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# frozen_string_literal: true
require_relative "nop"
require_relative "../source_finder"
require_relative "../pager"
require_relative "../color"
module IRB
module ExtendCommand
class ShowSource < Nop
category "Context"
description "Show the source code of a given method or constant."
class << self
def transform_args(args)
# Return a string literal as is for backward compatibility
if args.empty? || string_literal?(args)
args
else # Otherwise, consider the input as a String for convenience
args.strip.dump
end
end
end
def execute(str = nil)
unless str.is_a?(String)
puts "Error: Expected a string but got #{str.inspect}"
return
end
source = SourceFinder.new(@irb_context).find_source(str)
if source
show_source(source)
else
puts "Error: Couldn't locate a definition for #{str}"
end
nil
end
private
def show_source(source)
file_content = IRB::Color.colorize_code(File.read(source.file))
code = file_content.lines[(source.first_line - 1)...source.last_line].join
content = <<~CONTENT
#{bold("From")}: #{source.file}:#{source.first_line}
#{code}
CONTENT
Pager.page_content(content)
end
def bold(str)
Color.colorize(str, [:BOLD])
end
end
end
end
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