# frozen_string_literal: false
#
# irb/extend-command.rb - irb extend command
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
module IRB # :nodoc:
# Installs the default irb extensions command bundle.
module ExtendCommandBundle
EXCB = ExtendCommandBundle # :nodoc:
# See #install_alias_method.
NO_OVERRIDE = 0
# See #install_alias_method.
OVERRIDE_PRIVATE_ONLY = 0x01
# See #install_alias_method.
OVERRIDE_ALL = 0x02
# Quits the current irb context
#
# +ret+ is the optional signal or message to send to Context#exit
#
# Same as <code>IRB.CurrentContext.exit</code>.
def irb_exit(ret = 0)
irb_context.exit(ret)
end
# Displays current configuration.
#
# Modifying the configuration is achieved by sending a message to IRB.conf.
def irb_context
IRB.CurrentContext
end
@ALIASES = [
[:context, :irb_context, NO_OVERRIDE],
[:conf, :irb_context, NO_OVERRIDE],
[:irb_quit, :irb_exit, OVERRIDE_PRIVATE_ONLY],
[:exit, :irb_exit, OVERRIDE_PRIVATE_ONLY],
[:quit, :irb_exit, OVERRIDE_PRIVATE_ONLY],
]
@EXTEND_COMMANDS = [
[
:irb_current_working_workspace, :CurrentWorkingWorkspace, "cmd/chws",
[:cwws, NO_OVERRIDE],
[:pwws, NO_OVERRIDE],
[:irb_print_working_workspace, OVERRIDE_ALL],
[:irb_cwws, OVERRIDE_ALL],
[:irb_pwws, OVERRIDE_ALL],
[:irb_current_working_binding, OVERRIDE_ALL],
[:irb_print_working_binding, OVERRIDE_ALL],
[:irb_cwb, OVERRIDE_ALL],
[:irb_pwb, OVERRIDE_ALL],
],
[
:irb_change_workspace, :ChangeWorkspace, "cmd/chws",
[:chws, NO_OVERRIDE],
[:cws, NO_OVERRIDE],
[:irb_chws, OVERRIDE_ALL],
[:irb_cws, OVERRIDE_ALL],
[:irb_change_binding, OVERRIDE_ALL],
[:irb_cb, OVERRIDE_ALL],
[:cb, NO_OVERRIDE],
],
[
:irb_workspaces, :Workspaces, "cmd/pushws",
[:workspaces, NO_OVERRIDE],
[:irb_bindings, OVERRIDE_ALL],
[:bindings, NO_OVERRIDE],
],
[
:irb_push_workspace, :PushWorkspace, "cmd/pushws",
[:pushws, NO_OVERRIDE],
[:irb_pushws, OVERRIDE_ALL],
[:irb_push_binding, OVERRIDE_ALL],
[:irb_pushb, OVERRIDE_ALL],
[:pushb, NO_OVERRIDE],
],
[
:irb_pop_workspace, :PopWorkspace, "cmd/pushws",
[:popws, NO_OVERRIDE],
[:irb_popws, OVERRIDE_ALL],
[:irb_pop_binding, OVERRIDE_ALL],
[:irb_popb, OVERRIDE_ALL],
[:popb, NO_OVERRIDE],
],
[
:irb_load, :Load, "cmd/load"],
[
:irb_require, :Require, "cmd/load"],
[
:irb_source, :Source, "cmd/load",
[:source, NO_OVERRIDE],
],
[
:irb, :IrbCommand, "cmd/subirb"],
[
:irb_jobs, :Jobs, "cmd/subirb",
[:jobs, NO_OVERRIDE],
],
[
:irb_fg, :Foreground, "cmd/subirb",
[:fg, NO_OVERRIDE],
],
[
:irb_kill, :Kill, "cmd/subirb",
[:kill, OVERRIDE_PRIVATE_ONLY],
],
[
:irb_debug, :Debug, "cmd/debug",
[:debug, NO_OVERRIDE],
],
[
:irb_edit, :Edit, "cmd/edit",
[:edit, NO_OVERRIDE],
],
[
:irb_break, :Break, "cmd/break",
],
[
:irb_catch, :Catch, "cmd/catch",
],
[
:irb_next, :Next, "cmd/next"
],
[
:irb_delete, :Delete, "cmd/delete",
[:delete, NO_OVERRIDE],
],
[
:irb_step, :Step, "cmd/step",
[:step, NO_OVERRIDE],
],
[
:irb_continue, :Continue, "cmd/continue",
[:continue, NO_OVERRIDE],
],
[
:irb_finish, :Finish, "cmd/finish",
[:finish, NO_OVERRIDE],
],
[
:irb_backtrace, :Backtrace, "cmd/backtrace",
[:backtrace, NO_OVERRIDE],
[:bt, NO_OVERRIDE],
],
[
:irb_debug_info, :Info, "cmd/info",
[:info, NO_OVERRIDE],
],
[
:irb_help, :Help, "cmd/help",
