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pry--pry/lib/pry/helpers/base_helpers.rb
Kyrylo Silin 9a2999982c BaseHelpers: add #jruby_19? method
And remove some naive comments.
2013-02-04 17:57:00 +02:00

200 lines
5.9 KiB
Ruby

class Pry
module Helpers
module BaseHelpers
module_function
def silence_warnings
old_verbose = $VERBOSE
$VERBOSE = nil
begin
yield
ensure
$VERBOSE = old_verbose
end
end
# Acts like send but ignores any methods defined below Object or Class in the
# inheritance hierarchy.
# This is required to introspect methods on objects like Net::HTTP::Get that
# have overridden the `method` method.
def safe_send(obj, method, *args, &block)
(Module === obj ? Module : Object).instance_method(method).bind(obj).call(*args, &block)
end
public :safe_send
def find_command(name, set = Pry::Commands)
command_match = set.find do |_, command|
(listing = command.options[:listing]) == name && listing != nil
end
command_match.last if command_match
end
def not_a_real_file?(file)
file =~ /(\(.*\))|<.*>/ || file =~ /__unknown__/ || file == "" || file == "-e"
end
def command_dependencies_met?(options)
return true if !options[:requires_gem]
Array(options[:requires_gem]).all? do |g|
Rubygem.installed?(g)
end
end
def set_file_and_dir_locals(file_name, _pry_=_pry_(), target=target())
return if !target or !file_name
_pry_.last_file = File.expand_path(file_name)
_pry_.inject_local("_file_", _pry_.last_file, target)
_pry_.last_dir = File.dirname(_pry_.last_file)
_pry_.inject_local("_dir_", _pry_.last_dir, target)
end
def use_ansi_codes?
windows_ansi? || ENV['TERM'] && ENV['TERM'] != "dumb"
end
def colorize_code(code)
if Pry.color
CodeRay.scan(code, :ruby).term
else
code
end
end
def highlight(string, regexp, highlight_color=:bright_yellow)
string.gsub(regexp) { |match| "<#{highlight_color}>#{match}</#{highlight_color}>" }
end
# formatting
def heading(text)
text = "#{text}\n--"
Pry.color ? "\e[1m#{text}\e[0m": text
end
# have fun on the Windows platform.
def windows?
RbConfig::CONFIG['host_os'] =~ /mswin|mingw/
end
# are we able to use ansi on windows?
def windows_ansi?
defined?(Win32::Console) || ENV['ANSICON']
end
def jruby?
RbConfig::CONFIG['ruby_install_name'] == 'jruby'
end
def jruby_19?
RbConfig::CONFIG['ruby_install_name'] == 'jruby' &&
RbConfig::CONFIG['ruby_version'] == '1.9'
end
def rbx?
RbConfig::CONFIG['ruby_install_name'] == 'rbx'
end
def mri_18?
RUBY_VERSION =~ /1.8/ && RbConfig::CONFIG['ruby_install_name'] == 'ruby'
end
def mri_19?
RUBY_VERSION =~ /1.9/ && RbConfig::CONFIG['ruby_install_name'] == 'ruby'
end
# Try to use `less` for paging, if it fails then use
# simple_pager. Also do not page if Pry.pager is falsey
def stagger_output(text, out = nil)
out ||= case
when respond_to?(:output)
# Mixin.
output
when Pry.respond_to?(:output)
# Parent.
Pry.output
else
# Sys.
$stdout
end
if text.lines.count < Pry::Pager.page_size || !Pry.pager
out.puts text
else
Pry::Pager.page(text)
end
rescue Errno::ENOENT
Pry::Pager.page(text, :simple)
rescue Errno::EPIPE
end
# @param [String] arg_string The object path expressed as a string.
# @param [Pry] _pry_ The relevant Pry instance.
# @param [Array<Binding>] old_stack The state of the old binding stack
# @return [Array<Array<Binding>, Array<Binding>>] An array
# containing two elements: The new `binding_stack` and the old `binding_stack`.
def context_from_object_path(arg_string, _pry_=nil, old_stack=[])
# Extract command arguments. Delete blank arguments like " ", but
# don't delete empty strings like "".
path = arg_string.split(/\//).delete_if { |a| a =~ /\A\s+\z/ }
stack = _pry_.binding_stack.dup
state_old_stack = old_stack
# Special case when we only get a single "/", return to root.
if path.empty?
state_old_stack = stack.dup unless old_stack.empty?
stack = [stack.first]
end
path.each_with_index do |context, i|
begin
case context.chomp
when ""
state_old_stack = stack.dup
stack = [stack.first]
when "::"
state_old_stack = stack.dup
stack.push(TOPLEVEL_BINDING)
when "."
next
when ".."
unless stack.size == 1
# Don't rewrite old_stack if we're in complex expression
# (e.g.: `cd 1/2/3/../4).
state_old_stack = stack.dup if path.first == ".."
stack.pop
end
when "-"
unless old_stack.empty?
# Interchange current stack and old stack with each other.
stack, state_old_stack = state_old_stack, stack
end
else
state_old_stack = stack.dup if i == 0
stack.push(Pry.binding_for(stack.last.eval(context)))
end
rescue RescuableException => e
# Restore old stack to its initial values.
state_old_stack = old_stack
msg = [
"Bad object path: #{arg_string}.",
"Failed trying to resolve: #{context}.",
e.inspect
].join(' ')
CommandError.new(msg).tap do |err|
err.set_backtrace e.backtrace
raise err
end
end
end
return stack, state_old_stack
end
end
end
end