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comp.lang.ruby

webby, ubuntu and gems

Martin DeMello

6/10/2008 8:10:00 AM

I've recently switched distributions to ubuntu, and I'm having
problems getting webby up and running. (I suspect this a general
problem with gems that need to install executables). I ran gem install
webby, and it installed happily enough into
/var/lib/gems/1.8/gems/webby-0.8.4/, but didn't install the webby
executable anywhere in path. I checked for an ubuntu package, but
there wasn't one. Of course, I could simply install it all by hand,
but that seems like the wrong thing to do - I'd rather figure out how
to get my gems playing nicely with ubuntu.

ruby -v: ruby 1.8.6 (2007-09-24 patchlevel 111) [i486-linux]
gem -v: 0.9.4
/etc/lsb-release:DISTRIB_CODENAME=hardy

martin
14 Answers

David Masover

6/10/2008 8:52:00 AM

0

On Tuesday 10 June 2008 03:10:20 Martin DeMello wrote:
> I've recently switched distributions to ubuntu, and I'm having
> problems getting webby up and running. (I suspect this a general
> problem with gems that need to install executables). I ran gem install
> webby, and it installed happily enough into
> /var/lib/gems/1.8/gems/webby-0.8.4/, but didn't install the webby
> executable anywhere in path.

Check /var/lib/gems/1.8/bin -- and you may want to add that to your path.

Leslie Viljoen

6/10/2008 12:59:00 PM

0

On Tue, Jun 10, 2008 at 10:51 AM, David Masover <ninja@slaphack.com> wrote:
> On Tuesday 10 June 2008 03:10:20 Martin DeMello wrote:
>> I've recently switched distributions to ubuntu, and I'm having
>> problems getting webby up and running. (I suspect this a general
>> problem with gems that need to install executables). I ran gem install
>> webby, and it installed happily enough into
>> /var/lib/gems/1.8/gems/webby-0.8.4/, but didn't install the webby
>> executable anywhere in path.
>
> Check /var/lib/gems/1.8/bin -- and you may want to add that to your path.

My webby executable ended up in /usr/bin/webby. I installed gems via the
deb package (wajig install rubygems).

I have Ubuntu 8.04

Les

miles.sterrett@gmail.com

6/10/2008 2:47:00 PM

0

On Jun 10, 4:10 am, Martin DeMello <martindeme...@gmail.com> wrote:
> I've recently switched distributions to ubuntu, and I'm having
> problems getting webby up and running. (I suspect this a general
> problem with gems that need to install executables). I ran gem install
> webby, and it installed happily enough into
> /var/lib/gems/1.8/gems/webby-0.8.4/, but didn't install the webby
> executable anywhere in path. I checked for an ubuntu package, but
> there wasn't one. Of course, I could simply install it all by hand,
> but that seems like the wrong thing to do - I'd rather figure out how
> to get my gems playing nicely with ubuntu.
>
> ruby -v: ruby 1.8.6 (2007-09-24 patchlevel 111) [i486-linux]
> gem -v: 0.9.4
> /etc/lsb-release:DISTRIB_CODENAME=hardy
>
> martin

I am running Ubuntu 8.04. I installed RubyGems from source. I just
installed webby, and it placed an executable file in /usr/bin.

Incidentally, it is acceptable, if not recommended, to install
RubyGems from source. Because RubyGems can update itself, you can run
into issues with both apt/aptitude/Synaptic and RubyGems trying to
update RubyGems.

It may be advantageous for you to post the results of 'echo $PATH' and
'sudo find / -name "webby"'.

Good luck.

MilesZS

Martin DeMello

6/10/2008 4:14:00 PM

0

On Tue, Jun 10, 2008 at 7:49 AM, miles.sterrett@gmail.com
<miles.sterrett@gmail.com> wrote:
>
> I am running Ubuntu 8.04. I installed RubyGems from source. I just
> installed webby, and it placed an executable file in /usr/bin.

The apt-got rubygems placed the executable in /var/lib/gems/1.8/bin/,
which it does seem to have done for all my other gems as well.

