and build an Array or Hash

Parameters:

  • value (nil) —

    Argument to ‘@:` extended value



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# File 'lib/aspera/cli/manager.rb', line 564

def args_as_extended(value)
  # This extended value does not take args (`@:`)
  ExtendedValue.assert_no_value(value, :p)
  result = nil
  get_next_argument(:args, multiple: true).each do |arg|
    Aspera.assert(arg.include?(OPTION_VALUE_SEPARATOR)){"Positional argument: #{arg} does not inlude #{OPTION_VALUE_SEPARATOR}"}
    path, raw = arg.split(OPTION_VALUE_SEPARATOR, 2)
    result = dotted_to_extended(path, raw, result)
  end
  result
end

#clear_option(option_symbol) ⇒ Object

Set option to ‘nil`



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# File 'lib/aspera/cli/manager.rb', line 399

def clear_option(option_symbol)
  Aspera.assert_type(option_symbol, Symbol)
  Aspera.assert(@declared_options.key?(option_symbol), type: Cli::BadArgument){"Unknown option: #{option_symbol}"}
  @declared_options[option_symbol].clear
end

#command_or_arg_empty? ⇒ Boolean

Check if there were unprocessed values to generate error

Returns:

  • (Boolean) 


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# File 'lib/aspera/cli/manager.rb', line 424

def command_or_arg_empty?
  return @unprocessed_cmd_line_arguments.empty?
end

#declare(option_symbol, description, short: nil, allowed: nil, default: nil, handler: nil, deprecation: nil, &block) ⇒ Object

Declare an option

Parameters:

  • option_symbol (Symbol) —

    option name

  • description (String) —

    description for help

  • short (String) (defaults to: nil) —

    short option name

  • allowed (Object) (defaults to: nil) —

    Allowed values, see ‘OptionValue`

  • default (Object) (defaults to: nil) —

    default value

  • handler (Hash) (defaults to: nil) —

    handler for option value: keys: :o(object) and :m(method)

  • deprecation (String) (defaults to: nil) —

    deprecation

  • block (Proc) —

    Block to execute when option is found



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# File 'lib/aspera/cli/manager.rb', line 257

def declare(option_symbol, description, short: nil, allowed: nil, default: nil, handler: nil, deprecation: nil, &block)
  Aspera.assert_type(option_symbol, Symbol)
  Aspera.assert(!@declared_options.key?(option_symbol)){"#{option_symbol} already declared"}
  Aspera.assert(description[-1] != '.'){"#{option_symbol} ends with dot"}
  Aspera.assert(description[0] == description[0].upcase){"#{option_symbol} description does not start with an uppercase"}
  Aspera.assert(!['hash', 'extended value'].any?{ |s| description.downcase.include?(s)}){"#{option_symbol} shall use :allowed"}
  Aspera.assert_type(handler, Hash) if handler
  Aspera.assert(handler.keys.sort.eql?(%i[m o])) if handler
  option_attrs = @declared_options[option_symbol] = OptionValue.new(
    option:      option_symbol,
    description: description,
    allowed:     allowed,
    handler:     handler,
    deprecation: deprecation
  )
  real_types = option_attrs.types&.reject{ |i| [NilClass, String, Symbol].include?(i)}
  description = "#{description} (#{real_types.map(&:name).join(', ')})" if real_types && !real_types.empty? && !real_types.eql?(Allowed::TYPES_ENUM) && !real_types.eql?(Allowed::TYPES_BOOLEAN) && !real_types.eql?(Allowed::TYPES_STRING)
  description = "#{description} (#{'deprecated'.blue}: #{deprecation})" if deprecation
  set_option(option_symbol, default, where: 'default') unless default.nil?
  on_args = [description]
  case option_attrs.types
  when Allowed::TYPES_ENUM, Allowed::TYPES_BOOLEAN
    # This option value must be a symbol (or array of symbols)
    set_option(option_symbol, Manager.enum_to_bool(default), where: 'default') if option_attrs.values.eql?(BOOLEAN_VALUES) && !default.nil?
    value = get_option(option_symbol)
    help_values =
      if option_attrs.types.eql?(Allowed::TYPES_BOOLEAN)
        highlight_current_in_list(BOOLEAN_SIMPLE, self.class.enum_to_yes_no(value))
      else
        highlight_current_in_list(option_attrs.values, value)
      end
    on_args[0] = "#{description}: #{help_values}"
    on_args.push(symbol_to_option(option_symbol, 'ENUM'))
    # on_args.push(option_attrs.values)
    @parser.on(*on_args) do |v|
      set_option(option_symbol, self.class.get_from_list(v.to_s, description, option_attrs.values), where: SOURCE_USER)
    end
  when Allowed::TYPES_NONE
    Aspera.assert_type(block, Proc){"missing execution block for #{option_symbol}"}
    on_args.push(symbol_to_option(option_symbol))
    on_args.push("-#{short}") if short.is_a?(String)
    @parser.on(*on_args, &block)
  else
    on_args.push(symbol_to_option(option_symbol, 'VALUE'))
    on_args.push("-#{short}VALUE") unless short.nil?
    # coerce integer
    on_args.push(Integer) if option_attrs.types.eql?(Allowed::TYPES_INTEGER)
    @parser.on(*on_args) do |v|
      set_option(option_symbol, v, where: SOURCE_USER)
    end
  end
  Log.log.trace1{"on_args=#{on_args}"}
end

