Class: Benry::CmdOpt::Schema

Inherits:
Object
  • Object
show all
Defined in:
lib/benry/cmdopt.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Schema

Returns a new instance of Schema.



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# File 'lib/benry/cmdopt.rb', line 85

def initialize()
  @items = []
end

Instance Method Details

#add(key, optdef, desc, *rest, type: nil, rexp: nil, pattern: nil, enum: nil, range: nil, value: nil, detail: nil, tag: nil, &callback) ⇒ Object 



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# File 'lib/benry/cmdopt.rb', line 106

def add(key, optdef, desc, *rest, type: nil, rexp: nil, pattern: nil, enum: nil, range: nil, value: nil, detail: nil, tag: nil, &callback)
  rexp ||= pattern    # for backward compatibility
  #; [!kuhf9] type, rexp, enum, and range are can be passed as positional args as well as keyword args.
  rest.each do |x|
    case x
    when Class      ; type ||= x
    when Regexp     ; rexp ||= x
    when Array, Set ; enum ||= x
    when Range      ; range ||= x
    else
      #; [!e3emy] raises error when positional arg is not one of class, regexp, array, nor range.
      raise _error("#{x.inspect}: Expected one of class, regexp, array or range, but got #{x.class.name}.")
    end
  end
  #; [!rhhji] raises SchemaError when key is not a Symbol.
  key.nil? || key.is_a?(Symbol)  or
    raise _error("add(#{key.inspect}, #{optdef.inspect}): The first arg should be a Symbol as an option key.")
  #; [!vq6eq] raises SchemaError when help message is missing."
  desc.nil? || desc.is_a?(String)  or
    raise _error("add(#{key.inspect}, #{optdef.inspect}): Help message required as 3rd argument.")
  #; [!7hi2d] takes command option definition string.
  short, long, param, required = parse_optdef(optdef)
  #; [!p9924] option key is omittable only when long option specified.
  #; [!jtp7z] raises SchemaError when key is nil and no long option.
  key || long  or
    raise _error("add(#{key.inspect}, #{optdef.inspect}): Long option required when option key (1st arg) not specified.")
  #; [!rpl98] when long option is 'foo-bar' then key name is ':foo_bar'.
  key ||= long.gsub(/-/, '_').intern
  #; [!97sn0] raises SchemaError when ',' is missing between short and long options.
  if long.nil? && param =~ /\A--/
    raise _error("add(#{key.inspect}, #{optdef.inspect}): Missing ',' between short option and long options.")
  end
  #; [!yht0v] keeps command option definitions.
  item = SchemaItem.new(key, optdef, desc, short, long, param, required,
             type: type, rexp: rexp, enum: enum, range: range, value: value, detail: detail, tag: tag, &callback)
  @items << item
  item
end

#copy_from(other, except: []) ⇒ Object 



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# File 'lib/benry/cmdopt.rb', line 96

def copy_from(other, except: [])
  #; [!6six3] copy schema items from others.
  #; [!vt88s] copy schema items except items specified by 'except:' kwarg.
  except = [except].flatten()
  other.each do |item|
    @items << item unless except.include?(item.key)
  end
  self
end

#delete(key) ⇒ Object 



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# File 'lib/benry/cmdopt.rb', line 209

def delete(key)
  #; [!l86rb] deletes option item corresponding to key.
  #; [!rq0aa] returns deleted item.
  item = get(key)
  @items.delete_if {|item| item.key == key }
  return item
end

#dup ⇒ Object 



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# File 'lib/benry/cmdopt.rb', line 89

def dup()
  #; [!lxb0o] copies self object.
  other = self.class.new
  other.instance_variable_set(:@items, @items.dup)
  return other
end

#each(&block) ⇒ Object

:nodoc:



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# File 'lib/benry/cmdopt.rb', line 191

def each(&block)   # :nodoc:
  #; [!y4k1c] yields each option item.
  @items.each(&block)
end

#each_option_and_desc(all: false, &block) ⇒ Object Also known as: each_option_help 



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# File 'lib/benry/cmdopt.rb', line 177

def each_option_and_desc(all: false, &block)
  #; [!03sux] returns enumerator object if block not given.
  return to_enum(:each_option_and_desc, all: all) unless block_given?()
  #; [!4b911] yields each optin definition str and help message.
  @items.each do |item|
    #; [!cl8zy] when 'all' flag is false, not yield hidden items.
    #; [!tc4bk] when 'all' flag is true, yields even hidden items.
    yield item.optdef, item.desc, item.detail if all || ! item.hidden?
  end
  #; [!zbxyv] returns self.
  self
end

#empty?(all: true) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/benry/cmdopt.rb', line 196

def empty?(all: true)
  #; [!um8am] returns false if any item exists, else returns true.
  #; [!icvm1] ignores hidden items if 'all: false' kwarg specified.
  @items.each {|item| return false if all || ! item.hidden? }
  return true
end

#find_long_option(long) ⇒ Object 



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# File 'lib/benry/cmdopt.rb', line 223

def find_long_option(long)
  #; [!atmf9] returns option definition matched to long name.
  #; [!6haoo] returns nil when nothing found.
  return @items.find {|item| item.long == long }
end

#find_short_option(short) ⇒ Object 



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# File 'lib/benry/cmdopt.rb', line 217

def find_short_option(short)
  #; [!b4js1] returns option definition matched to short name.
  #; [!s4d1y] returns nil when nothing found.
  return @items.find {|item| item.short == short }
end

#get(key) ⇒ Object 



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# File 'lib/benry/cmdopt.rb', line 203

def get(key)
  #; [!3wjfp] finds option item object by key.
  #; [!0spll] returns nil if key not found.
  return @items.find {|item| item.key == key }
end

#option_help(width_or_format = nil, all: false) ⇒ Object Also known as: to_s 



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# File 'lib/benry/cmdopt.rb', line 145

def option_help(width_or_format=nil, all: false)
  #; [!0aq0i] can take integer as width.
  #; [!pcsah] can take format string.
  #; [!dndpd] detects option width automatically when nothing specified.
  case width_or_format
  when nil    ; format = _default_format()
  when Integer; format = "  %-#{width_or_format}s : %s"
  when String ; format = width_or_format
  else
    raise ArgumentError.new("#{width_or_format.inspect}: Width (integer) or format (string) expected.")
  end
  #; [!v7z4x] skips option help if help message is not specified.
  #; [!to1th] includes all option help when `all` is true.
  #; [!a4qe4] option should not be hidden if description is empty string.
  sb = []
  width = nil; indent = nil
  each_option_and_desc(all: all) do |opt, desc, detail|
    sb << format % [opt, desc || ""] << "\n"
    #; [!848rm] supports multi-lines help message.
    if detail
      width  ||= (format % ['', '']).length
      indent ||= ' ' * width
      sb << detail.gsub(/^/, indent)
      sb << "\n" unless detail.end_with?("\n")
    end
  end
  return sb.join()
end