304 lines
9.1 KiB
Ruby
304 lines
9.1 KiB
Ruby
class Pry
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class Commands < CommandBase
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module CommandHelpers
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private
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def try_to_load_pry_doc
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# YARD crashes on rbx, so do not require it
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if !Object.const_defined?(:RUBY_ENGINE) || RUBY_ENGINE !~ /rbx/
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require "pry-doc"
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end
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rescue LoadError
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end
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def meth_name_from_binding(b)
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meth_name = b.eval('__method__')
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if [:__script__, nil, :__binding__, :__binding_impl__].include?(meth_name)
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nil
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else
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meth_name
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end
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end
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def set_file_and_dir_locals(file_name)
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return if !target
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$_file_temp = File.expand_path(file_name)
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$_dir_temp = File.dirname($_file_temp)
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target.eval("_file_ = $_file_temp")
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target.eval("_dir_ = $_dir_temp")
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end
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def add_line_numbers(lines, start_line)
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line_array = lines.each_line.to_a
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line_array.each_with_index.map do |line, idx|
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adjusted_index = idx + start_line
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if Pry.color
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cindex = CodeRay.scan("#{adjusted_index}", :ruby).term
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"#{cindex}: #{line}"
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else
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"#{idx}: #{line}"
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end
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end.join
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end
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# if start_line is not false then add line numbers starting with start_line
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def render_output(should_flood, start_line, doc)
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if start_line
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doc = add_line_numbers(doc, start_line)
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end
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if should_flood
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output.puts doc
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else
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stagger_output(doc)
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end
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end
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def check_for_dynamically_defined_method(meth)
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file, _ = meth.source_location
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if file =~ /(\(.*\))|<.*>/
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raise "Cannot retrieve source for dynamically defined method."
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end
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end
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def remove_first_word(text)
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text.split.drop(1).join(' ')
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end
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# turn off color for duration of block
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def no_color(&block)
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old_color_state = Pry.color
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Pry.color = false
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yield
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ensure
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Pry.color = old_color_state
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end
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def code_and_code_type_for(meth)
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case code_type = code_type_for(meth)
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when nil
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return nil
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when :c
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code = Pry::MethodInfo.info_for(meth).source
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code = strip_comments_from_c_code(code)
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when :ruby
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code = strip_leading_whitespace(meth.source)
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set_file_and_dir_locals(meth.source_location.first)
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end
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[code, code_type]
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end
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def doc_and_code_type_for(meth)
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case code_type = code_type_for(meth)
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when nil
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return nil
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when :c
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doc = Pry::MethodInfo.info_for(meth).docstring
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when :ruby
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doc = meth.comment
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doc = strip_leading_hash_and_whitespace_from_ruby_comments(doc)
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set_file_and_dir_locals(meth.source_location.first)
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end
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[doc, code_type]
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end
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def get_method_object(meth_name, target, options)
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if !meth_name
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return nil
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end
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if options[:M]
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target.eval("instance_method(:#{meth_name})")
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elsif options[:m]
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target.eval("method(:#{meth_name})")
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else
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begin
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target.eval("instance_method(:#{meth_name})")
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rescue
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begin
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target.eval("method(:#{meth_name})")
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rescue
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return nil
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end
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end
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end
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end
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def make_header(meth, code_type, content)
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num_lines = "Number of lines: #{bold(content.each_line.count.to_s)}"
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case code_type
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when :ruby
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file, line = meth.source_location
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"\n#{bold('From:')} #{file} @ line #{line}:\n#{num_lines}\n\n"
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else
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file = Pry::MethodInfo.info_for(meth).file
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"\n#{bold('From:')} #{file} in Ruby Core (C Method):\n#{num_lines}\n\n"
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end
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end
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def is_a_c_method?(meth)
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meth.source_location.nil?
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end
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def should_use_pry_doc?(meth)
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Pry.has_pry_doc && is_a_c_method?(meth)
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end
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def code_type_for(meth)
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# only C methods
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if should_use_pry_doc?(meth)
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info = Pry::MethodInfo.info_for(meth)
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if info && info.source
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code_type = :c
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else
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output.puts "Cannot find C method: #{meth.name}"
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code_type = nil
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end
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else
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if is_a_c_method?(meth)
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output.puts "Cannot locate this method: #{meth.name}. Try `gem install pry-doc` to get access to Ruby Core documentation."