#final_errors ⇒ Object

Unprocessed options or arguments ?



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# File 'lib/aspera/cli/manager.rb', line 429

def final_errors
  result = []
  result.push("unprocessed options: #{@unprocessed_cmd_line_options}") unless @unprocessed_cmd_line_options.empty?
  result.push("unprocessed values: #{@unprocessed_cmd_line_arguments}") unless @unprocessed_cmd_line_arguments.empty?
  return result
end

#get_interactive(descr, check_option: false, multiple: false, accept_list: nil) ⇒ Object

Prompt user for input in a list of symbols

Parameters:

  • descr (String) —

    description for help

  • check_option (Boolean) (defaults to: false) —

    Check attributes of option with name=descr

  • multiple (Boolean) (defaults to: false) —

    true if multiple values expected

  • accept_list (Array) (defaults to: nil) —

    list of expected values



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# File 'lib/aspera/cli/manager.rb', line 534

def get_interactive(descr, check_option: false, multiple: false, accept_list: nil)
  option_attrs = @declared_options[descr.to_sym]
  what = option_attrs ? 'option' : 'argument'
  if !@ask_missing_mandatory
    message = "missing #{what}: #{descr}"
    if accept_list.nil?
      raise Cli::BadArgument, message
    else
      Aspera.assert(false, self.class.multi_choice_assert_msg(message, accept_list), type: Cli::MissingArgument)
    end
  end
  default_prompt = "#{what}: #{descr}"
  # ask interactively
  result = []
  puts(' (one per line, end with empty line)') if multiple
  loop do
    prompt = default_prompt
    prompt = "#{accept_list.join(' ')}\n#{default_prompt}" if accept_list
    entry = prompt_user_input(prompt, sensitive: option_attrs&.sensitive)
    break if entry.empty? && multiple
    entry = ExtendedValue.instance.evaluate(entry, context: 'interactive input')
    entry = self.class.get_from_list(entry, descr, accept_list) if accept_list
    return entry unless multiple
    result.push(entry)
  end
  return result
end

#get_next_argument(descr, mandatory: true, multiple: false, accept_list: nil, validation: Allowed::TYPES_STRING, aliases: nil, default: nil) ⇒ Object

Returns one value, list or nil (if optional and no default).

Parameters:

  • descr (String) —

    description for help

  • mandatory (Boolean) (defaults to: true) —

    if true, raise error if option not set

  • multiple (Boolean) (defaults to: false) —

    if true, return remaining arguments (Array)

  • accept_list (Array, NilClass) (defaults to: nil) —

    list of allowed values (Symbol)

  • validation (Class, Array, NilClass) (defaults to: Allowed::TYPES_STRING) —

    Accepted value type(s) or list of Symbols

  • aliases (Hash) (defaults to: nil) —

    map of aliases: key = alias, value = real value

  • default (Object) (defaults to: nil) —

    default value

Returns:

  • one value, list or nil (if optional and no default)



