[MacPorts] RubySection added

MacPorts noreply at macports.org
Fri Apr 10 10:31:54 PDT 2009

Added page "RubySection" by febeling at macports.org from*
Page URL: <http://trac.macports.org/wiki/RubySection>
''This is an early stage version of a page we could introduce for every major group of ports which should follow certain common principles, and where the involved maintainers can collect the results. I suggest introducing it as well for Python, Perl, Erlang, and similar cases, if it turns out to be useful.''

== Ruby Section ==

This page describes the general organization of the ruby section. It contains information about Ruby implementations
and the library packages, and how they are generally used in MacPorts. It should address things like naming conventions, dealing with different versions of the
language implementatin and how it works together with the package manager {{{gem}}} and other installation methods.

== Guidelines for Ruby Ports ==
 * should have a name prefix of "rb" for 1.8, and "rb19" for 1.9. It would be nice to have ports compatible with both, but that is not possible, since the library paths for ruby get determined during configuration phase and are specific for the different versions.

== Problems & Potential Improvements ==

 * many ruby library ports are installed by invoking the Rubygems installer program {{{gem}}}. Since that is just a regular command line tool, a package installed as port can be uninstalled or upgraded using {{{gem}}} directly. That results in an unconsistent state of the registry, because a certain version of some software is marked as installed, while in fact it isn't or not in that version. This should be solved in some way, maybe by installing in a special location of that is possible.
 * There are a number of ruby implementations available, but currently only Matz' Ruby 1.8.7 is invokable just as {{{ruby}}}, or Matz' Ruby 1.9.1 is installed with variant {{{+nosuffix}}}. The variant causes ruby 1.9 to install withuout the suffix, but that makes it conflict with port {{{ruby}}}, i.e. 1.8.7. On the list Brett Eisenberg has suggested fixing that using the same approach as python_select and gcc_select, i.e. by writing configuration symlinks in a PATH location. 
 * To be discussed: should be library ports for ruby generally be avoided in favor of the now ubiquitous gem (part of the 1.9 release)? As said, gems easily break the repositories consistency if packages are not managed exclusively over {{{port}}} or {{{gem}}}.

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