fliiiix/ruby30-on-freebsd.md

## ruby30-on-freebsd.md

      
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              ruby30-on-freebsd.md
            
          
    Issue

Gems don't install if you try to use:
cat /etc/make.conf 
DEFAULT_VERSIONS= ruby=3.0

The example port used to show this is devel/rubygems-racc.
ruby-gems

A patch to upgrade ruby-gems to can be found here https://gist.github.com/fliiiix/be69eb8e56ef6aac273167f469aecb26
One issue still persisting is that no spec files can be found meaing they are extracted wrong?
devel/ruby-gems should be probably be updatet to something newer or at least this patch should be applied https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253104
gem install

For some reason gem install stoped creating a spec, cache and doc dir.
A quick fix is in Mk/Uses/gem.mk to patch this:
-GEMSPEC=       ${PORTNAME}.gemspec
+GEMSPEC=       ${PORTNAME}-${PORTVERSION}.gemspec

...

 do-install:
+       @(mkdir -p ${STAGEDIR}${PREFIX}/${SPEC_DIR})
+       @(mkdir -p ${STAGEDIR}${PREFIX}/${CACHE_DIR})
+       @(mkdir -p ${STAGEDIR}${PREFIX}/${DOC_DIR})

The real fix should probably fix ? devel/ruby-gems ? in a way gem install ensures the creation of this directories
at least that is the assumption since it worked for ruby27 and it works for ruby30 on linux.