mirror of
https://github.com/pry/pry.git
synced 2022-11-09 12:35:05 -05:00
661 lines
18 KiB
Ruby
661 lines
18 KiB
Ruby
class Pry::Slop
|
|
require_relative 'slop/option'
|
|
require_relative 'slop/commands'
|
|
include Enumerable
|
|
VERSION = '3.4.0'
|
|
|
|
# The main Error class, all Exception classes inherit from this class.
|
|
class Error < StandardError; end
|
|
|
|
# Raised when an option argument is expected but none are given.
|
|
class MissingArgumentError < Error; end
|
|
|
|
# Raised when an option is expected/required but not present.
|
|
class MissingOptionError < Error; end
|
|
|
|
# Raised when an argument does not match its intended match constraint.
|
|
class InvalidArgumentError < Error; end
|
|
|
|
# Raised when an invalid option is found and the strict flag is enabled.
|
|
class InvalidOptionError < Error; end
|
|
|
|
# Raised when an invalid command is found and the strict flag is enabled.
|
|
class InvalidCommandError < Error; end
|
|
|
|
# Returns a default Hash of configuration options this Slop instance uses.
|
|
DEFAULT_OPTIONS = {
|
|
strict: false,
|
|
help: false,
|
|
banner: nil,
|
|
ignore_case: false,
|
|
autocreate: false,
|
|
arguments: false,
|
|
optional_arguments: false,
|
|
multiple_switches: true,
|
|
longest_flag: 0
|
|
}
|
|
|
|
class << self
|
|
# items - The Array of items to extract options from (default: ARGV).
|
|
# config - The Hash of configuration options to send to Slop.new().
|
|
# block - An optional block used to add options.
|
|
#
|
|
# Examples:
|
|
#
|
|
# Slop.parse(ARGV, :help => true) do
|
|
# on '-n', '--name', 'Your username', :argument => true
|
|
# end
|
|
#
|
|
# Returns a new instance of Slop.
|
|
def parse(items = ARGV, config = {}, &block)
|
|
parse! items.dup, config, &block
|
|
end
|
|
|
|
# items - The Array of items to extract options from (default: ARGV).
|
|
# config - The Hash of configuration options to send to Slop.new().
|
|
# block - An optional block used to add options.
|
|
#
|
|
# Returns a new instance of Slop.
|
|
def parse!(items = ARGV, config = {}, &block)
|
|
config, items = items, ARGV if items.is_a?(Hash) && config.empty?
|
|
slop = Pry::Slop.new config, &block
|
|
slop.parse! items
|
|
slop
|
|
end
|
|
|
|
# Build a Slop object from a option specification.
|
|
#
|
|
# This allows you to design your options via a simple String rather
|
|
# than programatically. Do note though that with this method, you're
|
|
# unable to pass any advanced options to the on() method when creating
|
|
# options.
|
|
#
|
|
# string - The optspec String
|
|
# config - A Hash of configuration options to pass to Slop.new
|
|
#
|
|
# Examples:
|
|
#
|
|
# opts = Slop.optspec(<<-SPEC)
|
|
# ruby foo.rb [options]
|
|
# ---
|
|
# n,name= Your name
|
|
# a,age= Your age
|
|
# A,auth Sign in with auth
|
|
# p,passcode= Your secret pass code
|
|
# SPEC
|
|
#
|
|
# opts.fetch_option(:name).description #=> "Your name"
|
|
#
|
|
# Returns a new instance of Slop.
|
|
def optspec(string, config = {})
|
|
config[:banner], optspec = string.split(/^--+$/, 2) if string[/^--+$/]
|
|
lines = optspec.split("\n").reject(&:empty?)
