Problem with rake gems:install

[Adam Akhtar-2]

Hi list.

I've added the following line to my `config/environment.rb` file, within
the `Initializer`:

    config.gem 'mislav-will_paginate', :version => '2.3.11', :lib =>
'will_paginate', :source => 'http://gems.github.com'

When I then run the command `sudo rake gems:install`, I get the
following output:

    tkn@tkn-desktop-ubuntu ~/work/trunk $ sudo rake gems:install
    (in /home/tkn/work/trunk)
    Missing these required gems:
      mislav-will_paginate  = 2.3.11

    You're running:
      ruby 1.8.6.287 at /usr/local/bin/ruby
      rubygems 1.3.1 at /home/tkn/.gem/ruby/1.8,
/usr/local/lib/ruby/gems/1.8

    Run `rake gems:install` to install the missing gems.

What is going on here?
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[Matt Jones]

What version of rails are you running?

--Matt Jones

On Jun 26, 6:09 am, Troels Knak-nielsen <rails-mailing-l...@andreas-
s.net> wrote:

> Hi list.
>
> I've added the following line to my `config/environment.rb` file, within
> the `Initializer`:
>
>     config.gem 'mislav-will_paginate', :version => '2.3.11', :lib =>
> 'will_paginate', :source => 'http://gems.github.com'
>
> When I then run the command `sudo rake gems:install`, I get the
> following output:
>
>     tkn@tkn-desktop-ubuntu ~/work/trunk $ sudo rake gems:install
>     (in /home/tkn/work/trunk)
>     Missing these required gems:
>       mislav-will_paginate  = 2.3.11
>
>     You're running:
>       ruby 1.8.6.287 at /usr/local/bin/ruby
>       rubygems 1.3.1 at /home/tkn/.gem/ruby/1.8,
> /usr/local/lib/ruby/gems/1.8
>
>     Run `rake gems:install` to install the missing gems.
>
> What is going on here?
> --
> Posted viahttp://www.ruby-forum.com/.

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[Adam Akhtar-2]

Matt Jones wrote:
> What version of rails are you running?

2.3.2

I found out what the problem is though. Some gems are loaded by the
Rails initializer, so if they are missing, the rake tasks can't be
loaded. It's a catch-22 really. I wrote a wrapper script to fix it. If
any body else needs it, you can get it from here:

http://gist.github.com/136461

Just put in `script/install_gems` and remember to `chmod +x`.

--
troels
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[Adam Akhtar-2]

More info on the matter here (And a hackety workaround):

http://www.railsforum.com/viewtopic.php?id=28417

--
troels
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[Adam Akhtar-2]

I use mislav-will_paginate.

I place the following at the bottom of my environment.rb file:

require "will_paginate"

Make sure you place it after the end in configs...

I'm using 2.3.2

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[Matt Jones]

You shouldn't be seeing this problem with 2.3.2 - I just tried it in a
fresh Rails app using the 2.3.2 gem. Something weird's going on in
your version, as the install task sets $gems_rake_task which *should*
prevent the display of the error message you're seeing.

Do you happen to have an RC version frozen in vendor/rails? That's my
next guess...

--Matt Jones

On Jun 27, 2:51 pm, Troels Knak-nielsen <rails-mailing-l...@andreas-
s.net> wrote:

> Matt Jones wrote:
> > What version of rails are you running?
>
> 2.3.2
>
> I found out what the problem is though. Some gems are loaded by the
> Rails initializer, so if they are missing, the rake tasks can't be
> loaded. It's a catch-22 really. I wrote a wrapper script to fix it. If
> any body else needs it, you can get it from here:
>
> http://gist.github.com/136461
>
> Just put in `script/install_gems` and remember to `chmod +x`.
>
> --
> troels
> --
> Posted viahttp://www.ruby-forum.com/.

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[Aristedes Maniatis]

On Jun 29, 4:03 am, Matt Jones <al2o...@...> wrote:
> You shouldn't be seeing this problem with 2.3.2 - I just tried it in a
> fresh Rails app using the 2.3.2 gem. Something weird's going on in
> your version, as the install task sets $gems_rake_task which *should*
> prevent the display of the error message you're seeing.

I have exactly the same problem with Rails 2.3.2. Since it is an open
source project, you can easily grab it from here and verify for
yourself the problem:

http://github.com/ari/clockingit/tree/master


Ari Maniatis

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[Adam Akhtar-2]

Matt Jones wrote:
> Do you happen to have an RC version frozen in vendor/rails? That's my
> next guess...

