Reline behaves oddly with redirect (nontty output) #616

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1. ima1zumi

   added

   bugSomething isn't workingSomething isn't working

   on Dec 11, 2023
2. tompng commented on Dec 11, 2023

   

   tompng

   on Dec 11, 2023

   Last edited by tompng

   Member

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   I think it is Reline's bug. Reline's output should make the terminal screen to show:

   >foo
   foo
   

   My understanding is that Reline does not aim to output exactly the same byte sequence as Readline. Reline's output can contain escape sequences or control characters like "\r>\r>f\r>foo\nfoo\n". Fixing this bug might not make the mentioned test pass.

   Note that Readline's output sometimes contains different escape sequence depending on version or environment.

   printf "ruby\x01\x04R\n" | ruby -rreadline -e 'puts Readline.readline(">")'
   # output(readline 8.2): ">ruby\r\e[C\e[1Puby\r\e[CRuby\b\b\b\nRuby\n"
   # output(readline 8.1): ">ruby\r>\e[1P\e[1@R\nRuby\n"
   # terminal screen: ">Ruby\nRuby\n"
3. mvz

   added 3 commits that reference this issue on Dec 17, 2023

   Depend on readline-ext to get proper behavior of pry prompt

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   306b18d

   Require readline-ext when testing with Ruby 3.3

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   801284c

   Use plain irb in debugging scenario

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   bdf5ede
4. dgutov

   added a commit that references this issue on Mar 22, 2024

   Switch to StdioInputMethod when TERM is 'dumb'

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   f04a184
5. tompng

   added a commit that references this issue on May 1, 2024

   Switch to StdioInputMethod when TERM is 'dumb' (#907)

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   241e061
6. tompng

   closed this as completedon Sep 22, 2024