|
|
opts = Slop.new(config)
|
|
|
|
lines.each do |line|
|
|
opt, description = line.split(' ', 2)
|
|
short, long = opt.split(',').map { |s| s.sub(/\A--?/, '') }
|
|
opt = opts.on(short, long, description)
|
|
|
|
if long && long.end_with?('=')
|
|
long.sub!(/\=$/, '')
|
|
opt.config[:argument] = true
|
|
end
|
|
end
|
|
|
|
opts
|
|
end
|
|
end
|
|
|
|
# The Hash of configuration options for this Slop instance.
|
|
attr_reader :config
|
|
|
|
# The Array of Slop::Option objects tied to this Slop instance.
|
|
attr_reader :options
|
|
|
|
# Create a new instance of Slop and optionally build options via a block.
|
|
#
|
|
# config - A Hash of configuration options.
|
|
# block - An optional block used to specify options.
|
|
def initialize(config = {}, &block)
|
|
@config = DEFAULT_OPTIONS.merge(config)
|
|
@options = []
|
|
@commands = {}
|
|
@trash = []
|
|
@triggered_options = []
|
|
@unknown_options = []
|
|
@callbacks = {}
|
|
@separators = {}
|
|
@runner = nil
|
|
|
|
if block_given?
|
|
block.arity == 1 ? yield(self) : instance_eval(&block)
|
|
end
|
|
|
|
if config[:help]
|
|
on('-h', '--help', 'Display this help message.', tail: true) do
|
|
$stderr.puts help
|
|
end
|
|
end
|
|
end
|
|
|
|
# Is strict mode enabled?
|
|
#
|
|
# Returns true if strict mode is enabled, false otherwise.
|
|
def strict?
|
|
config[:strict]
|
|
end
|
|
|
|
# Set the banner.
|
|
#
|
|
# banner - The String to set the banner.
|
|
def banner=(banner)
|
|
config[:banner] = banner
|
|
end
|
|
|
|
# Get or set the banner.
|
|
#
|
|
# banner - The String to set the banner.
|
|
#
|
|
# Returns the banner String.
|
|
def banner(banner = nil)
|
|
config[:banner] = banner if banner
|
|
config[:banner]
|
|
end
|
|
|
|
# Set the description (used for commands).
|
|
#
|
|
# desc - The String to set the description.
|
|
def description=(desc)
|
|
config[:description] = desc
|
|
end
|
|
|
|
# Get or set the description (used for commands).
|
|
#
|
|
# desc - The String to set the description.
|
|
#
|
|
# Returns the description String.
|
|
def description(desc = nil)
|
|
config[:description] = desc if desc
|
|
config[:description]
|
|
end
|
|
|
|
# Add a new command.
|
|
#
|
|
# command - The Symbol or String used to identify this command.
|
|
# options - A Hash of configuration options (see Slop::new)
|
|
#
|
|
# Returns a new instance of Slop mapped to this command.
|
|
def command(command, options = {}, &block)
|
|
@commands[command.to_s] = Pry::Slop.new(options, &block)
|
|
end
|
|
|
|
# Parse a list of items, executing and gathering options along the way.
|
|
#
|
|
# items - The Array of items to extract options from (default: ARGV).
|
|
# block - An optional block which when used will yield non options.
|
|
#
|
|
# Returns an Array of original items.
|
|
def parse(items = ARGV, &block)
|
|
parse! items.dup, &block
|
|
items
|
|
end
|
|
|
|
# Parse a list of items, executing and gathering options along the way.
|
|
# unlike parse() this method will remove any options and option arguments
|
|
# from the original Array.
|
|
#
|
|
# items - The Array of items to extract options from (default: ARGV).
|
|
# block - An optional block which when used will yield non options.
|
|
#
|
|
# Returns an Array of original items with options removed.
|
|
def parse!(items = ARGV, &block)
|
|
if items.empty? && @callbacks[:empty]
|
|
@callbacks[:empty].each { |cb| cb.call(self) }
|
|
return items
|
|
end
|
|
|
|
if (cmd = @commands[items[0]])
|
|
return cmd.parse! items[1..-1]
|
|
end
|
|
|
|
items.each_with_index do |item, index|
|
|
@trash << index && break if item == '--'
|
|
autocreate(items, index) if config[:autocreate]
|
|
process_item(items, index, &block) unless @trash.include?(index)
|
|
end
|
|
items.reject!.with_index { |item, index| @trash.include?(index) }
|
|
|
|
missing_options = options.select { |opt| opt.required? && opt.count < 1 }
|
|
if missing_options.any?
