Class: Morpheus::Cli::CliRegistry

Inherits:
Object
  • Object
show all
Extended by:
Term::ANSIColor
Defined in:
lib/morpheus/cli/cli_registry.rb

Defined Under Namespace

Classes: BadAlias, BadCommandDefinition

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CliRegistry

Returns a new instance of CliRegistry.



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# File 'lib/morpheus/cli/cli_registry.rb', line 19

def initialize
  @commands = {} # this is command => Class that includes ::CliCommand
  @aliases = {} # this is alias => String full input string
end

Class Method Details

.add(klass, command_name = nil) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 203

def add(klass, command_name=nil)
  klass_command_name = cli_ize(klass.name.split('::')[-1])
  if has_command?(klass_command_name)
    instance.remove(klass_command_name)
  end
  command_name ||= klass_command_name
  instance.add(command_name, klass)
end

.all ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 228

def all
  instance.all
end

.all_aliases ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 232

def all_aliases
  instance.all_aliases
end

.cached_command_list ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 294

def cached_command_list
  @cached_command_list ||= (all.keys + all_aliases.keys).collect { |it| it.to_s }.sort
end

.clear_cached_command_list ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 298

def clear_cached_command_list
  @cached_command_list = nil
end

.cli_ize(klass_name) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 236

def cli_ize(klass_name)
  # borrowed from ActiveSupport
  return klass_name unless klass_name =~ /[A-Z-]|::/
  word = klass_name.to_s.gsub(/::/, '/')
  word.gsub!(/(?:(?<=([A-Za-z\d]))|\b)(?=\b|[^a-z])/) { "#{$1 && '_'}" }
  word.gsub!(/([A-Z\d]+)([A-Z][a-z])/,'\1_\2')
  word.gsub!(/([a-z\d])([A-Z])/,'\1_\2')
  word.tr!("-", "_")
  word.downcase!
  word.chop.tr('_', '-')
end

.exec(command_name, args) ⇒ Object

todo: move execution out of the CliRegistry



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# File 'lib/morpheus/cli/cli_registry.rb', line 75

def exec(command_name, args)
  exec_command(command_name, args)
end

.exec_alias(alias_name, args) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 113

def exec_alias(alias_name, args)
  found_alias_command = instance.get_alias(alias_name)
  if !found_alias_command
    raise Morpheus::Cli::CommandError.new("'#{alias_name}' is not a defined alias.")
  end
  # if !is_valid_expression(found_alias_command)
  #   raise Morpheus::Cli::CommandError.new("alias '#{alias_name}' is not a valid expression: #{found_alias_command}")
  # end
  input = found_alias_command
  if args && !args.empty?
    input = "#{found_alias_command} " + args.collect {|arg| arg.include?(" ") ? "\"#{arg}\"" : "#{arg}" }.join(" ")
  end
  exec_expression(input)
end

.exec_command(command_name, args) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 79

def exec_command(command_name, args)
  #puts "exec_command(#{command_name}, #{args})"
  result = nil
  if has_alias?(command_name)
    result = exec_alias(command_name, args)
  elsif has_command?(command_name)
    begin
      result = instance.get(command_name).new.handle(args)
    rescue SystemExit => e
      result = Morpheus::Cli::ErrorHandler.new(Morpheus::Terminal.instance.stderr).handle_error(e) # lol
    rescue => e
      result = Morpheus::Cli::ErrorHandler.new(Morpheus::Terminal.instance.stderr).handle_error(e) # lol
    end
  else
    # todo: need to just return error instead of raise
    msg = "'#{command_name}' is not a morpheus command."
    suggestions = find_command_suggestions(command_name)
    if suggestions && suggestions.size == 1
      msg += "\nThe most similar command is:\n"
      suggestions.first(5).each do |suggestion|
        msg += "\t" + suggestion + "\n"
      end
    elsif suggestions && suggestions.size > 1
      msg += "\nThe most similar commands are:\n"
      suggestions.first(5).each do |suggestion|
        msg += "\t" + suggestion + "\n"
      end
    end
    #raise CommandNotFoundError.new(msg)
    result = Morpheus::Cli::ErrorHandler.new(Morpheus::Terminal.instance.stderr).handle_error(CommandNotFoundError.new(msg)) # lol
  end
  return result
end