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code_type = nil
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else
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check_for_dynamically_defined_method(meth)
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code_type = :ruby
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end
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end
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code_type
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end
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def file_map
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{
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[".c", ".h"] => :c,
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[".cpp", ".hpp", ".cc", ".h", "cxx"] => :cpp,
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[".rb", "Rakefile", ".irbrc", ".gemspec", ".pryrc"] => :ruby,
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".py" => :python,
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".diff" => :diff,
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".css" => :css,
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".html" => :html,
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[".yaml", ".yml"] => :yaml,
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".xml" => :xml,
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".php" => :php,
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".js" => :javascript,
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".java" => :java,
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".rhtml" => :rhtml,
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".json" => :json
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}
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end
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def syntax_highlight_by_file_type_or_specified(contents, file_name, file_type)
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_, language_detected = file_map.find do |k, v|
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Array(k).any? do |matcher|
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matcher == File.extname(file_name) || matcher == File.basename(file_name)
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end
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end
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language_detected = file_type if file_type
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CodeRay.scan(contents, language_detected).term
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end
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# convert negative line numbers to positive by wrapping around
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# last line (as per array indexing with negative numbers)
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def normalized_line_number(line_number, total_lines)
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line_number < 0 ? line_number + total_lines : line_number
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end
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# returns the file content between the lines and the normalized
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# start and end line numbers.
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def read_between_the_lines(file_name, start_line, end_line)
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content = File.read(File.expand_path(file_name))
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lines_array = content.each_line.to_a
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[lines_array[start_line..end_line].join, normalized_line_number(start_line, lines_array.size),
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normalized_line_number(end_line, lines_array.size)]
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end
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# documentation related helpers
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def strip_color_codes(str)
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str.gsub(/\e\[.*?(\d)+m/, '')
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end
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def process_rdoc(comment, code_type)
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comment = comment.dup
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comment.gsub(/<code>(?:\s*\n)?(.*?)\s*<\/code>/m) { Pry.color ? CodeRay.scan($1, code_type).term : $1 }.
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gsub(/<em>(?:\s*\n)?(.*?)\s*<\/em>/m) { Pry.color ? "\e[32m#{$1}\e[0m": $1 }.
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gsub(/<i>(?:\s*\n)?(.*?)\s*<\/i>/m) { Pry.color ? "\e[34m#{$1}\e[0m" : $1 }.
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gsub(/\B\+(\w*?)\+\B/) { Pry.color ? "\e[32m#{$1}\e[0m": $1 }.
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gsub(/((?:^[ \t]+.+(?:\n+|\Z))+)/) { Pry.color ? CodeRay.scan($1, code_type).term : $1 }.
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gsub(/`(?:\s*\n)?(.*?)\s*`/) { Pry.color ? CodeRay.scan($1, code_type).term : $1 }
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end
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def process_yardoc_tag(comment, tag)
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in_tag_block = nil
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output = comment.lines.map do |v|
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if in_tag_block && v !~ /^\S/
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strip_color_codes(strip_color_codes(v))
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elsif in_tag_block
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in_tag_block = false
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v
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else
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in_tag_block = true if v =~ /^@#{tag}/
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v
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end
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end.join
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end
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def process_yardoc(comment)
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yard_tags = ["param", "return", "option", "yield", "attr", "attr_reader", "attr_writer",
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"deprecate", "example"]
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(yard_tags - ["example"]).inject(comment) { |a, v| process_yardoc_tag(a, v) }.
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gsub(/^@(#{yard_tags.join("|")})/) { Pry.color ? "\e[33m#{$1}\e[0m": $1 }
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end
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def process_comment_markup(comment, code_type)
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process_yardoc process_rdoc(comment, code_type)
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end
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# strip leading whitespace but preserve indentation
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def strip_leading_whitespace(text)
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return text if text.empty?
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leading_spaces = text.lines.first[/^(\s+)/, 1]
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text.gsub(/^#{leading_spaces}/, '')
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end
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def strip_leading_hash_and_whitespace_from_ruby_comments(comment)
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comment = comment.dup
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comment.gsub!(/\A\#+?$/, '')
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comment.gsub!(/^\s*#/, '')
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strip_leading_whitespace(comment)
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end
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def strip_comments_from_c_code(code)
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code.sub /\A\s*\/\*.*?\*\/\s*/m, ''
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end
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def prompt(message, options="Yn")
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opts = options.scan(/./)
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optstring = opts.join("/") # case maintained
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defaults = opts.select{|o| o.upcase == o }
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opts = opts.map{|o| o.downcase}
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raise "Error: Too many default values for the prompt: #{default.inspect}" if defaults.size > 1
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default = defaults.first
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loop do
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response = Pry.input.readline("#{message} (#{optstring}) ").downcase
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case response
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when *opts
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return response
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when ""
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return default.downcase
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else
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output.puts " |_ Invalid option: #{response.inspect}. Try again."
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end
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end
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end
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end
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end
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end
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