|
|
raise MissingOptionError,
|
|
"Missing required option(s): #{missing_options.map(&:key).join(', ')}"
|
|
end
|
|
|
|
if @unknown_options.any?
|
|
raise InvalidOptionError, "Unknown options #{@unknown_options.join(', ')}"
|
|
end
|
|
|
|
if @triggered_options.empty? && @callbacks[:no_options]
|
|
@callbacks[:no_options].each { |cb| cb.call(self) }
|
|
end
|
|
|
|
@runner.call(self, items) if @runner.respond_to?(:call)
|
|
|
|
items
|
|
end
|
|
|
|
# Add an Option.
|
|
#
|
|
# objects - An Array with an optional Hash as the last element.
|
|
#
|
|
# Examples:
|
|
#
|
|
# on '-u', '--username=', 'Your username'
|
|
# on :v, :verbose, 'Enable verbose mode'
|
|
#
|
|
# Returns the created instance of Slop::Option.
|
|
def on(*objects, &block)
|
|
option = build_option(objects, &block)
|
|
options << option
|
|
option
|
|
end
|
|
alias option on
|
|
alias opt on
|
|
|
|
# Fetch an options argument value.
|
|
#
|
|
# key - The Symbol or String option short or long flag.
|
|
#
|
|
# Returns the Object value for this option, or nil.
|
|
def [](key)
|
|
option = fetch_option(key)
|
|
option.value if option
|
|
end
|
|
alias get []
|
|
|
|
# Returns a new Hash with option flags as keys and option values as values.
|
|
#
|
|
# include_commands - If true, merge options from all sub-commands.
|
|
def to_hash(include_commands = false)
|
|
hash = Hash[options.map { |opt| [opt.key.to_sym, opt.value] }]
|
|
if include_commands
|
|
@commands.each { |cmd, opts| hash.merge!(cmd.to_sym => opts.to_hash) }
|
|
end
|
|
hash
|
|
end
|
|
alias to_h to_hash
|
|
|
|
# Enumerable interface. Yields each Slop::Option.
|
|
def each(&block)
|
|
options.each(&block)
|
|
end
|
|
|
|
# Specify code to be executed when these options are parsed.
|
|
#
|
|
# callable - An object responding to a call method.
|
|
#
|
|
# yields - The instance of Slop parsing these options
|
|
# An Array of unparsed arguments
|
|
#
|
|
# Example:
|
|
#
|
|
# Slop.parse do
|
|
# on :v, :verbose
|
|
#
|
|
# run do |opts, args|
|
|
# puts "Arguments: #{args.inspect}" if opts.verbose?
|
|
# end
|
|
# end
|
|
def run(callable = nil, &block)
|
|
@runner = callable || block
|
|
unless @runner.respond_to?(:call)
|
|
raise ArgumentError, "You must specify a callable object or a block to #run"
|
|
end
|
|
end
|
|
|
|
# Check for an options presence.
|
|
#
|
|
# Examples:
|
|
#
|
|
# opts.parse %w( --foo )
|
|
# opts.present?(:foo) #=> true
|
|
# opts.present?(:bar) #=> false
|
|
#
|
|
# Returns true if all of the keys are present in the parsed arguments.
|
|
def present?(*keys)
