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 18

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 181

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 206

def all
  instance.all
end

.all_aliases ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 210

def all_aliases
  instance.all_aliases
end

.cli_ize(klass_name) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 214

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 74

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 91

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 78

def exec_command(command_name, args)
  #puts "exec_command(#{command_name}, #{args})"
  found_alias_command = instance.get_alias(command_name)
  if has_alias?(command_name)
    exec_alias(command_name, args)
  elsif has_command?(command_name)
    instance.get(command_name).new.handle(args)
  else
    # todo: need to just return error instead of raise
    raise CommandNotFoundError.new("'#{command_name}' is not a morpheus command.")
  end
end

.exec_expression(input) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 106

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

.has_alias?(alias_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/morpheus/cli/cli_registry.rb', line 198

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 190

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 69

def instance
  @instance ||= CliRegistry.new
end

.parse_alias_definition(input) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 226

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 success. 0 or

Returns:

  • (Array) —

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



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# File 'lib/morpheus/cli/cli_registry.rb', line 241

def parse_command_result(cmd_result)
  exit_code, err = nil, nil
  if cmd_result.is_a?(Array)
    exit_code = cmd_result[0] || 0
    err = cmd_result[1]
  elsif cmd_result.is_a?(Hash)
    exit_code = cmd_result[:exit_code] || 0
    err = 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, err
end

Instance Method Details

#add(cmd_name, klass) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 36

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 52

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 28

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 44

def all_aliases
  @aliases
end

#flush ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 23

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

#get(cmd_name) ⇒ Object 



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# File 'lib/morpheus/cli/cli_registry.rb', line 32

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 48

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 40

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 62

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