[:show_doc, NO_OVERRIDE],
[:help, NO_OVERRIDE],
],
[
:irb_info, :IrbInfo, "cmd/irb_info"
],
[
:irb_ls, :Ls, "cmd/ls",
[:ls, NO_OVERRIDE],
],
[
:irb_measure, :Measure, "cmd/measure",
[:measure, NO_OVERRIDE],
],
[
:irb_show_source, :ShowSource, "cmd/show_source",
[:show_source, NO_OVERRIDE],
],
[
:irb_whereami, :Whereami, "cmd/whereami",
[:whereami, NO_OVERRIDE],
],
[
:irb_show_cmds, :ShowCmds, "cmd/show_cmds",
[:show_cmds, NO_OVERRIDE],
]
]
@@commands = []
def self.all_commands_info
return @@commands unless @@commands.empty?
user_aliases = IRB.CurrentContext.command_aliases.each_with_object({}) do |(alias_name, target), result|
result[target] ||= []
result[target] << alias_name
end
@EXTEND_COMMANDS.each do |cmd_name, cmd_class, load_file, *aliases|
if !defined?(ExtendCommand) || !ExtendCommand.const_defined?(cmd_class, false)
require_relative load_file
end
klass = ExtendCommand.const_get(cmd_class, false)
aliases = aliases.map { |a| a.first }
if additional_aliases = user_aliases[cmd_name]
aliases += additional_aliases
end
display_name = aliases.shift || cmd_name
@@commands << { display_name: display_name, description: klass.description, category: klass.category }
end
@@commands
end
# Convert a command name to its implementation class if such command exists
def self.load_command(command)
command = command.to_sym
@EXTEND_COMMANDS.each do |cmd_name, cmd_class, load_file, *aliases|
next if cmd_name != command && aliases.all? { |alias_name, _| alias_name != command }
if !defined?(ExtendCommand) || !ExtendCommand.const_defined?(cmd_class, false)
require_relative load_file
end
return ExtendCommand.const_get(cmd_class, false)
end
nil
end
# Installs the default irb commands.
def self.install_extend_commands
for args in @EXTEND_COMMANDS
def_extend_command(*args)
end
end
# Evaluate the given +cmd_name+ on the given +cmd_class+ Class.
#
# Will also define any given +aliases+ for the method.
#
# The optional +load_file+ parameter will be required within the method
# definition.
def self.def_extend_command(cmd_name, cmd_class, load_file = nil, *aliases)
case cmd_class
when Symbol
cmd_class = cmd_class.id2name
when String
when Class
cmd_class = cmd_class.name
end
if load_file
kwargs = ", **kwargs" if RUBY_ENGINE == "ruby" && RUBY_VERSION >= "2.7.0"
line = __LINE__; eval %[
def #{cmd_name}(*opts#{kwargs}, &b)
Kernel.require_relative "#{load_file}"
arity = ::IRB::ExtendCommand::#{cmd_class}.instance_method(:execute).arity
args = (1..(arity < 0 ? ~arity : arity)).map {|i| "arg" + i.to_s }
args << "*opts#{kwargs}" if arity < 0
args << "&block"
args = args.join(", ")
line = __LINE__; eval %[
unless singleton_class.class_variable_defined?(:@@#{cmd_name}_)
singleton_class.class_variable_set(:@@#{cmd_name}_, true)
def self.#{cmd_name}_(\#{args})
::IRB::ExtendCommand::#{cmd_class}.execute(irb_context, \#{args})
end
end
], nil, __FILE__, line
__send__ :#{cmd_name}_, *opts#{kwargs}, &b
end
], nil, __FILE__, line
else
line = __LINE__; eval %[
def #{cmd_name}(*opts, &b)
::IRB::ExtendCommand::#{cmd_class}.execute(irb_context, *opts, &b)
end
], nil, __FILE__, line
end
for ali, flag in aliases
@ALIASES.push [ali, cmd_name, flag]
