I'm using a custom-made prompt which is implemented as a command. It uses ANSI escape codes and spans 2 lines. I have rash set up to use the readline-gpl library. This is my attempt at configuring this in rash:

#lang rash
(require
  racket/port
  rash/private/rashrc-lib
  readline/pread)

(current-prompt-function
  (λ ()
    (readline-prompt #{prompt show 0 insert |> port->bytes})))

The issue is that readline seems to filter out the ANSI escapes as well as newlines. The following screenshot illustrates how this prompt looks in fish as well as how it ends up looking in rash: How can I make the prompt display correctly, while also remaining compatible with readline?

Is the prompt command you are using available somewhere? If I put that same code in a repl, or in rashrc.rkt or rashrc but replace the prompt show 0 insert command with echo -n -e "\e[39;42mhello\e[0m\n>", I get a hello with a green background like I expect on the first line, then a > on the second line. So I'm not immediately able to reproduce this.

What operating system are you using?

I'm running Arch Linux. I wrote the prompt myself, the source is available here. However, I wouldn't recommend building it, as it requires a pretty exotic compiler toolchain, and the build system is currently broken anyways. I doubt my command produces incorrect output, as there are no checks in place, and if I run prompt show 0 insert | cat (which would make a potential isatty call return false), it still shows ANSI escapes.

If I adjust my config with your echo command, I still get broken output:

39;42mhello[0m>

Looks like I had incorrectly installed the readline-gpl package, causing the wrong library to be used. Sorry about that!

I'd like to integrate the exit code of the previous command into my prompt, but I currently can't find any functions to get it, or any information that allows me to tell whether the last command ran was successful.

There are optional keyword arguments for the prompt function. When displaying the prompt, the Rash repl tests the prompt function's keyword arity to see which of the arguments to apply. So you can add the #:last-return-value keyword to get it. See this documentation: https://docs.racket-lang.org/rash/index.html#%28def._%28%28lib._rash%2Fmain..rkt%29._current-prompt-function%29%29

Thanks! I Must've missed that!

• 42460a28 officially change license to MIT/Apache2.0 […]

When using auto-completion on files/directories, ] is not automatically escaped but [ is:

For that last line, I typed rm test and hit tab. Not sure if this is a duplicate of #85, apologies if so.