|
|
keys.all? { |key| (opt = fetch_option(key)) && opt.count > 0 }
|
|
end
|
|
|
|
# Override this method so we can check if an option? method exists.
|
|
#
|
|
# Returns true if this option key exists in our list of options.
|
|
def respond_to_missing?(method_name, include_all=false)
|
|
options.any? { |o| o.key == method_name.to_s.chop } || super
|
|
end
|
|
|
|
# Fetch a list of options which were missing from the parsed list.
|
|
#
|
|
# Examples:
|
|
#
|
|
# opts = Slop.new do
|
|
# on :n, :name=
|
|
# on :p, :password=
|
|
# end
|
|
#
|
|
# opts.parse %w[ --name Lee ]
|
|
# opts.missing #=> ['password']
|
|
#
|
|
# Returns an Array of Strings representing missing options.
|
|
def missing
|
|
(options - @triggered_options).map(&:key)
|
|
end
|
|
|
|
# Fetch a Slop::Option object.
|
|
#
|
|
# key - The Symbol or String option key.
|
|
#
|
|
# Examples:
|
|
#
|
|
# opts.on(:foo, 'Something fooey', :argument => :optional)
|
|
# opt = opts.fetch_option(:foo)
|
|
# opt.class #=> Slop::Option
|
|
# opt.accepts_optional_argument? #=> true
|
|
#
|
|
# Returns an Option or nil if none were found.
|
|
def fetch_option(key)
|
|
options.find { |option| [option.long, option.short].include?(clean(key)) }
|
|
end
|
|
|
|
# Fetch a Slop object associated with this command.
|
|
#
|
|
# command - The String or Symbol name of the command.
|
|
#
|
|
# Examples:
|
|
#
|
|
# opts.command :foo do
|
|
# on :v, :verbose, 'Enable verbose mode'
|
|
# end
|
|
#
|
|
# # ruby run.rb foo -v
|
|
# opts.fetch_command(:foo).verbose? #=> true
|
|
def fetch_command(command)
|
|
@commands[command.to_s]
|
|
end
|
|
|
|
# Add a callback.
|
|
#
|
|
# label - The Symbol identifier to attach this callback.
|
|
#
|
|
# Returns nothing.
|
|
def add_callback(label, &block)
|
|
(@callbacks[label] ||= []) << block
|
|
end
|
|
|
|
# Add string separators between options.
|
|
#
|
|
# text - The String text to print.
|
|
def separator(text)
|
|
if @separators[options.size]
|
|
@separators[options.size] << "\n#{text}"
|
|
else
|
|
@separators[options.size] = text
|
|
end
|
|
end
|
|
|
|
# Print a handy Slop help string.
|
|
#
|
|
# Returns the banner followed by available option help strings.
|
|
def to_s
|
|
heads = options.reject(&:tail?)
|
|
tails = (options - heads)
|
|
opts = (heads + tails).select(&:help).map(&:to_s)
|
|
optstr = opts.each_with_index.map { |o, i|
|
|
(str = @separators[i + 1]) ? [o, str].join("\n") : o
|
|
}.join("\n")
|
|
|
|
if @commands.any?
|
|
optstr << "\n" if !optstr.empty?
|
|
optstr << "\nAvailable commands:\n\n"
|
|
optstr << commands_to_help
|
|
optstr << "\n\nSee `<command> --help` for more information on a specific command."
|
|
end
|
|
|
|
banner = config[:banner]
|
|
banner = "Usage: #{File.basename($0, '.*')}#{' [command]' if @commands.any?} [options]" if banner.nil?
|
|
if banner
|
|
"#{banner}\n#{@separators[0] ? "#{@separators[0]}\n" : ''}#{optstr}"
|
|
else
|
|
optstr
|
|
end
|
|
end
|
|
alias help to_s
|
|
|
|
private
|
|
|
|
# Convenience method for present?(:option).
|
|
#
|
|
# Examples:
|
|
#
|
|
# opts.parse %( --verbose )
|
|
# opts.verbose? #=> true
|
|
# opts.other? #=> false
|
|
#
|
|
# Returns true if this option is present. If this method does not end
|
|
# with a ? character it will instead call super().
|
|
def method_missing(method, *args, &block)
|
|
meth = method.to_s
|
|
if meth.end_with?('?')
