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On Ubuntu 22.04 LTS, I can install Rakudo (formerly known as Perl 6) like this:

sudo apt install rakudo

Then when I run raku on the command-line, I get this output:

$ raku
Welcome to Rakudo™ v2022.02.
Implementing the Raku® Programming Language v6.d.
Built on MoarVM version 2022.02.

You may want to `zef install Readline`, `zef install Linenoise`, or `zef install Terminal::LineEditor` or use rlwrap for a line editor

To exit type 'exit' or '^D'
>

I do want to have line editing features for the Raku REPL. What is the best option here for Ubuntu? Should I install a package with zef or with sudo apt? Where do the packages get installed and how do I undo that?

If I try to run zef, I get a command not found error. If I run sudo apt install perl6-zef, I get this error:

E: Unable to locate package perl6-zef
Flimm
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    It seems this package got caught in an unfortunate gap - `perl6-zef` was replaced by `raku-zef` in Debian, but the import from Debian for Ubuntu 22.04 took place at a time when the former was gone and the latter not added yet. – muru Aug 09 '22 at 08:29
  • I forgot that I asked a similar question for Ubuntu 21.10: https://askubuntu.com/q/1402248/2355 However, the solution doesn't work for Ubuntu 22.04, since the `perl6-zef` package doesn't exist in Ubuntu 22.04 – Flimm Aug 09 '22 at 09:22

2 Answers2

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I think the best answer right now, unfortunately, is to install rakudo from https://rakudo.org/downloads, then install zef from https://github.com/ugexe/zef, and then use zef to install Readline.

Mark Reed
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https://rakudo.org/downloads had the most current binary images. Download, untar and fix your PATH.

Fritz
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    Hi Fritz! That's great that Rakudo provides binary exectuables that can be downloaded. However, when I run `raku`, I notice that it doesn't have readline support, I still get the message "You may want to `zef install Readline`". However, the download does not include `zef`. – Flimm Aug 15 '22 at 21:55