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# File 'lib/aspera/cli/manager.rb', line 319

def get_next_argument(descr, mandatory: true, multiple: false, accept_list: nil, validation: Allowed::TYPES_STRING, aliases: nil, default: nil)
  Aspera.assert_array_all(accept_list, Symbol) unless accept_list.nil?
  Aspera.assert_hash_all(aliases, Symbol, Symbol) unless aliases.nil?
  validation = Symbol unless accept_list.nil?
  validation = [validation] unless validation.is_a?(Array) || validation.nil?
  Aspera.assert_array_all(validation, Class){'validation'} unless validation.nil?
  descr = "#{descr} (#{validation.join(', ')})" unless validation.nil? || validation.eql?(Allowed::TYPES_STRING)
  result =
    if !@unprocessed_cmd_line_arguments.empty?
      how_many = multiple ? @unprocessed_cmd_line_arguments.length : 1
      values = @unprocessed_cmd_line_arguments.shift(how_many)
      values = values.map{ |v| ExtendedValue.instance.evaluate(v, context: "argument: #{descr}", allowed: validation)}
      # if expecting list and only one arg of type array : it is the list
      values = values.first if multiple && values.length.eql?(1) && values.first.is_a?(Array)
      if accept_list
        allowed_values = [].concat(accept_list)
        allowed_values.concat(aliases.keys) unless aliases.nil?
        values = values.map{ |v| self.class.get_from_list(v, descr, allowed_values)}
      end
      multiple ? values : values.first
    elsif !default.nil? then default
      # no value provided, either get value interactively, or exception
    elsif mandatory then get_interactive(descr, multiple: multiple, accept_list: accept_list)
    end
  if result.is_a?(String) && validation&.eql?(Allowed::TYPES_INTEGER)
    int_result = Integer(result, exception: false)
    raise Cli::BadArgument, "Invalid integer: #{result}" if int_result.nil?
    result = int_result
  end
  Log.log.debug{"#{descr}=#{result}"}
  result = aliases[result] if aliases&.key?(result)
  # if value comes from JSON/YAML, it may come as Integer
  result = result.to_s if result.is_a?(Integer) && validation&.eql?(Allowed::TYPES_STRING)
  if validation && (mandatory || !result.nil?)
    value_list = multiple ? result : [result]
    value_list.each do |value|
      raise Cli::BadArgument,
        "Argument #{descr} is a #{value.class} but must be #{'one of: ' if validation.length > 1}#{validation.map(&:name).join(', ')}" unless validation.any?{ |t| value.is_a?(t)}
    end
  end
  return result
end

#get_next_command(command_list, aliases: nil) ⇒ Object 



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# File 'lib/aspera/cli/manager.rb', line 362

def get_next_command(command_list, aliases: nil); return get_next_argument('command', accept_list: command_list, aliases: aliases); end

#get_option(option_symbol, mandatory: false) ⇒ Object

Get an option value by name either return value or calls handler, can return nil ask interactively if requested/required

Parameters:

  • mandatory (Boolean) (defaults to: false) —

    if true, raise error if option not set



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# File 'lib/aspera/cli/manager.rb', line 368

def get_option(option_symbol, mandatory: false)
  Aspera.assert_type(option_symbol, Symbol)
  Aspera.assert(@declared_options.key?(option_symbol), type: Cli::BadArgument){"Unknown option: #{option_symbol}"}
  option_attrs = @declared_options[option_symbol]
  result = option_attrs.value
  # Do not fail for manual generation if option mandatory but not set
  return :skip_missing_mandatory if result.nil? && mandatory && !@fail_on_missing_mandatory
  if result.nil?
    if !@ask_missing_mandatory
      Aspera.assert(!mandatory, type: Cli::BadArgument){"Missing mandatory option: #{option_symbol}"}
    elsif @ask_missing_optional || mandatory
      # ask_missing_mandatory
      result = get_interactive(option_symbol.to_s, check_option: true, accept_list: option_attrs.values)
      set_option(option_symbol, result, where: 'interactive')
    end
  end
  return result
end

#known_options(only_defined: false) ⇒ Hash

Returns options as taken from config file and command line just before command execution.

