Missing ERB dependency on Arch (Cannot load such file -- erb)

Overview

I've tried to run the GDK one-line installation on Arch Linux, and it fails to compile the different ruby versions during the bootstrap phase:

-> ./configure "--prefix=$HOME/.asdf/installs/ruby/3.2.4" --enable-shared --with-ext=openssl,psych,+
-> make -j 4

BUILD FAILED (Arch Linux  on x86_64 using ruby-build 20250215)

You can inspect the build directory at /tmp/ruby-build.20250220111753.164246.iundUZ
See the full build log at /tmp/ruby-build.20250220111753.164246.log

Looking at the build logs, one can spot the following error:

[...]
building Rust YJIT (release mode)
/bin/sh ./tool/ifchange "--timestamp=.rbconfig.time" rbconfig.rb rbconfig.tmp
rbconfig.rb updated
compiling dln.c
compiling localeinit.c
creating verconf.h
./tool/generic_erb.rb:6:in `require': cannot load such file -- erb (LoadError)
	from ./tool/generic_erb.rb:6:in `<main>'
make[1]: *** [uncommon.mk:1058: verconf.h] Error 1
make[1]: *** Waiting for unfinished jobs....

Based on further investigation, and mainly thanks to a ruby-build issue, I noticed that it is sufficient to install ERB via the distro package manager to fix the issue:

sudo pacman -S ruby-erb

Impacted categories

The following categories relate to this issue:

• gdk-reliability - e.g. When a GDK action fails to complete.
• gdk-usability - e.g. Improvements or suggestions around how the GDK functions.
• gdk-performance - e.g. When a GDK action is slow or times out.

Steps to replicate (optional)

• Ensure ruby-erb is NOT installed locally as part of a distro package
• Run the GDK one-line installation
• Notice the compilation issues when the bootstrap phase tries to compile the different ruby versions
• Install ruby-erb via the distro package manager
• Run make bootstrap or the whole one-line installation again
• Ruby versions should be compiled successfully

Proposal (optional)

I could not yet conclude if this is a generic issue or only caused by my machine. Though I'd propose, if ruby-erb indeed needs to be provided by the OS, the following possible options:

• Add an entry to the troubleshooting/ruby section (happy to contribute that with a MR)
• Include a check and/or installation step in the bootstrap phase to install the missing dependencies
  • Alternatively instruct the users to install the missing dependency

Environment (optional)

• Operating system name: Linux 6.13.2-arch1-1 #1 SMP PREEMPT_DYNAMIC Sat, 08 Feb 2025 18:54:55 +0000 x86_64 GNU/Linux
• Architecture: x86_64
• gdk.yml

  ---
  asdf:
    opt_out: false

• Ruby version: ruby 3.3.7 (2025-01-15 revision be31f993d7) [x86_64-linux]
• GDK version: d41ad4c2