Rails - Oct 2006 - Trouble with Capistrano and custom symlink from shared directory

Hi there

I have a Rails app which requires the client to upload image files to
a certain directory.

I''m using capistrano to deploy and have created a directory in shared:
shared/book_images

I want to symlink this to my_rails_app/public/images/book_images and
have this task in my deploy.rb file:

desc "Link to the book images directory where uploads go"
task :after_symlink do
 run "ln -nfs #{shared_dir}/book_images
#{release_path}/public/images/book_images"
end


However, iif I ssh into the current release, I see that the symlink
above is incorrect: the symlink to the shared book_images directory is
_inside_ of public/images/book_images

that is, I end up with public/images/book_images/book_images

Any clues on how to resolve this would be appreciated.

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Richard Sandilands wrote:
> Hi there
>
> I have a Rails app which requires the client to upload image files to
> a certain directory.
>
> I''m using capistrano to deploy and have created a directory in
shared:
> shared/book_images
>
> I want to symlink this to my_rails_app/public/images/book_images and
> have this task in my deploy.rb file:
>
> desc "Link to the book images directory where uploads go"
> task :after_symlink do
>  run "ln -nfs #{shared_dir}/book_images
> #{release_path}/public/images/book_images"
> end
>
>
> However, iif I ssh into the current release, I see that the symlink
> above is incorrect: the symlink to the shared book_images directory is
> _inside_ of public/images/book_images
>
> that is, I end up with public/images/book_images/book_images
>
> Any clues on how to resolve this would be appreciated.
>   
Does your release_path/public already contain an images/book_images 
directory *before* you symlink?  I seem to remember having a similar 
problem and it was because I already had a public/photos directory in 
subversion and so when I deployed the app and then tried to link 
public/photos to shared/photos, I remember something screwy happening.  
My quicky hack workaround was to delete the real directory before I did 
the symlink, i.e.:

task :after_update_code, :roles => :app do
  run "rm -rf #{release_path}/public/photos"
  run "ln -nfs #{shared_path}/photos #{release_path}/public/photos"
end

HTH,

Jamey

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On 11/1/06, Jamey Cribbs <jcribbs-5tZyCCM3m2VWk0Htik3J/w@public.gmane.org>
wrote:
> Does your release_path/public already contain an images/book_images
> directory *before* you symlink?
Yes and adding ''rm -rf'' to the task fixes the issue.

Many thanks Jamey.

-- 
Richard Sandilands

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Upon closer inspection, the sylink is created fine, but for some
reason I can''t access the symlinked directory. It''s
permissions are
the same as other directories but if I try and cd into it, I get ''no
such file or directory''.

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You could link the book_images/ backwards to ../../shared/book_images
and keep the link under version control. Just an idea.


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don''t you mean #{shared_path}

I do the same thing and it looks like this in my config/deploy.rb :

<code>

desc "Create the #{shared_dir}/files/production|development|test dirs
"
+
     "if they don''t exists and add symlink to #{shared_dir}/files
from
" +
     "the current release path"
task :symlink_files_dir, :roles => :app do
 
[''production'',''development'',''test''].each
do |env|
      run "mkdir -p #{shared_path}/files/#{env}" unless
File.exists?("#{shared_path}/files/#{env}")
  end
  # change owner and permission of files
  sudo "chown --recursive #{user}:#{apache_group}
#{shared_path}/files"
  sudo "chmod --recursive 774 #{shared_path}/files"
  run "mv #{release_path}/files #{release_path}/files.local"
  run "ln -s #{shared_path}/files #{release_path}/files"
end

desc "Do these tasks after you update the code"
task :after_update_code do
  symlink_files_dir
end

</code>


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Yeah - all is working fine now. Many thanks.

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