Parameters:

  • only_defined (Boolean) (defaults to: false) —

    if true, only return options that were defined

Returns:

  • (Hash) —

    options as taken from config file and command line just before command execution



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# File 'lib/aspera/cli/manager.rb', line 461

def known_options(only_defined: false)
  result = {}
  @declared_options.each_key do |option_symbol|
    v = get_option(option_symbol)
    result[option_symbol] = v unless only_defined && v.nil?
  rescue => e
    result[option_symbol] = e.to_s
  end
  return result
end

#parse_options! ⇒ Object

Removes already known options from the list



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# File 'lib/aspera/cli/manager.rb', line 473

def parse_options!
  Log.log.trace1('parse_options!'.red)
  # First options from conf file
  consume_option_pairs(@option_pairs_batch, 'set')
  # Then, env var (to override)
  consume_option_pairs(@option_pairs_env, 'env')
  # Then, command line override
  unknown_options = []
  begin
    # remove known options one by one, exception if unknown
    Log.log.trace1('Before parse')
    Log.dump(:unprocessed_cmd_line_options, @unprocessed_cmd_line_options)
    @parser.parse!(@unprocessed_cmd_line_options)
    Log.log.trace1('After parse')
  rescue OptionParser::InvalidOption => e
    Log.log.trace1{"InvalidOption #{e}".red}
    if (m = e.args.first.match(/^--([a-z\-]+)\.([^=]+)=(.+)$/))
      option, path, value = m.captures
      option_sym = self.class.option_line_to_name(option).to_sym
      if @declared_options.key?(option_sym)
        set_option(option_sym, dotted_to_extended(path, value), where: 'dotted')
        retry
      end
    end
    # save for later processing
    unknown_options.push(e.args.first)
    retry
  end
  Log.log.trace1{"remains: #{unknown_options}"}
  # set unprocessed options for next time
  @unprocessed_cmd_line_options = unknown_options
end

#prompt_user_input(prompt, sensitive: false) ⇒ Object 



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# File 'lib/aspera/cli/manager.rb', line 506

def prompt_user_input(prompt, sensitive: false)
  return $stdin.getpass("#{prompt}> ") if sensitive
  print("#{prompt}> ")
  line = $stdin.gets
  Aspera.assert_type(line, String){'Unexpected end of standard input'}
  return line.chomp
end

#prompt_user_input_in_list(prompt, sym_list) ⇒ Symbol

prompt user for input in a list of symbols

Parameters:

  • prompt (String) —

    prompt to display

  • sym_list (Array) —

    list of symbols to select from

Returns:

  • (Symbol) —

    selected symbol



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# File 'lib/aspera/cli/manager.rb', line 518

def prompt_user_input_in_list(prompt, sym_list)
  loop do
    input = prompt_user_input(prompt).to_sym
    if sym_list.any?{ |a| a.eql?(input)}
      return input
    else
      $stderr.puts("No such #{prompt}: #{input}, select one of: #{sym_list.join(', ')}") # rubocop:disable Style/StderrPuts
    end
  end
end

#set_option(option_symbol, value, where: 'code override') ⇒ Object

Set an option value by name, either store value or call handler String is given to extended value

Parameters:

  • option_symbol (Symbol) —

    option name

  • value (String) —

    Value to set

  • where (String) (defaults to: 'code override') —

    Where the value comes from



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# File 'lib/aspera/cli/manager.rb', line 392

def set_option(option_symbol, value, where: 'code override')
  Aspera.assert_type(option_symbol, Symbol)
  Aspera.assert(@declared_options.key?(option_symbol), type: Cli::BadArgument){"Unknown option: #{option_symbol}"}
  @declared_options[option_symbol].assign_value(value, where: where)
end

#unprocessed_options_with_value ⇒ Hash

Get all original options on command line used to generate a config in config file

Returns:

  • (Hash) —

    options as taken from config file and command line just before command execution



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# File 'lib/aspera/cli/manager.rb', line 438

def unprocessed_options_with_value
  result = {}
  @initial_cli_options.each do |option_value|
    case option_value
    when /^#{OPTION_PREFIX}([^=]+)$/o
      # ignore
    when /^#{OPTION_PREFIX}([^=]+)=(.*)$/o
      name = Regexp.last_match(1)
      value = Regexp.last_match(2)
      name.gsub!(OPTION_SEP_LINE, OPTION_SEP_SYMBOL)
      value = ExtendedValue.instance.evaluate(value, context: "option: #{name}")
      Log.log.debug{"option #{name}=#{value}"}
      result[name] = value
      @unprocessed_cmd_line_options.delete(option_value)
    else
      raise Cli::BadArgument, "wrong option format: #{option_value}"
    end
  end
  return result
end

#unshift_next_argument(argument) ⇒ Object

Allows a plugin to add an argument as next argument to process



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# File 'lib/aspera/cli/manager.rb', line 419

def unshift_next_argument(argument)
  @unprocessed_cmd_line_arguments.unshift(argument)
end