[gentoo-user] Re: emerge v gem for rails

[Hans de Graaff]

On Sat, 24 Nov 2007 05:30:14 +0000, Thufir wrote:

> I'm running into some error messages from rails when running "script/
> generate controller foo" and am wondering if it's related to package
> management, a mismatch between gems and emerge.  Do not use gems, use
> emerge?  The wiki is incorrect?

I'd consider the wiki in general to be a good first source of information 
but certainly not accurate. Usually this is because the page is created 
at some point but not properly maintained or reviewed. In this case the 
mention of Rails 1.1 and not Rails 1.2 is a dead giveaway that this page 
is outdated.

> The gentoo wiki, <http://gentoo-wiki.com/HOWTO_RoR>, says to:
>
>  emerge -av sqlite3-ruby
>  gem install sqlite3-ruby

You really don't want to do both of these. In fact, emerging the sqlite3-
ruby already installs the gem version, so running 'gem install sqlite3-
ruby' will at best have no effect and at worst confuse emerge at a later 
stage.

> So, it looks like the version of sqlite3-ruby installed matches the
> instructions at the wiki, but the version number doesn't seem to match
> what's available through "gem"; and the wiki specifically states to
> install the gem.

The wiki instructions are non-sense. I guess that this originates from 
the fact that we install some packages in site-ruby which means that gem 
dependencies don't always work, aka bug https://bugs.gentoo.org/
show_bug.cgi?id=196036

In this particular case the instruction is nonsense since portage already 
installs the gem.

> The error I'm running into may be totally unrelated to this.  It seems a
> bit odd to me that sqlite3-ruby must be emerged through portage and that
> gem must install it as well -- one or the other would seem to be
> sufficient.

Good thinking. :-)

Without showing us the error we can't help you with that, though.

Kind regards,

Hans

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