> Incidentally, it is acceptable, if not recommended, to install
> RubyGems from source. Because RubyGems can update itself, you can run
> into issues with both apt/aptitude/Synaptic and RubyGems trying to
> update RubyGems.

Thanks, will try that.

martin

Martin DeMello

6/10/2008 4:15:00 PM

0

On Tue, Jun 10, 2008 at 1:51 AM, David Masover <ninja@slaphack.com> wrote:
> On Tuesday 10 June 2008 03:10:20 Martin DeMello wrote:
>> I've recently switched distributions to ubuntu, and I'm having
>> problems getting webby up and running. (I suspect this a general
>> problem with gems that need to install executables). I ran gem install
>> webby, and it installed happily enough into
>> /var/lib/gems/1.8/gems/webby-0.8.4/, but didn't install the webby
>> executable anywhere in path.
>
> Check /var/lib/gems/1.8/bin -- and you may want to add that to your path.

Thanks, that was it :)

martin

Martin DeMello

6/10/2008 4:17:00 PM

0

On Tue, Jun 10, 2008 at 5:59 AM, Leslie Viljoen <leslieviljoen@gmail.com> wrote:
>
> My webby executable ended up in /usr/bin/webby. I installed gems via the
> deb package (wajig install rubygems).

Thanks for the pointer to wajig! I tried uninstalling and reinstalling
webby and gems, just in case it had done something wrong the first
time, but still no /usr/bin installs. But adding the gem bin directory
to path works for me.

martin

David Masover

6/10/2008 5:02:00 PM

0

On Tuesday 10 June 2008 09:49:55 miles.sterrett@gmail.com wrote:

> Incidentally, it is acceptable, if not recommended, to install
> RubyGems from source. Because RubyGems can update itself, you can run
> into issues with both apt/aptitude/Synaptic and RubyGems trying to
> update RubyGems.

However, if I install RubyGems from apt, all gems are entirely contained
in /var/lib/gems. It provides a nice conceptual break between the package
managers -- gems go here, apt gets everything else.

The solution here is fairly simple: I don't ever tell RubyGems to update
itself, or any part of Ruby which is installed via apt. However, I do use
RubyGems to install everything else, rather than using the libfoo-ruby
packages.

It would be nice to have an Ubuntu repository autogenerated from gems, though.
Even this cleanly separated, I don't like having two package managers.

Eric Hodel

6/10/2008 6:11:00 PM

0

On Jun 10, 2008, at 07:49 AM, miles.sterrett@gmail.com wrote:
> On Jun 10, 4:10 am, Martin DeMello <martindeme...@gmail.com> wrote:
>> I've recently switched distributions to ubuntu, and I'm having
>> problems getting webby up and running. (I suspect this a general
>> problem with gems that need to install executables). I ran gem
>> install
>> webby, and it installed happily enough into
>> /var/lib/gems/1.8/gems/webby-0.8.4/, but didn't install the webby
>> executable anywhere in path. I checked for an ubuntu package, but
>> there wasn't one. Of course, I could simply install it all by hand,
>> but that seems like the wrong thing to do - I'd rather figure out how
>> to get my gems playing nicely with ubuntu.
>>
>> ruby -v: ruby 1.8.6 (2007-09-24 patchlevel 111) [i486-linux]
>> gem -v: 0.9.4
>> /etc/lsb-release:DISTRIB_CODENAME=hardy
>>
>> martin
>
> I am running Ubuntu 8.04. I installed RubyGems from source. I just
> installed webby, and it placed an executable file in /usr/bin.
>
> Incidentally, it is acceptable, if not recommended, to install
> RubyGems from source. Because RubyGems can update itself, you can run
> into issues with both apt/aptitude/Synaptic and RubyGems trying to
> update RubyGems.

I don't recommend installing RubyGems from source over a package.
Choose whichever makes you most comfortable.

I do recommend only continuing to upgrade RubyGems however you
initially installed it. Upgrading RubyGems via `gem update --system`
instead of through the packager you installed it with may lead to
undesired behavior.