Nope, but it's an application that has been upgraded from an older
version, so there might be some leftover somewhere, that is causing
this. I'll try to see if I can replicate the issue in a fresh project.

--
troels
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[Matt Jones]

Ari: your problem is in lib/tasks/localization.rake. You require
config/environment, which loads the initializer and causes the error.
The gems tasks never even get a chance to run.

Troels - I'd recommend that you look for the same kind of thing in
your Rakefiles.

--Matt Jones

On Jun 28, 6:37 pm, Ari Maniatis <a...@...> wrote:

> On Jun 29, 4:03 am, Matt Jones <al2o...@...> wrote:
>
> > You shouldn't be seeing this problem with 2.3.2 - I just tried it in a
> > fresh Rails app using the 2.3.2 gem. Something weird's going on in
> > your version, as the install task sets $gems_rake_task which *should*
> > prevent the display of the error message you're seeing.
>
> I have exactly the same problem with Rails 2.3.2. Since it is an open
> source project, you can easily grab it from here and verify for
> yourself the problem:
>
> http://github.com/ari/clockingit/tree/master
>
> Ari Maniatis

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[Aristedes Maniatis]

Matt: thank you so much for finding that. I have removed it and the
problem goes away as you say. Can I recommend some improvements to
Rails to help others in this predicament:

* rake gems:install should not try to load all the rake tasks since it
has a very specific job to do and should not be sidetracked by loading
everything it comes across on the class path

* better error reporting which detects this condition and reports
where the problem might lie


Thank you again for your help.

Ari Maniatis
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[Adam Akhtar-2]

Matt Jones wrote:
> Troels - I'd recommend that you look for the same kind of thing in
> your Rakefiles.

Indeed - I had a rake task in `lib/tasks/` that included
`config/environment.rb`. Thanks for your help.

Ari Maniatis wrote:
> * rake gems:install should not try to load all the rake tasks since it
> has a very specific job to do and should not be sidetracked by loading
> everything it comes across on the class path

That's not possible. Rake works by finding files with the name *.task
and then loading them. If these files try to invoke gems at load-time,
there is nothing rake can do. It's a fundamentally design
flaw/limitation of rake.

> * better error reporting which detects this condition and reports
> where the problem might lie

Would definitely be nice with a trace that points to the error.

An solution could also be to move the `config.gem` lines from
`config/environment.rb` into a separate file (Say -
`config/gemconf.rb`), and then include it in the config file. This would
make it possible to write a script in `script/`, that loads this config
file and invokes gem for each dependency. Since it doesn't depend on
rake, it wouldn't have the load-time-dependencies problem.

The reason I'm suggesting this is that some times you really need
load-time dependencies in your rake tasks; Namely if your task extends
some generic task, present in a gem. For example, installing the
`rails_rcov` plugin [1] will cause an error if you don't have the `rcov`
gem installed, since the task depends on the file `rcov/rcovtask`.
Having a script that didn't use rake, would solve this problem entirely.

Might the rails developers be interested in a patch for this?

[1] http://svn.codahale.com/rails_rcov

--
troels
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[Adam Akhtar-2]

FYI, I have created a plugin, that moves gem-dependencies into a
separate file (`config/gemconf.rb`) and then makes `script/install_gems`
use this file for finding dependencies. This makes the install script
completely independent of rake and any rake tasks.

http://github.com/troelskn/gemconf_plugin/tree/master

You can install it to you existing Rails projects, using:

    ./script/plugin install
http://github.com/troelskn/gemconf_plugin/tree/master

Hope this helps someone.

--
troels
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[Adam Akhtar-2]

Troels Knak-nielsen wrote:

> FYI, I have created a plugin, that moves gem-dependencies into a
> separate file (`config/gemconf.rb`) and then makes `script/install_gems`
> use this file for finding dependencies. This makes the install script
> completely independent of rake and any rake tasks.
>
> http://github.com/troelskn/gemconf_plugin/tree/master
>
> You can install it to you existing Rails projects, using:
>
>     ./script/plugin install
> http://github.com/troelskn/gemconf_plugin/tree/master
>
> Hope this helps someone.
>
> --
> troels

Thanks troels. I am using your plugin now. It is working well. Although
I had to comment out 'unless local_install' line 55 as I'm not running
as root but do have superuser access(cygwin).

Thanks for developing this plugin!

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