lib/command_line_parser.rb
require 'trollop'
require 'method_parser'
require 'colorize'
# Parses command line and configure #Trollop
class CommandLineParser
attr_reader :method, :initialize_method
@debug = false
# Generate tool help menu.
# IMPORTANT! Should be executed before ARGV.shift
def initialize(file_parser)
@file_parser = file_parser
@sub_commands = @file_parser.runnable_methods.map { |m| m.name.to_s }
@sub_commands_text = @file_parser.runnable_methods.map do |m|
[
m.name.to_s,
FileParser.select_runnable_tags(m).map(&:text).join("\n")
]
end.to_h
@parser = Trollop::Parser.new
@parser.opt(:debug, 'Run in debug mode.', type: :flag)
@parser.stop_on @sub_commands
@initialize_method = nil
end
def self.debug?
@debug
end
def self.debug=(value)
return if @debug
ENV['CR_DEBUG'] = 'true'
@debug = value
end
def tool_banner
result = FileParser.select_runnable_tags(@file_parser.clazz).map(&:text).join("\n")
result += "\n\nAvailable actions:\n"
result += @sub_commands_text.map do |c, text|
t = "\t- #{c}"
t += "\n\t\t#{text}" if text != ''
t
end.join("\n")
result
end
def maybe_help(banner, action_name = nil)
action = action_name
scope = ARGV
if action_name
action_index = ARGV.index(action)
scope = ARGV[0..action_index] if action_index
end
return unless scope.any? { |a| %w(-h --help).include? a }
@parser.banner("\n" + banner)
Trollop::with_standard_exception_handling(@parser) { raise Trollop::HelpNeeded }
end
def raise_on_action_absence(sub_commands)
return if ARGV.any? { |a| sub_commands.include? a }
raise RubyFireCLIError, "You must provide one of available actions: #{sub_commands.join ', '}"
end
def run(action)
maybe_help(tool_banner, action ? action.name.to_s : nil)
raise RubyFireCLIError, 'Cannot find any @runnable action' unless action
raise_on_action_absence @sub_commands
@initialize_method ||= MethodParser.new(@file_parser.initialize_method) if @file_parser.initialize_method
@method = MethodParser.new action
[@initialize_method, @method].each do |method|
next unless method
method.trollop_opts.each { |a| @parser.opt(*a) }
maybe_help(method.text, action.name.to_s)
cmd_opts = @parser.parse ARGV
given_attrs = cmd_opts.keys.select { |k| k.to_s.include? '_given' }.map { |k| k.to_s.gsub('_given', '').to_sym }
method.cmd_opts = cmd_opts.select { |k, _| given_attrs.include? k }
method.default_values.each do |k, v|
param_name = k.to_sym
next if method.option_tags.map(&:name).include?(param_name.to_s)
method.cmd_opts[param_name] ||= v
end
method.required_parameters.each do |required_param|
next if method.options_group? required_param
next if method.cmd_opts[required_param.to_sym]
raise RubyFireCLIError, "You must specify required parameter: #{required_param}"
end
ARGV.shift
end
end
end