Leslie Viljoen

6/10/2008 7:01:00 PM

0

On Tue, Jun 10, 2008 at 8:10 PM, Eric Hodel <drbrain@segment7.net> wrote:
> On Jun 10, 2008, at 07:49 AM, miles.sterrett@gmail.com wrote:
>>
>> On Jun 10, 4:10 am, Martin DeMello <martindeme...@gmail.com> wrote:
>>>
>>> I've recently switched distributions to ubuntu, and I'm having
>>> problems getting webby up and running. (I suspect this a general
>>> problem with gems that need to install executables). I ran gem install
>>> webby, and it installed happily enough into
>>> /var/lib/gems/1.8/gems/webby-0.8.4/, but didn't install the webby
>>> executable anywhere in path. I checked for an ubuntu package, but
>>> there wasn't one. Of course, I could simply install it all by hand,
>>> but that seems like the wrong thing to do - I'd rather figure out how
>>> to get my gems playing nicely with ubuntu.
>>>
>>> ruby -v: ruby 1.8.6 (2007-09-24 patchlevel 111) [i486-linux]
>>> gem -v: 0.9.4
>>> /etc/lsb-release:DISTRIB_CODENAME=hardy
>>>
>>> martin
>>
>> I am running Ubuntu 8.04. I installed RubyGems from source. I just
>> installed webby, and it placed an executable file in /usr/bin.
>>
>> Incidentally, it is acceptable, if not recommended, to install
>> RubyGems from source. Because RubyGems can update itself, you can run
>> into issues with both apt/aptitude/Synaptic and RubyGems trying to
>> update RubyGems.
>
> I don't recommend installing RubyGems from source over a package. Choose
> whichever makes you most comfortable.
>
> I do recommend only continuing to upgrade RubyGems however you initially
> installed it. Upgrading RubyGems via `gem update --system` instead of
> through the packager you installed it with may lead to undesired behavior.

Oh? Perhaps 'gem update --system' should check if it was installed via Apt
and refuse to update then. Not realising the danger here, I have updated gem
in exactly this way quite a few times.

I haven't noticed any problems but I suppose if I tried to cleanly remove gem
with apt things would break? Actually I have been running and updating apt in
this way since two Ubuntu releases ago, and have done two Ubuntu upgrades
in between without noticing any problems!


Les

Eric Hodel

6/10/2008 7:50:00 PM

0

On Jun 10, 2008, at 12:01 PM, Leslie Viljoen wrote:
> On Tue, Jun 10, 2008 at 8:10 PM, Eric Hodel <drbrain@segment7.net>
> wrote:
>> On Jun 10, 2008, at 07:49 AM, miles.sterrett@gmail.com wrote:
>>> Incidentally, it is acceptable, if not recommended, to install
>>> RubyGems from source. Because RubyGems can update itself, you can
>>> run
>>> into issues with both apt/aptitude/Synaptic and RubyGems trying to
>>> update RubyGems.
>>
>> I don't recommend installing RubyGems from source over a package.
>> Choose
>> whichever makes you most comfortable.
>>
>> I do recommend only continuing to upgrade RubyGems however you
>> initially
>> installed it. Upgrading RubyGems via `gem update --system`
>> instead of
>> through the packager you installed it with may lead to undesired
>> behavior.
>
> Oh? Perhaps 'gem update --system' should check if it was installed
> via Apt
> and refuse to update then. Not realising the danger here, I have
> updated gem
> in exactly this way quite a few times.

This would have to work for every packaged RubyGems. I don't know of
a way to do that so it wouldn't break somewhere.

> I haven't noticed any problems but I suppose if I tried to cleanly
> remove gem
> with apt things would break? Actually I have been running and
> updating apt in
> this way since two Ubuntu releases ago, and have done two Ubuntu
> upgrades
> in between without noticing any problems!


Last I looked, apt RubyGems changes the default gem repository by hard-
coding a path. Updating would cause gems to "disappear" because
RubyGems would switch back to the default path.