Add bin and edit workflow

bin/gems/pry-0.15.2/lib/pry/input_completer.rb

@@ -0,0 +1,283 @@
+# frozen_string_literal: true
+
+# taken from irb
+# Implements tab completion for Readline in Pry
+class Pry
+  class InputCompleter
+    NUMERIC_REGEXP = /^(-?(0[dbo])?[0-9_]+(\.[0-9_]+)?([eE]-?[0-9]+)?)\.([^.]*)$/.freeze
+    ARRAY_REGEXP = /^([^\]]*\])\.([^.]*)$/.freeze
+    SYMBOL_REGEXP = /^(:[^:.]*)$/.freeze
+    SYMBOL_METHOD_CALL_REGEXP = /^(:[^:.]+)\.([^.]*)$/.freeze
+    REGEX_REGEXP = %r{^(/[^/]*/)\.([^.]*)$}.freeze
+    PROC_OR_HASH_REGEXP = /^([^\}]*\})\.([^.]*)$/.freeze
+    TOPLEVEL_LOOKUP_REGEXP = /^::([A-Z][^:\.\(]*)$/.freeze
+    CONSTANT_REGEXP = /^([A-Z][A-Za-z0-9]*)$/.freeze
+    CONSTANT_OR_METHOD_REGEXP = /^([A-Z].*)::([^:.]*)$/.freeze
+    HEX_REGEXP = /^(-?0x[0-9a-fA-F_]+)\.([^.]*)$/.freeze
+    GLOBALVARIABLE_REGEXP = /^(\$[^.]*)$/.freeze
+    VARIABLE_REGEXP = /^([^."].*)\.([^.]*)$/.freeze
+
+    RESERVED_WORDS = %w[
+      BEGIN END
+      alias and
+      begin break
+      case class
+      def defined do
+      else elsif end ensure
+      false for
+      if in
+      module
+      next nil not
+      or
+      redo rescue retry return
+      self super
+      then true
+      undef unless until
+      when while
+      yield
+    ].freeze
+
+    WORD_ESCAPE_STR = " \t\n\"\\'`><=;|&{(".freeze
+
+    def initialize(input, pry = nil)
+      @pry = pry
+      @input = input
+      if @input.respond_to?(:basic_word_break_characters=)
+        @input.basic_word_break_characters = WORD_ESCAPE_STR
+      end
+
+      return unless @input.respond_to?(:completion_append_character=)
+
+      @input.completion_append_character = nil
+    end
+
+    # Return a new completion proc for use by Readline.
+    # rubocop:disable Metrics/AbcSize, Metrics/MethodLength
+    def call(str, options = {})
+      custom_completions = options[:custom_completions] || []
+      # if there are multiple contexts e.g. cd 1/2/3
+      # get new target for 1/2 and find candidates for 3
+      path, input = build_path(str)
+
+      if path.call.empty?
+        target = options[:target]
+      else
+        # Assume the user is tab-completing the 'cd' command
+        begin
+          target = Pry::ObjectPath.new(path.call, @pry.binding_stack).resolve.last
+        # but if that doesn't work, assume they're doing division with no spaces
+        rescue Pry::CommandError
+          target = options[:target]
+        end
+      end
+
+      begin
+        bind = target
+        # Complete stdlib symbols
+        case input
+        when REGEX_REGEXP # Regexp
+          receiver = Regexp.last_match(1)
+          message = Regexp.quote(Regexp.last_match(2))
+          candidates = Regexp.instance_methods.collect(&:to_s)
+          select_message(path, receiver, message, candidates)
+        when ARRAY_REGEXP # Array
+          receiver = Regexp.last_match(1)
+          message = Regexp.quote(Regexp.last_match(2))
+          candidates = Array.instance_methods.collect(&:to_s)
+          select_message(path, receiver, message, candidates)
+        when PROC_OR_HASH_REGEXP # Proc or Hash
+          receiver = Regexp.last_match(1)
+          message = Regexp.quote(Regexp.last_match(2))
+          candidates = Proc.instance_methods.collect(&:to_s)
+          candidates |= Hash.instance_methods.collect(&:to_s)
+          select_message(path, receiver, message, candidates)
+        when SYMBOL_REGEXP # Symbol
+          if Symbol.respond_to?(:all_symbols)
+            sym = Regexp.quote(Regexp.last_match(1))
+            candidates = Symbol.all_symbols.collect { |s| ":" + s.id2name }
+            candidates.grep(/^#{sym}/)
+          else
+            []
+          end
+        when TOPLEVEL_LOOKUP_REGEXP # Absolute Constant or class methods
+          receiver = Regexp.last_match(1)
+          candidates = Object.constants.collect(&:to_s)
+          candidates.grep(/^#{receiver}/).collect { |e| "::" + e }
+        when CONSTANT_REGEXP # Constant
+          message = Regexp.last_match(1)
+          begin
+            context = target.eval("self")
+            context = context.class unless context.respond_to? :constants
+            candidates = context.constants.collect(&:to_s)
+          rescue StandardError
+            candidates = []
+          end
+          candidates = candidates.grep(/^#{message}/).collect(&path)
+        when CONSTANT_OR_METHOD_REGEXP # Constant or class methods
+          receiver = Regexp.last_match(1)
+          message = Regexp.quote(Regexp.last_match(2))
+          begin
+            candidates = eval( # rubocop:disable Security/Eval
+              "#{receiver}.constants.collect(&:to_s)", bind, __FILE__, __LINE__
+            )
+            candidates |= eval( # rubocop:disable Security/Eval
+              "#{receiver}.methods.collect(&:to_s)", bind, __FILE__, __LINE__
+            )
+          rescue Pry::RescuableException
+            candidates = []
+          end
+          candidates.grep(/^#{message}/).collect { |e| receiver + "::" + e }
+        when SYMBOL_METHOD_CALL_REGEXP # method call on a Symbol
+          receiver = Regexp.last_match(1)
+          message = Regexp.quote(Regexp.last_match(2))
+          candidates = Symbol.instance_methods.collect(&:to_s)
+          select_message(path, receiver, message, candidates)
+        when NUMERIC_REGEXP
+          # Numeric
+          receiver = Regexp.last_match(1)