end
end
# Installs alias methods for the default irb commands, see
# ::install_extend_commands.
def install_alias_method(to, from, override = NO_OVERRIDE)
to = to.id2name unless to.kind_of?(String)
from = from.id2name unless from.kind_of?(String)
if override == OVERRIDE_ALL or
(override == OVERRIDE_PRIVATE_ONLY) && !respond_to?(to) or
(override == NO_OVERRIDE) && !respond_to?(to, true)
target = self
(class << self; self; end).instance_eval{
if target.respond_to?(to, true) &&
!target.respond_to?(EXCB.irb_original_method_name(to), true)
alias_method(EXCB.irb_original_method_name(to), to)
end
alias_method to, from
}
else
Kernel.print "irb: warn: can't alias #{to} from #{from}.\n"
end
end
def self.irb_original_method_name(method_name) # :nodoc:
"irb_" + method_name + "_org"
end
# Installs alias methods for the default irb commands on the given object
# using #install_alias_method.
def self.extend_object(obj)
unless (class << obj; ancestors; end).include?(EXCB)
super
for ali, com, flg in @ALIASES
obj.install_alias_method(ali, com, flg)
end
end
end
install_extend_commands
end
# Extends methods for the Context module
module ContextExtender
CE = ContextExtender # :nodoc:
@EXTEND_COMMANDS = [
[:eval_history=, "ext/history.rb"],
[:use_tracer=, "ext/tracer.rb"],
[:use_loader=, "ext/use-loader.rb"],
[:save_history=, "ext/save-history.rb"],
]
# Installs the default context extensions as irb commands:
#
# Context#eval_history=:: +irb/ext/history.rb+
# Context#use_tracer=:: +irb/ext/tracer.rb+
# Context#use_loader=:: +irb/ext/use-loader.rb+
# Context#save_history=:: +irb/ext/save-history.rb+
def self.install_extend_commands
for args in @EXTEND_COMMANDS
def_extend_command(*args)
end
end
# Evaluate the given +command+ from the given +load_file+ on the Context
# module.
#
# Will also define any given +aliases+ for the method.
def self.def_extend_command(cmd_name, load_file, *aliases)
line = __LINE__; Context.module_eval %[
def #{cmd_name}(*opts, &b)
Context.module_eval {remove_method(:#{cmd_name})}
require_relative "#{load_file}"
__send__ :#{cmd_name}, *opts, &b
end
for ali in aliases
alias_method ali, cmd_name
end
], __FILE__, line
end
CE.install_extend_commands
end
# A convenience module for extending Ruby methods.
module MethodExtender
# Extends the given +base_method+ with a prefix call to the given
# +extend_method+.
def def_pre_proc(base_method, extend_method)
base_method = base_method.to_s
extend_method = extend_method.to_s
alias_name = new_alias_name(base_method)
module_eval %[
alias_method alias_name, base_method
def #{base_method}(*opts)
__send__ :#{extend_method}, *opts
__send__ :#{alias_name}, *opts
end
]
end
# Extends the given +base_method+ with a postfix call to the given
# +extend_method+.
def def_post_proc(base_method, extend_method)
base_method = base_method.to_s
extend_method = extend_method.to_s
alias_name = new_alias_name(base_method)
module_eval %[
alias_method alias_name, base_method
def #{base_method}(*opts)
__send__ :#{alias_name}, *opts
__send__ :#{extend_method}, *opts
end
]
end
# Returns a unique method name to use as an alias for the given +name+.
#
# Usually returns <code>#{prefix}#{name}#{postfix}<num></code>, example:
#
# new_alias_name('foo') #=> __alias_of__foo__
# def bar; end
# new_alias_name('bar') #=> __alias_of__bar__2
def new_alias_name(name, prefix = "__alias_of__", postfix = "__")
base_name = "#{prefix}#{name}#{postfix}"
all_methods = instance_methods(true) + private_instance_methods(true)
same_methods = all_methods.grep(/^#{Regexp.quote(base_name)}[0-9]*$/)
return base_name if same_methods.empty?
no = same_methods.size
while !same_methods.include?(alias_name = base_name + no)
no += 1
end
alias_name
end
end
end
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