|
|
meth.chop!
|
|
present?(meth) || present?(meth.gsub('_', '-'))
|
|
else
|
|
super
|
|
end
|
|
end
|
|
|
|
# Process a list item, figure out if it's an option, execute any
|
|
# callbacks, assign any option arguments, and do some sanity checks.
|
|
#
|
|
# items - The Array of items to process.
|
|
# index - The current Integer index of the item we want to process.
|
|
# block - An optional block which when passed will yield non options.
|
|
#
|
|
# Returns nothing.
|
|
def process_item(items, index, &block)
|
|
return unless (item = items[index])
|
|
|
|
option, argument = extract_option(item) if item.start_with?('-')
|
|
|
|
if option
|
|
option.count += 1 unless item.start_with?('--no-')
|
|
option.count += 1 if option.key[0, 3] == "no-"
|
|
@trash << index
|
|
@triggered_options << option
|
|
|
|
if option.expects_argument?
|
|
argument ||= items.at(index + 1)
|
|
|
|
if !argument || argument =~ /\A--?[a-zA-Z][a-zA-Z0-9_-]*\z/
|
|
raise MissingArgumentError, "#{option.key} expects an argument"
|
|
end
|
|
|
|
execute_option(option, argument, index, item)
|
|
elsif option.accepts_optional_argument?
|
|
argument ||= items.at(index + 1)
|
|
|
|
if argument && argument =~ /\A([^\-?]|-\d)+/
|
|
execute_option(option, argument, index, item)
|
|
else
|
|
option.call(nil)
|
|
end
|
|
elsif config[:multiple_switches] && argument
|
|
execute_multiple_switches(option, argument, index)
|
|
else
|
|
option.value = option.count > 0
|
|
option.call(nil)
|
|
end
|
|
else
|
|
@unknown_options << item if strict? && item =~ /\A--?/
|
|
block.call(item) if block && !@trash.include?(index)
|
|
end
|
|
end
|
|
|
|
# Execute an option, firing off callbacks and assigning arguments.
|
|
#
|
|
# option - The Slop::Option object found by #process_item.
|
|
# argument - The argument Object to assign to this option.
|
|
# index - The current Integer index of the object we're processing.
|
|
# item - The optional String item we're processing.
|
|
#
|
|
# Returns nothing.
|
|
def execute_option(option, argument, index, item = nil)
|
|
if !option
|
|
if config[:multiple_switches] && strict?
|
|
raise InvalidOptionError, "Unknown option -#{item}"
|
|
end
|
|
|
|
return
|
|
end
|
|
|
|
if argument
|
|
unless item && item.end_with?("=#{argument}")
|
|
@trash << index + 1 unless option.argument_in_value
|
|
end
|
|
option.value = argument
|
|
else
|
|
option.value = option.count > 0
|
|
end
|
|
|
|
if option.match? && !argument.match(option.config[:match])
|
|
raise InvalidArgumentError, "#{argument} is an invalid argument"
|
|
end
|
|
|
|
option.call(option.value)
|
|
end
|
|
|
|
# Execute a `-abc` type option where a, b and c are all options. This
|
|
# method is only executed if the multiple_switches argument is true.
|
|
#
|
|
# option - The first Option object.
|
|
# argument - The argument to this option. (Split into multiple Options).
|
|
# index - The index of the current item being processed.
|
|
#
|
|
# Returns nothing.
|
|
def execute_multiple_switches(option, argument, index)
|
|
execute_option(option, nil, index)
|
|
argument.split('').each do |key|
|
|
next unless (opt = fetch_option(key))
|
|
|
|
opt.count += 1
|
|
execute_option(opt, nil, index, key)
