mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
88de87c295
There actually are some libraries that requires 'irb' such as byebug, and when 'irb' is required, it requires irb/src_encoding.rb, then it defines the toplevel default_src_encoding method that is visible from anywhere in the end users' apps. Here's a quick oneliner that shows what's happening. % ruby -rpry-byebug -e 'p private_methods(false)' [:include, :using, :define_method, :public, :private, :DelegateClass, :default_src_encoding] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59090 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
38 lines
928 B
Ruby
38 lines
928 B
Ruby
# frozen_string_literal: false
|
|
module IRB
|
|
class << (MagicFile = Object.new)
|
|
# see parser_magic_comment in parse.y
|
|
ENCODING_SPEC_RE = %r"coding\s*[=:]\s*([[:alnum:]\-_]+)"
|
|
|
|
def open(path)
|
|
io = File.open(path, 'rb')
|
|
line = io.gets
|
|
line = io.gets if line[0,2] == "#!"
|
|
encoding = detect_encoding(line)
|
|
internal_encoding = encoding
|
|
encoding ||= IRB.default_src_encoding
|
|
io.rewind
|
|
io.set_encoding(encoding, internal_encoding)
|
|
|
|
if block_given?
|
|
begin
|
|
return (yield io)
|
|
ensure
|
|
io.close
|
|
end
|
|
else
|
|
return io
|
|
end
|
|
end
|
|
|
|
private
|
|
def detect_encoding(line)
|
|
return unless line[0] == ?#
|
|
line = line[1..-1]
|
|
line = $1 if line[/-\*-\s*(.*?)\s*-*-$/]
|
|
return nil unless ENCODING_SPEC_RE =~ line
|
|
encoding = $1
|
|
return encoding.sub(/-(?:mac|dos|unix)/i, '')
|
|
end
|
|
end
|
|
end
|