Created attachment 460836 [details] emerge --info On a clean system (no prior ruby installed), I have specified: RUBY_TARGETS="ruby24" and package.use: dev-lang/ruby doc dev-ruby/rake doc 'emerge ruby' builds rake before rdoc. rake fails promptly: >>> Emerging (11 of 18) dev-ruby/rake-12.0.0::gentoo * rake-12.0.0.tar.gz SHA256 SHA512 WHIRLPOOL size ;-) ... [ ok ] >>> Unpacking source... * Running unpack phase for all ... >>> Unpacking rake-12.0.0.tar.gz to /var/tmp/portage/dev-ruby/rake-12.0.0/work/all >>> Source unpacked in /var/tmp/portage/dev-ruby/rake-12.0.0/work >>> Preparing source in /var/tmp/portage/dev-ruby/rake-12.0.0/work ... * Running prepare phase for all ... * Running source copy phase for ruby24 ... >>> Source prepared. >>> Configuring source in /var/tmp/portage/dev-ruby/rake-12.0.0/work ... >>> Source configured. >>> Compiling source in /var/tmp/portage/dev-ruby/rake-12.0.0/work ... * Running compile phase for all ... /var/tmp/portage/dev-ruby/rake-12.0.0/temp/environment: line 657: rdoc: command not found It does not work to oneshot rdoc since it requires rake. The workaround will be to build without rake[doc] and then build rake again with it. It looks like this a known problem: https://bugs.gentoo.org/show_bug.cgi?id=450420 ... but still not a good user experience. A solution might be: rake[doc] builds rake without docs PDEPEND on rake-docs rdoc DEPEND on rake rake-docs DEPEND on rdoc This requires an extra package, but it would fix the circular dependency and automates the workaround that users must re-discover and manually execute. If nothing else, a pkg_setup in rake could detect rdoc's absence and alert the user to workaround steps before failing. Thanks.
