Rails - Aug 2005 - SwitchTower CVS support

I did an svn up this morning and discovered this whole new bundle of code!

Lookingn through it it looks cool, but there''s no CVS support for an
SCM
- I''d have thought this would be more widely used than darcs.  Looking 
at the code for subversion.rb and I thought it''d be possible to add a 
new scm - CVS.

I''m running into 3 problems:
1- I''m still learning ruby so therefore I''m crap
2- I don''t have the required infrastructure to test the resulting
script
3- Is it possible to discover the latest version of a repo fro CVS -
I''m
not sure it is as each file has an individual version number, this makes 
writing the latest_revision method a bit of a mare.

Anyway here''s where I got upto before I was dragged off to work on some
Java for a customer;


module SwitchTower
  module SCM
 
    # An SCM module for using CVS as your source control tool. Use it by
    # specifying the following line in your configuration:
    #
    #   set :scm, :cvs
    #
    # Also, this module accepts a <tt>:cvs</tt> configuration
variable,
    # which (if specified) will be used as the full path to the darcs
    # executable on the remote machine:
    #
    #   set :cvs, "/opt/local/bin/cvs"
    class CVS
      attr_reader :configuration
     
      def initialize(configuration)
        @configuration = configuration
      end
     
      def checkout(actor)
        cvs = configuration[:cvs] ? configuration[:cvs] : "cvs"
   
    command = <<-CMD
      if [[ ! -d #{actor.release_path} ]]; then
            #{cvs} co #{configuration.repository} #{actor.release_path}
          fi
    CMD
    actor.run(command)
      end
    end
   
  end
end

As you can see it''s nothing more than a rip-off of the subversion one, 
minus the subversion bits.  I got this far and then ran into a problem 
of being able to test it.  Any thoughts on whether this would be useful 
(as a task for switchtower), how to solve the latest_revision problem 
(note I just ripped it out when I realized it wasn''t going to be easy -
I wanted quick feedback!)

Kev

On Aug 3, 2005, at 11:06 PM, Kev Jackson wrote:
> I did an svn up this morning and discovered this whole new bundle  
> of code!
>
> Lookingn through it it looks cool, but there''s no CVS support for
> an SCM - I''d have thought this would be more widely used than  
> darcs.  Looking at the code for subversion.rb and I thought it''d
be
> possible to add a new scm - CVS.
Part of the Rails philosophy has been "don''t implement it until
you
need it." Since at 37signals we use a subversion repo for our apps,  
that was implemented first. Several members of the core team also use  
darcs, so that was implemented next. None of us are using CVS, so no  
attempt was made to implement it--I was just waiting for an  
enterprising soul (like yourself, Kev!) to do it for me. ;)
> I''m running into 3 problems:
> 1- I''m still learning ruby so therefore I''m crap
> 2- I don''t have the required infrastructure to test the resulting
> script
> 3- Is it possible to discover the latest version of a repo fro CVS  
> - I''m not sure it is as each file has an individual version
number,
> this makes writing the latest_revision method a bit of a mare.
>
> Anyway here''s where I got upto before I was dragged off to work on
> some Java for a customer;
Excellent start, Kev. If anyone does get a CVS version working,  
please submit a patch. I haven''t used CVS myself in quite a long  
time, so I''m afraid I won''t be much help in ironing out the
snarls
you ran into, or in testing it. :(

- Jamis
>
>
> module SwitchTower
>  module SCM
>    # An SCM module for using CVS as your source control tool. Use  
> it by
>    # specifying the following line in your configuration:
>    #
>    #   set :scm, :cvs
>    #
>    # Also, this module accepts a <tt>:cvs</tt> configuration
variable,
>    # which (if specified) will be used as the full path to the darcs
>    # executable on the remote machine:
>    #
>    #   set :cvs, "/opt/local/bin/cvs"
>    class CVS
>      attr_reader :configuration
>          def initialize(configuration)
>        @configuration = configuration
>      end
>          def checkout(actor)
>        cvs = configuration[:cvs] ? configuration[:cvs] : "cvs"
>      command = <<-CMD
>      if [[ ! -d #{actor.release_path} ]]; then
>            #{cvs} co #{configuration.repository} #{actor.release_path}
>          fi
>    CMD
>    actor.run(command)
>      end
>    end
>    end
> end
>
> As you can see it''s nothing more than a rip-off of the subversion
> one, minus the subversion bits.  I got this far and then ran into a  
> problem of being able to test it.  Any thoughts on whether this  
> would be useful (as a task for switchtower), how to solve the  
> latest_revision problem (note I just ripped it out when I realized  
> it wasn''t going to be easy - I wanted quick feedback!)
>
> Kev
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