.exec_expression(input) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 128

def exec_expression(input)
  # puts "exec_expression(#{input})"
  flow = input
  if input.is_a?(String)
    begin
      flow = Morpheus::Cli::ExpressionParser.parse(input)
    rescue Morpheus::Cli::ExpressionParser::InvalidExpression => e
      raise e
    end
  end
  # puts "executing flow: #{flow.inspect}"
  final_command_result = nil
  if flow.size == 0
    # no input eh?
  else
    last_command_result = nil
    if ['&&','||', '|'].include?(flow.first)
      raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "#{Morpheus::Terminal.angry_prompt}invalid command format, begins with an operator: #{input}"
    elsif ['&&','||', '|'].include?(flow.last)
      raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "#{Morpheus::Terminal.angry_prompt}invalid command format, ends with an operator: #{input}"
    # elsif ['&&','||', '|'].include?(flow.last)
    #   raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "invalid command format, consecutive operators: #{cmd}"
    else
      #Morpheus::Logging::DarkPrinter.puts "Executing command flow: #{flow.inspect}" if Morpheus::Logging.debug?
      previous_command = nil
      previous_command_result = nil
      current_operator = nil
      still_executing = true
      # need to error before executing anything, could be dangerous otherwise!
      # also maybe only pass flow commands if they have a space on either side..
      if flow.include?("|")
        raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "The PIPE (|) operator is not yet supported. You can wrap your arguments in quotations."
      end
      flow.each do |flow_cmd|
        if still_executing
          if flow_cmd == '&&'
            # AND operator
            current_operator = flow_cmd
            exit_code, cmd_err = parse_command_result(previous_command_result)
            if exit_code != 0
              still_executing = false
            end
          elsif flow_cmd == '||' # or with previous command
            current_operator = flow_cmd
            exit_code, err = parse_command_result(previous_command_result)
            if exit_code == 0
              still_executing = false
            end
          elsif flow_cmd == '|' # or with previous command
            # todo, handle pipe!
            raise Morpheus::Cli::ExpressionParser::InvalidExpression.new "The PIPE (|) operator is not yet supported. You can wrap your arguments in quotations."
            previous_command_result = nil
            still_executing = false
            # or just continue?
          elsif flow_cmd.is_a?(Array)
            # this is a subexpression, execute it as such
            current_operator = nil
            previous_command_result = exec_expression(flow_cmd)
          else # it's a command, not an operator
            current_operator = nil
            flow_argv = Shellwords.shellsplit(flow_cmd)
            previous_command_result = exec_command(flow_argv[0], flow_argv[1..-1])
          end
          previous_command = flow_cmd
        else
          #Morpheus::Logging::DarkPrinter.puts "operator skipped command: #{flow_cmd}" if Morpheus::Logging.debug?
        end
        # previous_command = flow_cmd
      end
      final_command_result = previous_command_result
    end
  end
  return final_command_result
end

.find_command_suggestions(command_name) ⇒ Object

find suggested commands (or aliases) for a name that was not found First this looks for the plural of the original guess Then pop characters off the end looking for partial matches as long as the guess is at least 3 characters



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# File 'lib/morpheus/cli/cli_registry.rb', line 306

def find_command_suggestions(command_name)
  every_command = cached_command_list
  guess = command_name
  suggestions = []
  while suggestions.empty? && guess.size >= 3
    plural_guess = guess.pluralize
    if every_command.include?(guess)
      suggestions << guess
    end
    if every_command.include?(plural_guess)
      suggestions << plural_guess
    end
    # if every_command.include?(guess)
    #   suggestions << plural_guess
    # else
      guess_regexp = /^#{Regexp.escape(guess)}/i
      every_command.each do |it|
        if it =~ guess_regexp
          suggestions << it
        end
      end
    # end
    guess = guess[0..-2]
  end
  suggestions.uniq!
  suggestions.sort! { |x,y| [x.split('-').size, x] <=> [y.split('-').size, y] }
  return suggestions
end