+          message = Regexp.quote(Regexp.last_match(5))
+          begin
+            # rubocop:disable Security/Eval
+            candidates = eval(receiver, bind).methods.collect(&:to_s)
+            # rubocop:enable Security/Eval
+          rescue Pry::RescuableException
+            candidates = []
+          end
+          select_message(path, receiver, message, candidates)
+        when HEX_REGEXP
+          # Numeric(0xFFFF)
+          receiver = Regexp.last_match(1)
+          message = Regexp.quote(Regexp.last_match(2))
+          begin
+            # rubocop:disable Security/Eval
+            candidates = eval(receiver, bind).methods.collect(&:to_s)
+            # rubocop:enable Security/Eval
+          rescue Pry::RescuableException
+            candidates = []
+          end
+          select_message(path, receiver, message, candidates)
+        when GLOBALVARIABLE_REGEXP # global
+          regmessage = Regexp.new(Regexp.quote(Regexp.last_match(1)))
+          candidates = global_variables.collect(&:to_s).grep(regmessage)
+        when VARIABLE_REGEXP # variable
+          receiver = Regexp.last_match(1)
+          message = Regexp.quote(Regexp.last_match(2))
+
+          gv = eval("global_variables", bind, __FILE__, __LINE__).collect(&:to_s)
+          lv = eval("local_variables", bind, __FILE__, __LINE__).collect(&:to_s)
+          cv = eval("self.class.constants", bind, __FILE__, __LINE__).collect(&:to_s)
+
+          if (gv | lv | cv).include?(receiver) || /^[A-Z]/ =~ receiver && /\./ !~ receiver
+            # foo.func and foo is local var. OR
+            # Foo::Bar.func
+            begin
+              candidates = eval( # rubocop:disable Security/Eval
+                "#{receiver}.methods", bind, __FILE__, __LINE__
+              ).collect(&:to_s)
+            rescue Pry::RescuableException
+              candidates = []
+            end
+          else
+            # func1.func2
+            require 'set'
+            candidates = Set.new
+            to_ignore = ignored_modules
+            ObjectSpace.each_object(Module) do |m|
+              next if begin
+                        to_ignore.include?(m)
+                      rescue StandardError
+                        true
+                      end
+
+              # jruby doesn't always provide #instance_methods() on each
+              # object.
+              if m.respond_to?(:instance_methods)
+                candidates.merge m.instance_methods(false).collect(&:to_s)
+              end
+            end
+          end
+          select_message(path, receiver, message, candidates.sort)
+        when /^\.([^.]*)$/
+          # Unknown(maybe String)
+          receiver = ""
+          message = Regexp.quote(Regexp.last_match(1))
+          candidates = String.instance_methods(true).collect(&:to_s)
+          select_message(path, receiver, message, candidates)
+        else
+          candidates = eval(
+            "methods | private_methods | local_variables | " \
+            "self.class.constants | instance_variables",
+            bind, __FILE__, __LINE__ - 2
+          ).collect(&:to_s)
+
+          if eval("respond_to?(:class_variables)", bind, __FILE__, __LINE__)
+            candidates += eval(
+              "class_variables", bind, __FILE__, __LINE__
+            ).collect(&:to_s)
+          end
+          candidates =
+            (candidates | RESERVED_WORDS | custom_completions)
+              .grep(/^#{Regexp.quote(input)}/)
+          candidates.collect(&path)
+        end
+      rescue Pry::RescuableException
+        []
+      end
+    end
+    # rubocop:enable Metrics/AbcSize, Metrics/MethodLength
+
+    def select_message(path, receiver, message, candidates)
+      candidates.grep(/^#{message}/).collect do |e|
+        next unless e =~ /^[a-zA-Z_]/
+
+        path.call(receiver + "." + e)
+      end.compact
+    end
+
+    # build_path separates the input into two parts: path and input.
+    # input is the partial string that should be completed
+    # path is a proc that takes an input and builds a full path.
+    def build_path(input)
+      # check to see if the input is a regex
+      return proc { |i| i.to_s }, input if input[%r{/\.}]
+
+      trailing_slash = input.end_with?('/')
+      contexts = input.chomp('/').split(%r{/})
+      input = contexts[-1]
+      path = proc do |i|
+        p = contexts[0..-2].push(i).join('/')
+        p += '/' if trailing_slash && !i.nil?
+        p
+      end
+      [path, input]
+    end
+
+    def ignored_modules
+      # We could cache the result, but IRB is not loaded by default.
+      # And this is very fast anyway.
+      # By using this approach, we avoid Module#name calls, which are
+      # relatively slow when there are a lot of anonymous modules defined.
+      s = Set.new
+
+      scanner = lambda do |m|
+        next if s.include?(m) # IRB::ExtendCommandBundle::EXCB recurses.
+
+        s << m
+        m.constants(false).each do |c|
+          value = m.const_get(c)
+          scanner.call(value) if value.is_a?(Module)
+        end
+      end
+
+      # FIXME: Add Pry here as well?
+      %i[IRB SLex RubyLex RubyToken].each do |module_name|
+        next unless Object.const_defined?(module_name)
+
+        scanner.call(Object.const_get(module_name))
+      end
+
+      s.delete(IRB::Context) if defined?(IRB::Context)
+      s
+    end
+  end
+end