[Rubygems-developers] error when irb not installed

Chad Woolley thewoolleyman at gmail.com
Wed Dec 27 17:52:39 EST 2006

I agree.  Packagers should just install the full ruby install.  Debian
had these same problems, I don't know if they fixed it, because I
always install from source now.

I know the argument is that there's some stuff you may not want on a
server install for security reasons, but that should be a special
package for people who actually care (in other words, sysadmins who
should probably be building from source anyway).  For the other 99% of
us who want a full "just works" install on every machine, the full
install should be the default.

-- Chad

On 12/27/06, Eric Hodel <drbrain at segment7.net> wrote:
> On Dec 27, 2006, at 05:08, Jim Freeze wrote:
> > On Dec 27, 2006, at 1:38 AM, Eric Hodel wrote:
> >> On Dec 26, 2006, at 21:20, Jim Freeze wrote:
> >>> Should I be getting an error when installing a gem on
> >>> a machine that irb is not installed on?
> >>
> >> Yes.  Rubygems requires all of ruby to be installed.
> >
> > Maybe it should more gracefully fail. I was using CentOS at the
> > time, and had installed ruby with 'yum install ruby'. It is an
> > additional
> > install 'yum install irb' to get irb. :(
> Ruby's `make install` installs everything.  There is no make target
> (or other built-in command) that will only install this standard
> library file or that standard library file for ruby.
> Adding hacky code to detect a hacky ruby install isn't maintainable.
> Today irb is missing, but tomorrow it might be that they've cut out
> thread.rb or OpenURI or ...
> RubyGems is set up by default to give you RDoc and ri data that you
> can use right away.  Its fairly common knowledge that gem_server
> allows you to look at the RDoc for all of your gems.  Attempting to
> degrade gracefully is going to confuse users.
> Instead of saying:
> "since you installed ruby from the ABC distribution you need to first
> install X, Y, and Z, then run `gem rdoc` for all your gems."
> and maintaining a table of distributions and commands necessary to
> install all of ruby and hacks to figure out what to do if some part
> of the standard library is missing.
> We can say:
> "irb is part of ruby.  If you don't have irb with your ruby it is
> broken.  Figure out how to install irb for ABC distribution then
> RubyGems will work.  Be sure to file a bug with your distribution for
> shipping a broken ruby, too."
> and leave things as they are.
> The error you got is pretty clear:
> No such file to load -- irb/slex (LoadError)
> I would file a bug with CentOS.  My /usr/local/lib/ruby/1.8 is all of
> 6.7M, so installing the standard library as it ships is not onerous.
> --
> Eric Hodel - drbrain at segment7.net - http://blog.segment7.net
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