.has_alias?(alias_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/morpheus/cli/cli_registry.rb', line 220

def has_alias?(alias_name)
  if alias_name.nil? || alias_name == ''
    false
  else
    !instance.get_alias(alias_name).nil?
  end
end

.has_command?(command_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/morpheus/cli/cli_registry.rb', line 212

def has_command?(command_name)
  if command_name.nil? || command_name == ''
    false
  else
    !instance.get(command_name).nil?
  end
end

.instance ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 70

def instance
  @instance ||= CliRegistry.new
end

.parse_alias_definition(input) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 248

def parse_alias_definition(input)
  # todo: one multi group regex would work
  alias_name, command_string = nil, nil
  chunks = input.to_s.sub(/^alias\s+/, "").split('=')
  alias_name = chunks.shift
  command_string = chunks.compact.reject {|it| it.empty? }.join('=')
  command_string = command_string.strip.sub(/^'/, "").sub(/'\Z/, "").strip
  return alias_name, command_string
end

.parse_command_result(cmd_result) ⇒ Array

parse any object into a command result [exit_code, error] 0 means success. This treats nil, true, or an object as success ie. [0, nil] and false is treated as an error [1, error]

Returns:

  • (Array) —

    [exit_code, error]. Success returns [0, nil].



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# File 'lib/morpheus/cli/cli_registry.rb', line 263

def parse_command_result(cmd_result)
  exit_code, error = nil, nil
  if cmd_result.is_a?(Array)
    exit_code = cmd_result[0] || 0
    error = cmd_result[1]
  elsif cmd_result.is_a?(Hash)
    exit_code = cmd_result[:exit_code] || 0
    error = cmd_result[:error] || cmd_result[:err]
  elsif cmd_result == nil || cmd_result == true
    exit_code = 0
  elsif cmd_result == false
    exit_code = 1
  elsif cmd_result.is_a?(Integer)
    exit_code = cmd_result
  elsif cmd_result.is_a?(Float)
    exit_code = cmd_result.to_i
  elsif cmd_result.is_a?(String)
    exit_code = cmd_result.to_i
  else
    if cmd_result.respond_to?(:to_i)
      exit_code = cmd_result.to_i
    else
      # happens for aliases right now.. and execution flow probably, need to handle Array
      # uncomment to track them down, proceed with exit 0 for now
      #Morpheus::Logging::DarkPrinter.puts "debug: command #{command_name} produced an unexpected result: (#{cmd_result.class}) #{cmd_result}" if Morpheus::Logging.debug?
      exit_code = 0
    end
  end
  return exit_code, error
end

Instance Method Details

#add(cmd_name, klass) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 37

def add(cmd_name, klass)
  @commands[cmd_name.to_sym] = klass
end

#add_alias(alias_name, command_string) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 53

def add_alias(alias_name, command_string)
  #return @commands[alias_name.to_sym]
  if self.class.has_command?(alias_name)
    raise BadAlias.new "alias name '#{alias_name}' is invalid. That is the name of a morpheus command."
  elsif alias_name.to_s.downcase.strip == command_string.to_s.downcase.strip
    raise BadAlias.new "alias #{alias_name}=#{command_string} is invalid..."
  end
  @aliases[alias_name.to_sym] = command_string
end

#all ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 29

def all
  @commands.reject {|cmd, klass| klass.hidden_command }
end

#all_aliases ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 45

def all_aliases
  @aliases
end

#flush ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 24

def flush
  @commands = {}
  @aliases = {}
end

#get(cmd_name) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 33

def get(cmd_name)
  @commands[cmd_name.to_sym]
end

#get_alias(alias_name) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 49

def get_alias(alias_name)
  @aliases[alias_name.to_sym]
end

#remove(cmd_name) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 41

def remove(cmd_name)
  @commands.delete(cmd_name.to_sym)
end

#remove_alias(alias_name) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 63

def remove_alias(alias_name)
  @aliases.delete(alias_name.to_sym)
end