Error on Fedora 34: cannot load such file -- rexml/document

[Ambrevar]

I've installed fpm in Fedora 34 Docker with

sudo gem install --no-document fpm

When I try to package an .rpm, it yields the following stacktrace:

<internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- rexml/document (LoadError)
	from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:85:in `require'
	from /usr/local/share/gems/gems/fpm-1.12.0/lib/fpm/package/osxpkg.rb:7:in `<top (required)>'
	from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:85:in `require'
	from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:85:in `require'
	from /usr/local/share/gems/gems/fpm-1.12.0/lib/fpm.rb:15:in `<top (required)>'
	from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:85:in `require'
	from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:85:in `require'
	from /usr/local/share/gems/gems/fpm-1.12.0/bin/fpm:4:in `<top (required)>'
	from /usr/local/bin/fpm:23:in `load'
	from /usr/local/bin/fpm:23:in `<main>'

The command I've invoked is

"fpm" "-s" "dir" "-t" "rpm" "--maintainer=Atlas Engineer LLC"
               "--license=BSD 3-Clause"
               "--description=Extensible web-browser in Common Lisp"
               "--url=https://nyxt.atlas.engineer" "--depends=glib-networking"
               "--depends=gsettings-desktop-schemas" "--depends=xclip"
               "--depends=enchant" "--depends=notify-osd" "--depends=glibc"
               "--depends=zlib" "--depends=webkit2gtk3" "--depends=gtk3"
               "--depends=gtk3" "--depends=pango" "--depends=pango"
               "--depends=cairo" "--depends=gdk-pixbuf2" "--depends=glib2"
               "--depends=glib2" "--depends=glib2" "--depends=glib2"
               "--depends=libfixposix-devel" "--depends=openssl-libs" "-n"
               "nyxt" "-v" "2" "nyxt=/usr/bin/"
               "assets/nyxt.desktop=usr/share/applications/"
               "assets/nyxt_16x16.png=usr/share/icons/hicolor/16x16/apps/nyxt.png"
               "assets/nyxt_32x32.png=usr/share/icons/hicolor/32x32/apps/nyxt.png"
               "assets/nyxt_128x128.png=usr/share/icons/hicolor/128x128/apps/nyxt.png"
               "assets/nyxt_256x256.png=usr/share/icons/hicolor/256x256/apps/nyxt.png"
               "assets/nyxt_512x512.png=usr/share/icons/hicolor/512x512/apps/nyxt.png"

Any idea?

[aanno]

Did you tried dnf install rubygem-rexml? fpm is a bit tricky to install (but it's running on my f34 machine)...

[Ambrevar]

It worked, thanks!

[Kastakin]

Solved the same issue on an Arch based machine with pacman -S ruby-rexml

[jordansissel]

Curious -- Are you using ruby 3.0.0 or newer? Ruby made some changes specific to rexml that can cause this error. If you're hitting this error on Ruby 3.0.0 or newer, please let me know here.

I added a fix for Ruby 3.0.0 that should help: #1794

[Ambrevar]

According to this page, https://src.fedoraproject.org/rpms/ruby Fedora 34 uses Ruby 3.0.1.

[Kastakin]

It seems arch is using a similar version:

https://archlinux.org/packages/extra/x86_64/ruby/

[jordansissel]

#1950 merged and should resolve this. Let me know if it's not working :)

[jordansissel]

fpm 1.15.0 is released and, I believe, has resolve this issue. Please let me know if you find otherwise in a new issue (if a new problem) or this issue (if same problem)