|
|
end
|
|
end
|
|
|
|
# Extract an option from a flag.
|
|
#
|
|
# flag - The flag key used to extract an option.
|
|
#
|
|
# Returns an Array of [option, argument].
|
|
def extract_option(flag)
|
|
option = fetch_option(flag)
|
|
option ||= fetch_option(flag.downcase) if config[:ignore_case]
|
|
option ||= fetch_option(flag.gsub(/([^-])-/, '\1_'))
|
|
|
|
unless option
|
|
case flag
|
|
when /\A--?([^=]+)=(.+)\z/, /\A-([a-zA-Z])(.+)\z/, /\A--no-(.+)\z/
|
|
option, argument = fetch_option($1), ($2 || false)
|
|
option.argument_in_value = true if option
|
|
end
|
|
end
|
|
|
|
[option, argument]
|
|
end
|
|
|
|
# Autocreate an option on the fly. See the :autocreate Slop config option.
|
|
#
|
|
# items - The Array of items we're parsing.
|
|
# index - The current Integer index for the item we're processing.
|
|
#
|
|
# Returns nothing.
|
|
def autocreate(items, index)
|
|
flag = items[index]
|
|
if !fetch_option(flag) && !@trash.include?(index)
|
|
option = build_option(Array(flag))
|
|
argument = items[index + 1]
|
|
option.config[:argument] = (argument && argument !~ /\A--?/)
|
|
option.config[:autocreated] = true
|
|
options << option
|
|
end
|
|
end
|
|
|
|
# Build an option from a list of objects.
|
|
#
|
|
# objects - An Array of objects used to build this option.
|
|
#
|
|
# Returns a new instance of Slop::Option.
|
|
def build_option(objects, &block)
|
|
config = {}
|
|
config[:argument] = true if @config[:arguments]
|
|
config[:optional_argument] = true if @config[:optional_arguments]
|
|
|
|
if objects.last.is_a?(Hash)
|
|
config.merge!(objects.last)
|
|
objects.pop
|
|
end
|
|
short = extract_short_flag(objects, config)
|
|
long = extract_long_flag(objects, config)
|
|
desc = objects[0].respond_to?(:to_str) ? objects.shift : nil
|
|
|
|
Option.new(self, short, long, desc, config, &block)
|
|
end
|
|
|
|
# Extract the short flag from an item.
|
|
#
|
|
# objects - The Array of objects passed from #build_option.
|
|
# config - The Hash of configuration options built in #build_option.
|
|
def extract_short_flag(objects, config)
|
|
flag = clean(objects.first)
|
|
|
|
if flag.size == 2 && flag.end_with?('=')
|
|
config[:argument] ||= true
|
|
flag.chop!
|
|
end
|
|
|
|
if flag.size == 1
|
|
objects.shift
|
|
flag
|
|
end
|
|
end
|
|
|
|
# Extract the long flag from an item.
|
|
#
|
|
# objects - The Array of objects passed from #build_option.
|
|
# config - The Hash of configuration options built in #build_option.
|
|
def extract_long_flag(objects, config)
|
|
flag = objects.first.to_s
|
|
if flag =~ /\A(?:--?)?[a-zA-Z][a-zA-Z0-9_-]+\=?\??\z/
|
|
config[:argument] ||= true if flag.end_with?('=')
|
|
config[:optional_argument] = true if flag.end_with?('=?')
|
|
objects.shift
|
|
clean(flag).sub(/\=\??\z/, '')
|
|
end
|
|
end
|
|
|
|
# Remove any leading -- characters from a string.
|
|
#
|
|
# object - The Object we want to cast to a String and clean.
|
|
#
|
|
# Returns the newly cleaned String with leading -- characters removed.
|
|
def clean(object)
|
|
object.to_s.sub(/\A--?/, '')
|
|
end
|
|
|
|
def commands_to_help
|
|
padding = 0
|
|
@commands.each { |c, _| padding = c.size if c.size > padding }
|
|
@commands.map do |cmd, opts|
|
|
" #{cmd}#{' ' * (padding - cmd.size)} #{opts.description}"
|
|
end.join("\n")
|
|
end
|
|
end
|