gistfile1.txt

V:\fóñè>ruby -v
ruby 1.9.4dev (2011-09-07 trunk 33212) [i386-mingw32]

V:\fóñè>chcp 1252
Active code page: 1252

V:\fóñè>ruby -e "puts Encoding.default_external"
Windows-1252

V:\fóñè>irb
irb(main):001:0> a = File.expand_path "."
=> "V:/fóñè"
irb(main):002:0> a.encoding
=> #<Encoding:Windows-1252>
irb(main):003:0> b = Dir.glob("../*").first
=> "../fóñè"
irb(main):004:0> b.encoding
=> #<Encoding:Windows-1252>
irb(main):005:0> File.expand_path b
=> "V:/fóñè"
irb(main):006:0> c = File.expand_path b
=> "V:/fóñè"
irb(main):007:0> c.encoding
=> #<Encoding:Windows-1252>
irb(main):008:0> d = File.join(a, "foo")
=> "V:/f\xF3\xF1\xE8/foo"
irb(main):009:0> d.encoding
=> #<Encoding:ASCII-8BIT>                          # <= FUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
irb(main):010:0> e = "#{a}/foo"
=> "V:/fóñè/foo"
irb(main):011:0> e.encoding
=> #<Encoding:Windows-1252>
irb(main):012:0> File.open(d, "w+") { |f| f.puts "hi" }
Errno::ENOENT: No such file or directory - V:/fóñè/foo       # <= W.T.F.????
        from (irb):12:in `initialize'
        from (irb):12:in `open'
        from (irb):12
        from C:/Users/Luis/Tools/Ruby/ruby-head-i386-mingw32/bin/irb:12:in `<main>'
irb(main):013:0> File.open(e, "w+") { |f| f.puts "hi" }
Errno::ENOENT: No such file or directory - V:/fóñè/foo       # <= W.T.F. * 20!
        from (irb):13:in `initialize'
        from (irb):13:in `open'
        from (irb):13
        from C:/Users/Luis/Tools/Ruby/ruby-head-i386-mingw32/bin/irb:12:in `<main>'
irb(main):014:0>